Upgrade to flutter 3 (#70)

Co-authored-by: John Maguire <contact@johnmaguire.me>

README.md

@@ -1,16 +1,30 @@
-# Dependencies
+## Setting up dev environment
 
-- [`flutter`](https://flutter.dev/docs/get-started/install)
-- [`gomobile`](https://godoc.org/golang.org/x/mobile/cmd/gomobile)
+Install all of the following things:
+
+- [`xcode`](https://apps.apple.com/us/app/xcode/)
 - [`android-studio`](https://developer.android.com/studio)
-- [Enable NDK](https://developer.android.com/studio/projects/install-ndk) Check local.properties for current NDK version
+- [`flutter` 3.3.2](https://docs.flutter.dev/get-started/install)
+- [`gomobile`](https://pkg.go.dev/golang.org/x/mobile/cmd/gomobile)
+- [Flutter Android Studio Extension](https://docs.flutter.dev/get-started/editor?tab=androidstudio)
 
-Currently using flutter 2.0.5
+Ensure your path is set up correctly to execute flutter
 
-Copy env.sh.example to env.sh and update your PATH variable to expose both flutter and go bin directories
+Run `flutter doctor` and fix everything it complains before proceeding
 
-  ```export PATH="$PATH:/path/to/go/bin:/path/to/flutter/bin"```
+*NOTE* on iOS, always open `Runner.xcworkspace` and NOT the `Runner.xccodeproj`
 
+### Before first compile
+
+- Copy `env.sh.example` and set it up for your machine
+- Ensure you have run `gomobile init`
+- In Android Studio, make sure you have the current ndk installed by going to Tools -> SDK Manager, go to the SDK Tools tab, check the `Show package details` box, expand the NDK section and select `21.1.6352462` version.
+- Ensure you have downloaded an ndk via android studio, this is likely not the default one and you need to check the
+  `Show package details` box to select the correct version. The correct version comes from the error when you try and compile
+- Make sure you have `gem` installed with `sudo gem install`
+- If on MacOS arm, `sudo gem install ffi -- --enable-libffi-alloc`
+
+If you are having issues with iOS pods, try blowing it all away! `cd ios && rm -rf Pods/ Podfile.lock && pod install --repo-update`
 
 # Formatting
 
@@ -21,7 +35,6 @@ Use:
 flutter format lib/ test/ -l 120
 ```
 
-
 # Release
 
 Update `version` in `pubspec.yaml` to reflect this release, then

android/.gitignore

@@ -6,3 +6,4 @@ gradle-wrapper.jar
 /local.properties
 GeneratedPluginRegistrant.java
 /build/build-attribution/
+/mobileNebula/mobileNebula.aar

android/app/build.gradle

@@ -32,23 +32,28 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
     defaultConfig {
         applicationId "net.defined.mobile_nebula"
-        minSdkVersion 29
-        targetSdkVersion 30
+        minSdkVersion 29 //flutter.minSdkVersion
+        targetSdkVersion 30 //flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
     signingConfigs {
@@ -62,17 +67,18 @@ android {
 
     buildTypes {
         release {
-            signingConfig signingConfigs.release
-
-            // We are disabling minification and proguard because it wrecks the crypto for storing keys
-            // Ideally we would turn these on. We had issues with gson as well but resolved those with proguardFiles
-            shrinkResources false
-            minifyEnabled false
-            useProguard false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-
+//            signingConfig signingConfigs.release
+//
+//            // We are disabling minification and proguard because it wrecks the crypto for storing keys
+//            // Ideally we would turn these on. We had issues with gson as well but resolved those with proguardFiles
+//            shrinkResources false
+//            minifyEnabled false
+//            useProguard false
+//            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+//
             resValue 'string', 'app_name', '"Nebula"'
         }
+
         debug {
             resValue 'string', 'app_name', '"Nebula-DEBUG"'
             applicationIdSuffix '.debug'
@@ -84,26 +90,9 @@ flutter {
     source '../..'
 }
 
-repositories {
-    flatDir {
-        dirs 'src/main/libs'
-    }
-}
-
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "androidx.security:security-crypto:1.0.0-rc02"
+    implementation "androidx.security:security-crypto:1.0.0"
     implementation 'com.google.code.gson:gson:2.8.6'
-
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
-    implementation (name:'mobileNebula', ext:'aar') {
-        exec {
-            workingDir '../../'
-            environment("ANDROID_NDK_HOME", android.ndkDirectory)
-            environment("ANDROID_HOME", android.sdkDirectory)
-            commandLine './gen-artifacts.sh', 'android'
-        }
-    }
+    implementation project(':mobileNebula')
 }

android/app/src/main/AndroidManifest.xml

@@ -9,11 +9,12 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-feature android:name="android.hardware.camera" android:required="false" />
     <application
-        android:name="io.flutter.app.FlutterApplication"
+        android:name="${applicationName}"
         android:label="@string/app_name"
         android:icon="@mipmap/ic_launcher">
         <service android:name=".NebulaVpnService"
             android:permission="android.permission.BIND_VPN_SERVICE"
+            android:exported="false"
             android:process=":nebulaVpnBg">
             <intent-filter>
                 <action android:name="android.net.VpnService"/>
@@ -21,6 +22,7 @@
         </service>
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

android/app/src/main/kotlin/net/defined/mobile_nebula/Share.kt

@@ -33,7 +33,7 @@ class Share {
 
             } catch (err: Exception) {
                 Log.println(Log.ERROR, "", "Share: Error")
-                result.error(err.message, null, null)
+                result.error(err.message ?: "Unknown error", null, null)
             }
         }
 
@@ -67,7 +67,7 @@ class Share {
 
             } catch (err: Exception) {
                 Log.println(Log.ERROR, "", "Share: Error")
-                result.error(err.message, null, null)
+                result.error(err.message ?: "Unknown error", null, null)
             }
         }
 
@@ -107,7 +107,7 @@ class Share {
 
             } catch (err: Exception) {
                 Log.println(Log.ERROR, "", "Share: Error")
-                return result.error(err.message, null, null)
+                return result.error(err.message ?: "Unknown error", null, null)
             }
 
             result.success(true)

android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.3.61'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.0'
+        classpath 'com.android.tools.build:gradle:7.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -14,7 +14,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

android/gradle.properties

@@ -1,4 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Fri Jun 05 14:55:48 CDT 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

android/mobileNebula/build.gradle

@@ -0,0 +1,6 @@
+configurations.maybeCreate("default")
+exec {
+    workingDir '../../'
+    commandLine './gen-artifacts.sh', 'android'
+}
+artifacts.add("default", file('mobileNebula.aar'))

android/settings.gradle

@@ -1,15 +1,11 @@
-include ':app'
+include ':app', ':mobileNebula'
 
-def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
 
-def plugins = new Properties()
-def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
-if (pluginsFile.exists()) {
-    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
-}
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-plugins.each { name, path ->
-    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
-    include ":$name"
-    project(":$name").projectDir = pluginDirectory
-}
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

android/settings_aar.gradle

@@ -1 +0,0 @@
-include ':app'

gen-artifacts.sh

@@ -16,9 +16,9 @@ if [ "$1" = "ios" ]; then
 elif [ "$1" = "android" ]; then
   # Build nebula for android
   make mobileNebula.aar
-  mkdir -p ../android/app/src/main/libs
-  rm -rf ../android/app/src/main/libs/mobileNebula.aar
-  cp mobileNebula.aar ../android/app/src/main/libs/mobileNebula.aar
+  mkdir -p ../android/mobileNebula
+  rm -rf ../android/mobileNebula/mobileNebula.aar
+  cp mobileNebula.aar ../android/mobileNebula/mobileNebula.aar
 
 else
   echo "Error: unsupported target os $1"

ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>11.0</string>
 </dict>
 </plist>

ios/Podfile.lock

@@ -1,64 +1,57 @@
 PODS:
-  - barcode_scan (0.0.1):
-    - Flutter
-    - MTBBarcodeScanner
-    - SwiftProtobuf
-  - DKImagePickerController/Core (4.3.0):
+  - DKImagePickerController/Core (4.3.4):
     - DKImagePickerController/ImageDataManager
     - DKImagePickerController/Resource
-  - DKImagePickerController/ImageDataManager (4.3.0)
-  - DKImagePickerController/PhotoGallery (4.3.0):
+  - DKImagePickerController/ImageDataManager (4.3.4)
+  - DKImagePickerController/PhotoGallery (4.3.4):
     - DKImagePickerController/Core
     - DKPhotoGallery
-  - DKImagePickerController/Resource (4.3.0)
-  - DKPhotoGallery (0.0.15):
-    - DKPhotoGallery/Core (= 0.0.15)
-    - DKPhotoGallery/Model (= 0.0.15)
-    - DKPhotoGallery/Preview (= 0.0.15)
-    - DKPhotoGallery/Resource (= 0.0.15)
+  - DKImagePickerController/Resource (4.3.4)
+  - DKPhotoGallery (0.0.17):
+    - DKPhotoGallery/Core (= 0.0.17)
+    - DKPhotoGallery/Model (= 0.0.17)
+    - DKPhotoGallery/Preview (= 0.0.17)
+    - DKPhotoGallery/Resource (= 0.0.17)
     - SDWebImage
-    - SDWebImageFLPlugin
-  - DKPhotoGallery/Core (0.0.15):
+    - SwiftyGif
+  - DKPhotoGallery/Core (0.0.17):
     - DKPhotoGallery/Model
     - DKPhotoGallery/Preview
     - SDWebImage
-    - SDWebImageFLPlugin
-  - DKPhotoGallery/Model (0.0.15):
+    - SwiftyGif
+  - DKPhotoGallery/Model (0.0.17):
     - SDWebImage
-    - SDWebImageFLPlugin
-  - DKPhotoGallery/Preview (0.0.15):
+    - SwiftyGif
+  - DKPhotoGallery/Preview (0.0.17):
     - DKPhotoGallery/Model
     - DKPhotoGallery/Resource
     - SDWebImage
-    - SDWebImageFLPlugin
-  - DKPhotoGallery/Resource (0.0.15):
+    - SwiftyGif
+  - DKPhotoGallery/Resource (0.0.17):
     - SDWebImage
-    - SDWebImageFLPlugin
+    - SwiftyGif
   - file_picker (0.0.1):
     - DKImagePickerController/PhotoGallery
     - Flutter
-  - FLAnimatedImage (1.0.12)
   - Flutter (1.0.0)
-  - MTBBarcodeScanner (5.0.11)
+  - flutter_barcode_scanner (2.0.0):
+    - Flutter
   - package_info (0.0.1):
     - Flutter
   - path_provider_ios (0.0.1):
     - Flutter
-  - SDWebImage (5.8.0):
-    - SDWebImage/Core (= 5.8.0)
-  - SDWebImage/Core (5.8.0)
-  - SDWebImageFLPlugin (0.4.0):
-    - FLAnimatedImage (>= 1.0.11)
-    - SDWebImage/Core (~> 5.6)
-  - SwiftProtobuf (1.9.0)
+  - SDWebImage (5.13.3):
+    - SDWebImage/Core (= 5.13.3)
+  - SDWebImage/Core (5.13.3)
+  - SwiftyGif (5.4.3)
   - SwiftyJSON (5.0.1)
   - url_launcher_ios (0.0.1):
     - Flutter
 
 DEPENDENCIES:
-  - barcode_scan (from `.symlinks/plugins/barcode_scan/ios`)
   - file_picker (from `.symlinks/plugins/file_picker/ios`)
   - Flutter (from `Flutter`)
+  - flutter_barcode_scanner (from `.symlinks/plugins/flutter_barcode_scanner/ios`)
   - package_info (from `.symlinks/plugins/package_info/ios`)
   - path_provider_ios (from `.symlinks/plugins/path_provider_ios/ios`)
   - SwiftyJSON (~> 5.0)
@@ -68,20 +61,17 @@ SPEC REPOS:
   trunk:
     - DKImagePickerController
     - DKPhotoGallery
-    - FLAnimatedImage
-    - MTBBarcodeScanner
     - SDWebImage
-    - SDWebImageFLPlugin
-    - SwiftProtobuf
+    - SwiftyGif
     - SwiftyJSON
 
 EXTERNAL SOURCES:
-  barcode_scan:
-    :path: ".symlinks/plugins/barcode_scan/ios"
   file_picker:
     :path: ".symlinks/plugins/file_picker/ios"
   Flutter:
     :path: Flutter
+  flutter_barcode_scanner:
+    :path: ".symlinks/plugins/flutter_barcode_scanner/ios"
   package_info:
     :path: ".symlinks/plugins/package_info/ios"
   path_provider_ios:
@@ -90,21 +80,18 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/url_launcher_ios/ios"
 
 SPEC CHECKSUMS:
-  barcode_scan: a5c27959edfafaa0c771905bad0b29d6d39e4479
-  DKImagePickerController: 397702a3590d4958fad336e9a77079935c500ddb
-  DKPhotoGallery: e880aef16c108333240e1e7327896f2ea380f4f0
-  file_picker: 3e6c3790de664ccf9b882732d9db5eaf6b8d4eb1
-  FLAnimatedImage: 4a0b56255d9b05f18b6dd7ee06871be5d3b89e31
-  Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
-  MTBBarcodeScanner: f453b33c4b7dfe545d8c6484ed744d55671788cb
+  DKImagePickerController: b512c28220a2b8ac7419f21c491fc8534b7601ac
+  DKPhotoGallery: fdfad5125a9fdda9cc57df834d49df790dbb4179
+  file_picker: 817ab1d8cd2da9d2da412a417162deee3500fc95
+  Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
+  flutter_barcode_scanner: 7a1144744c28dc0c57a8de7218ffe5ec59a9e4bf
   package_info: 873975fc26034f0b863a300ad47e7f1ac6c7ec62
   path_provider_ios: 7d7ce634493af4477d156294792024ec3485acd5
-  SDWebImage: 84000f962cbfa70c07f19d2234cbfcf5d779b5dc
-  SDWebImageFLPlugin: 6c2295fb1242d44467c6c87dc5db6b0a13228fd8
-  SwiftProtobuf: ecbec1be9036d15655f6b3443a1c4ea693c97932
+  SDWebImage: af5bbffef2cde09f148d826f9733dcde1a9414cd
+  SwiftyGif: 6c3eafd0ce693cad58bb63d2b2fb9bacb8552780
   SwiftyJSON: 2f33a42c6fbc52764d96f13368585094bfd8aa5e
   url_launcher_ios: 02f1989d4e14e998335b02b67a7590fa34f971af
 
 PODFILE CHECKSUM: 92e176614f91c6517d4254a0edec8b66f076c77e
 
-COCOAPODS: 1.10.1
+COCOAPODS: 1.11.3

ios/Runner.xcodeproj/project.pbxproj

@@ -339,14 +339,11 @@
 				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/DKImagePickerController/DKImagePickerController.framework",
 				"${BUILT_PRODUCTS_DIR}/DKPhotoGallery/DKPhotoGallery.framework",
-				"${BUILT_PRODUCTS_DIR}/FLAnimatedImage/FLAnimatedImage.framework",
-				"${BUILT_PRODUCTS_DIR}/MTBBarcodeScanner/MTBBarcodeScanner.framework",
 				"${BUILT_PRODUCTS_DIR}/SDWebImage/SDWebImage.framework",
-				"${BUILT_PRODUCTS_DIR}/SDWebImageFLPlugin/SDWebImageFLPlugin.framework",
-				"${BUILT_PRODUCTS_DIR}/SwiftProtobuf/SwiftProtobuf.framework",
+				"${BUILT_PRODUCTS_DIR}/SwiftyGif/SwiftyGif.framework",
 				"${BUILT_PRODUCTS_DIR}/SwiftyJSON/SwiftyJSON.framework",
-				"${BUILT_PRODUCTS_DIR}/barcode_scan/barcode_scan.framework",
 				"${BUILT_PRODUCTS_DIR}/file_picker/file_picker.framework",
+				"${BUILT_PRODUCTS_DIR}/flutter_barcode_scanner/flutter_barcode_scanner.framework",
 				"${BUILT_PRODUCTS_DIR}/package_info/package_info.framework",
 				"${BUILT_PRODUCTS_DIR}/path_provider_ios/path_provider_ios.framework",
 				"${BUILT_PRODUCTS_DIR}/url_launcher_ios/url_launcher_ios.framework",
@@ -355,14 +352,11 @@
 			outputPaths = (
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/DKImagePickerController.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/DKPhotoGallery.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FLAnimatedImage.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/MTBBarcodeScanner.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImage.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImageFLPlugin.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SwiftProtobuf.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SwiftyGif.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SwiftyJSON.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/barcode_scan.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/file_picker.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/flutter_barcode_scanner.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/package_info.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider_ios.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/url_launcher_ios.framework",
@@ -558,7 +552,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -596,7 +590,7 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CODE_SIGN_ENTITLEMENTS = NebulaNetworkExtension/NebulaNetworkExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -637,7 +631,7 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CODE_SIGN_ENTITLEMENTS = NebulaNetworkExtension/NebulaNetworkExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -675,7 +669,7 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CODE_SIGN_ENTITLEMENTS = NebulaNetworkExtension/NebulaNetworkExtension.entitlements;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -816,7 +810,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -852,7 +846,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 4;
 				DEVELOPMENT_TEAM = 576H3XS7FP;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (

ios/Runner/Info.plist

@@ -47,5 +47,7 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
 </dict>
 </plist>

lib/components/CIDRField.dart

@@ -8,7 +8,7 @@ import 'IPField.dart';
 //TODO: Support initialValue
 class CIDRField extends StatefulWidget {
   const CIDRField({
-    Key key,
+    Key? key,
     this.ipHelp = "ip address",
     this.autoFocus = false,
     this.focusNode,
@@ -21,12 +21,12 @@ class CIDRField extends StatefulWidget {
 
   final String ipHelp;
   final bool autoFocus;
-  final FocusNode focusNode;
-  final FocusNode nextFocusNode;
-  final ValueChanged<CIDR> onChanged;
-  final TextInputAction textInputAction;
-  final TextEditingController ipController;
-  final TextEditingController bitsController;
+  final FocusNode? focusNode;
+  final FocusNode? nextFocusNode;
+  final ValueChanged<CIDR>? onChanged;
+  final TextInputAction? textInputAction;
+  final TextEditingController? ipController;
+  final TextEditingController? bitsController;
 
