├── .flutter-plugins ├── .gitignore ├── .metadata ├── AUTHORS ├── CHANGELOG.md ├── LICENSE ├── README.md ├── example ├── .gitignore ├── .metadata ├── android │ ├── .gitignore │ ├── app │ │ ├── build.gradle │ │ └── src │ │ │ ├── debug │ │ │ └── AndroidManifest.xml │ │ │ ├── main │ │ │ ├── AndroidManifest.xml │ │ │ ├── kotlin │ │ │ │ └── example │ │ │ │ │ └── com │ │ │ │ │ └── example │ │ │ │ │ └── MainActivity.kt │ │ │ └── res │ │ │ │ ├── drawable-v21 │ │ │ │ └── launch_background.xml │ │ │ │ ├── drawable │ │ │ │ └── launch_background.xml │ │ │ │ ├── mipmap-hdpi │ │ │ │ └── ic_launcher.png │ │ │ │ ├── mipmap-mdpi │ │ │ │ └── ic_launcher.png │ │ │ │ ├── mipmap-xhdpi │ │ │ │ └── ic_launcher.png │ │ │ │ ├── mipmap-xxhdpi │ │ │ │ └── ic_launcher.png │ │ │ │ ├── mipmap-xxxhdpi │ │ │ │ └── ic_launcher.png │ │ │ │ ├── values-night │ │ │ │ └── styles.xml │ │ │ │ └── values │ │ │ │ └── styles.xml │ │ │ └── profile │ │ │ └── AndroidManifest.xml │ ├── build.gradle │ ├── gradle.properties │ ├── gradle │ │ └── wrapper │ │ │ └── gradle-wrapper.properties │ └── settings.gradle ├── ios │ ├── .gitignore │ ├── Flutter │ │ ├── AppFrameworkInfo.plist │ │ ├── Debug.xcconfig │ │ └── Release.xcconfig │ ├── Runner.xcodeproj │ │ ├── project.pbxproj │ │ ├── project.xcworkspace │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata │ │ │ │ ├── IDEWorkspaceChecks.plist │ │ │ │ └── WorkspaceSettings.xcsettings │ │ └── xcshareddata │ │ │ └── xcschemes │ │ │ └── Runner.xcscheme │ ├── Runner.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcshareddata │ │ │ ├── IDEWorkspaceChecks.plist │ │ │ └── WorkspaceSettings.xcsettings │ └── Runner │ │ ├── AppDelegate.swift │ │ ├── Assets.xcassets │ │ ├── AppIcon.appiconset │ │ │ ├── Contents.json │ │ │ ├── Icon-App-1024x1024@1x.png │ │ │ ├── Icon-App-20x20@1x.png │ │ │ ├── Icon-App-20x20@2x.png │ │ │ ├── Icon-App-20x20@3x.png │ │ │ ├── Icon-App-29x29@1x.png │ │ │ ├── Icon-App-29x29@2x.png │ │ │ ├── Icon-App-29x29@3x.png │ │ │ ├── Icon-App-40x40@1x.png │ │ │ ├── Icon-App-40x40@2x.png │ │ │ ├── Icon-App-40x40@3x.png │ │ │ ├── Icon-App-60x60@2x.png │ │ │ ├── Icon-App-60x60@3x.png │ │ │ ├── Icon-App-76x76@1x.png │ │ │ ├── Icon-App-76x76@2x.png │ │ │ └── Icon-App-83.5x83.5@2x.png │ │ └── LaunchImage.imageset │ │ │ ├── Contents.json │ │ │ ├── LaunchImage.png │ │ │ ├── LaunchImage@2x.png │ │ │ ├── LaunchImage@3x.png │ │ │ └── README.md │ │ ├── Base.lproj │ │ ├── LaunchScreen.storyboard │ │ └── Main.storyboard │ │ ├── Info.plist │ │ └── Runner-Bridging-Header.h ├── lib │ ├── example.dart │ └── example2.dart ├── pubspec.lock └── pubspec.yaml ├── lib └── state_persistence.dart ├── pubspec.lock └── pubspec.yaml /.flutter-plugins: -------------------------------------------------------------------------------- 1 | path_provider=C:\\Users\\Simon\\AppData\\Roaming\\Pub\\Cache\\hosted\\pub.dartlang.org\\path_provider-0.5.0+1\\ 2 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Miscellaneous 2 | *.class 3 | *.log 4 | *.pyc 5 | *.swp 6 | .DS_Store 7 | Thumbs.db 8 | .atom/ 9 | .buildlog/ 10 | .history 11 | .svn/ 12 | 13 | # IntelliJ related 14 | *.iml 15 | *.ipr 16 | *.iws 17 | .idea/ 18 | 19 | # Visual Studio Code related 20 | .vscode/ 21 | 22 | # Flutter/Dart/Pub related 23 | **/doc/api/ 24 | .dart_tool/ 25 | .flutter-plugins 26 | .packages 27 | .pub-cache/ 28 | .pub/ 29 | /build/ 30 | -------------------------------------------------------------------------------- /.metadata: -------------------------------------------------------------------------------- 1 | # This file tracks properties of this Flutter project. 2 | # Used by Flutter tool to assess capabilities and perform upgrades etc. 3 | # 4 | # This file should be version controlled and should not be manually edited. 5 | 6 | version: 7 | revision: e5b1ed7a7f7b85c1877e09a9495681f719be5578 8 | channel: beta 9 | 10 | project_type: package 11 | -------------------------------------------------------------------------------- /AUTHORS: -------------------------------------------------------------------------------- 1 | # Below is a list of people and organizations that have contributed 2 | # to this project. Names should be added to the list like so: 3 | # 4 | # Name/Organization 5 | 6 | Simon Lightfoot 7 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | ## 0.1.0 3 | * Add Null Safety 4 | 5 | ## 0.0.7 6 | * Add `clearDataOnLoadError` feature. 7 | * Improve error logging. 8 | 9 | ## 0.0.6 10 | * Revert `path` dependency to `1.6.2` 11 | 12 | ## 0.0.5 13 | * Added Flutter Community banner. 14 | 15 | ## 0.0.4 16 | * Fixed bug with unmodifiable initial data. 17 | 18 | ## 0.0.3 19 | * Added support for Initial Data. 20 | 21 | ## 0.0.2 22 | * Minor pub suggested improvements. 23 | 24 | ## 0.0.1 25 | * Initial version 26 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Simon Lightfoot 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | [![Flutter Community: state_persistence](https://fluttercommunity.dev/_github/header/state_persistence)](https://github.com/fluttercommunity/community) 2 | 3 | # State Persistence 4 | 5 | [![pub package](https://img.shields.io/pub/v/state_persistence.svg)](https://pub.dartlang.org/packages/state_persistence) 6 | 7 | Persist state across app launches. By default this library store 8 | state as a local JSON file called `data.json` in the applications 9 | data directory. You can change this filename by providing another 10 | storage mechanism. 11 | 12 | If you do not want to store your persisted app state as a JSON 13 | file you can extend `PersistedStateStorage` and provide your own 14 | methods for saving and loading data. E.g `shared_preferences` or 15 | `sqflite`. For those of you that are ambitious you could even 16 | store your state on the web or even in Firebase. 17 | 18 | To change the persisted state simply modify the values in the 19 | data map. These changes will automatically be persisted to disk 20 | based on the `saveTimeout` given to the `PersistedAppState` widget. 