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lib/services/quote_api_v2.dart

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+import "dart:convert";
+import "dart:typed_data";
+import "package:http/http.dart" as http;
+
+
+
+class QuoteEngagement {
+  final int? likes;
+  final int? retweets;
+  final int? replies;
+  final int? views;
+
+  QuoteEngagement({
+    this.likes,
+    this.retweets,
+    this.replies,
+    this.views,
+  });
+
+  Map<String, dynamic> toJson() {
+    return {
+      if (likes != null) "likes": likes,
+      if (retweets != null) "retweets": retweets,
+      if (replies != null) "replies": replies,
+      if (views != null) "views": views,
+    };
+  }
+
+  factory QuoteEngagement.fromJson(Map<String, dynamic> json) {
+    return QuoteEngagement(
+      likes: json["likes"],
+      retweets: json["retweets"],
+      replies: json["replies"],
+      views: json["views"],
+    );
+  }
+}
+
+
+class QuoteSessionRequest {
+  final String? displayName;
+  final String? username;
+  final dynamic avatarUrl;
+  final String? text;
+  final dynamic imageUrl;
+  final int? timestamp;
+  final bool? verified;
+  final QuoteEngagement? engagement;
+  final bool clearAvatarUrl;
+  final bool clearImageUrl;
+  final bool clearEngagement;
+
+  QuoteSessionRequest({
+    this.displayName,
+    this.username,
+    this.avatarUrl,
+    this.text,
+    this.imageUrl,
+    this.timestamp,
+    this.verified,
+    this.engagement,
+    this.clearAvatarUrl = false,
+    this.clearImageUrl = false,
+    this.clearEngagement = false,
+  });
+
+
+  // convert img bytes to base64 data uri
+  String? _encodeImage(dynamic image) {
+    if (image == null) return null;
+    if (image is String) return image;
+    if (image is Uint8List) {
+      final base64String = base64Encode(image);
+      return "data:image/png;base64,$base64String";
+    }
+    return null;
+  }
+
+  Map<String, dynamic> toJson() {
+    final map = <String, dynamic>{};
+
+    if (displayName != null) map["displayName"] = displayName;
+    if (username != null) map["username"] = username;
+
+    if (clearAvatarUrl) {
+      map["avatarUrl"] = null;
+    } else {
+      final encodedAvatar = _encodeImage(avatarUrl);
+      if (encodedAvatar != null) map["avatarUrl"] = encodedAvatar;
+    }
+
+    if (text != null) map["text"] = text;
+
+    if (clearImageUrl) {
+      map["imageUrl"] = null;
+    } else {
+      final encodedImage = _encodeImage(imageUrl);
+      if (encodedImage != null) map["imageUrl"] = encodedImage;
+    }
+
+    if (timestamp != null) map["timestamp"] = timestamp;
+
+    if (verified != null) map["verified"] = verified;
+
+    if (clearEngagement) {
+      map["engagement"] = null;
+    } else if (engagement != null) {
+      map["engagement"] = engagement!.toJson();
+    }
+
+    return map;
+  }
+}
+
+class QuoteSession {
+  final String id;
+  final String? displayName;
+  final String? username;
+  final String? avatarUrl;
+  final String? text;
+  final String? imageUrl;
+  final int? timestamp;
+  final bool? verified;
+  final QuoteEngagement? engagement;
+  final int createdAt;
+  final int updatedAt;
+
+  QuoteSession({
+    required this.id,
+    this.displayName,
+    this.username,
+    this.avatarUrl,
+    this.text,
+    this.imageUrl,
+    this.timestamp,
+    this.verified,
+    this.engagement,
+    required this.createdAt,
+    required this.updatedAt,
+  });
+
+  factory QuoteSession.fromJson(Map<String, dynamic> json) {
+    return QuoteSession(
+      id: json["id"],
+      displayName: json["displayName"],
+      username: json["username"],
+      avatarUrl: json["avatarUrl"],
+      text: json["text"],
+      imageUrl: json["imageUrl"],
+      timestamp: json["timestamp"],
+      verified: json["verified"],
+      engagement: json["engagement"] != null
+          ? QuoteEngagement.fromJson(json["engagement"])
+          : null,
+      createdAt: json["createdAt"],
+      updatedAt: json["updatedAt"],
+    );
+  }
+}
+
+
+class QuoteGeneratorApiV2 {
+  static const String _baseUrl = "https://quotes.imbenji.net";
+  // static const String _baseUrl = "http://localhost:3000";
+
+
+  // create new session
+  static Future<QuoteSession> createSession(QuoteSessionRequest request) async {
+    final url = Uri.parse("$_baseUrl/v2/quote");
+
+    final response = await http.post(
+      url,
+      headers: {"Content-Type": "application/json"},
+      body: jsonEncode(request.toJson()),
+    );
+
+    if (response.statusCode == 201) {
+      final data = jsonDecode(response.body);
+      return QuoteSession.fromJson(data);
+    } else {
+      throw Exception("Failed to create sesion: ${response.statusCode}");
+    }
+  }
+
+
+  // get session state
+  static Future<QuoteSession> getSession(String sessionId) async {
+    final url = Uri.parse("$_baseUrl/v2/quote/$sessionId");
+
+    final response = await http.get(url);
+
+    if (response.statusCode == 200) {
+      final data = jsonDecode(response.body);
+      return QuoteSession.fromJson(data);
+    } else {
+      throw Exception("Failed to get session: ${response.statusCode}");
+    }
+  }
+
+  // update session fields (only send whats changed)
+  static Future<QuoteSession> updateSession(
+    String sessionId,
+    QuoteSessionRequest updates,
+  ) async {
+    final url = Uri.parse("$_baseUrl/v2/quote/$sessionId");
+
+    final response = await http.patch(
+      url,
+      headers: {"Content-Type": "application/json"},
+      body: jsonEncode(updates.toJson()),
+    );
+
+    if (response.statusCode == 200) {
+      final data = jsonDecode(response.body);
+      return QuoteSession.fromJson(data);
+    } else {
+      throw Exception("Failed to updte session: ${response.statusCode}");
+    }
+  }
+
+  // render the session as image
+  static Future<Uint8List> generateImage(String sessionId) async {
+    final url = Uri.parse("$_baseUrl/v2/quote/$sessionId/image");
+
+    final response = await http.get(url);
+
+    if (response.statusCode == 200) {
+      return response.bodyBytes;
+    } else {
+      throw Exception("Failed to genrate image: ${response.statusCode}");
+    }
+  }
+
+
+  // delete session
+  static Future<void> deleteSession(String sessionId) async {
+    final url = Uri.parse("$_baseUrl/v2/quote/$sessionId");
+
+    final response = await http.delete(url);
+
+    if (response.statusCode != 204) {
+      throw Exception("Failed to delte session: ${response.statusCode}");
+    }
+  }
+
+
+  // helper to get curren timestamp in seconds
+  static int getCurrentTimestamp() {
+    return DateTime.now().millisecondsSinceEpoch ~/ 1000;
+  }
+}