on_upgrade 1.0.0-nullsafety.3

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

OnUpgrade

Local upgrade checker plugin for Flutter. Enables the developer to easily migrate data between upgrades or to show users a new features dialog.

Features

A simple upgrade checker to migrate data between app updates or to display a change log with new features to your users.

• Contains a default implementation using the shared preferences of the platform to persist the last known version
• Minimal effort to check if an app update is given and to updated the persisted values
• Possibility to implement custom getters and setters for the persisted version interaction (e.g. if the last known app version is already available via a database)

Usage

Getting Started

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

dependencies:
  on_upgrade: ^0.1.1

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) {
  await onUpgrade.updateLastVersion();
  myDataMigration(isNewVersion.currentVersion);
  myShowUserNewFeaturesDialog(isNewVersion.currentVersion);
}

Custom Implementation

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

Future<bool> _customVersionSetter([String version]) async {
    // Your implementation. Update the last known version, after performing the upgrade check and starting all migration / information actions.
}

final onUpgradeCustom = OnUpgrade(customVersionUpdate: _customVersionSetter, customVersionLookup: _customVersionGetter);
final isNewVersion = await _onUpgradeCustom.isNewVersion();
if (isNewVersion.state == UpgradeState.upgrade) {
  await _onUpgradeCustom.updateLastVersion();
  myDataMigration(isNewVersion.currentVersion);
  myShowUserNewFeaturesDialog(isNewVersion.currentVersion);
}