21 | By default this value is `500` milliseconds. This timeout is used 22 | to stop disk thrashing on multiple map changes in quick succession. 23 | 24 | ### Example 25 | 26 | ```dart 27 | import 'package:flutter/material.dart'; 28 | import 'package:state_persistence/state_persistence.dart'; 29 | 30 | void main() => runApp(App()); 31 | 32 | class App extends StatefulWidget { 33 | @override 34 | _AppState createState() => _AppState(); 35 | } 36 | 37 | class _AppState extends State { 38 | TextEditingController _textController; 39 | 40 | @override 41 | Widget build(BuildContext context) { 42 | return PersistedAppState( 43 | storage: JsonFileStorage(), 44 | child: MaterialApp( 45 | title: 'Persistent TextField Example', 46 | theme: ThemeData(primarySwatch: Colors.indigo), 47 | home: Scaffold( 48 | appBar: AppBar(title: Text('Persistent TextField Example')), 49 | body: Container( 50 | padding: const EdgeInsets.all(32.0), 51 | alignment: Alignment.center, 52 | child: PersistedStateBuilder( 53 | builder: (BuildContext context, AsyncSnapshot snapshot) { 54 | if (snapshot.hasData) { 55 | if (_textController == null) { 56 | _textController = TextEditingController(text: snapshot.data['text'] ?? ''); 57 | } 58 | return TextField( 59 | controller: _textController, 60 | decoration: InputDecoration( 61 | hintText: 'Enter some text', 62 | ), 63 | onChanged: (String value) => snapshot.data['text'] = value, 64 | ); 65 | } else { 66 | return CircularProgressIndicator(); 67 | } 68 | }, 69 | ), 70 | ), 71 | ), 72 | ), 73 | ); 74 | } 75 | } 76 | ``` 77 | -------------------------------------------------------------------------------- /example/.gitignore: -------------------------------------------------------------------------------- 1 | # Miscellaneous 2 | *.class 3 | *.log 4 | *.pyc 5 | *.swp 6 | .DS_Store 7 | Thumbs.db 8 | .atom/ 9 | .buildlog/ 10 | .history 11 | .svn/ 12 | 13 | # IntelliJ related 14 | *.iml 15 | *.ipr 16 | *.iws 17 | .idea/ 18 | 19 | # Visual Studio Code related 20 | .vscode/ 21 | 22 | # Flutter/Dart/Pub related 23 | **/doc/api/ 24 | .dart_tool/ 25 | .flutter-plugins 26 | .packages 27 | .pub-cache/ 28 | .pub/ 29 | /build/ 30 | 31 | # Android related 32 | **/android/**/gradle-wrapper.jar 33 | **/android/.gradle 34 | **/android/captures/ 35 | **/android/gradlew 36 | **/android/gradlew.bat 37 | **/android/local.properties 38 | **/android/**/GeneratedPluginRegistrant.java 39 | 40 | # iOS/XCode related 41 | **/ios/**/*.mode1v3 42 | **/ios/**/*.mode2v3 43 | **/ios/**/*.moved-aside 44 | **/ios/**/*.pbxuser 45 | **/ios/**/*.perspectivev3 46 | **/ios/**/*sync/ 47 | **/ios/**/.sconsign.dblite 48 | **/ios/**/.tags* 49 | **/ios/**/.vagrant/ 50 | **/ios/**/DerivedData/ 51 | **/ios/**/Icon? 52 | **/ios/**/Pods/ 53 | **/ios/**/.symlinks/ 54 | **/ios/**/profile 55 | **/ios/**/xcuserdata 56 | **/ios/.generated/ 57 | **/ios/Flutter/App.framework 58 | **/ios/Flutter/Flutter.framework 59 | **/ios/Flutter/Generated.xcconfig 60 | **/ios/Flutter/app.flx 61 | **/ios/Flutter/app.zip 62 | **/ios/Flutter/flutter_assets/ 63 | **/ios/ServiceDefinitions.json 64 | **/ios/Runner/GeneratedPluginRegistrant.* 65 | 66 | # Exceptions to above rules. 67 | !**/ios/**/default.mode1v3 68 | !**/ios/**/default.mode2v3 69 | !**/ios/**/default.pbxuser 70 | !**/ios/**/default.perspectivev3 71 | !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages 72 | 73 | .flutter-plugins-dependencies 74 | -------------------------------------------------------------------------------- /example/.metadata: -------------------------------------------------------------------------------- 1 | # This file tracks properties of this Flutter project. 2 | # Used by Flutter tool to assess capabilities and perform upgrades etc. 3 | # 4 | # This file should be version controlled and should not be manually edited. 5 | 6 | version: 7 | revision: e5b1ed7a7f7b85c1877e09a9495681f719be5578 8 | channel: beta 9 | 10 | project_type: app 11 | -------------------------------------------------------------------------------- /example/android/.gitignore: -------------------------------------------------------------------------------- 1 | gradle-wrapper.jar 2 | /.gradle 3 | /captures/ 4 | /gradlew 5 | /gradlew.bat 6 | /local.properties 7 | GeneratedPluginRegistrant.java 8 | 9 | # Remember to never publicly share your keystore. 10 | # See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app 11 | key.properties 12 | -------------------------------------------------------------------------------- /example/android/app/build.gradle: -------------------------------------------------------------------------------- 1 | def localProperties = new Properties() 2 | def localPropertiesFile = rootProject.file('local.properties') 3 | if (localPropertiesFile.exists()) { 4 | localPropertiesFile.withReader('UTF-8') { reader -> 5 | localProperties.load(reader) 6 | } 7 | } 8 | 9 | def flutterRoot = localProperties.getProperty('flutter.sdk') 10 | if (flutterRoot == null) { 11 | throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") 12 | } 13 | 14 | def flutterVersionCode = localProperties.getProperty('flutter.versionCode') 15 | if (flutterVersionCode == null) { 16 | flutterVersionCode = '1' 17 | } 18 | 19 | def flutterVersionName = localProperties.getProperty('flutter.versionName') 20 | if (flutterVersionName == null) { 21 | flutterVersionName = '1.0' 22 | } 23 | 24 | apply plugin: 'com.android.application' 25 | apply plugin: 'kotlin-android' 26 | apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" 27 | 28 | android { 29 | compileSdkVersion 30 30 | 31 | sourceSets { 32 | main.java.srcDirs += 'src/main/kotlin' 33 | } 34 | 35 | defaultConfig { 36 | // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). 