   @override
   _CIDRFieldState createState() => _CIDRFieldState();
@@ -44,7 +44,7 @@ class _CIDRFieldState extends State<CIDRField> {
   void initState() {
     //TODO: this won't track external controller changes appropriately
     cidr.ip = widget.ipController?.text ?? "";
-    cidr.bits = int.tryParse(widget.bitsController?.text ?? "");
+    cidr.bits = int.tryParse(widget.bitsController?.text ?? "") ?? 0;
     super.initState();
   }
 
@@ -66,8 +66,12 @@ class _CIDRFieldState extends State<CIDRField> {
                 focusNode: widget.focusNode,
                 nextFocusNode: bitsFocus,
                 onChanged: (val) {
+                  if (widget.onChanged == null) {
+                    return;
+                  }
+
                   cidr.ip = val;
-                  widget.onChanged(cidr);
+                  widget.onChanged!(cidr);
                 },
                 controller: widget.ipController,
               ))),
@@ -81,8 +85,12 @@ class _CIDRFieldState extends State<CIDRField> {
             nextFocusNode: widget.nextFocusNode,
             controller: widget.bitsController,
             onChanged: (val) {
-              cidr.bits = int.tryParse(val ?? "");
-              widget.onChanged(cidr);
+              if (widget.onChanged == null) {
+                return;
+              }
+
+              cidr.bits = int.tryParse(val) ?? 0;
+              widget.onChanged!(cidr);
             },
             maxLength: 2,
             inputFormatters: [FilteringTextInputFormatter.digitsOnly],

lib/components/CIDRFormField.dart

@@ -6,15 +6,15 @@ import 'package:mobile_nebula/validators/ipValidator.dart';
 class CIDRFormField extends FormField<CIDR> {
   //TODO: onSaved, validator, auto-validate, enabled?
   CIDRFormField({
-    Key key,
+    Key? key,
     autoFocus = false,
     enableIPV6 = false,
     focusNode,
     nextFocusNode,
-    ValueChanged<CIDR> onChanged,
-    FormFieldSetter<CIDR> onSaved,
+    ValueChanged<CIDR>? onChanged,
+    FormFieldSetter<CIDR>? onSaved,
     textInputAction,
-    CIDR initialValue,
+    CIDR? initialValue,
     this.ipController,
     this.bitsController,
   }) : super(
@@ -30,14 +30,14 @@ class CIDRFormField extends FormField<CIDR> {
                 return 'Please enter a valid ip address';
               }
 
-              if (cidr.bits == null || cidr.bits > 32 || cidr.bits < 0) {
+              if (cidr.bits > 32 || cidr.bits < 0) {
                 return "Please enter a valid number of bits";
               }
 
               return null;
             },
             builder: (FormFieldState<CIDR> field) {
-              final _CIDRFormField state = field;
+              final _CIDRFormField state = field as _CIDRFormField;
 
               void onChangedHandler(CIDR value) {
                 if (onChanged != null) {
@@ -57,50 +57,50 @@ class CIDRFormField extends FormField<CIDR> {
                   bitsController: state._effectiveBitsController,
                 ),
                 field.hasError
-                    ? Text(field.errorText,
+                    ? Text(field.errorText ?? "Unknown error",
                         style: TextStyle(color: CupertinoColors.systemRed.resolveFrom(field.context), fontSize: 13),
                         textAlign: TextAlign.end)
                     : Container(height: 0)
               ]);
             });
 
-  final TextEditingController ipController;
-  final TextEditingController bitsController;
+  final TextEditingController? ipController;
+  final TextEditingController? bitsController;
 
   @override
   _CIDRFormField createState() => _CIDRFormField();
 }
 
 class _CIDRFormField extends FormFieldState<CIDR> {
-  TextEditingController _ipController;
-  TextEditingController _bitsController;
+  TextEditingController? _ipController = TextEditingController();
+  TextEditingController? _bitsController = TextEditingController();
 
-  TextEditingController get _effectiveIPController => widget.ipController ?? _ipController;
-  TextEditingController get _effectiveBitsController => widget.bitsController ?? _bitsController;
+  TextEditingController get _effectiveIPController => widget.ipController ?? _ipController!;
+  TextEditingController get _effectiveBitsController => widget.bitsController ?? _bitsController!;
 
   @override
-  CIDRFormField get widget => super.widget;
+  CIDRFormField get widget => super.widget as CIDRFormField;
 
   @override
   void initState() {
     super.initState();
     if (widget.ipController == null) {
-      _ipController = TextEditingController(text: widget.initialValue.ip);
+      _ipController = TextEditingController(text: widget.initialValue?.ip);
     } else {
-      widget.ipController.addListener(_handleControllerChanged);
+      widget.ipController!.addListener(_handleControllerChanged);
     }
 
     if (widget.bitsController == null) {
       _bitsController = TextEditingController(text: widget.initialValue?.bits?.toString() ?? "");
     } else {
-      widget.bitsController.addListener(_handleControllerChanged);
+      widget.bitsController!.addListener(_handleControllerChanged);
     }
   }
 
   @override
   void didUpdateWidget(CIDRFormField oldWidget) {
     super.didUpdateWidget(oldWidget);
-    var update = CIDR(ip: widget.ipController?.text, bits: int.tryParse(widget.bitsController?.text ?? "") ?? null);
+    var update = CIDR(ip: widget.ipController?.text ?? "", bits: int.tryParse(widget.bitsController?.text ?? "") ?? 0);
     bool shouldUpdate = false;
 
     if (widget.ipController != oldWidget.ipController) {
@@ -108,12 +108,12 @@ class _CIDRFormField extends FormFieldState<CIDR> {
       widget.ipController?.addListener(_handleControllerChanged);
 
       if (oldWidget.ipController != null && widget.ipController == null) {
-        _ipController = TextEditingController.fromValue(oldWidget.ipController.value);
+        _ipController = TextEditingController.fromValue(oldWidget.ipController!.value);
       }
 
       if (widget.ipController != null) {
         shouldUpdate = true;
-        update.ip = widget.ipController.text;
+        update.ip = widget.ipController!.text;
         if (oldWidget.ipController == null) _ipController = null;
       }
     }
@@ -123,12 +123,12 @@ class _CIDRFormField extends FormFieldState<CIDR> {
       widget.bitsController?.addListener(_handleControllerChanged);
 
       if (oldWidget.bitsController != null && widget.bitsController == null) {
-        _bitsController = TextEditingController.fromValue(oldWidget.bitsController.value);
+        _bitsController = TextEditingController.fromValue(oldWidget.bitsController!.value);
       }
 
       if (widget.bitsController != null) {
         shouldUpdate = true;
-        update.bits = int.parse(widget.bitsController.text);
+        update.bits = int.parse(widget.bitsController!.text);
         if (oldWidget.bitsController == null) _bitsController = null;
       }
     }
@@ -149,8 +149,8 @@ class _CIDRFormField extends FormFieldState<CIDR> {
   void reset() {
     super.reset();
     setState(() {
-      _effectiveIPController.text = widget.initialValue.ip;
-      _effectiveBitsController.text = widget.initialValue.bits.toString();
+      _effectiveIPController.text = widget.initialValue?.ip ?? "";
+      _effectiveBitsController.text = widget.initialValue?.bits.toString() ?? "";
     });
   }
 
@@ -163,7 +163,11 @@ class _CIDRFormField extends FormFieldState<CIDR> {
     // example, the reset() method. In such cases, the FormField value will
     // already have been set.
     final effectiveBits = int.parse(_effectiveBitsController.text);
-    if (_effectiveIPController.text != value.ip || effectiveBits != value.bits) {
+    if (value == null) {
+      return;
+    }
+
+    if (_effectiveIPController.text != value!.ip || effectiveBits != value!.bits) {
       didChange(CIDR(ip: _effectiveIPController.text, bits: effectiveBits));
     }
   }

lib/components/FormPage.dart

@@ -8,11 +8,11 @@ import 'package:mobile_nebula/services/utils.dart';
 /// SimplePage with a form and built in validation and confirmation to discard changes if any are made
 class FormPage extends StatefulWidget {
   const FormPage(
-      {Key key,
-      this.title,
-      @required this.child,
-      @required this.onSave,
-      @required this.changed,
+      {Key? key,
+      required this.title,
+      required this.child,
+      required this.onSave,
+      required this.changed,
       this.hideSave = false,
       this.scrollController})
       : super(key: key);
@@ -20,7 +20,7 @@ class FormPage extends StatefulWidget {
   final String title;
   final Function onSave;
   final Widget child;
-  final ScrollController scrollController;
+  final ScrollController? scrollController;
 
   /// If you need the page to progress to a certain point before saving, control it here
   final bool hideSave;
@@ -90,11 +90,15 @@ class _FormPageState extends State<FormPage> {
       Utils.trailingSaveWidget(
         context,
         () {
-          if (!_formKey.currentState.validate()) {
+          if (_formKey.currentState == null) {
             return;
           }
 
-          _formKey.currentState.save();
+          if (!_formKey.currentState!.validate()) {
+            return;
+          }
+
+          _formKey.currentState!.save();
           widget.onSave();
         },
       )

lib/components/IPAndPortField.dart

@@ -8,13 +8,13 @@ import 'IPField.dart';
 //TODO: Support initialValue
 class IPAndPortField extends StatefulWidget {
   const IPAndPortField({
-    Key key,
+    Key? key,
     this.ipOnly = false,
     this.ipHelp = "ip address",
     this.autoFocus = false,
     this.focusNode,
     this.nextFocusNode,
-    this.onChanged,
+    required this.onChanged,
     this.textInputAction,
     this.noBorder = false,
     this.ipTextAlign,
@@ -25,14 +25,14 @@ class IPAndPortField extends StatefulWidget {
   final String ipHelp;
   final bool ipOnly;
   final bool autoFocus;
-  final FocusNode focusNode;
-  final FocusNode nextFocusNode;
+  final FocusNode? focusNode;
+  final FocusNode? nextFocusNode;
   final ValueChanged<IPAndPort> onChanged;
-  final TextInputAction textInputAction;
+  final TextInputAction? textInputAction;
   final bool noBorder;
-  final TextAlign ipTextAlign;
-  final TextEditingController ipController;
-  final TextEditingController portController;
+  final TextAlign? ipTextAlign;
+  final TextEditingController? ipController;
+  final TextEditingController? portController;
 
   @override
   _IPAndPortFieldState createState() => _IPAndPortFieldState();

lib/components/IPAndPortFormField.dart

@@ -8,17 +8,17 @@ import 'IPAndPortField.dart';
 class IPAndPortFormField extends FormField<IPAndPort> {
   //TODO: onSaved, validator, auto-validate, enabled?
   IPAndPortFormField({
-    Key key,
+    Key? key,
     ipOnly = false,
     enableIPV6 = false,
     ipHelp = "ip address",
     autoFocus = false,
     focusNode,
     nextFocusNode,
-    ValueChanged<IPAndPort> onChanged,
-    FormFieldSetter<IPAndPort> onSaved,
+    ValueChanged<IPAndPort>? onChanged,
+    FormFieldSetter<IPAndPort>? onSaved,
     textInputAction,
-    IPAndPort initialValue,
+    IPAndPort? initialValue,
     noBorder,
     ipTextAlign = TextAlign.center,
     this.ipController,
@@ -36,14 +36,14 @@ class IPAndPortFormField extends FormField<IPAndPort> {
                 return ipOnly ? 'Please enter a valid ip address' : 'Please enter a valid ip address or dns name';
               }
 
-              if (ipAndPort.port == null || ipAndPort.port > 65535 || ipAndPort.port < 0) {
+              if (ipAndPort.port == null || ipAndPort.port! > 65535 || ipAndPort.port! < 0) {
                 return "Please enter a valid port";
               }
 
               return null;
             },
             builder: (FormFieldState<IPAndPort> field) {
-              final _IPAndPortFormField state = field;
+              final _IPAndPortFormField state = field as _IPAndPortFormField;
 
               void onChangedHandler(IPAndPort value) {
                 if (onChanged != null) {
@@ -67,42 +67,42 @@ class IPAndPortFormField extends FormField<IPAndPort> {
                   ipTextAlign: ipTextAlign,
                 ),
                 field.hasError
-                    ? Text(field.errorText,
+                    ? Text(field.errorText!,
                         style: TextStyle(color: CupertinoColors.systemRed.resolveFrom(field.context), fontSize: 13))
                     : Container(height: 0)
               ]);
             });
 
-  final TextEditingController ipController;
-  final TextEditingController portController;
+  final TextEditingController? ipController;
+  final TextEditingController? portController;
 
   @override
   _IPAndPortFormField createState() => _IPAndPortFormField();
 }
 
 class _IPAndPortFormField extends FormFieldState<IPAndPort> {
-  TextEditingController _ipController;
-  TextEditingController _portController;
+  TextEditingController? _ipController;
+  TextEditingController? _portController;
 
-  TextEditingController get _effectiveIPController => widget.ipController ?? _ipController;
-  TextEditingController get _effectivePortController => widget.portController ?? _portController;
+  TextEditingController get _effectiveIPController => widget.ipController ?? _ipController!;
+  TextEditingController get _effectivePortController => widget.portController ?? _portController!;
 
   @override
-  IPAndPortFormField get widget => super.widget;
+  IPAndPortFormField get widget => super.widget as IPAndPortFormField;
 
   @override
   void initState() {
     super.initState();
     if (widget.ipController == null) {
-      _ipController = TextEditingController(text: widget.initialValue.ip);
+      _ipController = TextEditingController(text: widget.initialValue?.ip ?? "");
     } else {
-      widget.ipController.addListener(_handleControllerChanged);
+      widget.ipController!.addListener(_handleControllerChanged);
     }
 
     if (widget.portController == null) {
       _portController = TextEditingController(text: widget.initialValue?.port?.toString() ?? "");
     } else {
-      widget.portController.addListener(_handleControllerChanged);
+      widget.portController!.addListener(_handleControllerChanged);
     }
   }
 
@@ -118,12 +118,12 @@ class _IPAndPortFormField extends FormFieldState<IPAndPort> {
       widget.ipController?.addListener(_handleControllerChanged);
 
       if (oldWidget.ipController != null && widget.ipController == null) {
-        _ipController = TextEditingController.fromValue(oldWidget.ipController.value);
+        _ipController = TextEditingController.fromValue(oldWidget.ipController!.value);
       }
 
       if (widget.ipController != null) {
         shouldUpdate = true;
-        update.ip = widget.ipController.text;
+        update.ip = widget.ipController!.text;
         if (oldWidget.ipController == null) _ipController = null;
       }
     }
@@ -133,12 +133,12 @@ class _IPAndPortFormField extends FormFieldState<IPAndPort> {
       widget.portController?.addListener(_handleControllerChanged);
 
       if (oldWidget.portController != null && widget.portController == null) {
-        _portController = TextEditingController.fromValue(oldWidget.portController.value);
+        _portController = TextEditingController.fromValue(oldWidget.portController!.value);
       }
 
       if (widget.portController != null) {
         shouldUpdate = true;
-        update.port = int.parse(widget.portController.text);
+        update.port = int.parse(widget.portController!.text);
         if (oldWidget.portController == null) _portController = null;
       }
     }
@@ -159,8 +159,8 @@ class _IPAndPortFormField extends FormFieldState<IPAndPort> {
   void reset() {
     super.reset();
     setState(() {
-      _effectiveIPController.text = widget.initialValue.ip;
-      _effectivePortController.text = widget.initialValue.port.toString();
+      _effectiveIPController.text = widget.initialValue?.ip ?? "";
+      _effectivePortController.text = widget.initialValue?.port?.toString() ?? "";
     });
   }
 
