clean up

lib/pages/faq/model/faq_model.dart

@@ -0,0 +1,56 @@
+import 'dart:async';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:fcs/data/services/services.dart';
+import 'package:fcs/domain/entities/faq.dart';
+import 'package:fcs/pages/main/model/base_model.dart';
+import 'package:logging/logging.dart';
+
+class FAQModel extends BaseModel {
+  final log = Logger('FAQModel');
+
+  List<FAQ> faqs = [];
+
+  FAQ getFAQ(String id) {
+    return faqs.firstWhere((e) => e.id == id, orElse: () => null);
+  }
+
+  StreamSubscription<QuerySnapshot> listener;
+
+  FAQModel() {
+    if (listener != null) listener.cancel();
+    try {
+      listener = Firestore.instance
+          .collection("/faqs")
+          .orderBy("sn", descending: false)
+          .snapshots()
+          .listen((snaps) {
+        faqs.clear();
+        snaps.documents.forEach((d) {
+          faqs.add(FAQ.fromMap(d.data, d.documentID));
+        });
+        notifyListeners();
+      });
+    } catch (e) {
+      log.warning("error:$e");
+    }
+  }
+
+  Future<void> addFAQ(FAQ faq) async {
+    await request("/faqs", "POST",
+        payload: faq.toMap(),
+        token: await Services.instance.authService.getToken());
+  }
+
+  Future<void> updateFAQ(FAQ faq) async {
+    await request("/faqs", "PUT",
+        payload: faq.toMap(),
+        token: await Services.instance.authService.getToken());
+  }
+
+  Future<void> deleteFAQ(FAQ faq) async {
+    await request("/faqs", "DELETE",
+        payload: faq.toMap(),
+        token: await Services.instance.authService.getToken());
+  }
+}