37 | applicationId "example.com.example" 38 | minSdkVersion 16 39 | targetSdkVersion 30 40 | versionCode flutterVersionCode.toInteger() 41 | versionName flutterVersionName 42 | } 43 | 44 | buildTypes { 45 | release { 46 | // TODO: Add your own signing config for the release build. 47 | // Signing with the debug keys for now, so `flutter run --release` works. 48 | signingConfig signingConfigs.debug 49 | } 50 | } 51 | } 52 | 53 | flutter { 54 | source '../..' 55 | } 56 | 57 | dependencies { 58 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 59 | } 60 | -------------------------------------------------------------------------------- /example/android/app/src/debug/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /example/android/app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 6 | 13 | 17 | 21 | 26 | 30 | 31 | 32 | 33 | 34 | 35 | 37 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /example/android/app/src/main/kotlin/example/com/example/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package example.com.example 2 | 3 | import io.flutter.embedding.android.FlutterActivity 4 | 5 | class MainActivity: FlutterActivity() { 6 | } 7 | -------------------------------------------------------------------------------- /example/android/app/src/main/res/drawable-v21/launch_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 12 | 13 | -------------------------------------------------------------------------------- /example/android/app/src/main/res/drawable/launch_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 12 | 13 | -------------------------------------------------------------------------------- /example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fluttercommunity/state_persistence/6f0211228ecc985b3302c2579adcf5f6edee19f2/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fluttercommunity/state_persistence/6f0211228ecc985b3302c2579adcf5f6edee19f2/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fluttercommunity/state_persistence/6f0211228ecc985b3302c2579adcf5f6edee19f2/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fluttercommunity/state_persistence/6f0211228ecc985b3302c2579adcf5f6edee19f2/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fluttercommunity/state_persistence/6f0211228ecc985b3302c2579adcf5f6edee19f2/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /example/android/app/src/main/res/values-night/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 9 | 15 | 18 | 19 | -------------------------------------------------------------------------------- /example/android/app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 9 | 15 | 18 | 19 | -------------------------------------------------------------------------------- /example/android/app/src/profile/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /example/android/build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | ext.kotlin_version = '1.3.50' 3 | repositories { 4 | google() 5 | jcenter() 6 | } 7 | 8 | dependencies { 9 | classpath 'com.android.tools.build:gradle:4.1.0' 10 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 11 | } 12 | } 13 | 14 | allprojects { 15 | repositories { 16 | google() 17 | jcenter() 18 | } 19 | } 20 | 21 | rootProject.buildDir = '../build' 22 | subprojects { 23 | project.buildDir = "${rootProject.buildDir}/${project.name}" 24 | } 25 | subprojects { 26 | project.evaluationDependsOn(':app') 27 | } 28 | 29 | task clean(type: Delete) { 30 | delete rootProject.buildDir 31 | } 32 | -------------------------------------------------------------------------------- /example/android/gradle.properties: -------------------------------------------------------------------------------- 1 | org.gradle.jvmargs=-Xmx1536M 2 | android.useAndroidX=true 3 | android.enableJetifier=true 4 | -------------------------------------------------------------------------------- /example/android/gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Fri Jun 23 08:50:38 CEST 2017 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip 7 | -------------------------------------------------------------------------------- /example/android/settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | 3 | def localPropertiesFile = new File(rootProject.projectDir, "local.properties") 4 | def properties = new Properties() 5 | 6 | assert localPropertiesFile.exists() 7 | localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) } 8 | 9 | def flutterSdkPath = properties.getProperty("flutter.sdk") 10 | assert flutterSdkPath != null, "flutter.sdk not set in local.properties" 11 | apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle" 12 | -------------------------------------------------------------------------------- /example/ios/.gitignore: -------------------------------------------------------------------------------- 1 | *.mode1v3 2 | *.mode2v3 3 | *.moved-aside 4 | *.pbxuser 5 | *.perspectivev3 6 | **/*sync/ 7 | .sconsign.dblite 8 | .tags* 9 | **/.vagrant/ 10 | **/DerivedData/ 11 | Icon? 12 | **/Pods/ 13 | **/.symlinks/ 14 | profile 15 | xcuserdata 16 | **/.generated/ 17 | Flutter/App.framework 18 | Flutter/Flutter.framework 19 | Flutter/Flutter.podspec 20 | Flutter/Generated.xcconfig 21 | Flutter/app.flx 22 | Flutter/app.zip 23 | Flutter/flutter_assets/ 24 | Flutter/flutter_export_environment.sh 25 | ServiceDefinitions.json 26 | Runner/GeneratedPluginRegistrant.* 27 | 28 | # Exceptions to above rules. 29 | !default.mode1v3 30 | !default.mode2v3 31 | !default.pbxuser 32 | !default.perspectivev3 33 | -------------------------------------------------------------------------------- /example/ios/Flutter/AppFrameworkInfo.