@@ -173,7 +173,11 @@ class _IPAndPortFormField extends FormFieldState<IPAndPort> {
     // example, the reset() method. In such cases, the FormField value will
     // already have been set.
     final effectivePort = int.parse(_effectivePortController.text);
-    if (_effectiveIPController.text != value.ip || effectivePort != value.port) {
+    if (value == null) {
+      return;
+    }
+
+    if (_effectiveIPController.text != value!.ip || effectivePort != value!.port) {
       didChange(IPAndPort(ip: _effectiveIPController.text, port: effectivePort));
     }
   }

lib/components/IPField.dart

@@ -8,16 +8,16 @@ class IPField extends StatelessWidget {
   final String help;
   final bool ipOnly;
   final bool autoFocus;
-  final FocusNode focusNode;
-  final FocusNode nextFocusNode;
-  final ValueChanged<String> onChanged;
+  final FocusNode? focusNode;
+  final FocusNode? nextFocusNode;
+  final ValueChanged<String>? onChanged;
   final EdgeInsetsGeometry textPadding;
-  final TextInputAction textInputAction;
+  final TextInputAction? textInputAction;
   final controller;
   final textAlign;
 
   const IPField(
-      {Key key,
+      {Key? key,
       this.ipOnly = false,
       this.help = "ip address",
       this.autoFocus = false,
@@ -33,7 +33,7 @@ class IPField extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     var textStyle = CupertinoTheme.of(context).textTheme.textStyle;
-    final double ipWidth = ipOnly ? Utils.textSize("000000000000000", textStyle).width + 12 : null;
+    final double? ipWidth = ipOnly ? Utils.textSize("000000000000000", textStyle).width + 12 : null;
 
     return SizedBox(
         width: ipWidth,
@@ -64,7 +64,7 @@ class IPTextInputFormatter extends TextInputFormatter {
       (String substring) {
         return whitelistedPattern
             .allMatches(substring)
-            .map<String>((Match match) => match.group(0))
+            .map<String>((Match match) => match.group(0)!)
             .join()
             .replaceAll(RegExp(r','), '.');
       },
@@ -79,7 +79,7 @@ TextEditingValue _selectionAwareTextManipulation(
   final int selectionStartIndex = value.selection.start;
   final int selectionEndIndex = value.selection.end;
   String manipulatedText;
-  TextSelection manipulatedSelection;
+  TextSelection? manipulatedSelection;
   if (selectionStartIndex < 0 || selectionEndIndex < 0) {
     manipulatedText = substringManipulation(value.text);
   } else {

lib/components/IPFormField.dart

@@ -9,15 +9,15 @@ import 'IPField.dart';
 class IPFormField extends FormField<String> {
   //TODO: validator, auto-validate, enabled?
   IPFormField({
-    Key key,
+    Key? key,
     ipOnly = false,
     enableIPV6 = false,
     help = "ip address",
     autoFocus = false,
     focusNode,
     nextFocusNode,
-    ValueChanged<String> onChanged,
-    FormFieldSetter<String> onSaved,
+    ValueChanged<String>? onChanged,
+    FormFieldSetter<String>? onSaved,
     textPadding = const EdgeInsets.all(6.0),
     textInputAction,
     initialValue,
@@ -41,7 +41,7 @@ class IPFormField extends FormField<String> {
               return null;
             },
             builder: (FormFieldState<String> field) {
-              final _IPFormField state = field;
+              final _IPFormField state = field as _IPFormField;
 
               void onChangedHandler(String value) {
                 if (onChanged != null) {
@@ -64,7 +64,7 @@ class IPFormField extends FormField<String> {
                     textAlign: textAlign),
                 field.hasError
                     ? Text(
-                        field.errorText,
+                        field.errorText!,
                         style: TextStyle(color: CupertinoColors.systemRed.resolveFrom(field.context), fontSize: 13),
                         textAlign: textAlign,
                       )
@@ -72,19 +72,19 @@ class IPFormField extends FormField<String> {
               ]);
             });
 
-  final TextEditingController controller;
+  final TextEditingController? controller;
 
   @override
   _IPFormField createState() => _IPFormField();
 }
 
 class _IPFormField extends FormFieldState<String> {
-  TextEditingController _controller;
+  TextEditingController? _controller;
 
-  TextEditingController get _effectiveController => widget.controller ?? _controller;
+  TextEditingController get _effectiveController => widget.controller ?? _controller!;
 
   @override
-  IPFormField get widget => super.widget;
+  IPFormField get widget => super.widget as IPFormField;
 
   @override
   void initState() {
@@ -92,7 +92,7 @@ class _IPFormField extends FormFieldState<String> {
     if (widget.controller == null) {
       _controller = TextEditingController(text: widget.initialValue);
     } else {
-      widget.controller.addListener(_handleControllerChanged);
+      widget.controller!.addListener(_handleControllerChanged);
     }
   }
 
@@ -104,9 +104,9 @@ class _IPFormField extends FormFieldState<String> {
       widget.controller?.addListener(_handleControllerChanged);
 
       if (oldWidget.controller != null && widget.controller == null)
-        _controller = TextEditingController.fromValue(oldWidget.controller.value);
+        _controller = TextEditingController.fromValue(oldWidget.controller!.value);
       if (widget.controller != null) {
-        setValue(widget.controller.text);
+        setValue(widget.controller!.text);
         if (oldWidget.controller == null) _controller = null;
       }
     }
@@ -122,7 +122,7 @@ class _IPFormField extends FormFieldState<String> {
   void reset() {
     super.reset();
     setState(() {
-      _effectiveController.text = widget.initialValue;
+      _effectiveController.text = widget.initialValue ?? "";
     });
   }
 

lib/components/PlatformTextFormField.dart

@@ -6,14 +6,14 @@ import 'package:mobile_nebula/components/SpecialTextField.dart';
 class PlatformTextFormField extends FormField<String> {
   //TODO: auto-validate, enabled?
   PlatformTextFormField(
-      {Key key,
+      {Key? key,
       widgetKey,
       this.controller,
       focusNode,
       nextFocusNode,
-      TextInputType keyboardType,
+      TextInputType? keyboardType,
       textInputAction,
-      List<TextInputFormatter> inputFormatters,
+      List<TextInputFormatter>? inputFormatters,
       textAlign,
       autofocus,
       maxLines = 1,
@@ -25,10 +25,10 @@ class PlatformTextFormField extends FormField<String> {
       expands,
       suffix,
       textAlignVertical,
-      String initialValue,
-      String placeholder,
-      FormFieldValidator<String> validator,
-      ValueChanged<String> onSaved})
+      String? initialValue,
+      String? placeholder,
+      FormFieldValidator<String>? validator,
+      ValueChanged<String?>? onSaved})
       : super(
             key: key,
             initialValue: controller != null ? controller.text : (initialValue ?? ''),
@@ -41,7 +41,7 @@ class PlatformTextFormField extends FormField<String> {
               return null;
             },
             builder: (FormFieldState<String> field) {
-              final _PlatformTextFormFieldState state = field;
+              final _PlatformTextFormFieldState state = field as _PlatformTextFormFieldState;
 
               void onChangedHandler(String value) {
                 if (onChanged != null) {
@@ -73,7 +73,7 @@ class PlatformTextFormField extends FormField<String> {
                     suffix: suffix),
                 field.hasError
                     ? Text(
-                        field.errorText,
+                        field.errorText!,
                         style: TextStyle(color: CupertinoColors.systemRed.resolveFrom(field.context), fontSize: 13),
                         textAlign: textAlign,
                       )
@@ -81,19 +81,19 @@ class PlatformTextFormField extends FormField<String> {
               ]);
             });
 
-  final TextEditingController controller;
+  final TextEditingController? controller;
 
   @override
   _PlatformTextFormFieldState createState() => _PlatformTextFormFieldState();
 }
 
 class _PlatformTextFormFieldState extends FormFieldState<String> {
-  TextEditingController _controller;
+  TextEditingController? _controller;
 
-  TextEditingController get _effectiveController => widget.controller ?? _controller;
+  TextEditingController get _effectiveController => widget.controller ?? _controller!;
 
   @override
-  PlatformTextFormField get widget => super.widget;
+  PlatformTextFormField get widget => super.widget as PlatformTextFormField;
 
   @override
   void initState() {
@@ -101,7 +101,7 @@ class _PlatformTextFormFieldState extends FormFieldState<String> {
     if (widget.controller == null) {
       _controller = TextEditingController(text: widget.initialValue);
     } else {
-      widget.controller.addListener(_handleControllerChanged);
+      widget.controller!.addListener(_handleControllerChanged);
     }
   }
 
@@ -113,9 +113,9 @@ class _PlatformTextFormFieldState extends FormFieldState<String> {
       widget.controller?.addListener(_handleControllerChanged);
 
       if (oldWidget.controller != null && widget.controller == null)
-        _controller = TextEditingController.fromValue(oldWidget.controller.value);
+        _controller = TextEditingController.fromValue(oldWidget.controller!.value);
       if (widget.controller != null) {
-        setValue(widget.controller.text);
+        setValue(widget.controller!.text);
         if (oldWidget.controller == null) _controller = null;
       }
     }
@@ -131,7 +131,7 @@ class _PlatformTextFormFieldState extends FormFieldState<String> {
   void reset() {
     super.reset();
     setState(() {
-      _effectiveController.text = widget.initialValue;
+      _effectiveController.text = widget.initialValue ?? "";
     });
   }
 

lib/components/SimplePage.dart

@@ -13,9 +13,9 @@ enum SimpleScrollable {
 
 class SimplePage extends StatelessWidget {
   const SimplePage(
-      {Key key,
-      this.title,
-      @required this.child,
+      {Key? key,
+      required this.title,
+      required this.child,
       this.leadingAction,
       this.trailingActions = const [],
       this.scrollable = SimpleScrollable.vertical,
@@ -30,20 +30,20 @@ class SimplePage extends StatelessWidget {
   final String title;
   final Widget child;
   final SimpleScrollable scrollable;
-  final ScrollController scrollController;
+  final ScrollController? scrollController;
 
   /// Set this to true to force draw a scrollbar without a scroll view, this is helpful for pages with Reorder-able listviews
   /// This is set to true if you have any scrollable other than none
   final bool scrollbar;
-  final Widget bottomBar;
+  final Widget? bottomBar;
 
   /// If no leading action is provided then a default "Back" widget than pops the page will be provided
-  final Widget leadingAction;
+  final Widget? leadingAction;
   final List<Widget> trailingActions;
 
-  final VoidCallback onRefresh;
-  final VoidCallback onLoading;
-  final RefreshController refreshController;
+  final VoidCallback? onRefresh;
+  final VoidCallback? onLoading;
+  final RefreshController? refreshController;
 
   @override
   Widget build(BuildContext context) {
@@ -72,7 +72,7 @@ class SimplePage extends StatelessWidget {
             scrollController: scrollController,
             onRefresh: onRefresh,
             onLoading: onLoading,
-            controller: refreshController,
+            controller: refreshController!,
             child: realChild,
             enablePullUp: onLoading != null,
             enablePullDown: onRefresh != null,
@@ -88,7 +88,7 @@ class SimplePage extends StatelessWidget {
     if (bottomBar != null) {
       realChild = Column(children: [
         Expanded(child: realChild),
-        bottomBar,
+        bottomBar!,
       ]);
     }
 

lib/components/SiteItem.dart

@@ -4,7 +4,7 @@ import 'package:mobile_nebula/models/Site.dart';
 import 'package:mobile_nebula/services/utils.dart';
 
 class SiteItem extends StatelessWidget {
-  const SiteItem({Key key, this.site, this.onPressed}) : super(key: key);
+  const SiteItem({Key? key, required this.site, this.onPressed}) : super(key: key);
 
   final Site site;
   final onPressed;
@@ -27,8 +27,8 @@ class SiteItem extends StatelessWidget {
   Widget _buildContent(BuildContext context) {
     final border = BorderSide(color: Utils.configSectionBorder(context));
     var ip = "Error";
-    if (site.certInfo != null && site.certInfo.cert.details.ips.length > 0) {
-      ip = site.certInfo.cert.details.ips[0];
+    if (site.certInfo != null && site.certInfo!.cert.details.ips.length > 0) {
+      ip = site.certInfo!.cert.details.ips[0];
     }
 
     return SpecialButton(

lib/components/SpecialButton.dart

@@ -5,15 +5,15 @@ import 'package:flutter/material.dart';
 
 // This is a button that pushes the bare minimum onto you, it doesn't even respect button themes - unless you tell it to
 class SpecialButton extends StatefulWidget {
-  const SpecialButton({Key key, this.child, this.color, this.onPressed, this.useButtonTheme = false, this.decoration})
+  const SpecialButton({Key? key, this.child, this.color, this.onPressed, this.useButtonTheme = false, this.decoration})
       : super(key: key);
 
-  final Widget child;
-  final Color color;
+  final Widget? child;
+  final Color? color;
   final bool useButtonTheme;
-  final BoxDecoration decoration;
+  final BoxDecoration? decoration;
 
-  final Function onPressed;
+  final GestureTapCallback? onPressed;
 
   @override
   _SpecialButtonState createState() => _SpecialButtonState();
@@ -59,7 +59,7 @@ class _SpecialButtonState extends State<SpecialButton> with SingleTickerProvider
           child: Semantics(
             button: true,
             child: FadeTransition(
-              opacity: _opacityAnimation,
+              opacity: _opacityAnimation!,
               child: DefaultTextStyle(style: textStyle, child: Container(child: widget.child, color: widget.color)),
             ),
           ),
@@ -71,8 +71,8 @@ class _SpecialButtonState extends State<SpecialButton> with SingleTickerProvider
   static const Duration kFadeInDuration = Duration(milliseconds: 100);
   final Tween<double> _opacityTween = Tween<double>(begin: 1.0);
 
-  AnimationController _animationController;
-  Animation<double> _opacityAnimation;
+  AnimationController? _animationController;
+  Animation<double>? _opacityAnimation;
 
   @override
   void initState() {
@@ -82,7 +82,7 @@ class _SpecialButtonState extends State<SpecialButton> with SingleTickerProvider
       value: 0.0,
       vsync: this,
     );
-    _opacityAnimation = _animationController.drive(CurveTween(curve: Curves.decelerate)).drive(_opacityTween);
+    _opacityAnimation = _animationController!.drive(CurveTween(curve: Curves.decelerate)).drive(_opacityTween);
     _setTween();
   }
 
@@ -98,8 +98,7 @@ class _SpecialButtonState extends State<SpecialButton> with SingleTickerProvider
 
   @override
   void dispose() {
-    _animationController.dispose();
-    _animationController = null;
+    _animationController?.dispose();
     super.dispose();
   }
 
@@ -127,14 +126,14 @@ class _SpecialButtonState extends State<SpecialButton> with SingleTickerProvider
   }
 
   void _animate() {
-    if (_animationController.isAnimating) {
+    if (_animationController == null || _animationController!.isAnimating) {
       return;
     }
 
     final bool wasHeldDown = _buttonHeldDown;
     final TickerFuture ticker = _buttonHeldDown
-        ? _animationController.animateTo(1.0, duration: kFadeOutDuration)
-        : _animationController.animateTo(0.0, duration: kFadeInDuration);
+        ? _animationController!.animateTo(1.0, duration: kFadeOutDuration)
+        : _animationController!.animateTo(0.0, duration: kFadeInDuration);
 
     ticker.then<void>((void value) {
       if (mounted && wasHeldDown != _buttonHeldDown) {

lib/components/SpecialTextField.dart

@@ -5,7 +5,7 @@ import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 /// A normal TextField or CupertinoTextField that looks the same on all platforms
 class SpecialTextField extends StatefulWidget {
   const SpecialTextField(
-      {Key key,
+      {Key? key,
       this.placeholder,
       this.suffix,
       this.controller,
@@ -30,43 +30,44 @@ class SpecialTextField extends StatefulWidget {
       this.inputFormatters})
       : super(key: key);
 
