optimizely_dart 0.1.7

Flutter plugin for Optimizely native SDKs. Check feature flags and feature variables from your Optimizely project.

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:optimizely_dart/optimizely_dart.dart';

Future<void> main() async {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _priceFilterFlag = 'unknown';
  String _minPriceVariable = 'unknown';
  final OptimizelyPlugin optimizelyPlugin = OptimizelyPlugin();

  @override
  void initState() {
    super.initState();
    setupOptimizelyAsync();
  }

  void setupOptimizely() async {
    // Uses the Optimizely example:
    // https://docs.developers.optimizely.com/full-stack/docs/example-datafile
    final dataFile =
        await DefaultAssetBundle.of(context).loadString('assets/datafile.json');
    await optimizelyPlugin.initOptimizelyManager(
      'your_optimizely_sdk_key',
      dataFile,
    );
  }

  void setupOptimizelyAsync() async {
    await optimizelyPlugin.initOptimizelyManagerAsync(
      'your_optimizely_sdk_key',
    );
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> getPriceFilterFlag() async {
    String priceFilterFlag;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      bool? featureEnabled = await optimizelyPlugin.isFeatureEnabled(
        'price_filter',
      );
      priceFilterFlag = 'price_filter feature is $featureEnabled.';
    } on PlatformException catch (e) {
      priceFilterFlag = "Failed to get feature: '${e.message}'.";
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _priceFilterFlag = priceFilterFlag;
    });
  }

  Future<void> getPriceFilterMinPrice() async {
    String minPriceVariable;
    Map<String, dynamic> variables;
    try {
      variables = await optimizelyPlugin.getAllFeatureVariables(
        'price_filter',
      );
      int? minPrice = variables['min_price'];
      minPriceVariable = "min_price variable is: ${minPrice.toString()}.";
    } catch (e) {
      minPriceVariable = "Failed to get min_price variable from feature: '$e'.";
    }

    if (!mounted) return;

    setState(() {
      _minPriceVariable = minPriceVariable;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Optimizely Example App'),
        ),
        body: SafeArea(
          child: Column(
            children: [
              SizedBox(height: 32),
              Center(
                child: Text(_priceFilterFlag),
              ),
              ElevatedButton(
                child: Text('Get Price Filter Flag'),
                onPressed: () {
                  getPriceFilterFlag();
                },
              ),
              SizedBox(height: 16),
              Center(
                child: Text(_minPriceVariable),
              ),
              ElevatedButton(
                child: Text('Get Price Filter Min Price'),
                onPressed: () {
                  getPriceFilterMinPrice();
                },
              )
            ],
          ),
        ),
      ),
    );
  }
}