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | App 9 | CFBundleIdentifier 10 | io.flutter.flutter.app 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | App 15 | CFBundlePackageType 16 | FMWK 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1.0 23 | MinimumOSVersion 24 | 8.0 25 | 26 | 27 | -------------------------------------------------------------------------------- /example/ios/Flutter/Debug.xcconfig: -------------------------------------------------------------------------------- 1 | #include 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defaultConfigurationIsVisible = 0; 466 | defaultConfigurationName = Release; 467 | }; 468 | /* End XCConfigurationList section */ 469 | }; 470 | rootObject = 97C146E61CF9000F007C117D /* Project object */; 471 | } 472 | -------------------------------------------------------------------------------- /example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | PreviewsEnabled 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /example/ios/Runner.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | PreviewsEnabled 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /example/ios/Runner/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | import Flutter 3 | 4 | @UIApplicationMain 5 | @objc class AppDelegate: FlutterAppDelegate { 6 | override func application( 7 | _ application: UIApplication, 8 | didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? 9 | ) -> Bool { 10 | GeneratedPluginRegistrant.register(with: self) 11 | return super.application(application, didFinishLaunchingWithOptions: launchOptions) 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "size" : "20x20", 5 | "idiom" : "iphone", 6 | "filename" : "Icon-App-20x20@2x.png", 7 | "scale" : "2x" 8 | }, 9 | { 10 | "size" : "20x20", 11 | "idiom" : "iphone", 12 | "filename" : "Icon-App-20x20@3x.png", 13 | "scale" : "3x" 14 | }, 15 | { 16 | "size" : "29x29", 17 | "idiom" : "iphone", 18 | "filename" : "Icon-App-29x29@1x.png", 19 | "scale" : "1x" 20 | }, 21 | { 22 | "size" : "29x29", 23 | "idiom" : "iphone", 24 | "filename" : "Icon-App-29x29@2x.png", 25 | "scale" : "2x" 26 | }, 27 | { 28 | "size" : "29x29", 29 | "idiom" : "iphone", 30 | "filename" : "Icon-App-29x29@3x.png", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "size" : "40x40", 35 | "idiom" : "iphone", 36 | "filename" : "Icon-App-40x40@2x.png", 37 | "scale" : "2x" 38 | }, 39 | { 40 | "size" : "40x40", 41 | "idiom" : "iphone", 42 | "filename" : "Icon-App-40x40@3x.png", 43 | "scale" : "3x" 44 | }, 45 | { 46 | "size" : "60x60", 47 | "idiom" : "iphone", 48 | "filename" : "Icon-App-60x60@2x.png", 49 | "scale" : "2x" 50 | }, 51 | { 52 | "size" : "60x60", 53 | "idiom" : "iphone", 54 | "filename" : "Icon-App-60x60@3x.png", 55 | "scale" : "3x" 56 | }, 57 | { 58 | "size" : "20x20", 59 | "idiom" : "ipad", 60 | "filename" : "Icon-App-20x20@1x.png", 61 | "scale" : "1x" 62 | }, 63 | { 64 | "size" : "20x20", 65 | "idiom" : "ipad", 66 | "filename" : "Icon-App-20x20@2x.png", 67 | "scale" : "2x" 68 | }, 69 | { 70 | "size" : "29x29", 71 | "idiom" : "ipad", 72 | "filename" : "Icon-App-29x29@1x.png", 73 | "scale" : "1x" 74 | }, 75 | { 76 | "size" : "29x29", 77 | "idiom" : "ipad", 78 | "filename" : "Icon-App-29x29@2x.png", 79 | "scale" : "2x" 80 | }, 81 | { 82 | "size" : "40x40", 83 | "idiom" : "ipad", 84 | "filename" : "Icon-App-40x40@1x.png", 85 | "scale" : "1x" 86 | }, 87 | { 88 | "size" : "40x40", 89 | "idiom" : "ipad", 90 | "filename" : "Icon-App-40x40@2x.png", 91 | "scale" : "2x" 92 | }, 93 | { 94 | "size" : "76x76", 95 | "idiom" : "ipad", 96 | "filename" : "Icon-App-76x76@1x.png", 97 | "scale" : "1x" 98 | }, 99 | { 100 | "size" : "76x76", 101 | "idiom" : "ipad", 102 | "filename" : "Icon-App-76x76@2x.png", 103 | "scale" : "2x" 104 | }, 105 | { 106 | "size" : "83.5x83.5", 107 | "idiom" : "ipad", 108 | "filename" : "Icon-App-83.5x83.5@2x.png", 109 | "scale" : "2x" 110 | }, 111 | { 112 | "size" : "1024x1024", 113 | "idiom" : "ios-marketing", 114 | "filename" : "Icon-App-1024x1024@1x.png", 115 | "scale" : "1x" 116 | } 117 | ], 118 | "info" : { 119 | "version" : 1, 120 | "author" : "xcode" 121 | } 122 | } 123 | -------------------------------------------------------------------------------- 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4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | -------------------------------------------------------------------------------- /example/ios/Runner/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | -------------------------------------------------------------------------------- /example/ios/Runner/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | example 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | $(FLUTTER_BUILD_NAME) 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | $(FLUTTER_BUILD_NUMBER) 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UISupportedInterfaceOrientations 30 | 31 | UIInterfaceOrientationPortrait 32 | UIInterfaceOrientationLandscapeLeft 33 | UIInterfaceOrientationLandscapeRight 34 | 35 | UISupportedInterfaceOrientations~ipad 36 | 37 | UIInterfaceOrientationPortrait 38 | UIInterfaceOrientationPortraitUpsideDown 39 | UIInterfaceOrientationLandscapeLeft 40 | UIInterfaceOrientationLandscapeRight 41 | 42 | UIViewControllerBasedStatusBarAppearance 43 | 44 | 45 | 46 | -------------------------------------------------------------------------------- /example/ios/Runner/Runner-Bridging-Header.h: -------------------------------------------------------------------------------- 1 | #import "GeneratedPluginRegistrant.h" 2 | -------------------------------------------------------------------------------- /example/lib/example.dart: -------------------------------------------------------------------------------- 1 | import 'package:flutter/material.dart'; 2 | import 'package:state_persistence/state_persistence.dart'; 3 | 4 | void main() => runApp(App()); 5 | 6 | class App extends StatelessWidget { 7 | @override 8 | Widget build(BuildContext context) { 9 | return PersistedAppState( 10 | storage: JsonFileStorage(initialData: { 11 | 'tab': 1, 12 | }), 13 | child: MaterialApp( 14 | title: 'Persistent Tab Example', 15 | theme: ThemeData(primarySwatch: Colors.blue), 16 | home: ExampleScreen1(), 17 | ), 18 | ); 19 | } 20 | } 21 | 22 | class ExampleScreen1 extends StatefulWidget { 23 | @override 24 | _ExampleScreen1State createState() => _ExampleScreen1State(); 25 | } 26 | 27 | class _ExampleScreen1State extends State with SingleTickerProviderStateMixin { 28 | PersistedData? _data; 29 | TabController? _controller; 30 | 31 | @override 32 | void didChangeDependencies() { 33 | super.didChangeDependencies(); 34 | final data = _data = PersistedAppState.of(context); 35 | if (data != null && _controller == null) { 36 | _controller = TabController(initialIndex: data['tab'] ?? 