Flutter UI #68: Fun with Any Link Preview in Flutter


Fun with Any Link Preview in Flutter
Flutter UI #68: Fun with Any Link Preview in Flutter


any_link_preview: ^2.0.6

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

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

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

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final String _errorImage =
      "https://i.ytimg.com/vi/z8wrRRR7_qU/maxresdefault.jpg";
  final String _url1 =
      "https://www.nilenpatelinc.com/post/here-is-when-you-can-download-ios-15-and-ipados-15-in-different-timezones-of-world";
  final String _url2 =
      "https://www.nilenpatelinc.com/post/how-to-delete-your-instagram-account-permanently";
  final String _url3 =
      "https://twitter.com/NilenPatelInc/status/1458498299837644804?s=20&t=TkSsvbaXVQRbuWxdJol7xg";
  final String _url4 = "https://www.youtube.com/watch?v=y_WqWTK8rNM";

  @override
  void initState() {
    super.initState();
    _getMetadata(_url4);
  }

  void _getMetadata(String url) async {
    bool _isValid = _getUrlValid(url);
    if (_isValid) {
      Metadata? _metadata = await AnyLinkPreview.getMetadata(
        link: url,
        cache: const Duration(days: 7),
        proxyUrl: "https://cors-anywhere.herokuapp.com/", // Needed for web app
      );
      debugPrint(_metadata?.title);
      debugPrint(_metadata?.desc);
    } else {
      debugPrint("URL is not valid");
    }
  }

  bool _getUrlValid(String url) {
    bool _isUrlValid = AnyLinkPreview.isValidLink(
      url,
      protocols: ['http', 'https'],
      hostWhitelist: ['https://youtube.com/'],
      hostBlacklist: ['https://facebook.com/'],
    );
    return _isUrlValid;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(title: const Center(child: Text('Any Link Preview'),)),
        body: SingleChildScrollView(
          padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 20),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              AnyLinkPreview(
                link: _url1,
                displayDirection: uiDirection.uiDirectionHorizontal,
                cache: const Duration(hours: 1),
                backgroundColor: Colors.grey[300],
                errorWidget: Container(
                  color: Colors.grey[300],
                  child: const Text('Oops!'),
                ),
                errorImage: _errorImage,
              ),
              const SizedBox(height: 25),
              AnyLinkPreview(
                link: _url2,
                displayDirection: uiDirection.uiDirectionHorizontal,
                showMultimedia: false,
                bodyMaxLines: 5,
                bodyTextOverflow: TextOverflow.ellipsis,
                titleStyle: const TextStyle(
                  color: Colors.black,
                  fontWeight: FontWeight.bold,
                  fontSize: 15,
                ),
                bodyStyle: const TextStyle(color: Colors.grey, fontSize: 12),
              ),
              const SizedBox(height: 25),
              AnyLinkPreview(
                displayDirection: uiDirection.uiDirectionHorizontal,
                link: _url3,
                errorBody: 'Show my custom error body',
                errorTitle: 'Next one is youtube link, error title',
              ),
              const SizedBox(height: 25),
              AnyLinkPreview(link: _url4),
            ],
          ),
        ),
      ),
    );
  }
}


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