Added liked tenders desigm and data from api

2025-09-02 16:56:42 +03:30
parent e1b4c1dae7
commit 79874c40b1
32 changed files with 2028 additions and 23 deletions
@@ -0,0 +1,107 @@
+import 'package:flutter/material.dart';
+import 'package:tm_app/core/utils/result.dart';
+import 'package:tm_app/data/repositories/liked_tenders_repository.dart';
+import 'package:tm_app/data/services/model/liked_tender_feedback/liked_tender_feedback.dart';
+import 'package:tm_app/data/services/model/liked_tenders_response/liked_tenders_response.dart';
+
+class LikedTendersViewModel with ChangeNotifier {
+  final LikedTendersRepository likedTendersRepository;
+  LikedTendersViewModel({required this.likedTendersRepository}) {
+    getLikedTenders(reset: true);
+  }
+
+  bool isLoading = false;
+  bool isLoadingMore = false;
+  bool hasMore = true;
+  String? errorMessage;
+  LikedTendersResponse? data;
+
+  int _offset = 0;
+  final int _limit = 20;
+
+  Future<void> getLikedTenders({bool reset = false}) async {
+    if (!reset && (isLoadingMore || !hasMore)) {
+      return;
+    }
+
+    if (reset) {
+      _offset = 0;
+      hasMore = true;
+    }
+
+    if (_offset == 0) {
+      isLoading = true;
+    } else {
+      isLoadingMore = true;
+    }
+    errorMessage = null;
+    notifyListeners();
+
+    final result = await likedTendersRepository.getLikedTenders(
+      offset: _offset,
+      limit: _limit,
+    );
+
+    switch (result) {
+      case Ok<LikedTendersResponse>():
+        final incoming = result.value;
+        final incomingList = incoming.data?.feedback ?? [];
+
+        if (reset || data == null) {
+          data = incoming;
+        } else {
+          final existingList = data!.data!.feedback ?? [];
+          final combined = List<LikedTenderFeedback>.of(existingList)
+            ..addAll(incomingList);
+
+          final newMeta = incoming.data?.meta ?? data!.data!.meta;
+
+          data = data!.copyWith(
+            data: data!.data!.copyWith(feedback: combined, meta: newMeta),
+          );
+        }
+
+        // چون offset بر اساس limit حرکت می‌کنه
+        hasMore = incomingList.length == _limit;
+        _offset += _limit;
+
+        errorMessage = null;
+        break;
+
+      case Error<LikedTendersResponse>():
+        errorMessage = result.error.toString();
+        break;
+    }
+
+    isLoading = false;
+    isLoadingMore = false;
+    notifyListeners();
+  }
+
+  Future<void> loadMoreIfNeeded() async {
+    if (isLoadingMore || !hasMore) {
+      return;
+    }
+    await getLikedTenders(reset: false);
+  }
+
+  void removeTenderById(String id) {
+    final current = data;
+    final list = current?.data?.feedback;
+    if (current == null || list == null) {
+      return;
+    }
+
+    final List<LikedTenderFeedback> updatedList = List<LikedTenderFeedback>.of(
+      list,
+    )..removeWhere((e) => e.id == id);
+
+    final updatedMeta = current.data?.meta?.copyWith(total: updatedList.length);
+
+    data = current.copyWith(
+      data: current.data?.copyWith(feedback: updatedList, meta: updatedMeta),
+    );
+
+    notifyListeners();
+  }
+}