-  final String placeholder;
-  final TextEditingController controller;
-  final FocusNode focusNode;
-  final FocusNode nextFocusNode;
-  final bool autocorrect;
-  final int minLines;
-  final int maxLines;
-  final int maxLength;
-  final MaxLengthEnforcement maxLengthEnforcement;
-  final Widget suffix;
-  final TextStyle style;
-  final TextInputType keyboardType;
-  final Brightness keyboardAppearance;
+  final String? placeholder;
+  final TextEditingController? controller;
+  final FocusNode? focusNode;
+  final FocusNode? nextFocusNode;
+  final bool? autocorrect;
+  final int? minLines;
+  final int? maxLines;
+  final int? maxLength;
+  final MaxLengthEnforcement? maxLengthEnforcement;
+  final Widget? suffix;
+  final TextStyle? style;
+  final TextInputType? keyboardType;
+  final Brightness? keyboardAppearance;
 
-  final TextInputAction textInputAction;
-  final TextCapitalization textCapitalization;
-  final TextAlign textAlign;
-  final TextAlignVertical textAlignVertical;
+  final TextInputAction? textInputAction;
+  final TextCapitalization? textCapitalization;
+  final TextAlign? textAlign;
+  final TextAlignVertical? textAlignVertical;
 
-  final bool autofocus;
-  final ValueChanged<String> onChanged;
-  final bool enabled;
-  final List<TextInputFormatter> inputFormatters;
-  final bool expands;
+  final bool? autofocus;
+  final ValueChanged<String>? onChanged;
+  final bool? enabled;
+  final List<TextInputFormatter>? inputFormatters;
+  final bool? expands;
 
   @override
   _SpecialTextFieldState createState() => _SpecialTextFieldState();
 }
 
 class _SpecialTextFieldState extends State<SpecialTextField> {
-  List<TextInputFormatter> formatters;
+  List<TextInputFormatter> formatters = [];
 
   @override
   void initState() {
-    formatters = widget.inputFormatters;
-    if (formatters == null || formatters.length == 0) {
+    if (widget.inputFormatters == null || formatters.length == 0) {
       formatters = [FilteringTextInputFormatter.allow(RegExp(r'[^\t]'))];
+    } else {
+      formatters = widget.inputFormatters!;
     }
 
     super.initState();

lib/components/config/ConfigButtonItem.dart

@@ -5,9 +5,9 @@ import 'package:mobile_nebula/services/utils.dart';
 
 // A config item that detects tapping and calls back on a tap
 class ConfigButtonItem extends StatelessWidget {
-  const ConfigButtonItem({Key key, this.content, this.onPressed}) : super(key: key);
+  const ConfigButtonItem({Key? key, this.content, this.onPressed}) : super(key: key);
 
-  final Widget content;
+  final Widget? content;
   final onPressed;
 
   @override

lib/components/config/ConfigCheckboxItem.dart

@@ -3,14 +3,15 @@ import 'package:mobile_nebula/components/SpecialButton.dart';
 import 'package:mobile_nebula/services/utils.dart';
 
 class ConfigCheckboxItem extends StatelessWidget {
-  const ConfigCheckboxItem({Key key, this.label, this.content, this.labelWidth = 100, this.onChanged, this.checked})
+  const ConfigCheckboxItem(
+      {Key? key, this.label, this.content, this.labelWidth = 100, this.onChanged, this.checked = false})
       : super(key: key);
 
-  final Widget label;
-  final Widget content;
+  final Widget? label;
+  final Widget? content;
   final double labelWidth;
   final bool checked;
-  final Function onChanged;
+  final Function? onChanged;
 
   @override
   Widget build(BuildContext context) {
@@ -34,7 +35,7 @@ class ConfigCheckboxItem extends StatelessWidget {
         child: item,
         onPressed: () {
           if (onChanged != null) {
-            onChanged();
+            onChanged!();
           }
         },
       );

lib/components/config/ConfigHeader.dart

@@ -4,15 +4,15 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 TextStyle basicTextStyle(BuildContext context) =>
-    Platform.isIOS ? CupertinoTheme.of(context).textTheme.textStyle : Theme.of(context).textTheme.subtitle1;
+    Platform.isIOS ? CupertinoTheme.of(context).textTheme.textStyle : Theme.of(context).textTheme.subtitle1!;
 
 const double _headerFontSize = 13.0;
 
 class ConfigHeader extends StatelessWidget {
-  const ConfigHeader({Key key, this.label, this.color}) : super(key: key);
+  const ConfigHeader({Key? key, required this.label, this.color}) : super(key: key);
 
   final String label;
-  final Color color;
+  final Color? color;
 
   @override
   Widget build(BuildContext context) {

lib/components/config/ConfigItem.dart

@@ -4,10 +4,14 @@ import 'package:mobile_nebula/services/utils.dart';
 
 class ConfigItem extends StatelessWidget {
   const ConfigItem(
-      {Key key, this.label, this.content, this.labelWidth = 100, this.crossAxisAlignment = CrossAxisAlignment.center})
+      {Key? key,
+      this.label,
+      required this.content,
+      this.labelWidth = 100,
+      this.crossAxisAlignment = CrossAxisAlignment.center})
       : super(key: key);
 
-  final Widget label;
+  final Widget? label;
   final Widget content;
   final double labelWidth;
   final CrossAxisAlignment crossAxisAlignment;

lib/components/config/ConfigPageItem.dart

@@ -7,7 +7,7 @@ import 'package:mobile_nebula/services/utils.dart';
 
 class ConfigPageItem extends StatelessWidget {
   const ConfigPageItem(
-      {Key key,
+      {Key? key,
       this.label,
       this.content,
       this.labelWidth = 100,
@@ -15,8 +15,8 @@ class ConfigPageItem extends StatelessWidget {
       this.crossAxisAlignment = CrossAxisAlignment.center})
       : super(key: key);
 
-  final Widget label;
-  final Widget content;
+  final Widget? label;
+  final Widget? content;
   final double labelWidth;
   final CrossAxisAlignment crossAxisAlignment;
   final onPressed;
@@ -28,8 +28,8 @@ class ConfigPageItem extends StatelessWidget {
     if (Platform.isAndroid) {
       final origTheme = Theme.of(context);
       theme = origTheme.copyWith(
-          textTheme:
-              origTheme.textTheme.copyWith(button: origTheme.textTheme.button.copyWith(fontWeight: FontWeight.normal)));
+          textTheme: origTheme.textTheme
+              .copyWith(button: origTheme.textTheme.button!.copyWith(fontWeight: FontWeight.normal)));
       return Theme(data: theme, child: _buildContent(context));
     } else {
       final origTheme = CupertinoTheme.of(context);

lib/components/config/ConfigSection.dart

@@ -4,12 +4,13 @@ import 'package:mobile_nebula/services/utils.dart';
 import 'ConfigHeader.dart';
 
 class ConfigSection extends StatelessWidget {
-  const ConfigSection({Key key, this.label, this.children, this.borderColor, this.labelColor}) : super(key: key);
+  const ConfigSection({Key? key, this.label, required this.children, this.borderColor, this.labelColor})
+      : super(key: key);
 
   final List<Widget> children;
-  final String label;
-  final Color borderColor;
-  final Color labelColor;
+  final String? label;
+  final Color? borderColor;
+  final Color? labelColor;
 
   @override
   Widget build(BuildContext context) {
@@ -32,7 +33,7 @@ class ConfigSection extends StatelessWidget {
     }
 
     return Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-      label != null ? ConfigHeader(label: label, color: labelColor) : Container(height: 20),
+      label != null ? ConfigHeader(label: label!, color: labelColor) : Container(height: 20),
       Container(
           decoration:
               BoxDecoration(border: Border(top: border, bottom: border), color: Utils.configItemBackground(context)),

lib/components/config/ConfigTextItem.dart

@@ -5,10 +5,12 @@ import 'package:flutter/material.dart';
 import 'package:mobile_nebula/components/SpecialTextField.dart';
 
 class ConfigTextItem extends StatelessWidget {
-  const ConfigTextItem({Key key, this.placeholder, this.controller, this.style = const TextStyle(fontFamily: 'RobotoMono')}) : super(key: key);
+  const ConfigTextItem(
+      {Key? key, this.placeholder, this.controller, this.style = const TextStyle(fontFamily: 'RobotoMono')})
+      : super(key: key);
 
-  final String placeholder;
-  final TextEditingController controller;
+  final String? placeholder;
+  final TextEditingController? controller;
   final TextStyle style;
 
   @override

lib/models/CIDR.dart

@@ -1,5 +1,5 @@
 class CIDR {
-  CIDR({this.ip, this.bits});
+  CIDR({this.ip = '', this.bits = 0});
 
   String ip;
   int bits;
@@ -13,13 +13,15 @@ class CIDR {
     return toString();
   }
 
-  CIDR.fromString(String val) {
+  factory CIDR.fromString(String val) {
     final parts = val.split('/');
     if (parts.length != 2) {
       throw 'Invalid CIDR string';
     }
 
-    ip = parts[0];
-    bits = int.parse(parts[1]);
+    return CIDR(
+      ip: parts[0],
+      bits: int.parse(parts[1]),
+    );
   }
 }

lib/models/Certificate.dart

@@ -1,7 +1,7 @@
 class CertificateInfo {
   Certificate cert;
-  String rawCert;
-  CertificateValidity validity;
+  String? rawCert;
+  CertificateValidity? validity;
 
   CertificateInfo.debug({this.rawCert = ""})
       : this.cert = Certificate.debug(),
@@ -12,10 +12,10 @@ class CertificateInfo {
         rawCert = json['RawCert'],
         validity = CertificateValidity.fromJson(json['Validity']);
 
-  CertificateInfo({this.cert, this.rawCert, this.validity});
+  CertificateInfo({required this.cert, this.rawCert, this.validity});
 
   static List<CertificateInfo> fromJsonList(List<dynamic> list) {
-    return list.map((v) => CertificateInfo.fromJson(v));
+    return list.map((v) => CertificateInfo.fromJson(v)).toList();
   }
 }
 
@@ -59,8 +59,8 @@ class CertificateDetails {
 
   CertificateDetails.fromJson(Map<String, dynamic> json)
       : name = json['name'],
-        notBefore = DateTime.tryParse(json['notBefore']),
-        notAfter = DateTime.tryParse(json['notAfter']),
+        notBefore = DateTime.parse(json['notBefore']),
+        notAfter = DateTime.parse(json['notAfter']),
         publicKey = json['publicKey'],
         groups = List<String>.from(json['groups']),
         ips = List<String>.from(json['ips']),

lib/models/HostInfo.dart

@@ -6,31 +6,48 @@ class HostInfo {
   int remoteIndex;
   List<UDPAddress> remoteAddresses;
   int cachedPackets;
-  Certificate cert;
-  UDPAddress currentRemote;
+  Certificate? cert;
+  UDPAddress? currentRemote;
   int messageCounter;
 
-  HostInfo.fromJson(Map<String, dynamic> json) {
-    vpnIp = json['vpnIp'];
-    localIndex = json['localIndex'];
-    remoteIndex = json['remoteIndex'];
-    cachedPackets = json['cachedPackets'];
+  HostInfo({
+    required this.vpnIp,
+    required this.localIndex,
+    required this.remoteIndex,
+    required this.remoteAddresses,
+    required this.cachedPackets,
+    required this.messageCounter,
+    this.cert,
+    this.currentRemote,
+  });
 
+  factory HostInfo.fromJson(Map<String, dynamic> json) {
+    UDPAddress? currentRemote;
     if (json['currentRemote'] != null) {
       currentRemote = UDPAddress.fromJson(json['currentRemote']);
     }
 
+    Certificate? cert;
     if (json['cert'] != null) {
       cert = Certificate.fromJson(json['cert']);
     }
 
     List<dynamic> addrs = json['remoteAddrs'];
-    remoteAddresses = [];
-    addrs?.forEach((val) {
+    List<UDPAddress> remoteAddresses = [];
+    addrs.forEach((val) {
       remoteAddresses.add(UDPAddress.fromJson(val));
     });
 
-    messageCounter = json['messageCounter'];
+    return HostInfo(
+      vpnIp: json['vpnIp'],
+      localIndex: json['localIndex'],
+      remoteIndex: json['remoteIndex'],
+      remoteAddresses: remoteAddresses,
+      cachedPackets: json['cachedPackets'],
+      messageCounter: json['messageCounter'],
+      cert: cert,
+      currentRemote: currentRemote,
+    );
   }
 }
 

lib/models/Hostmap.dart

@@ -5,5 +5,5 @@ class Hostmap {
   List<IPAndPort> destinations;
   bool lighthouse;
 
-  Hostmap({this.nebulaIp, this.destinations, this.lighthouse});
+  Hostmap({required this.nebulaIp, required this.destinations, required this.lighthouse});
 }

lib/models/IPAndPort.dart

@@ -1,12 +1,12 @@
 class IPAndPort {
-  String ip;
-  int port;
+  String? ip;
+  int? port;
 
   IPAndPort({this.ip, this.port});
 
   @override
   String toString() {
-    if (ip.contains(':')) {
+    if (ip != null && ip!.contains(':')) {
       return '[$ip]:$port';
     }
 
@@ -17,10 +17,13 @@ class IPAndPort {
     return toString();
   }
 
-  IPAndPort.fromString(String val) {
+  factory IPAndPort.fromString(String val) {
     //TODO: Uri.parse is as close as I could get to parsing both ipv4 and v6 addresses with a port without bringing a whole mess of code into here
     final uri = Uri.parse("ugh://$val");
-    this.ip = uri.host;
-    this.port = uri.port;
+
+    return IPAndPort(
+      ip: uri.host,
+      port: uri.port,
+    );
   }
 }

lib/models/Site.dart

@@ -12,107 +12,75 @@ var uuid = Uuid();
 
 class Site {
   static const platform = MethodChannel('net.defined.mobileNebula/NebulaVpnService');
-  EventChannel _updates;
+  late EventChannel _updates;
 
   /// Signals that something about this site has changed. onError is called with an error string if there was an error
   StreamController _change = StreamController.broadcast();
 
   // Identifiers
-  String name;
-  String id;
+  late String name;
+  late String id;
 
   // static_host_map
-  Map<String, StaticHost> staticHostmap;
-  List<UnsafeRoute> unsafeRoutes;
+  late Map<String, StaticHost> staticHostmap;
+  late List<UnsafeRoute> unsafeRoutes;
 
   // pki fields
-  List<CertificateInfo> ca;
-  CertificateInfo certInfo;
-  String key;
+  late List<CertificateInfo> ca;
+  String? key;
+  late CertificateInfo? certInfo;
 
   // lighthouse options
-  int lhDuration; // in seconds
+  late int lhDuration; // in seconds
 
   // listen settings
-  int port;
-  int mtu;
+  late int port;
+  late int mtu;
 
-  String cipher;
-  int sortKey;
-  bool connected;
-  String status;
-  String logFile;
-  String logVerbosity;
+  late String cipher;
+  late int sortKey;
+  late bool connected;
+  late String status;
+  late String logFile;
+  late String logVerbosity;
 
   // A list of errors encountered while loading the site
-  List<String> errors;
+  late List<String> errors;
 
-  Site(
-      {this.name,
-      id,
-      staticHostmap,
-      ca,
-      this.certInfo,
-      this.lhDuration = 0,
-      this.port = 0,
-      this.cipher = "aes",
-      this.sortKey,
-      this.mtu = 1300,
-      this.connected,
-      this.status,
-      this.logFile,
-      this.logVerbosity = 'info',
-      errors,
-      unsafeRoutes})
-      : staticHostmap = staticHostmap ?? {},
-        unsafeRoutes = unsafeRoutes ?? [],
-        errors = errors ?? [],
-        ca = ca ?? [],
-        id = id ?? uuid.v4();
-
-  Site.fromJson(Map<String, dynamic> json) {
-    name = json['name'];
-    id = json['id'];
-
-    Map<String, dynamic> rawHostmap = json['staticHostmap'];
-    staticHostmap = {};
-    rawHostmap.forEach((key, val) {
-      staticHostmap[key] = StaticHost.fromJson(val);
-    });
-
-    List<dynamic> rawUnsafeRoutes = json['unsafeRoutes'];
-    unsafeRoutes = [];
-    if (rawUnsafeRoutes != null) {
-      rawUnsafeRoutes.forEach((val) {
-        unsafeRoutes.add(UnsafeRoute.fromJson(val));
-      });
-    }
-
-    List<dynamic> rawCA = json['ca'];
-    ca = [];
-    rawCA.forEach((val) {
-      ca.add(CertificateInfo.fromJson(val));
-    });
-
-    if (json['cert'] != null) {
-      certInfo = CertificateInfo.fromJson(json['cert']);
-    }
-
-    lhDuration = json['lhDuration'];
-    port = json['port'];
-    mtu = json['mtu'];
-    cipher = json['cipher'];
-    sortKey = json['sortKey'];
-    logFile = json['logFile'];
-    logVerbosity = json['logVerbosity'];
-    connected = json['connected'] ?? false;
-    status = json['status'] ?? "";
-
-    errors = [];
-    List<dynamic> rawErrors = json["errors"];
-    rawErrors.forEach((error) {
-      errors.add(error);
-    });
+  Site({
+    String name = '',
+    String? id,
+    Map<String, StaticHost>? staticHostmap,
+    List<CertificateInfo>? ca,
+    CertificateInfo? certInfo,
+    int lhDuration = 0,
+    int port = 0,
+    String cipher = "aes",
+    int sortKey = 0,
+    int mtu = 1300,
+    bool connected = false,
+    String status = '',
+    String logFile = '',
+    String logVerbosity = 'info',
+    List<String>? errors,
+    List<UnsafeRoute>? unsafeRoutes,
+  }) {
+    this.name = name;
+    this.id = id ?? uuid.v4();
+    this.staticHostmap = staticHostmap ?? {};
+    this.ca = ca ?? [];
+    this.certInfo = certInfo;
+    this.lhDuration = lhDuration;
+    this.port = port;
+    this.cipher = cipher;
+    this.sortKey = sortKey;
+    this.mtu = mtu;
+    this.connected = connected;
+    this.status = status;
+    this.logFile = logFile;
+    this.logVerbosity = logVerbosity;
+    this.errors = errors ?? [];
+    this.unsafeRoutes = unsafeRoutes ?? [];
 
