runable

lib/core/network/api_response.dart

@@ -0,0 +1,104 @@
+/// Generic API Response wrapper
+///
+/// Wraps all API responses in a consistent format with success status,
+/// data payload, optional message, and optional pagination metadata.
+class ApiResponse<T> {
+  final bool success;
+  final T data;
+  final String? message;
+  final PaginationMeta? meta;
+
+  const ApiResponse({
+    required this.success,
+    required this.data,
+    this.message,
+    this.meta,
+  });
+
+  /// Create from JSON with a data parser function
+  factory ApiResponse.fromJson(
+    Map<String, dynamic> json,
+    T Function(dynamic) dataParser,
+  ) {
+    return ApiResponse(
+      success: json['success'] as bool? ?? false,
+      data: dataParser(json['data']),
+      message: json['message'] as String?,
+      meta: json['meta'] != null
+          ? PaginationMeta.fromJson(json['meta'] as Map<String, dynamic>)
+          : null,
+    );
+  }
+
+  /// Convert to JSON
+  Map<String, dynamic> toJson(dynamic Function(T) dataSerializer) {
+    return {
+      'success': success,
+      'data': dataSerializer(data),
+      if (message != null) 'message': message,
+      if (meta != null) 'meta': meta!.toJson(),
+    };
+  }
+}
+
+/// Pagination metadata
+class PaginationMeta {
+  final int page;
+  final int limit;
+  final int total;
+  final int totalPages;
+  final bool hasPreviousPage;
+  final bool hasNextPage;
+
+  const PaginationMeta({
+    required this.page,
+    required this.limit,
+    required this.total,
+    required this.totalPages,
+    required this.hasPreviousPage,
+    required this.hasNextPage,
+  });
+
+  /// Create from JSON
+  factory PaginationMeta.fromJson(Map<String, dynamic> json) {
+    return PaginationMeta(
+      page: json['page'] as int,
+      limit: json['limit'] as int,
+      total: json['total'] as int,
+      totalPages: json['totalPages'] as int,
+      hasPreviousPage: json['hasPreviousPage'] as bool,
+      hasNextPage: json['hasNextPage'] as bool,
+    );
+  }
+
+  /// Convert to JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'page': page,
+      'limit': limit,
+      'total': total,
+      'totalPages': totalPages,
+      'hasPreviousPage': hasPreviousPage,
+      'hasNextPage': hasNextPage,
+    };
+  }
+
+  /// Create a copy with updated fields
+  PaginationMeta copyWith({
+    int? page,
+    int? limit,
+    int? total,
+    int? totalPages,
+    bool? hasPreviousPage,
+    bool? hasNextPage,
+  }) {
+    return PaginationMeta(
+      page: page ?? this.page,
+      limit: limit ?? this.limit,
+      total: total ?? this.total,
+      totalPages: totalPages ?? this.totalPages,
+      hasPreviousPage: hasPreviousPage ?? this.hasPreviousPage,
+      hasNextPage: hasNextPage ?? this.hasNextPage,
+    );
+  }
+}