0, vsync: this, length: 4); 37 | _controller!.addListener(_onTabChanged); 38 | } 39 | } 40 | 41 | void _onTabChanged() { 42 | if (!_controller!.indexIsChanging) { 43 | _data!['tab'] = _controller!.index; 44 | } 45 | } 46 | 47 | @override 48 | void dispose() { 49 | _controller?.removeListener(_onTabChanged); 50 | _controller?.dispose(); 51 | super.dispose(); 52 | } 53 | 54 | @override 55 | Widget build(BuildContext context) { 56 | if (_data != null) { 57 | return Scaffold( 58 | appBar: AppBar( 59 | title: Text('Persistent Tab Example'), 60 | bottom: TabBar( 61 | controller: _controller, 62 | tabs: [ 63 | Tab(text: 'First'), 64 | Tab(text: 'Second'), 65 | Tab(text: 'Third'), 66 | Tab(text: 'Forth'), 67 | ], 68 | ), 69 | ), 70 | body: TabBarView( 71 | controller: _controller, 72 | children: [ 73 | Center(child: Text('Tab 1')), 74 | Center(child: Text('Tab 2')), 75 | Center(child: Text('Tab 3')), 76 | Center(child: Text('Tab 4')), 77 | ], 78 | ), 79 | ); 80 | } else { 81 | return Center(child: CircularProgressIndicator()); 82 | } 83 | } 84 | } 85 | -------------------------------------------------------------------------------- /example/lib/example2.dart: -------------------------------------------------------------------------------- 1 | import 'package:flutter/material.dart'; 2 | import 'package:state_persistence/state_persistence.dart'; 3 | 4 | void main() => runApp(App()); 5 | 6 | class App extends StatefulWidget { 7 | @override 8 | _AppState createState() => _AppState(); 9 | } 10 | 11 | class _AppState extends State { 12 | TextEditingController? _textController; 13 | 14 | @override 15 | Widget build(BuildContext context) { 16 | return PersistedAppState( 17 | storage: JsonFileStorage(), 18 | child: MaterialApp( 19 | title: 'Persistent TextField Example', 20 | theme: ThemeData(primarySwatch: Colors.indigo), 21 | home: Scaffold( 22 | appBar: AppBar(title: Text('Persistent TextField Example')), 23 | body: Container( 24 | padding: const EdgeInsets.all(32.0), 25 | alignment: Alignment.center, 26 | child: PersistedStateBuilder( 27 | builder: (BuildContext context, AsyncSnapshot snapshot) { 28 | final data = snapshot.data; 29 | if (data != null) { 30 | if (_textController == null) { 31 | _textController = TextEditingController(text: data['text'] ?? ''); 32 | } 33 | return TextField( 34 | controller: _textController, 35 | decoration: InputDecoration( 36 | hintText: 'Enter some text', 37 | ), 38 | onChanged: (String value) => data['text'] = value, 39 | ); 40 | } else { 41 | return CircularProgressIndicator(); 42 | } 43 | }, 44 | ), 45 | ), 46 | ), 47 | ), 48 | ); 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /example/pubspec.lock: -------------------------------------------------------------------------------- 1 | # Generated by pub 2 | # See https://dart.dev/tools/pub/glossary#lockfile 3 | packages: 4 | async: 5 | dependency: transitive 6 | description: 7 | name: async 8 | url: "https://pub.dartlang.org" 9 | source: hosted 10 | version: "2.5.0" 11 | boolean_selector: 12 | dependency: transitive 13 | description: 14 | name: boolean_selector 15 | url: "https://pub.dartlang.org" 16 | source: hosted 17 | version: "2.1.0" 18 | characters: 19 | dependency: transitive 20 | description: 21 | name: characters 22 | url: "https://pub.dartlang.org" 23 | source: hosted 24 | version: "1.1.0" 25 | charcode: 26 | dependency: transitive 27 | description: 28 | name: charcode 29 | url: "https://pub.dartlang.org" 30 | source: hosted 31 | version: "1.2.0" 32 | clock: 33 | dependency: transitive 34 | description: 35 | name: clock 36 | url: "https://pub.dartlang.org" 37 | source: hosted 38 | version: "1.1.0" 39 | collection: 40 | dependency: transitive 41 | description: 42 | name: collection 43 | url: "https://pub.dartlang.org" 44 | source: hosted 45 | version: "1.15.0" 46 | fake_async: 47 | dependency: transitive 48 | description: 49 | name: fake_async 50 | url: "https://pub.dartlang.org" 51 | source: hosted 52 | version: "1.2.0" 53 | ffi: 54 | dependency: transitive 55 | description: 56 | name: ffi 57 | url: "https://pub.dartlang.org" 58 | source: hosted 59 | version: "1.0.0" 60 | file: 61 | dependency: transitive 62 | description: 63 | name: file 64 | url: "https://pub.dartlang.org" 65 | source: hosted 66 | version: "6.1.0" 67 | flutter: 68 | dependency: "direct main" 69 | description: flutter 70 | source: sdk 71 | version: "0.0.0" 72 | flutter_test: 73 | dependency: "direct dev" 74 | description: flutter 75 | source: sdk 76 | version: "0.0.0" 77 | matcher: 78 | dependency: transitive 79 | description: 80 | name: matcher 81 | url: "https://pub.dartlang.org" 82 | source: hosted 83 | version: "0.12.10" 84 | meta: 85 | dependency: transitive 86 | description: 87 | name: meta 88 | url: "https://pub.dartlang.org" 89 | source: hosted 90 | version: "1.3.0" 91 | path: 92 | dependency: transitive 93 | description: 94 | name: path 95 | url: "https://pub.dartlang.org" 96 | source: hosted 97 | version: "1.8.0" 98 | path_provider: 99 | dependency: transitive 100 | description: 101 | name: path_provider 102 | url: "https://pub.dartlang.org" 103 | source: hosted 104 | version: "2.0.1" 105 | path_provider_linux: 106 | dependency: transitive 107 | description: 108 | name: path_provider_linux 109 | url: "https://pub.dartlang.org" 110 | source: hosted 111 | version: "2.0.0" 112 | path_provider_macos: 113 | dependency: transitive 114 | description: 115 | name: path_provider_macos 116 | url: "https://pub.dartlang.org" 117 | source: hosted 118 | version: "2.0.0" 119 | path_provider_platform_interface: 120 | dependency: transitive 121 | description: 122 | name: path_provider_platform_interface 123 | url: "https://pub.dartlang.org" 124 | source: hosted 125 | version: "2.0.1" 126 | path_provider_windows: 127 | dependency: transitive 128 | description: 129 | name: path_provider_windows 130 | url: "https://pub.dartlang.org" 131 | source: hosted 132 | version: "2.0.0" 133 | platform: 134 | dependency: transitive 135 | description: 136 | name: platform 137 | url: "https://pub.dartlang.org" 138 | source: hosted 139 | version: "3.0.0" 140 | plugin_platform_interface: 141 | dependency: transitive 142 | description: 143 | name: plugin_platform_interface 144 | url: "https://pub.dartlang.org" 145 | source: hosted 146 | version: "2.0.0" 147 | process: 148 | dependency: transitive 149 | description: 150 | name: process 151 | url: "https://pub.dartlang.org" 152 | source: hosted 153 | version: "4.1.0" 154 | sky_engine: 155 | dependency: transitive 156 | description: flutter 157 | source: sdk 158 | version: "0.0.99" 159 | source_span: 160 | dependency: transitive 161 | description: 162 | name: source_span 163 | url: "https://pub.dartlang.org" 164 | source: hosted 165 | version: "1.8.1" 166 | stack_trace: 167 | dependency: transitive 168 | description: 169 | name: stack_trace 170 | url: "https://pub.dartlang.org" 171 | source: hosted 172 | version: "1.10.0" 173 | state_persistence: 174 | dependency: "direct main" 175 | description: 176 | path: ".." 177 | relative: true 178 | source: path 179 | version: "0.1.0" 180 | stream_channel: 181 | dependency: transitive 182 | description: 183 | name: stream_channel 184 | url: "https://pub.dartlang.org" 185 | source: hosted 186 | version: "2.1.0" 187 | string_scanner: 188 | dependency: transitive 189 | description: 190 | name: string_scanner 191 | url: "https://pub.dartlang.org" 192 | source: hosted 193 | version: "1.1.0" 194 | term_glyph: 195 | dependency: transitive 196 | description: 197 | name: term_glyph 198 | url: "https://pub.dartlang.org" 199 | source: hosted 200 | version: "1.2.0" 201 | test_api: 202 | dependency: transitive 203 | description: 204 | name: test_api 205 | url: "https://pub.dartlang.org" 206 | source: hosted 207 | version: "0.2.19" 208 | typed_data: 209 | dependency: transitive 210 | description: 211 | name: typed_data 212 | url: "https://pub.dartlang.org" 213 | source: hosted 214 | version: "1.3.0" 215 | vector_math: 216 | dependency: transitive 217 | description: 218 | name: vector_math 219 | url: "https://pub.dartlang.org" 220 | source: hosted 221 | version: "2.1.0" 222 | win32: 223 | dependency: transitive 224 | description: 225 | name: win32 226 | url: "https://pub.dartlang.org" 227 | source: hosted 228 | version: "2.0.4" 229 | xdg_directories: 230 | dependency: transitive 231 | description: 232 | name: xdg_directories 233 | url: "https://pub.dartlang.org" 234 | source: hosted 235 | version: "0.2.0" 236 | sdks: 237 | dart: ">=2.12.0 <3.0.0" 238 | flutter: ">=1.20.0" 239 | -------------------------------------------------------------------------------- /example/pubspec.yaml: -------------------------------------------------------------------------------- 1 | name: example 2 | description: A new Flutter project. 3 | version: 1.0.0+1 4 | 5 | environment: 6 | sdk: ">=2.12.0 <3.0.0" 7 | 8 | dependencies: 9 | state_persistence: 10 | path: ../ 11 | flutter: 12 | sdk: flutter 13 | 14 | dev_dependencies: 15 | flutter_test: 16 | sdk: flutter 17 | 18 | flutter: 19 | uses-material-design: true 20 | -------------------------------------------------------------------------------- /lib/state_persistence.dart: -------------------------------------------------------------------------------- 1 | library state_persistence; 2 | 3 | import 'dart:async' show Future, Timer; 4 | import 'dart:collection' show MapBase; 5 | import 'dart:convert' show json, JsonCodec; 6 | import 'dart:io' show Directory, File; 7 | 8 | import 'package:flutter/material.dart'; 9 | import 'package:path/path.dart' as p; 10 | import 'package:path_provider/path_provider.dart' show getApplicationDocumentsDirectory; 11 | 12 | Directory? _appDataDir; 13 | 14 | /// Add to your widget hierarchy to add app-wide state persistence. 15 | class PersistedAppState extends StatefulWidget { 16 | const PersistedAppState({ 17 | Key? key, 18 | this.storage = const JsonFileStorage(), 19 | this.saveTimeout = const Duration(milliseconds: 500), 20 | required this.child, 21 | }) : super(key: key); 22 | 23 | /// Storage mechanism used to load/save app state. 24 | final PersistedStateStorage storage; 25 | 26 | /// When this timeout period expires the changed state is saved. 27 | /// This stops calling save on many minor changes. 28 | final Duration saveTimeout; 29 | 30 | /// Child Widget 31 | final Widget child; 32 | 33 | /// Used to fetch persisted data anywhere across the app. 34 | /// Results in null if data is not yet loaded. 