     _updates = EventChannel('net.defined.nebula/$id');
     _updates.receiveBroadcastStream().listen((d) {
@@ -128,10 +96,60 @@ class Site {
       var error = err as PlatformException;
       this.status = error.details['status'];
       this.connected = error.details['connected'];
-      _change.addError(error.message);
+      _change.addError(error.message ?? 'An unexpected error occurred');
     });
   }
 
+  factory Site.fromJson(Map<String, dynamic> json) {
+    Map<String, dynamic> rawHostmap = json['staticHostmap'];
+    Map<String, StaticHost> staticHostmap = {};
+    rawHostmap.forEach((key, val) {
+      staticHostmap[key] = StaticHost.fromJson(val);
+    });
+
+    List<dynamic> rawUnsafeRoutes = json['unsafeRoutes'];
+    List<UnsafeRoute> unsafeRoutes = [];
+    rawUnsafeRoutes.forEach((val) {
+      unsafeRoutes.add(UnsafeRoute.fromJson(val));
+    });
+
+    List<dynamic> rawCA = json['ca'];
+    List<CertificateInfo> ca = [];
+    rawCA.forEach((val) {
+      ca.add(CertificateInfo.fromJson(val));
+    });
+
+    CertificateInfo? certInfo;
+    if (json['cert'] != null) {
+      certInfo = CertificateInfo.fromJson(json['cert']);
+    }
+
+    List<dynamic> rawErrors = json["errors"];
+    List<String> errors = [];
+    rawErrors.forEach((error) {
+      errors.add(error);
+    });
+
+    return Site(
+      name: json['name'],
+      id: json['id'],
+      staticHostmap: staticHostmap,
+      ca: ca,
+      certInfo: certInfo,
+      lhDuration: json['lhDuration'],
+      port: json['port'],
+      cipher: json['cipher'],
+      sortKey: json['sortKey'],
+      mtu: json['mtu'],
+      connected: json['connected'] ?? false,
+      status: json['status'] ?? "",
+      logFile: json['logFile'],
+      logVerbosity: json['logVerbosity'],
+      errors: errors,
+      unsafeRoutes: unsafeRoutes,
+    );
+  }
+
   Stream onChange() {
     return _change.stream;
   }
@@ -142,10 +160,9 @@ class Site {
       'id': id,
       'staticHostmap': staticHostmap,
       'unsafeRoutes': unsafeRoutes,
-      'ca': ca?.map((cert) {
+      'ca': ca.map((cert) {
         return cert.rawCert;
-          })?.join('\n') ??
-          "",
+      }).join('\n'),
       'cert': certInfo?.rawCert,
       'key': key,
       'lhDuration': lhDuration,
@@ -260,7 +277,7 @@ class Site {
     _change.close();
   }
 
-  Future<HostInfo> getHostInfo(String vpnIp, bool pending) async {
+  Future<HostInfo?> getHostInfo(String vpnIp, bool pending) async {
     try {
       var ret = await platform
           .invokeMethod("active.getHostInfo", <String, dynamic>{"id": id, "vpnIp": vpnIp, "pending": pending});
@@ -277,7 +294,7 @@ class Site {
     }
   }
 
-  Future<HostInfo> setRemoteForTunnel(String vpnIp, String addr) async {
+  Future<HostInfo?> setRemoteForTunnel(String vpnIp, String addr) async {
     try {
       var ret = await platform
           .invokeMethod("active.setRemoteForTunnel", <String, dynamic>{"id": id, "vpnIp": vpnIp, "addr": addr});

lib/models/StaticHosts.dart

@@ -4,11 +4,9 @@ class StaticHost {
   bool lighthouse;
   List<IPAndPort> destinations;
 
-  StaticHost({this.lighthouse, this.destinations});
-
-  StaticHost.fromJson(Map<String, dynamic> json) {
-    lighthouse = json['lighthouse'];
+  StaticHost({required this.lighthouse, required this.destinations});
 
+  factory StaticHost.fromJson(Map<String, dynamic> json) {
     var list = json['destinations'] as List<dynamic>;
     var result = <IPAndPort>[];
 
@@ -16,7 +14,10 @@ class StaticHost {
       result.add(IPAndPort.fromString(item));
     });
 
-    destinations = result;
+    return StaticHost(
+      lighthouse: json['lighthouse'],
+      destinations: result,
+    );
   }
 
   Map<String, dynamic> toJson() {

lib/models/UnsafeRoute.dart

@@ -1,12 +1,14 @@
 class UnsafeRoute {
-  String route;
-  String via;
+  String? route;
+  String? via;
 
   UnsafeRoute({this.route, this.via});
 
-  UnsafeRoute.fromJson(Map<String, dynamic> json) {
-    route = json['route'];
-    via = json['via'];
+  factory UnsafeRoute.fromJson(Map<String, dynamic> json) {
+    return UnsafeRoute(
+      route: json['route'],
+      via: json['via'],
+    );
   }
 
   Map<String, dynamic> toJson() {

lib/screens/AboutScreen.dart

@@ -9,7 +9,7 @@ import 'package:mobile_nebula/services/utils.dart';
 import 'package:package_info/package_info.dart';
 
 class AboutScreen extends StatefulWidget {
-  const AboutScreen({Key key}) : super(key: key);
+  const AboutScreen({Key? key}) : super(key: key);
 
   @override
   _AboutScreenState createState() => _AboutScreenState();
@@ -17,7 +17,7 @@ class AboutScreen extends StatefulWidget {
 
 class _AboutScreenState extends State<AboutScreen> {
   bool ready = false;
-  PackageInfo packageInfo;
+  PackageInfo? packageInfo;
 
   @override
   void initState() {
@@ -33,6 +33,7 @@ class _AboutScreenState extends State<AboutScreen> {
 
   @override
   Widget build(BuildContext context) {
+    // packageInfo is null until ready is true
     if (!ready) {
       return Center(
         child: PlatformCircularProgressIndicator(cupertino: (_, __) {
@@ -48,13 +49,17 @@ class _AboutScreenState extends State<AboutScreen> {
           ConfigItem(
               label: Text('App version'),
               labelWidth: 150,
-              content: _buildText('${packageInfo.version}-${packageInfo.buildNumber} (sha: $gitSha)')),
+              content: _buildText('${packageInfo!.version}-${packageInfo!.buildNumber} (sha: $gitSha)')),
           ConfigItem(
               label: Text('Nebula version'), labelWidth: 150, content: _buildText('$nebulaVersion ($goVersion)')),
           ConfigItem(
-              label: Text('Flutter version'), labelWidth: 150, content: _buildText(flutterVersion['frameworkVersion'])),
+              label: Text('Flutter version'),
+              labelWidth: 150,
+              content: _buildText(flutterVersion['frameworkVersion'] ?? 'Unknown')),
           ConfigItem(
-              label: Text('Dart version'), labelWidth: 150, content: _buildText(flutterVersion['dartSdkVersion'])),
+              label: Text('Dart version'),
+              labelWidth: 150,
+              content: _buildText(flutterVersion['dartSdkVersion'] ?? 'Unknown')),
         ]),
         ConfigSection(children: <Widget>[
           //TODO: wire up these other pages

lib/screens/HostInfoScreen.dart

@@ -14,13 +14,19 @@ import 'package:mobile_nebula/services/utils.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 class HostInfoScreen extends StatefulWidget {
-  const HostInfoScreen({Key key, this.hostInfo, this.isLighthouse, this.pending, this.onChanged, this.site})
-      : super(key: key);
+  const HostInfoScreen({
+    Key? key,
+    required this.hostInfo,
+    required this.isLighthouse,
+    required this.pending,
+    this.onChanged,
+    required this.site,
+  }) : super(key: key);
 
   final bool isLighthouse;
   final bool pending;
   final HostInfo hostInfo;
-  final Function onChanged;
+  final Function? onChanged;
   final Site site;
 
   @override
@@ -30,7 +36,7 @@ class HostInfoScreen extends StatefulWidget {
 //TODO: have a config option to refresh hostmaps on a cadence (applies to 3 screens so far)
 
 class _HostInfoScreenState extends State<HostInfoScreen> {
-  HostInfo hostInfo;
+  late HostInfo hostInfo;
   RefreshController refreshController = RefreshController(initialRefresh: false);
 
   @override
@@ -64,9 +70,9 @@ class _HostInfoScreenState extends State<HostInfoScreen> {
           ? ConfigPageItem(
               label: Text('Certificate'),
               labelWidth: 150,
-              content: Text(hostInfo.cert.details.name),
+              content: Text(hostInfo.cert!.details.name),
               onPressed: () => Utils.openPage(
-                  context, (context) => CertificateDetailsScreen(certInfo: CertificateInfo(cert: hostInfo.cert))))
+                  context, (context) => CertificateDetailsScreen(certInfo: CertificateInfo(cert: hostInfo.cert!))))
           : Container(),
     ]);
   }
@@ -116,7 +122,7 @@ class _HostInfoScreenState extends State<HostInfoScreen> {
               _setHostInfo(h);
             }
           } catch (err) {
-            Utils.popError(context, 'Error while changing the remote', err);
+            Utils.popError(context, 'Error while changing the remote', err.toString());
           }
         },
       ));
@@ -156,11 +162,11 @@ class _HostInfoScreenState extends State<HostInfoScreen> {
                       try {
                         await widget.site.closeTunnel(hostInfo.vpnIp);
                         if (widget.onChanged != null) {
-                          widget.onChanged();
+                          widget.onChanged!();
                         }
                         Navigator.pop(context);
                       } catch (err) {
-                        Utils.popError(context, 'Error while trying to close the tunnel', err);
+                        Utils.popError(context, 'Error while trying to close the tunnel', err.toString());
                       }
                     }, deleteLabel: 'Close'))));
   }
@@ -174,7 +180,7 @@ class _HostInfoScreenState extends State<HostInfoScreen> {
 
       _setHostInfo(h);
     } catch (err) {
-      Utils.popError(context, 'Failed to refresh host info', err);
+      Utils.popError(context, 'Failed to refresh host info', err.toString());
     }
   }
 

lib/screens/MainScreen.dart

@@ -23,7 +23,7 @@ import 'package:uuid/uuid.dart';
 //TODO: add refresh
 
 class MainScreen extends StatefulWidget {
-  const MainScreen({Key key}) : super(key: key);
+  const MainScreen({Key? key}) : super(key: key);
 
   @override
   _MainScreenState createState() => _MainScreenState();
@@ -31,9 +31,9 @@ class MainScreen extends StatefulWidget {
 
 class _MainScreenState extends State<MainScreen> {
   bool ready = false;
-  List<Site> sites;
+  List<Site>? sites;
   // A set of widgets to display in a column that represents an error blocking us from moving forward entirely
-  List<Widget> error;
+  List<Widget>? error;
 
   static const platform = MethodChannel('net.defined.mobileNebula/NebulaVpnService');
 
@@ -72,11 +72,14 @@ class _MainScreenState extends State<MainScreen> {
 
   Widget _buildBody() {
     if (error != null) {
-      return Center(child: Padding(child: Column(
+      return Center(
+          child: Padding(
+              child: Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 crossAxisAlignment: CrossAxisAlignment.center,
-        children: error,
-      ), padding: EdgeInsets.symmetric(vertical: 0, horizontal: 10)));
+                children: error!,
+              ),
+              padding: EdgeInsets.symmetric(vertical: 0, horizontal: 10)));
     }
 
     if (!ready) {
@@ -87,10 +90,6 @@ class _MainScreenState extends State<MainScreen> {
       );
     }
 
-    if (sites == null || sites.length == 0) {
-      return _buildNoSites();
-    }
-
     return _buildSites();
   }
 
@@ -112,8 +111,12 @@ class _MainScreenState extends State<MainScreen> {
   }
 
   Widget _buildSites() {
+    if (sites == null || sites!.length == 0) {
+      return _buildNoSites();
+    }
+
     List<Widget> items = [];
-    sites.forEach((site) {
+    sites!.forEach((site) {
       items.add(SiteItem(
           key: Key(site.id),
           site: site,
@@ -134,17 +137,17 @@ class _MainScreenState extends State<MainScreen> {
           }
 
           setState(() {
-            final Site moved = sites.removeAt(oldI);
-            sites.insert(newI, moved);
+            final Site moved = sites!.removeAt(oldI);
+            sites!.insert(newI, moved);
           });
 
           for (var i = min(oldI, newI); i <= max(oldI, newI); i++) {
-            sites[i].sortKey = i;
+            sites![i].sortKey = i;
             try {
-              await sites[i].save();
+              await sites![i].save();
             } catch (err) {
               //TODO: display error at the end
-              print('ERR ${sites[i].name} - $err');
+              print('ERR ${sites![i].name} - $err');
             }
           }
 
@@ -209,31 +212,27 @@ rmXnR1yvDZi1VPVmnNVY8NMsQpEpbbYlq7rul+ByQvg=
     if (Platform.isAndroid) {
       try {
         await platform.invokeMethod("android.requestPermissions");
-
       } on PlatformException catch (err) {
         if (err.code == "PERMISSIONS") {
           setState(() {
             error = [
-              Text("Permissions Required",
-                style: TextStyle(fontWeight: FontWeight.bold)),
+              Text("Permissions Required", style: TextStyle(fontWeight: FontWeight.bold)),
               Text(
                   "VPN permissions are required for nebula to run, click the button below request and accept the appropriate permissions.",
-                textAlign: TextAlign.center
-              ),
+                  textAlign: TextAlign.center),
               ElevatedButton(
                   onPressed: () {
                     error = null;
                     _loadSites();
                   },
-                child: Text("Request Permissions")
-              ),
+                  child: Text("Request Permissions")),
             ];
           });
         } else {
           setState(() {
             error = [
               Text("Unknown Error", style: TextStyle(fontWeight: FontWeight.bold)),
-              Text(err.message, textAlign: TextAlign.center)
+              Text(err.message ?? 'An unknown error occurred', textAlign: TextAlign.center)
             ];
           });
         }
@@ -241,7 +240,7 @@ rmXnR1yvDZi1VPVmnNVY8NMsQpEpbbYlq7rul+ByQvg=
         setState(() {
           error = [
             Text("Unknown Error", style: TextStyle(fontWeight: FontWeight.bold)),
-            Text(err.message, textAlign: TextAlign.center)
+            Text(err.toString(), textAlign: TextAlign.center)
           ];
         });
       }
@@ -264,12 +263,12 @@ rmXnR1yvDZi1VPVmnNVY8NMsQpEpbbYlq7rul+ByQvg=
           setState(() {});
         }, onError: (err) {
           setState(() {});
-          if (ModalRoute.of(context).isCurrent) {
+          if (ModalRoute.of(context)!.isCurrent) {
             Utils.popError(context, "${site.name} Error", err);
           }
         });
 
-        sites.add(site);
+        sites!.add(site);
       } catch (err) {
         //TODO: handle error
         print("$err site config: $rawSite");
@@ -288,7 +287,7 @@ rmXnR1yvDZi1VPVmnNVY8NMsQpEpbbYlq7rul+ByQvg=
           "1 or more sites have errors and need your attention, problem sites have a red border.");
     }
 
-    sites.sort((a, b) {
+    sites!.sort((a, b) {
       return a.sortKey - b.sortKey;
     });
 

lib/screens/SiteDetailScreen.dart

@@ -20,24 +20,24 @@ import 'package:pull_to_refresh/pull_to_refresh.dart';
 //TODO: ios is now the problem with connecting screwing our ability to query the hostmap (its a race)
 
 class SiteDetailScreen extends StatefulWidget {
-  const SiteDetailScreen({Key key, this.site, this.onChanged}) : super(key: key);
+  const SiteDetailScreen({Key? key, required this.site, this.onChanged}) : super(key: key);
 
   final Site site;
-  final Function onChanged;
+  final Function? onChanged;
 
