Improvement of the model (addition of the class artist and modification of the class music) 🎨 and realization of the class MusicViewModel with test ✅

Sources/justMUSIC/lib/model/Artist.dart

@@ -0,0 +1,10 @@
+class Artist {
+  String _id;
+  String _name;
+
+  Artist(this._id, this._name);
+
+  String get id => _id;
+
+  String get name => _name;
+}

Sources/justMUSIC/lib/model/Music.dart

@@ -1,15 +1,19 @@
+import 'Artist.dart';
+
 class Music {
-  final int _id;
+  final String _id;
   String _title;
   String _cover;
-  String _singer;
+  String _previewUrl;
   DateTime _date;
+  List<Artist> _artists;
 
   // Constructor
-  Music(this._id, this._title, this._cover, this._singer, this._date);
+  Music(this._id, this._title, this._cover, this._previewUrl, this._date,
+      this._artists);
 
   //Getters and setters
-  int get id => _id;
+  String get id => _id;
 
   String get title => _title;
 
@@ -19,19 +23,25 @@ class Music {
 
   String get cover => _cover;
 
+  set cover(String value) {
+    _cover = value;
+  }
+
+  String get previewUrl => _previewUrl;
+
+  set previewUrl(String value) {
+    _previewUrl = value;
+  }
+
   DateTime get date => _date;
 
   set date(DateTime value) {
     _date = value;
   }
 
-  String get singer => _singer;
-
-  set singer(String value) {
-    _singer = value;
-  }
+  List<Artist> get artists => _artists;
 
-  set cover(String value) {
-    _cover = value;
+  set artists(List<Artist> value) {
+    _artists = value;
   }
 }

Sources/justMUSIC/lib/model/Post.dart

@@ -2,7 +2,7 @@ class Post {
   final int _id;
   final int _idUser;
   String? _description;
-  int _idMusic;
+  String _idMusic;
   String _location;
   int _nblikes;
   String? _selfie;
@@ -23,9 +23,9 @@ class Post {
     _description = value;
   }
 
-  int get idMusic => _idMusic;
+  String get idMusic => _idMusic;
 
-  set idMusic(int value) {
+  set idMusic(String value) {
     _idMusic = value;
   }
 

Sources/justMUSIC/lib/view_model/CommentViewModel.dart

@@ -1,10 +1,8 @@
 import '../model/Comment.dart';
 
 class CommentViewModel {
-
   // Methods
   List<Comment> getCommentsPost(int idPost) {
     throw new Error();
   }
-
 }

Sources/justMUSIC/lib/view_model/MusicViewModel.dart

@@ -1,19 +1,96 @@
+import 'dart:convert';
+
+import 'package:justmusic/view_model/TokenSpotify.dart';
+import 'package:http/http.dart' as http;
+import '../model/Artist.dart';
 import '../model/Music.dart';
 
 class MusicViewModel {
+  final String API_URL = "https://api.spotify.com/v1";
+  late TokenSpotify _token;
 
-  final String API_URL = "";
+  MusicViewModel() {
+    _token = new TokenSpotify();
+  }
 
   // Methods
-  Music getMusic(int id) {
-    throw new Error();
+  Future<Music> getMusic(String id) async {
+    var accessToken = await _token.getAccessToken();
+    var response = await http.get(Uri.parse('$API_URL/tracks/$id'), headers: {
+      'Authorization': 'Bearer $accessToken',
+    });
+
+    if (response.statusCode == 200) {
+      final responseData = jsonDecode(response.body);
+      List<Artist> artists =
+          List<Artist>.from(responseData['artists'].map((artist) {
+        return Artist(artist['id'], artist['name']);
+      }));
+
+      return Music(
+          responseData['id'],
+          responseData['name'],
+          responseData['album']['images'][0]['url'],
+          responseData['preview_url'],
+          DateTime.parse(responseData['album']['release_date']),
+          artists);
+    } else {
+      throw Exception(
+          'Error retrieving music information : ${response.statusCode} ${response.reasonPhrase}');
+    }
   }
 
