simple_aws_translate 0.0.7

A simple implementation of the AWS Translation plugin for testing purposes only. NOT for production use as it requires embedding AWS credentials. Developed by Afandi Yusuf.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:simple_aws_translate/simple_aws_translate.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final TextEditingController textController = TextEditingController();
  String resultText = "";
  String sourceLanguage = "auto";
  String targetLanguage = "en";
  bool isTranslating = false;
  String? errorMessage;
  
  // Available language codes
  final List<Map<String, String>> languages = [
    {"code": "auto", "name": "Auto-detect"},
    {"code": "en", "name": "English"},
    {"code": "es", "name": "Spanish"},
    {"code": "fr", "name": "French"},
    {"code": "de", "name": "German"},
    {"code": "it", "name": "Italian"},
    {"code": "pt", "name": "Portuguese"},
    {"code": "ja", "name": "Japanese"},
    {"code": "ko", "name": "Korean"},
    {"code": "zh", "name": "Chinese"},
    {"code": "ru", "name": "Russian"},
    {"code": "ar", "name": "Arabic"},
    {"code": "id", "name": "Indonesian"},
  ];

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

  // Initialize the AWS Translate service
  Future<void> initTranslateService() async {
    // IMPORTANT: Replace these with your actual AWS credentials
    // For production, use secure storage or environment variables
    SimpleAwsTranslate.instance.init(
      accessKey: "your_access_key_here",
      secretKey: "your_secret_key_here",
      region: AwsRegion.apSoutheast1, // Default Singapore region
    );
  }

  // Translate the input text
  Future<void> translateText() async {
    final text = textController.text;
    if (text.isEmpty) {
      setState(() {
        errorMessage = "Please enter text to translate";
      });
      return;
    }

    setState(() {
      isTranslating = true;
      resultText = "Translating...";
      errorMessage = null;
    });

    try {
      final result = await SimpleAwsTranslate.instance.translateText(
        text,
        from: sourceLanguage,
        to: targetLanguage,
      );
      
      setState(() {
        resultText = result;
        isTranslating = false;
      });
    } on AwsTranslationException catch (e) {
      setState(() {
        resultText = "";
        errorMessage = "Translation error: ${e.message}";
        isTranslating = false;
      });
    } catch (e) {
      setState(() {
        resultText = "";
        errorMessage = "Unexpected error: $e";
        isTranslating = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        useMaterial3: true,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('AWS Translate Example'),
          elevation: 2,
        ),
        // Warning banner for testing only
        bottomNavigationBar: Container(
          color: Colors.red.shade700,
          padding: const EdgeInsets.symmetric(vertical: 10, horizontal: 16),
          child: const Text(
            '⚠️ FOR TESTING PURPOSES ONLY - DO NOT USE IN PRODUCTION ⚠️',
            style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
            textAlign: TextAlign.center,
          ),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // Source language dropdown
              Row(
                children: [
                  const Text('From: ', style: TextStyle(fontWeight: FontWeight.bold)),
                  const SizedBox(width: 8),
                  Expanded(
                    child: DropdownButton<String>(
                      isExpanded: true,
                      value: sourceLanguage,
                      onChanged: (value) {
                        setState(() {
                          sourceLanguage = value!;
                        });
                      },
                      items: languages.map((lang) => DropdownMenuItem<String>(
                        value: lang["code"],
                        child: Text(lang["name"]!),
                      )).toList(),
                    ),
                  ),
                ],
              ),
              
              // Target language dropdown
              Row(
                children: [
                  const Text('To: ', style: TextStyle(fontWeight: FontWeight.bold)),
                  const SizedBox(width: 8),
                  Expanded(
                    child: DropdownButton<String>(
                      isExpanded: true,
                      value: targetLanguage,
                      onChanged: (value) {
                        setState(() {
                          targetLanguage = value!;
                        });
                      },
                      items: languages.where((lang) => lang["code"] != "auto").map((lang) => DropdownMenuItem<String>(
                        value: lang["code"],
                        child: Text(lang["name"]!),
                      )).toList(),
                    ),
                  ),
                ],
              ),
              
              const SizedBox(height: 16),
              
              // Input text field
              TextField(
                controller: textController,
                decoration: const InputDecoration(
                  labelText: "Enter text to translate",
                  border: OutlineInputBorder(),
                ),
                maxLines: 4,
              ),
              
              const SizedBox(height: 16),
              
              // Translate button
              ElevatedButton(
                onPressed: isTranslating ? null : translateText,
                child: Padding(
                  padding: const EdgeInsets.all(12.0),
                  child: Text(
                    isTranslating ? "Translating..." : "Translate",
                    style: const TextStyle(fontSize: 16),
                  ),
                ),
              ),
              
              const SizedBox(height: 24),
              
              // Error message
              if (errorMessage != null)
                Container(
                  padding: const EdgeInsets.all(8),
                  decoration: BoxDecoration(
                    color: Colors.red.shade100,
                    borderRadius: BorderRadius.circular(4),
                  ),
                  child: Text(
                    errorMessage!,
                    style: TextStyle(color: Colors.red.shade900),
                  ),
                ),
              
              // Result section
              if (resultText.isNotEmpty && errorMessage == null) ...[  
                const SizedBox(height: 16),
                const Text(
                  "Translation Result:",
                  style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
                ),
                const SizedBox(height: 8),
                Container(
                  padding: const EdgeInsets.all(12),
                  decoration: BoxDecoration(
                    color: Colors.grey.shade100,
                    borderRadius: BorderRadius.circular(4),
                    border: Border.all(color: Colors.grey.shade300),
                  ),
                  child: Text(
                    resultText,
                    style: const TextStyle(fontSize: 16),
                  ),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }
}