   @override
   _SiteDetailScreenState createState() => _SiteDetailScreenState();
 }
 
 class _SiteDetailScreenState extends State<SiteDetailScreen> {
-  Site site;
-  StreamSubscription onChange;
+  late Site site;
+  late StreamSubscription onChange;
   static const platform = MethodChannel('net.defined.mobileNebula/NebulaVpnService');
   bool changed = false;
-  List<HostInfo> activeHosts;
-  List<HostInfo> pendingHosts;
+  List<HostInfo>? activeHosts;
+  List<HostInfo>? pendingHosts;
   RefreshController refreshController = RefreshController(initialRefresh: false);
-  bool lastState;
+  late bool lastState;
 
   @override
   void initState() {
@@ -80,7 +80,7 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
         title: site.name,
         leadingAction: Utils.leadingBackWidget(context, onPressed: () {
           if (changed && widget.onChanged != null) {
-            widget.onChanged();
+            widget.onChanged!();
           }
           Navigator.pop(context);
         }),
@@ -162,13 +162,13 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
     if (activeHosts == null) {
       active = SizedBox(height: 20, width: 20, child: PlatformCircularProgressIndicator());
     } else {
-      active = Text(Utils.itemCountFormat(activeHosts.length, singleSuffix: "tunnel", multiSuffix: "tunnels"));
+      active = Text(Utils.itemCountFormat(activeHosts!.length, singleSuffix: "tunnel", multiSuffix: "tunnels"));
     }
 
     if (pendingHosts == null) {
       pending = SizedBox(height: 20, width: 20, child: PlatformCircularProgressIndicator());
     } else {
-      pending = Text(Utils.itemCountFormat(pendingHosts.length, singleSuffix: "tunnel", multiSuffix: "tunnels"));
+      pending = Text(Utils.itemCountFormat(pendingHosts!.length, singleSuffix: "tunnel", multiSuffix: "tunnels"));
     }
 
     return ConfigSection(
@@ -176,11 +176,13 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
       children: <Widget>[
         ConfigPageItem(
             onPressed: () {
+              if (activeHosts == null) return;
+
               Utils.openPage(
                   context,
                   (context) => SiteTunnelsScreen(
                       pending: false,
-                      tunnels: activeHosts,
+                      tunnels: activeHosts!,
                       site: site,
                       onChanged: (hosts) {
                         setState(() {
@@ -192,11 +194,13 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
             content: Container(alignment: Alignment.centerRight, child: active)),
         ConfigPageItem(
             onPressed: () {
+              if (pendingHosts == null) return;
+
               Utils.openPage(
                   context,
                   (context) => SiteTunnelsScreen(
                       pending: true,
-                      tunnels: pendingHosts,
+                      tunnels: pendingHosts!,
                       site: site,
                       onChanged: (hosts) {
                         setState(() {
@@ -250,7 +254,7 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
       pendingHosts = maps["pending"];
       setState(() {});
     } catch (err) {
-      Utils.popError(context, 'Error while fetching hostmaps', err);
+      Utils.popError(context, 'Error while fetching hostmaps', err.toString());
     }
   }
 
@@ -267,7 +271,7 @@ class _SiteDetailScreenState extends State<SiteDetailScreen> {
     }
 
     if (widget.onChanged != null) {
-      widget.onChanged();
+      widget.onChanged!();
     }
     return true;
   }

lib/screens/SiteLogsScreen.dart

@@ -11,7 +11,7 @@ import 'package:mobile_nebula/services/utils.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 class SiteLogsScreen extends StatefulWidget {
-  const SiteLogsScreen({Key key, this.site}) : super(key: key);
+  const SiteLogsScreen({Key? key, required this.site}) : super(key: key);
 
   final Site site;
 

lib/screens/SiteTunnelsScreen.dart

@@ -10,26 +10,28 @@ import 'package:mobile_nebula/services/utils.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 class SiteTunnelsScreen extends StatefulWidget {
-  const SiteTunnelsScreen({Key key, this.site, this.tunnels, this.pending, this.onChanged}) : super(key: key);
+  const SiteTunnelsScreen(
+      {Key? key, required this.site, required this.tunnels, required this.pending, required this.onChanged})
+      : super(key: key);
 
   final Site site;
   final List<HostInfo> tunnels;
   final bool pending;
-  final Function(List<HostInfo>) onChanged;
+  final Function(List<HostInfo>)? onChanged;
 
   @override
   _SiteTunnelsScreenState createState() => _SiteTunnelsScreenState();
 }
 
 class _SiteTunnelsScreenState extends State<SiteTunnelsScreen> {
-  Site site;
-  List<HostInfo> tunnels;
+  late Site site;
+  late List<HostInfo> tunnels;
   RefreshController refreshController = RefreshController(initialRefresh: false);
 
   @override
   void initState() {
     site = widget.site;
-    tunnels = widget.tunnels ?? [];
+    tunnels = widget.tunnels;
     _sortTunnels();
     super.initState();
   }
@@ -67,7 +69,7 @@ class _SiteTunnelsScreenState extends State<SiteTunnelsScreen> {
                 })),
         label: Row(children: <Widget>[Padding(child: icon, padding: EdgeInsets.only(right: 10)), Text(hostInfo.vpnIp)]),
         labelWidth: ipWidth,
-        content: Container(alignment: Alignment.centerRight, child: Text(hostInfo.cert?.details?.name ?? "")),
+        content: Container(alignment: Alignment.centerRight, child: Text(hostInfo.cert?.details.name ?? "")),
       ));
     });
 
@@ -121,11 +123,11 @@ class _SiteTunnelsScreenState extends State<SiteTunnelsScreen> {
 
       _sortTunnels();
       if (widget.onChanged != null) {
-        widget.onChanged(tunnels);
+        widget.onChanged!(tunnels);
       }
       setState(() {});
     } catch (err) {
-      Utils.popError(context, 'Error while fetching hostmap', err);
+      Utils.popError(context, 'Error while fetching hostmap', err.toString());
     }
   }
 }

lib/screens/siteConfig/AddCertificateScreen.dart

@@ -1,9 +1,9 @@
 import 'dart:convert';
 
-import 'package:barcode_scan/barcode_scan.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_barcode_scanner/flutter_barcode_scanner.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 import 'package:mobile_nebula/components/SimplePage.dart';
 import 'package:mobile_nebula/components/config/ConfigButtonItem.dart';
@@ -20,16 +20,24 @@ class CertificateResult {
   CertificateInfo certInfo;
   String key;
 
-  CertificateResult({this.certInfo, this.key});
+  CertificateResult({required this.certInfo, required this.key});
 }
 
 class AddCertificateScreen extends StatefulWidget {
-  const AddCertificateScreen({Key key, this.onSave, this.onReplace, this.pubKey, this.privKey}) : super(key: key);
+  const AddCertificateScreen({
+    Key? key,
+    this.onSave,
+    this.onReplace,
+    required this.pubKey,
+    required this.privKey,
+  }) : super(key: key);
 
-  // onSave will pop a new CertificateDetailsScreen
-  final ValueChanged<CertificateResult> onSave;
-  // onReplace will return the CertificateResult, assuming the previous screen is a CertificateDetailsScreen
-  final ValueChanged<CertificateResult> onReplace;
+  // onSave will pop a new CertificateDetailsScreen.
+  // If onSave is null, onReplace must be set.
+  final ValueChanged<CertificateResult>? onSave;
+  // onReplace will return the CertificateResult, assuming the previous screen is a CertificateDetailsScreen.
+  // If onReplace is null, onSave must be set.
+  final ValueChanged<CertificateResult>? onReplace;
 
   final String pubKey;
   final String privKey;
@@ -39,7 +47,7 @@ class AddCertificateScreen extends StatefulWidget {
 }
 
 class _AddCertificateScreenState extends State<AddCertificateScreen> {
-  String pubKey;
+  late String pubKey;
   bool showKey = false;
 
   String inputType = 'paste';
@@ -98,9 +106,11 @@ class _AddCertificateScreenState extends State<AddCertificateScreen> {
           child: CupertinoSlidingSegmentedControl(
             groupValue: inputType,
             onValueChanged: (v) {
+              if (v != null) {
                 setState(() {
                   inputType = v;
                 });
+              }
             },
             children: {
               'paste': Text('Copy/Paste'),
@@ -140,10 +150,7 @@ class _AddCertificateScreenState extends State<AddCertificateScreen> {
     return ConfigSection(
       label: 'Import a private key generated on another device',
       children: [
-        ConfigTextItem(
-          controller: keyController,
-          style: TextStyle(fontFamily: 'RobotoMono', fontSize: 14)
-        ),
+        ConfigTextItem(controller: keyController, style: TextStyle(fontFamily: 'RobotoMono', fontSize: 14)),
       ],
     );
   }
@@ -196,13 +203,13 @@ class _AddCertificateScreenState extends State<AddCertificateScreen> {
           ConfigButtonItem(
               content: Text('Scan a QR code'),
               onPressed: () async {
-                var options = ScanOptions(
-                  restrictFormat: [BarcodeFormat.qr],
-                );
-
-                var result = await BarcodeScanner.scan(options: options);
-                if (result.rawContent != "") {
-                  _addCertEntry(result.rawContent);
+                try {
+                  var result = await FlutterBarcodeScanner.scanBarcode('#ff6666', 'Cancel', true, ScanMode.QR);
+                  if (result != "") {
+                    _addCertEntry(result);
+                  }
+                } catch (err) {
+                  return Utils.popError(context, 'Error scanning QR code', err.toString());
                 }
               }),
         ],
@@ -225,37 +232,35 @@ class _AddCertificateScreenState extends State<AddCertificateScreen> {
         if (tryCertInfo.cert.details.isCa) {
           return Utils.popError(context, 'Error loading certificate content',
               'A certificate authority is not appropriate for a client certificate.');
-        } else if (!tryCertInfo.validity.valid) {
-          return Utils.popError(context, 'Certificate was invalid', tryCertInfo.validity.reason);
+        } else if (!tryCertInfo.validity!.valid) {
+          return Utils.popError(context, 'Certificate was invalid', tryCertInfo.validity!.reason);
         }
 
-        var certMatch = await platform.invokeMethod(
-            "nebula.verifyCertAndKey",
-            <String, String>{"cert": rawCert, "key": keyController.text}
-        );
+        var certMatch = await platform
+            .invokeMethod("nebula.verifyCertAndKey", <String, String>{"cert": rawCert, "key": keyController.text});
         if (!certMatch) {
           // The method above will throw if there is a mismatch, this is just here in case we introduce a bug in the future
           return Utils.popError(context, 'Error loading certificate content',
               'The provided certificates public key is not compatible with the private key.');
         }
 
-        // If we are replacing we just return the results now
         if (widget.onReplace != null) {
+          // If we are replacing we just return the results now
           Navigator.pop(context);
-          widget.onReplace(CertificateResult(certInfo: tryCertInfo, key: keyController.text));
+          widget.onReplace!(CertificateResult(certInfo: tryCertInfo, key: keyController.text));
           return;
-        }
-
+        } else if (widget.onSave != null) {
           // We have a cert, pop the details screen where they can hit save
           Utils.openPage(context, (context) {
             return CertificateDetailsScreen(
                 certInfo: tryCertInfo,
                 onSave: () {
                   Navigator.pop(context);
-                widget.onSave(CertificateResult(certInfo: tryCertInfo, key: keyController.text));
+                  widget.onSave!(CertificateResult(certInfo: tryCertInfo, key: keyController.text));
                 });
           });
         }
+      }
     } on PlatformException catch (err) {
       return Utils.popError(context, 'Error loading certificate content', err.details ?? err.message);
     }

lib/screens/siteConfig/AdvancedScreen.dart

@@ -28,10 +28,23 @@ class Advanced {
   String verbosity;
   List<UnsafeRoute> unsafeRoutes;
   int mtu;
+
+  Advanced({
+    required this.lhDuration,
+    required this.port,
+    required this.cipher,
+    required this.verbosity,
+    required this.unsafeRoutes,
+    required this.mtu,
+  });
 }
 
 class AdvancedScreen extends StatefulWidget {
-  const AdvancedScreen({Key key, this.site, @required this.onSave}) : super(key: key);
+  const AdvancedScreen({
+    Key? key,
+    required this.site,
+    required this.onSave,
+  }) : super(key: key);
 
   final Site site;
   final ValueChanged<Advanced> onSave;
@@ -41,17 +54,19 @@ class AdvancedScreen extends StatefulWidget {
 }
 
 class _AdvancedScreenState extends State<AdvancedScreen> {
-  var settings = Advanced();
+  late Advanced settings;
   var changed = false;
 
   @override
   void initState() {
-    settings.lhDuration = widget.site.lhDuration;
-    settings.port = widget.site.port;
-    settings.cipher = widget.site.cipher;
-    settings.verbosity = widget.site.logVerbosity;
-    settings.unsafeRoutes = widget.site.unsafeRoutes;
-    settings.mtu = widget.site.mtu;
+    settings = Advanced(
+      lhDuration: widget.site.lhDuration,
+      port: widget.site.port,
+      cipher: widget.site.cipher,
+      verbosity: widget.site.logVerbosity,
+      unsafeRoutes: widget.site.unsafeRoutes,
+      mtu: widget.site.mtu,
+    );
     super.initState();
   }
 
@@ -80,7 +95,9 @@ class _AdvancedScreenState extends State<AdvancedScreen> {
                     inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                     onSaved: (val) {
                       setState(() {
-                        settings.lhDuration = int.parse(val);
+                        if (val != null) {
+                          settings.lhDuration = int.parse(val!);
+                        }
                       });
                     },
                   )),
@@ -96,7 +113,9 @@ class _AdvancedScreenState extends State<AdvancedScreen> {
                     inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                     onSaved: (val) {
                       setState(() {
-                        settings.port = int.parse(val);
+                        if (val != null) {
+                          settings.port = int.parse(val!);
+                        }
                       });
                     },
                   )),
@@ -111,7 +130,9 @@ class _AdvancedScreenState extends State<AdvancedScreen> {
                     inputFormatters: [FilteringTextInputFormatter.digitsOnly],
                     onSaved: (val) {
                       setState(() {
-                        settings.mtu = int.parse(val);
+                        if (val != null) {
+                          settings.mtu = int.parse(val!);
+                        }
                       });
                     },
                   )),
@@ -177,7 +198,7 @@ class _AdvancedScreenState extends State<AdvancedScreen> {
                       return RenderedConfigScreen(config: config, name: widget.site.name);
                     });
                   } catch (err) {
-                    Utils.popError(context, 'Failed to render the site config', err);
+                    Utils.popError(context, 'Failed to render the site config', err.toString());
                   }
                 },
               )

lib/screens/siteConfig/CAListScreen.dart

@@ -1,8 +1,8 @@
 import 'dart:convert';
 
-import 'package:barcode_scan/barcode_scan.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_barcode_scanner/flutter_barcode_scanner.dart';
 import 'package:mobile_nebula/components/FormPage.dart';
 import 'package:mobile_nebula/components/config/ConfigButtonItem.dart';
 import 'package:mobile_nebula/components/config/ConfigPageItem.dart';
@@ -17,10 +17,14 @@ import 'package:mobile_nebula/services/utils.dart';
 //TODO: In addition you will want to think about re-generation while the site is still active (This means storing multiple keys in secure storage)
 
 class CAListScreen extends StatefulWidget {
-  const CAListScreen({Key key, this.cas, @required this.onSave}) : super(key: key);
+  const CAListScreen({
+    Key? key,
+    required this.cas,
+    this.onSave,
+  }) : super(key: key);
 
   final List<CertificateInfo> cas;
-  final ValueChanged<List<CertificateInfo>> onSave;
+  final ValueChanged<List<CertificateInfo>>? onSave;
 
   @override
   _CAListScreenState createState() => _CAListScreenState();
@@ -59,7 +63,7 @@ class _CAListScreenState extends State<CAListScreen> {
         onSave: () {
           if (widget.onSave != null) {
             Navigator.pop(context);
-            widget.onSave(cas.values.map((ca) {
+            widget.onSave!(cas.values.map((ca) {
               return ca;
             }).toList());
           }
@@ -90,8 +94,8 @@ class _CAListScreenState extends State<CAListScreen> {
     return items;
   }
 
-  _addCAEntry(String ca, ValueChanged<String> callback) async {
-    String error;
+  _addCAEntry(String ca, ValueChanged<String?> callback) async {
+    String? error;
 
     //TODO: show an error popup
     try {
@@ -118,10 +122,8 @@ class _CAListScreenState extends State<CAListScreen> {
       error = err.details ?? err.message;
     }
 
