on_upgrade 1.2.0

Local upgrade checker plugin. Provides the ability to compare the currently running app version against a saved one.

OnUpgrade

A simple upgrade checker plugin, to e.g. migrate data between app upgrades or to display a change log with new features to your users.

Features

• Contains a default implementation using the shared preferences of the platform to persist the last known version
• Minimal effort to check if an app upgrade is given and to update the persisted value
• Possibility to implement custom getters and setters for the persisted version (e.g. if the last known app version is already available via a database)
• Helper to easily execute all fitting / relevant upgrades

Usage

Getting Started

Add this to your package's pubspec.yaml file:

dependencies:
  on_upgrade: ^1.2.0

More information on pub.dev.

Examples

For full examples please see the example app.

Default Implementation

final onUpgrade = OnUpgrade();
final isNewVersion = await onUpgrade.isNewVersion();
if (isNewVersion.state == UpgradeState.upgrade) {
  myDataMigrationOrNewFeatureDialog(isNewVersion.currentVersion!);
  await onUpgrade.updateLastVersion();
}

void myDataMigrationOrNewFeatureDialog(String version) {
  ...
}

Execute managed / multiple upgrades

final upgrades = {
  '1.0.0': myDataMigrationOrNewFeatureDialogForVersion1,
  '1.5.0': myDataMigrationOrNewFeatureDialogForVersion15
};

final onMultipleUpgrade = OnUpgrade();
final isNewVersionMultiple = await onMultipleUpgrade.isNewVersion();
if (isNewVersionMultiple.state == UpgradeState.upgrade) {
  await isNewVersionMultiple.executeUpgrades(upgrades);
  await onMultipleUpgrade.updateLastVersion();
}

Future<void> myDataMigrationOrNewFeatureDialogForVersion1() async {
  // Upgrade method can be async
}

void myDataMigrationOrNewFeatureDialogForVersion15() {
  // Upgrade method can be sync
}

Custom Implementation

Future<String> customVersionGetter() async {
    // Your implementation. Load the last known version.
    // Must return an empty string if no initial version is known (on the first app start, before updateLastVersion() was called the first time).
}

Future<bool> customVersionSetter([String? version]) async {
    // Your implementation. Update the last known version.
    // Perform the upgrade check before calling this function.
}

final onUpgradeCustom = OnUpgrade(customVersionUpdate: customVersionSetter, customVersionLookup: customVersionGetter);
final isCustomNewVersion = await onUpgradeCustom.isNewVersion();
if (isCustomNewVersion.state == UpgradeState.upgrade) {
  myDataMigrationOrNewFeatureDialog(isCustomNewVersion.currentVersion!);
  await onUpgrade.updateLastVersion();
}

void myDataMigrationOrNewFeatureDialog(String version) {
  ...
}

How to contribute

If you are interested in contributing, please have a look into the contribution guide. Every idea, bug report or line of code is heavily appreciated.