35 | static PersistedData? of(BuildContext context) => snapshot(context)?.data; 36 | 37 | /// Used to fetch the AsyncSnapshot of the persisted data. 38 | /// This allows you to monitor the progress of the loading data. 39 | static AsyncSnapshot? snapshot(BuildContext context) { 40 | return context.dependOnInheritedWidgetOfExactType<_PersistedScope>()?.snapshot; 41 | } 42 | 43 | @override 44 | _PersistedAppState createState() => _PersistedAppState(); 45 | } 46 | 47 | class _PersistedAppState extends State { 48 | late Future _future; 49 | PersistedData? _data; 50 | 51 | @override 52 | void initState() { 53 | super.initState(); 54 | _loadData(); 55 | } 56 | 57 | @override 58 | void didUpdateWidget(PersistedAppState oldWidget) { 59 | super.didUpdateWidget(oldWidget); 60 | if (oldWidget.storage != widget.storage) { 61 | _loadData(); 62 | } 63 | } 64 | 65 | void _loadData() { 66 | _future = PersistedData.load(widget.storage, widget.saveTimeout).then( 67 | (PersistedData result) => _data = result, 68 | ); 69 | } 70 | 71 | @override 72 | Widget build(BuildContext context) { 73 | return FutureBuilder( 74 | initialData: _data, 75 | future: _future, 76 | builder: (BuildContext context, AsyncSnapshot snapshot) { 77 | return _PersistedScope( 78 | snapshot: snapshot, 79 | child: widget.child, 80 | ); 81 | }, 82 | ); 83 | } 84 | } 85 | 86 | class _PersistedScope extends InheritedWidget { 87 | const _PersistedScope({ 88 | Key? key, 89 | required this.snapshot, 90 | required Widget child, 91 | }) : super(key: key, child: child); 92 | 93 | final AsyncSnapshot snapshot; 94 | 95 | @override 96 | bool updateShouldNotify(_PersistedScope old) => old.snapshot != snapshot; 97 | } 98 | 99 | /// You can use this builder to access the current persisted data. 100 | /// It will automatically rebuild when the persisted data is loaded. 101 | class PersistedStateBuilder extends StatelessWidget { 102 | const PersistedStateBuilder({ 103 | Key? key, 104 | required this.builder, 105 | }) : super(key: key); 106 | 107 | final AsyncWidgetBuilder builder; 108 | 109 | @override 110 | Widget build(BuildContext context) { 111 | return builder(context, PersistedAppState.snapshot(context)!); 112 | } 113 | } 114 | 115 | /// Accessed as a map so you can store key/value pairs of data. 116 | /// Values are dynamic allowing you do store information in multiple depths. 117 | /// This however doesn't guarantee the storage mechanism will save/load multiple depths. 118 | class PersistedData extends MapBase { 119 | PersistedData._(this._storage, this._data, this._saveTimeout); 120 | 121 | final PersistedStateStorage _storage; 122 | final Map? _data; 123 | final Duration _saveTimeout; 124 | Timer? _saveTask; 125 | 126 | static Future load(PersistedStateStorage storage, Duration saveTimeout) async { 127 | return PersistedData._( 128 | storage, 129 | await storage.load().catchError((e, st) { 130 | FlutterError.reportError(FlutterErrorDetails( 131 | exception: e, 132 | stack: st, 133 | library: 'state_persistence', 134 | silent: true, 135 | )); 136 | }), 137 | saveTimeout, 138 | ); 139 | } 140 | 141 | @override 142 | Iterable get keys => _data!.keys; 143 | 144 | @override 145 | dynamic operator [](Object? key) { 146 | return _data![key as String]; 147 | } 148 | 149 | @override 150 | void operator []=(String key, dynamic value) { 151 | _data![key] = value; 152 | persist(); 153 | } 154 | 155 | @override 156 | dynamic remove(Object? key) { 157 | final value = _data!.remove(key); 158 | persist(); 159 | return value; 160 | } 161 | 162 | @override 163 | void clear() { 164 | _data!.clear(); 165 | persist(); 166 | } 167 | 168 | void persist() { 169 | _saveTask?.cancel(); 170 | _saveTask = Timer(_saveTimeout, () { 171 | _storage.save(_data).catchError((e, st) { 172 | FlutterError.reportError(FlutterErrorDetails( 173 | exception: e, 174 | stack: st, 175 | library: 'state_persistence', 176 | silent: true, 177 | )); 178 | }); 179 | }); 180 | } 181 | } 182 | 183 | /// Extend this class to provide your own persisted storage mechanism. 184 | abstract class PersistedStateStorage { 185 | const PersistedStateStorage(); 186 | 187 | Future?> load(); 188 | 189 | Future save(Map? data); 190 | 191 | Future clear(); 192 | } 193 | 194 | /// Uses the default [JsonCodec], to store the persisted state. 195 | class JsonFileStorage extends PersistedStateStorage { 196 | const JsonFileStorage({ 197 | this.filename = 'data.json', 198 | this.initialData = const {}, 199 | this.clearDataOnLoadError = false, 200 | }); 201 | 202 | final String filename; 203 | final Map initialData; 204 | final bool clearDataOnLoadError; 205 | 206 | Future get stateFile async { 207 | _appDataDir ??= await getApplicationDocumentsDirectory(); 208 | return File(p.join(_appDataDir!.path, filename)); 209 | } 210 | 211 | @override 212 | Future?> load() async { 213 | final file = await stateFile; 214 | if (await file.exists()) { 215 | try { 216 | return json.decode(await file.readAsString()); 217 | } catch (e, st) { 218 | if (clearDataOnLoadError) { 219 | await clear(); 220 | } 221 | FlutterError.reportError(FlutterErrorDetails( 222 | exception: e, 223 | stack: st, 224 | library: 'state_persistence', 225 | silent: true, 226 | )); 227 | } 228 | } 229 | return Map.from(initialData); 230 | } 231 | 232 | @override 233 | Future save(Map? data) { 234 | return stateFile.then((file) => file.writeAsString(json.encode(data))); 235 | } 236 | 237 | @override 238 | Future clear() { 239 | return stateFile.then((file) => file.delete()); 240 | } 241 | 242 | @override 243 | bool operator ==(Object other) { 244 | return identical(this, other) || 245 | other is JsonFileStorage && runtimeType == other.runtimeType && filename == other.filename; 246 | } 247 | 248 | @override 249 | int get hashCode => filename.hashCode; 250 | } 251 | -------------------------------------------------------------------------------- /pubspec.lock: -------------------------------------------------------------------------------- 1 | # Generated by pub 2 | # See https://dart.dev/tools/pub/glossary#lockfile 3 | packages: 4 | async: 5 | dependency: transitive 6 | description: 7 | name: async 8 | url: "https://pub.dartlang.org" 9 | source: hosted 10 | version: "2.5.0" 11 | boolean_selector: 12 | dependency: transitive 13 | description: 14 | name: boolean_selector 15 | url: "https://pub.dartlang.org" 16 | source: hosted 17 | version: "2.1.0" 18 | characters: 19 | dependency: transitive 20 | description: 21 | name: characters 22 | url: "https://pub.dartlang.org" 23 | source: hosted 24 | version: "1.1.0" 25 | charcode: 26 | dependency: transitive 27 | description: 28 | name: charcode 29 | url: "https://pub.dartlang.org" 30 | source: hosted 31 | version: "1.2.0" 32 | clock: 33 | dependency: transitive 34 | description: 35 | name: clock 36 | url: "https://pub.dartlang.org" 37 | source: hosted 38 | version: "1.1.0" 39 | collection: 40 | dependency: transitive 41 | description: 42 | name: collection 43 | url: "https://pub.dartlang.org" 44 | source: hosted 45 | version: "1.15.0" 46 | fake_async: 47 | dependency: transitive 48 | description: 49 | name: fake_async 50 | url: "https://pub.dartlang.org" 51 | source: hosted 52 | version: "1.2.0" 53 | ffi: 54 | dependency: transitive 55 | description: 56 | name: ffi 57 | url: "https://pub.dartlang.org" 58 | source: hosted 59 | version: "1.0.0" 60 | file: 61 | dependency: transitive 62 | description: 63 | name: file 64 | url: "https://pub.dartlang.org" 65 | source: hosted 66 | version: "6.1.0" 67 | flutter: 68 | dependency: "direct main" 69 | description: flutter 70 | source: sdk 71 | version: "0.0.0" 72 | flutter_test: 73 | dependency: "direct dev" 74 | description: flutter 75 | source: sdk 76 | version: "0.0.0" 77 | matcher: 78 | dependency: transitive 79 | description: 80 | name: matcher 81 | url: "https://pub.dartlang.org" 82 | source: hosted 83 | version: "0.12.10" 84 | meta: 85 | dependency: transitive 86 | description: 87 | name: meta 88 | url: "https://pub.dartlang.org" 89 | source: hosted 90 | version: "1.3.0" 91 | path: 92 | dependency: "direct main" 93 | description: 94 | name: path 95 | url: "https://pub.dartlang.org" 96 | source: hosted 97 | version: "1.8.0" 98 | path_provider: 99 | dependency: "direct main" 100 | description: 101 | name: path_provider 102 | url: "https://pub.dartlang.org" 103 | source: hosted 104 | version: "2.0.1" 105 | path_provider_linux: 106 | dependency: transitive 107 | description: 108 | name: path_provider_linux 109 | url: "https://pub.dartlang.org" 110 | source: hosted 111 | version: "2.0.0" 112 | path_provider_macos: 113 | dependency: transitive 114 | description: 115 | name: path_provider_macos 116 | url: "https://pub.dartlang.org" 117 | source: hosted 118 | version: "2.0.0" 119 | path_provider_platform_interface: 120 | dependency: transitive 121 | description: 122 | name: path_provider_platform_interface 123 | url: "https://pub.dartlang.org" 124 | source: hosted 125 | version: "2.0.1" 126 | path_provider_windows: 127 | dependency: transitive 128 | description: 129 | name: path_provider_windows 130 | url: "https://pub.dartlang.org" 131 | source: hosted 132 | version: "2.0.0" 133 | platform: 134 | dependency: transitive 135 | description: 136 | name: platform 137 | url: "https://pub.dartlang.org" 138 | source: hosted 139 | version: "3.0.0" 140 | plugin_platform_interface: 141 | dependency: transitive 142 | description: 143 | name: plugin_platform_interface 144 | url: "https://pub.dartlang.org" 145 | source: hosted 146 | version: "2.0.0" 147 | process: 148 | dependency: transitive 149 | description: 150 | name: process 151 | url: "https://pub.dartlang.org" 152 | source: hosted 153 | version: "4.1.0" 154 | sky_engine: 155 | dependency: transitive 156 | description: flutter 157 | source: sdk 158 | version: "0.0.99" 159 | source_span: 160 | dependency: transitive 161 | description: 162 | name: source_span 163 | url: "https://pub.dartlang.org" 164 | source: hosted 165 | version: "1.8.1" 166 | stack_trace: 167 | dependency: transitive 168 | description: 169 | name: stack_trace 170 | url: "https://pub.dartlang.org" 171 | source: hosted 172 | version: "1.10.0" 173 | stream_channel: 174 | dependency: transitive 175 | description: 176 | name: stream_channel 177 | url: "https://pub.dartlang.org" 178 | source: hosted 179 | version: "2.1.0" 180 | string_scanner: 181 | dependency: transitive 182 | description: 183 | name: string_scanner 184 | url: "https://pub.dartlang.org" 185 | source: hosted 186 | version: "1.1.0" 187 | term_glyph: 188 | dependency: transitive 189 | description: 190 | name: term_glyph 191 | url: "https://pub.dartlang.org" 192 | source: hosted 193 | version: "1.2.0" 194 | test_api: 195 | dependency: transitive 196 | description: 197 | name: test_api 198 | url: "https://pub.dartlang.org" 199 | source: hosted 200 | version: "0.2.19" 201 | typed_data: 202 | dependency: transitive 203 | description: 204 | name: typed_data 205 | url: "https://pub.dartlang.org" 206 | source: hosted 207 | version: "1.3.0" 208 | vector_math: 209 | dependency: transitive 210 | description: 211 | name: vector_math 212 | url: "https://pub.dartlang.org" 213 | source: hosted 214 | version: "2.1.0" 215 | win32: 216 | dependency: transitive 217 | description: 218 | name: win32 219 | url: "https://pub.dartlang.org" 220 | source: hosted 221 | version: "2.0.4" 222 | xdg_directories: 223 | dependency: transitive 224 | description: 225 | name: xdg_directories 226 | url: "https://pub.dartlang.org" 227 | source: hosted 228 | version: "0.2.0" 229 | sdks: 230 | dart: ">=2.12.0 <3.0.0" 231 | flutter: ">=1.20.0" 232 | -------------------------------------------------------------------------------- /pubspec.yaml: -------------------------------------------------------------------------------- 1 | name: state_persistence 2 | description: Persist state across app launches. By default this library store 3 | state as a local JSON file called `data.json` in the applications 4 | data directory. 5 | version: 0.1.0 6 | homepage: https://github.com/fluttercommunity/state_persistence 7 | maintainer: Simon Lightfoot (@slightfoot) 8 | 9 | environment: 10 | sdk: '>=2.12.0 <3.0.0' 11 | 12 | dependencies: 13 | path: ^1.8.0 14 | path_provider: ^2.0.1 15 | flutter: 16 | sdk: flutter 17 | 18 | dev_dependencies: 19 | flutter_test: 20 | sdk: flutter 21 | --------------------------------------------------------------------------------