-    if (callback != null) {
     callback(error);
   }
-  }
 
   List<Widget> _addCA() {
     List<Widget> items = [
@@ -130,9 +132,11 @@ class _CAListScreenState extends State<CAListScreen> {
           child: CupertinoSlidingSegmentedControl(
             groupValue: inputType,
             onValueChanged: (v) {
+              if (v != null) {
                 setState(() {
                   inputType = v;
                 });
+              }
             },
             children: {
               'paste': Text('Copy/Paste'),
@@ -215,13 +219,10 @@ class _CAListScreenState extends State<CAListScreen> {
           ConfigButtonItem(
               content: Text('Scan a QR code'),
               onPressed: () async {
-                var options = ScanOptions(
-                  restrictFormat: [BarcodeFormat.qr],
-                );
-
-                var result = await BarcodeScanner.scan(options: options);
-                if (result.rawContent != "") {
-                  _addCAEntry(result.rawContent, (err) {
+                try {
+                  var result = await FlutterBarcodeScanner.scanBarcode('#ff6666', 'Cancel', true, ScanMode.QR);
+                  if (result != "") {
+                    _addCAEntry(result, (err) {
                       if (err != null) {
                         Utils.popError(context, 'Error loading CA content', err);
                       } else {
@@ -229,6 +230,9 @@ class _CAListScreenState extends State<CAListScreen> {
                       }
                     });
                   }
+                } catch (err) {
+                  return Utils.popError(context, 'Error scanning QR code', err.toString());
+                }
               })
         ],
       )

lib/screens/siteConfig/CertificateDetailsScreen.dart

@@ -10,22 +10,30 @@ import 'package:mobile_nebula/services/utils.dart';
 
 /// Displays the details of a CertificateInfo object. Respects incomplete objects (missing validity or rawCert)
 class CertificateDetailsScreen extends StatefulWidget {
-  const CertificateDetailsScreen({Key key, this.certInfo, this.onDelete, this.onSave, this.onReplace, this.pubKey, this.privKey})
-      : super(key: key);
+  const CertificateDetailsScreen({
+    Key? key,
+    required this.certInfo,
+    this.onDelete,
+    this.onSave,
+    this.onReplace,
+    this.pubKey,
+    this.privKey,
+  }) : super(key: key);
 
   final CertificateInfo certInfo;
 
   // onDelete is used to remove a CA cert
-  final Function onDelete;
+  final Function? onDelete;
 
   // onSave is used to install a new certificate
-  final Function onSave;
+  final Function? onSave;
 
   // onReplace is used to install a new certificate over top of the old one
-  final ValueChanged<CertificateResult> onReplace;
+  final ValueChanged<CertificateResult>? onReplace;
 
-  final String pubKey;
-  final String privKey;
+  // pubKey and privKey should be set if onReplace is not null.
+  final String? pubKey;
+  final String? privKey;
 
   @override
   _CertificateDetailsScreenState createState() => _CertificateDetailsScreenState();
@@ -33,8 +41,8 @@ class CertificateDetailsScreen extends StatefulWidget {
 
 class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
   bool changed = false;
-  CertificateResult certResult;
-  CertificateInfo certInfo;
+  CertificateResult? certResult;
+  late CertificateInfo certInfo;
   ScrollController controller = ScrollController();
 
   @override
@@ -58,10 +66,10 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
       onSave: () {
         if (widget.onSave != null) {
           Navigator.pop(context);
-          widget.onSave();
+          widget.onSave!();
         } else if (widget.onReplace != null) {
           Navigator.pop(context);
-          widget.onReplace(certResult);
+          widget.onReplace!(certResult!);
         }
       },
       hideSave: widget.onSave == null && widget.onReplace == null,
@@ -86,8 +94,8 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
 
   Widget _buildValid() {
     var valid = Text('yes');
-    if (certInfo.validity != null && !certInfo.validity.valid) {
-      valid = Text(certInfo.validity.valid ? 'yes' : certInfo.validity.reason,
+    if (certInfo.validity != null && !certInfo.validity!.valid) {
+      valid = Text(certInfo.validity!.valid ? 'yes' : certInfo.validity!.reason,
           style: TextStyle(color: CupertinoColors.systemRed.resolveFrom(context)));
     }
     return ConfigSection(
@@ -137,7 +145,7 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
         certInfo.rawCert != null
             ? ConfigItem(
                 label: Text('PEM Format'),
-                content: SelectableText(certInfo.rawCert, style: TextStyle(fontFamily: 'RobotoMono', fontSize: 14)),
+                content: SelectableText(certInfo.rawCert!, style: TextStyle(fontFamily: 'RobotoMono', fontSize: 14)),
                 crossAxisAlignment: CrossAxisAlignment.start)
             : Container(),
       ],
@@ -145,7 +153,7 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
   }
 
   Widget _buildReplace() {
-    if (widget.onReplace == null) {
+    if (widget.onReplace == null || widget.pubKey == null || widget.privKey == null) {
       return Container();
     }
 
@@ -158,16 +166,19 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
                 color: CupertinoColors.systemRed.resolveFrom(context),
                 onPressed: () {
                   Utils.openPage(context, (context) {
-                    return AddCertificateScreen(onReplace: (result) {
+                    return AddCertificateScreen(
+                        onReplace: (result) {
                           setState(() {
                             changed = true;
                             certResult = result;
-                        certInfo = certResult.certInfo;
+                            certInfo = result.certInfo;
                           });
                           // Slam the page back to the top
                           controller.animateTo(0,
                               duration: const Duration(milliseconds: 10), curve: Curves.linearToEaseOut);
-                    }, pubKey: widget.pubKey, privKey: widget.privKey, );
+                        },
+                        pubKey: widget.pubKey!,
+                        privKey: widget.privKey!);
                   });
                 })));
   }
@@ -188,7 +199,7 @@ class _CertificateDetailsScreenState extends State<CertificateDetailsScreen> {
                 color: CupertinoColors.systemRed.resolveFrom(context),
                 onPressed: () => Utils.confirmDelete(context, title, () async {
                       Navigator.pop(context);
-                      widget.onDelete();
+                      widget.onDelete!();
                     }))));
   }
 }

lib/screens/siteConfig/CipherScreen.dart

@@ -6,7 +6,11 @@ import 'package:mobile_nebula/components/config/ConfigCheckboxItem.dart';
 import 'package:mobile_nebula/components/config/ConfigSection.dart';
 
 class CipherScreen extends StatefulWidget {
-  const CipherScreen({Key key, this.cipher, @required this.onSave}) : super(key: key);
+  const CipherScreen({
+    Key? key,
+    required this.cipher,
+    required this.onSave,
+  }) : super(key: key);
 
   final String cipher;
   final ValueChanged<String> onSave;
@@ -16,7 +20,7 @@ class CipherScreen extends StatefulWidget {
 }
 
 class _CipherScreenState extends State<CipherScreen> {
-  String cipher;
+  late String cipher;
   bool changed = false;
 
   @override
@@ -32,9 +36,7 @@ class _CipherScreenState extends State<CipherScreen> {
         changed: changed,
         onSave: () {
           Navigator.pop(context);
-          if (widget.onSave != null) {
           widget.onSave(cipher);
-          }
         },
         child: Column(
           children: <Widget>[

lib/screens/siteConfig/LogVerbosityScreen.dart

@@ -6,7 +6,11 @@ import 'package:mobile_nebula/components/config/ConfigCheckboxItem.dart';
 import 'package:mobile_nebula/components/config/ConfigSection.dart';
 
 class LogVerbosityScreen extends StatefulWidget {
-  const LogVerbosityScreen({Key key, this.verbosity, @required this.onSave}) : super(key: key);
+  const LogVerbosityScreen({
+    Key? key,
+    required this.verbosity,
+    required this.onSave,
+  }) : super(key: key);
 
   final String verbosity;
   final ValueChanged<String> onSave;
@@ -16,7 +20,7 @@ class LogVerbosityScreen extends StatefulWidget {
 }
 
 class _LogVerbosityScreenState extends State<LogVerbosityScreen> {
-  String verbosity;
+  late String verbosity;
   bool changed = false;
 
   @override
@@ -32,9 +36,7 @@ class _LogVerbosityScreenState extends State<LogVerbosityScreen> {
         changed: changed,
         onSave: () {
           Navigator.pop(context);
-          if (widget.onSave != null) {
           widget.onSave(verbosity);
-          }
         },
         child: Column(
           children: <Widget>[

lib/screens/siteConfig/RenderedConfigScreen.dart

@@ -7,7 +7,11 @@ class RenderedConfigScreen extends StatelessWidget {
   final String config;
   final String name;
 
-  RenderedConfigScreen({Key key, this.config, this.name}) : super(key: key);
+  RenderedConfigScreen({
+    Key? key,
+    required this.config,
+    required this.name,
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

lib/screens/siteConfig/SiteConfigScreen.dart

@@ -22,9 +22,13 @@ import 'package:mobile_nebula/services/utils.dart';
 //TODO: Enforce a name
 
 class SiteConfigScreen extends StatefulWidget {
-  const SiteConfigScreen({Key key, this.site, this.onSave}) : super(key: key);
+  const SiteConfigScreen({
+    Key? key,
+    this.site,
+    required this.onSave,
+  }) : super(key: key);
 
-  final Site site;
+  final Site? site;
 
   // This is called after the target OS has saved the configuration
   final ValueChanged<Site> onSave;
@@ -37,9 +41,9 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
   bool changed = false;
   bool newSite = false;
   bool debug = false;
-  Site site;
-  String pubKey;
-  String privKey;
+  late Site site;
+  String? pubKey;
+  String? privKey;
 
   static const platform = MethodChannel('net.defined.mobileNebula/NebulaVpnService');
   final nameController = TextEditingController();
@@ -52,7 +56,7 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
       newSite = true;
       site = Site();
     } else {
-      site = widget.site;
+      site = widget.site!;
       nameController.text = site.name;
     }
 
@@ -61,7 +65,7 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
 
   @override
   Widget build(BuildContext context) {
-    if (pubKey == null) {
+    if (pubKey == null || privKey == null) {
       return Center(
         child: fpw.PlatformCircularProgressIndicator(cupertino: (_, __) {
           return fpw.CupertinoProgressIndicatorData(radius: 50);
@@ -81,9 +85,7 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
           }
 
           Navigator.pop(context);
-          if (widget.onSave != null) {
           widget.onSave(site);
-          }
         },
         child: Column(
           children: <Widget>[
@@ -126,11 +128,11 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
   }
 
   Widget _keys() {
-    final certError = site.certInfo == null || !site.certInfo.validity.valid;
+    final certError = site.certInfo == null || site.certInfo!.validity == null || !site.certInfo!.validity!.valid;
     var caError = site.ca.length == 0;
     if (!caError) {
       site.ca.forEach((ca) {
-        if (!ca.validity.valid) {
+        if (ca.validity == null || !ca.validity!.valid) {
           caError = true;
         }
       });
@@ -147,13 +149,13 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
                     child: Icon(Icons.error, color: CupertinoColors.systemRed.resolveFrom(context), size: 20),
                     padding: EdgeInsets.only(right: 5))
                 : Container(),
-            certError ? Text('Needs attention') : Text(site.certInfo.cert.details.name)
+            certError ? Text('Needs attention') : Text(site.certInfo?.cert.details.name ?? 'Unknown certificate')
           ]),
           onPressed: () {
             Utils.openPage(context, (context) {
               if (site.certInfo != null) {
                 return CertificateDetailsScreen(
-                    certInfo: site.certInfo,
+                    certInfo: site.certInfo!,
                     pubKey: pubKey,
                     privKey: privKey,
                     onReplace: (result) {
@@ -165,7 +167,10 @@ class _SiteConfigScreenState extends State<SiteConfigScreen> {
                     });
               }
 
-              return AddCertificateScreen(pubKey: pubKey, privKey: privKey, onSave: (result) {
+              return AddCertificateScreen(
+                  pubKey: pubKey!,
+                  privKey: privKey!,
+                  onSave: (result) {
                     setState(() {
                       changed = true;
                       site.certInfo = result.certInfo;

lib/screens/siteConfig/StaticHostmapScreen.dart

@@ -15,35 +15,42 @@ class _IPAndPort {
   final FocusNode focusNode;
   IPAndPort destination;
 
-  _IPAndPort({this.focusNode, this.destination});
+  _IPAndPort({required this.focusNode, required this.destination});
 }
 
 class StaticHostmapScreen extends StatefulWidget {
-  const StaticHostmapScreen(
-      {Key key, this.nebulaIp, this.destinations, this.lighthouse = false, this.onDelete, @required this.onSave})
-      : super(key: key);
+  StaticHostmapScreen({
+    Key? key,
+    this.nebulaIp = '',
+    destinations,
+    this.lighthouse = false,
+    this.onDelete,
+    required this.onSave,
+  })  : this.destinations = destinations ?? [],
+        super(key: key);
 
   final List<IPAndPort> destinations;
   final String nebulaIp;
   final bool lighthouse;
   final ValueChanged<Hostmap> onSave;
-  final Function onDelete;
+  final Function? onDelete;
 
   @override
   _StaticHostmapScreenState createState() => _StaticHostmapScreenState();
 }
 
 class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
-  Map<Key, _IPAndPort> _destinations = {};
-  String _nebulaIp;
-  bool _lighthouse;
+  late Map<Key, _IPAndPort> _destinations;
+  late String _nebulaIp;
+  late bool _lighthouse;
   bool changed = false;
 
   @override
   void initState() {
     _nebulaIp = widget.nebulaIp;
     _lighthouse = widget.lighthouse;
-    widget.destinations?.forEach((dest) {
+    _destinations = {};
+    widget.destinations.forEach((dest) {
       _destinations[UniqueKey()] = _IPAndPort(focusNode: FocusNode(), destination: dest);
     });
 
@@ -75,7 +82,9 @@ class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
                     crossAxisAlignment: CrossAxisAlignment.end,
                     textInputAction: TextInputAction.next,
                     onSaved: (v) {
+                      if (v != null) {
                         _nebulaIp = v;
+                      }
                     })),
             ConfigItem(
               label: Text('Lighthouse'),
@@ -107,7 +116,7 @@ class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
                         color: CupertinoColors.systemRed.resolveFrom(context),
                         onPressed: () => Utils.confirmDelete(context, 'Delete host map?', () {
                           Navigator.of(context).pop();
-                          widget.onDelete();
+                          widget.onDelete!();
                         }),
                       )))
               : Container()
@@ -116,7 +125,6 @@ class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
 
   _onSave() {
     Navigator.pop(context);
-    if (widget.onSave != null) {
     var map = Hostmap(nebulaIp: _nebulaIp, destinations: [], lighthouse: _lighthouse);
 
     _destinations.forEach((_, dest) {
@@ -125,7 +133,6 @@ class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
 
     widget.onSave(map);
   }
-  }
 
   List<Widget> _buildHosts() {
     List<Widget> items = [];
@@ -152,7 +159,9 @@ class _StaticHostmapScreenState extends State<StaticHostmapScreen> {
             noBorder: true,
             initialValue: dest.destination,
             onSaved: (v) {
+              if (v != null) {
                 dest.destination = v;
+              }
             },
           )),
         ]),

lib/screens/siteConfig/StaticHostsScreen.dart

@@ -18,12 +18,20 @@ class _Hostmap {
   List<IPAndPort> destinations;
   bool lighthouse;
 
-  _Hostmap({this.focusNode, this.nebulaIp, destinations, this.lighthouse})
-      : destinations = destinations ?? <IPAndPort>[];
+  _Hostmap({
+    required this.focusNode,
+    required this.nebulaIp,
+    required this.destinations,
+    required this.lighthouse,
+  });
 }
 
 class StaticHostsScreen extends StatefulWidget {
-  const StaticHostsScreen({Key key, @required this.hostmap, @required this.onSave}) : super(key: key);
+  const StaticHostsScreen({
+    Key? key,
+    required this.hostmap,
+    required this.onSave,
+  }) : super(key: key);
 
   final Map<String, StaticHost> hostmap;
   final ValueChanged<Map<String, StaticHost>> onSave;
@@ -38,7 +46,7 @@ class _StaticHostsScreenState extends State<StaticHostsScreen> {
 
   @override
   void initState() {
-    widget.hostmap?.forEach((key, map) {
+    widget.hostmap.forEach((key, map) {
       _hostmap[UniqueKey()] =
           _Hostmap(focusNode: FocusNode(), nebulaIp: key, destinations: map.destinations, lighthouse: map.lighthouse);
     });
@@ -59,7 +67,6 @@ class _StaticHostsScreenState extends State<StaticHostsScreen> {
 