-  Music getMusicWithName(String name) {
-    throw new Error();
+  List<Music> _getMusicsFromResponse(Map<String, dynamic> responseData) {
+    List<Music> musics = [];
+
+    List<dynamic> tracks = responseData['tracks']['items'];
+    for (var track in tracks) {
+      List<Artist> artists = List<Artist>.from(track['artists'].map((artist) {
+        return Artist(artist['id'], artist['name']);
+      }));
+
+      musics.add(Music(
+          track['id'],
+          track['name'],
+          track['album']['images'][0]['url'],
+          track['preview_url'],
+          DateTime.now(),
+          artists));
+    }
+
+    return musics;
   }
 
-  List<Music> getMusics(String name) {
-    throw new Error();
+  Future<List<Music>> getMusicsWithName(String name, {int limit = 20, int offset = 1}) async {
+    var accessToken = await _token.getAccessToken();
+    var response = await http
+        .get(Uri.parse('$API_URL/search?q=track%3A$name&type=track&limit=$limit&offset=$offset'), headers: {
+      'Authorization': 'Bearer $accessToken',
+    });
+
+    if (response.statusCode == 200) {
+      Map<String, dynamic> responseData = jsonDecode(response.body);
+      return _getMusicsFromResponse(responseData);
+    } else {
+      throw Exception(
+          'Error while retrieving music : ${response.statusCode} ${response.reasonPhrase}');
+    }
+  }
+
+  Future<List<Music>> getMusicsWithArtistName(String name, {int limit = 20, int offset = 1}) async {
+    var accessToken = await _token.getAccessToken();
+    var response = await http.get(
+        Uri.parse('$API_URL/search?q=artist%3A$name&type=track&limit=$limit&offset=$offset'),
+        headers: {
+          'Authorization': 'Bearer $accessToken',
+        });
+
+    if (response.statusCode == 200) {
+      Map<String, dynamic> responseData = jsonDecode(response.body);
+      return _getMusicsFromResponse(responseData);
+    } else {
+      throw Exception(
+          'Error while retrieving music : ${response.statusCode} ${response.reasonPhrase}');
+    }
   }
 }

Sources/justMUSIC/lib/view_model/TokenSpotify.dart

@@ -32,9 +32,10 @@ class TokenSpotify {
     if (response.statusCode == 200) {
       final responseData = jsonDecode(response.body);
       _accessToken = responseData['access_token'];
-      _tokenEnd = DateTime.now().add(Duration(seconds: responseData['expires_in']));
+      _tokenEnd =
+          DateTime.now().add(Duration(seconds: responseData['expires_in']));
     } else {
-      print('Erreur lors de l\'actualisation du token : ${response.statusCode}');
+      print('Error refreshing token : ${response.statusCode}');
     }
   }
 

Sources/justMUSIC/test/Music_test.dart

@@ -0,0 +1,35 @@
+import 'package:justmusic/model/Artist.dart';
+import 'package:justmusic/model/Music.dart';
+import 'package:justmusic/view_model/MusicViewModel.dart';
+
+Future<void> main() async {
+  MusicViewModel musicVM = new MusicViewModel();
+  Music m = await musicVM.getMusic('295SxdR1DqunCNwd0U767w');
+  print("id :" + m.id.toString() + " cover :" + m.cover + " title :" + m.title);
+  print(m.date.toString() + " " + m.previewUrl);
+  for (Artist a in m.artists) {
+    print(a.id + ":" + a.name);
+  }
+
+  print('\nMusics :');
+
+  List<Music> musics = await musicVM.getMusicsWithName('Onizuka');
+  for (Music m in musics) {
+    print("id :" + m.id.toString() + " cover :" + m.cover + " title :" + m.title);
+    print(m.date.toString() + " " + m.previewUrl);
+    for (Artist a in m.artists) {
+      print(a.id + ":" + a.name);
+    }
+  }
+
+  print('\nMusics With Artist:');
+
+  List<Music> musics2 = await musicVM.getMusicsWithArtistName('PNL');
+  for (Music m in musics2) {
+    print("id :" + m.id.toString() + " cover :" + m.cover + " title :" + m.title);
+    print(m.date.toString() + " " + m.previewUrl);
+    for (Artist a in m.artists) {
+      print(a.id + ":" + a.name);
+    }
+  }
+}