   _onSave() {
     Navigator.pop(context);
-    if (widget.onSave != null) {
     Map<String, StaticHost> map = {};
     _hostmap.forEach((_, host) {
       map[host.nebulaIp] = StaticHost(destinations: host.destinations, lighthouse: host.lighthouse);
@@ -67,7 +74,6 @@ class _StaticHostsScreenState extends State<StaticHostsScreen> {
 
     widget.onSave(map);
   }
-  }
 
   List<Widget> _buildHosts() {
     final double ipWidth = Utils.textSize("000.000.000.000", CupertinoTheme.of(context).textTheme.textStyle).width + 32;

lib/screens/siteConfig/UnsafeRouteScreen.dart

@@ -10,18 +10,23 @@ import 'package:mobile_nebula/models/UnsafeRoute.dart';
 import 'package:mobile_nebula/services/utils.dart';
 
 class UnsafeRouteScreen extends StatefulWidget {
-  const UnsafeRouteScreen({Key key, this.route, this.onDelete, @required this.onSave}) : super(key: key);
+  const UnsafeRouteScreen({
+    Key? key,
+    required this.route,
+    required this.onSave,
+    this.onDelete,
+  }) : super(key: key);
 
   final UnsafeRoute route;
   final ValueChanged<UnsafeRoute> onSave;
-  final Function onDelete;
+  final Function? onDelete;
 
   @override
   _UnsafeRouteScreenState createState() => _UnsafeRouteScreenState();
 }
 
 class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
-  UnsafeRoute route;
+  late UnsafeRoute route;
   bool changed = false;
 
   FocusNode routeFocus = FocusNode();
@@ -36,7 +41,7 @@ class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
 
   @override
   Widget build(BuildContext context) {
-    var routeCIDR = route?.route == null ? CIDR() : CIDR.fromString(route?.route);
+    var routeCIDR = route.route == null ? CIDR() : CIDR.fromString(route.route!);
 
     return FormPage(
         title: widget.onDelete == null ? 'New Unsafe Route' : 'Edit Unsafe Route',
@@ -57,7 +62,7 @@ class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
             ConfigItem(
                 label: Text('Via'),
                 content: IPFormField(
-                    initialValue: route?.via ?? "",
+                    initialValue: route.via ?? '',
                     ipOnly: true,
                     help: 'nebula ip',
                     textAlign: TextAlign.end,
@@ -66,7 +71,9 @@ class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
                     focusNode: viaFocus,
                     nextFocusNode: mtuFocus,
                     onSaved: (v) {
+                      if (v != null) {
                         route.via = v;
+                      }
                     })),
 //TODO: Android doesn't appear to support route based MTU, figure this out
 //            ConfigItem(
@@ -94,7 +101,7 @@ class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
                         color: CupertinoColors.systemRed.resolveFrom(context),
                         onPressed: () => Utils.confirmDelete(context, 'Delete unsafe route?', () {
                           Navigator.of(context).pop();
-                          widget.onDelete();
+                          widget.onDelete!();
                         }),
                       )))
               : Container()
@@ -103,8 +110,6 @@ class _UnsafeRouteScreenState extends State<UnsafeRouteScreen> {
 
   _onSave() {
     Navigator.pop(context);
-    if (widget.onSave != null) {
     widget.onSave(route);
   }
-  }
 }

lib/screens/siteConfig/UnsafeRoutesScreen.dart

@@ -8,7 +8,11 @@ import 'package:mobile_nebula/screens/siteConfig/UnsafeRouteScreen.dart';
 import 'package:mobile_nebula/services/utils.dart';
 
 class UnsafeRoutesScreen extends StatefulWidget {
-  const UnsafeRoutesScreen({Key key, @required this.unsafeRoutes, @required this.onSave}) : super(key: key);
+  const UnsafeRoutesScreen({
+    Key? key,
+    required this.unsafeRoutes,
+    required this.onSave,
+  }) : super(key: key);
 
   final List<UnsafeRoute> unsafeRoutes;
   final ValueChanged<List<UnsafeRoute>> onSave;
@@ -18,11 +22,12 @@ class UnsafeRoutesScreen extends StatefulWidget {
 }
 
 class _UnsafeRoutesScreenState extends State<UnsafeRoutesScreen> {
-  Map<Key, UnsafeRoute> unsafeRoutes = {};
+  late Map<Key, UnsafeRoute> unsafeRoutes;
   bool changed = false;
 
   @override
   void initState() {
+    unsafeRoutes = {};
     widget.unsafeRoutes.forEach((route) {
       unsafeRoutes[UniqueKey()] = route;
     });
@@ -43,17 +48,15 @@ class _UnsafeRoutesScreenState extends State<UnsafeRoutesScreen> {
 
   _onSave() {
     Navigator.pop(context);
-    if (widget.onSave != null) {
     widget.onSave(unsafeRoutes.values.toList());
   }
-  }
 
   List<Widget> _buildRoutes() {
     final double ipWidth = Utils.textSize("000.000.000.000/00", CupertinoTheme.of(context).textTheme.textStyle).width;
     List<Widget> items = [];
     unsafeRoutes.forEach((key, route) {
       items.add(ConfigPageItem(
-        label: Text(route.route),
+        label: Text(route.route ?? ''),
         labelWidth: ipWidth,
         content: Text('via ${route.via}', textAlign: TextAlign.end),
         onPressed: () {

lib/services/settings.dart

@@ -7,7 +7,6 @@ import 'package:mobile_nebula/services/storage.dart';
 class Settings {
   final _storage = Storage();
   StreamController _change = StreamController.broadcast();
-  var _ready = Completer<Settings>();
   var _settings = Map<String, dynamic>();
 
   bool get useSystemColors {
@@ -78,14 +77,11 @@ class Settings {
   }
 
   Settings._internal() {
-    _ready = Completer<Settings>();
-
     _storage.readFile("config.json").then((rawConfig) {
       if (rawConfig != null) {
         _settings = jsonDecode(rawConfig);
       }
 
-      _ready.complete();
       _change.add(null);
     });
   }

lib/services/share.dart

@@ -12,13 +12,17 @@ class Share {
   /// - title: Title of message or subject if sending an email
   /// - text: The text to share
   /// - filename: The filename to use if sending over airdrop for example
-  static Future<bool> share({@required String title, @required String text, @required String filename}) async {
-    assert(title != null && title.isNotEmpty);
-    assert(text != null && text.isNotEmpty);
-    assert(filename != null && filename.isNotEmpty);
+  static Future<bool> share({
+    required String title,
+    required String text,
+    required String filename,
+  }) async {
+    assert(title.isNotEmpty);
+    assert(text.isNotEmpty);
+    assert(filename.isNotEmpty);
 
-    if (title == null || title.isEmpty) {
-      throw FlutterError('Title cannot be null');
+    if (title.isEmpty) {
+      throw FlutterError('Title cannot be empty');
     }
 
     final bool success = await _channel.invokeMethod('share', <String, dynamic>{
@@ -34,14 +38,18 @@ class Share {
   /// - title: Title of message or subject if sending an email
   /// - filePath: Path to the file to share
   /// - filename: An optional filename to override the existing file
-  static Future<bool> shareFile({@required String title, @required String filePath, String filename}) async {
-    assert(title != null && title.isNotEmpty);
-    assert(filePath != null && filePath.isNotEmpty);
+  static Future<bool> shareFile({
+    required String title,
+    required String filePath,
+    String? filename,
+  }) async {
+    assert(title.isNotEmpty);
+    assert(filePath.isNotEmpty);
 
-    if (title == null || title.isEmpty) {
-      throw FlutterError('Title cannot be null');
-    } else if (filePath == null || filePath.isEmpty) {
-      throw FlutterError('FilePath cannot be null');
+    if (title.isEmpty) {
+      throw FlutterError('Title cannot be empty');
+    } else if (filePath.isEmpty) {
+      throw FlutterError('FilePath cannot be empty');
     }
 
     final bool success = await _channel.invokeMethod('shareFile', <String, dynamic>{

lib/services/storage.dart

@@ -34,7 +34,7 @@ class Storage {
     return directory.path;
   }
 
-  Future<String> readFile(String path) async {
+  Future<String?> readFile(String path) async {
     try {
       final parent = await localPath;
       final file = File(p.join(parent, path));

lib/services/utils.dart

@@ -52,7 +52,7 @@ class Utils {
 
   /// Builds a simple leading widget that pops the current screen.
   /// Provide your own onPressed to override that behavior, just remember you have to pop
-  static Widget leadingBackWidget(BuildContext context, {label = 'Back', Function onPressed}) {
+  static Widget leadingBackWidget(BuildContext context, {label = 'Back', Function? onPressed}) {
     if (Platform.isIOS) {
       return CupertinoButton(
         child: Row(children: <Widget>[Icon(context.platformIcons.back), Text(label)]),
@@ -83,11 +83,11 @@ class Utils {
 
   static Widget trailingSaveWidget(BuildContext context, Function onPressed) {
     return CupertinoButton(
-        child: Text('Save', style: TextStyle(
+        child: Text('Save',
+            style: TextStyle(
                 fontWeight: FontWeight.bold,
                 //TODO: For some reason on android if inherit is the default of true the text color here turns to the background color
-            inherit: Platform.isIOS ? true : false
-        )),
+                inherit: Platform.isIOS ? true : false)),
         padding: Platform.isAndroid ? null : EdgeInsets.zero,
         onPressed: () => onPressed());
   }
@@ -122,7 +122,7 @@ class Utils {
         });
   }
 
-  static popError(BuildContext context, String title, String error, {StackTrace stack}) {
+  static popError(BuildContext context, String title, String error, {StackTrace? stack}) {
     if (stack != null) {
       error += '\n${stack.toString()}';
     }
@@ -170,14 +170,14 @@ class Utils {
     return int.parse(parts[3]) | int.parse(parts[2]) << 8 | int.parse(parts[1]) << 16 | int.parse(parts[0]) << 24;
   }
 
-  static Future<String> pickFile(BuildContext context) async {
+  static Future<String?> pickFile(BuildContext context) async {
     await FilePicker.platform.clearTemporaryFiles();
     final result = await FilePicker.platform.pickFiles(allowMultiple: false);
     if (result == null) {
       return null;
     }
 
-    final file = File(result.files.first.path);
+    final file = File(result!.files.first.path!);
     return file.readAsString();
   }
 }

lib/validators/ipValidator.dart

@@ -1,6 +1,10 @@
 import 'dart:io';
 
-bool ipValidator(String str, bool enableIPV6) {
+bool ipValidator(String? str, bool enableIPV6) {
+  if (str == null) {
+    return false;
+  }
+
   final ia = InternetAddress.tryParse(str);
   if (ia == null) {
     return false;

nebula/go.mod

@@ -6,7 +6,7 @@ go 1.18
 
 require (
 	github.com/sirupsen/logrus v1.8.1
-	github.com/slackhq/nebula v1.6.0
+	github.com/slackhq/nebula v1.6.1-0.20220919174748-4c0ae3df5ef7
 	golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29
 	gopkg.in/yaml.v2 v2.4.0
 )
@@ -33,7 +33,6 @@ require (
 	github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8 // indirect
 	github.com/vishvananda/netlink v1.1.0 // indirect
 	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
-	golang.org/x/mobile v0.0.0-20220722155234-aaac322e2105 // indirect
 	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
 	golang.org/x/net v0.0.0-20220403103023-749bd193bc2b // indirect
 	golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71 // indirect

nebula/go.sum

@@ -210,8 +210,8 @@ github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6Mwd
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/slackhq/nebula v1.6.0 h1:1M2txSJq5Jef/A68Kw6SwdLS0PMtjhx4X509ZBHtG54=
-github.com/slackhq/nebula v1.6.0/go.mod h1:UmkqnXe4O53QwToSl/gG7sM4BroQwAB7dd4hUaT6MlI=
+github.com/slackhq/nebula v1.6.1-0.20220919174748-4c0ae3df5ef7 h1:u06zUX/HdLxZnyewES34xIjRELl5xDXCLseiiBn6Dyo=
+github.com/slackhq/nebula v1.6.1-0.20220919174748-4c0ae3df5ef7/go.mod h1:UmkqnXe4O53QwToSl/gG7sM4BroQwAB7dd4hUaT6MlI=
 github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8 h1:TG/diQgUe0pntT/2D9tmUCz4VNwm9MfrtPr0SU2qSX8=
 github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8/go.mod h1:P5HUIBuIWKbyjl083/loAegFkfbFNx5i2qEP4CNbm7E=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -231,7 +231,6 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
@@ -249,7 +248,6 @@ golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29/go.mod h1:IxCIyHEi3zRg3s0
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
-golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9tZUw9qufEGTyX1+7lmHxV5q5G4=
 golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
 golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
 golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
@@ -270,10 +268,7 @@ golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRu
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
-golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028 h1:4+4C/Iv2U4fMZBiMCc98MG1In4gJY5YRhtpDNeDeHWs=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
-golang.org/x/mobile v0.0.0-20220722155234-aaac322e2105 h1:3vUV5x5+3LfQbgk7paCM6INOaJG9xXQbn79xoNkwfIk=
-golang.org/x/mobile v0.0.0-20220722155234-aaac322e2105/go.mod h1:pe2sM7Uk+2Su1y7u/6Z8KJ24D7lepUjFZbhFOrmDfuQ=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
@@ -316,7 +311,6 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220403103023-749bd193bc2b h1:vI32FkLJNAWtGD4BwkThwEy6XS7ZLLMHkSkYfF8M0W0=
@@ -383,7 +377,6 @@ golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71 h1:PRD0hj6tTuUnCFD08vkvjkYFbQg/9lV8KIxe1y4/cvU=
@@ -444,7 +437,6 @@ golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.8-0.20211022200916-316ba0b74098/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/tools v0.1.10 h1:QjFRCZxdOhBJ/UNgnBZLbNV13DlbnK0quyivTnXJM20=
 golang.org/x/tools v0.1.10/go.mod h1:Uh6Zz+xoGYZom868N8YTex3t7RhtHDBrE8Gzo9bV56E=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

pubspec.lock

@@ -7,14 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
-  barcode_scan:
-    dependency: "direct main"
-    description:
-      name: barcode_scan
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.0.1"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,28 +21,21 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
+    version: "1.2.1"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   crypto:
     dependency: transitive
     description:
@@ -70,14 +56,14 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   ffi:
     dependency: transitive
     description:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "2.0.1"
   file:
     dependency: transitive
     description:
@@ -91,33 +77,33 @@ packages:
       name: file_picker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.4"
-  fixnum:
-    dependency: transitive
-    description:
-      name: fixnum
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.10.11"
+    version: "5.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_barcode_scanner:
+    dependency: "direct main"
+    description:
+      name: flutter_barcode_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   flutter_platform_widgets:
     dependency: "direct main"
     description:
       name: flutter_platform_widgets
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.12.1"
+    version: "2.0.0"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
       name: flutter_plugin_android_lifecycle
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.0.7"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -134,21 +120,28 @@ packages:
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.3"
+    version: "0.6.4"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.12"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   package_info:
     dependency: "direct main"
     description:
@@ -162,14 +155,14 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.2"
   path_provider:
     dependency: "direct main"
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.0.11"
   path_provider_android:
     dependency: transitive
     description:
@@ -190,7 +183,7 @@ packages:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.4"
+    version: "2.1.7"
   path_provider_macos:
     dependency: transitive
     description:
@@ -211,7 +204,7 @@ packages:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.1.3"
   platform:
     dependency: transitive
     description:
@@ -233,13 +226,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.2.4"
-  protobuf:
-    dependency: transitive
-    description:
-      name: protobuf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.4"
   pull_to_refresh:
     dependency: "direct main"
     description:
@@ -258,7 +244,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -279,21 +265,21 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.3"
+    version: "0.4.12"
   typed_data:
     dependency: transitive
     description:
@@ -370,14 +356,14 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   win32:
     dependency: transitive
     description:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.3"
+    version: "2.7.0"
   xdg_directories:
     dependency: transitive
     description:
@@ -386,5 +372,5 @@ packages:
     source: hosted
     version: "0.2.0"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=2.5.0"
+  dart: ">=2.18.1 <3.0.0"
+  flutter: ">=3.0.0"

pubspec.yaml

@@ -11,10 +11,10 @@ description: Mobile Nebula Client
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 0.1.0+52
+version: 0.1.0+54
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: '>=2.18.1 <3.0.0'
 
 dependencies:
   flutter:
@@ -23,14 +23,14 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
-  flutter_platform_widgets: ^1.2.0
-  path_provider: ^2.0.1
-  file_picker: ^3.0.2+2
-  barcode_scan: ^3.0.1
+  flutter_platform_widgets: ^2.0.0
+  path_provider: ^2.0.11
+  file_picker: ^5.0.1
   uuid: ^3.0.4
   package_info: ^2.0.0
   url_launcher: ^6.0.6
   pull_to_refresh: ^2.0.0
+  flutter_barcode_scanner: ^2.0.0
 
 dev_dependencies:
   flutter_test: