add structure

lib/model/buyer_model.dart

@@ -0,0 +1,177 @@
+import 'dart:async';
+import 'dart:convert' show HtmlEscape, base64, utf8;
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:logging/logging.dart';
+import 'package:fcs/config.dart';
+import 'package:fcs/theme/theme.dart';
+import 'package:fcs/vo/buyer.dart';
+import 'package:fcs/vo/popup_menu.dart';
+
+import 'base_model.dart';
+import 'constants.dart';
+import 'firebase_helper.dart';
+
+class BuyerModel extends BaseModel {
+  final log = Logger('BuyerModel');
+
+  StreamSubscription<QuerySnapshot> listener;
+
+  List<Buyer> buyers = [];
+  PopupMenu popupMenu = new PopupMenu(index: 0);
+  PopupMenu sortMenu = new PopupMenu();
+  Buyer searchBuyer;
+  void initUser(user) {
+    super.initUser(user);
+    _loadBuyers();
+  }
+
+  Future<void> _loadBuyers() async {
+    if (!user.isOwnerAndAbove() && !user.hasBuyer()) {
+      return;
+    }
+
+    listener = getQuerySnapshotByOrder(
+            "/$biz_collection/${setting.okEnergyId}/$buyer_collection",
+            'user_name')
+        .listen((snaps) async {
+      buyers.clear();
+      snaps.documents.forEach((d) {
+        buyers.add(Buyer.fromMap(d.data, d.documentID));
+      });
+      notifyListeners();
+    });
+  }
+
+  @override
+  logout() async {
+    if (listener != null) await listener.cancel();
+    buyers = [];
+  }
+
+  Future<Buyer> getBuyer(String buyerID) async {
+    var snap = await getDocSnap(
+        "/$biz_collection/${setting.okEnergyId}/$buyer_collection", buyerID);
+    return Buyer.fromMap(snap.data, snap.documentID);
+  }
+
+  Future<Buyer> loadBuyerProducts(Buyer buyer, {bool force = false}) async {
+    if (!force && buyer.buyerProducts != null && buyer.buyerProducts.length > 0)
+      return buyer;
+    var snaps = await getSnapshot(
+        "/$biz_collection/${setting.okEnergyId}/$buyer_collection/${buyer.id}/$product_collection");
+    buyer.buyerProducts = snaps.documents
+        .map((s) => BuyerProduct.fromMap(s.data, s.documentID))
+        .toList();
+    return buyer;
+  }
+
+  Future<void> delete(Buyer buyer) async {
+    await request("/buyer/${buyer.id}", "DELETE", token: await getToken());
+  }
+
+  Future<void> approve(Buyer buyer) async {
+    await request("/buyer/approve", "PUT",
+        payload: buyer.toMap(), token: await getToken());
+  }
+
+  Future<void> reject(Buyer buyer) async {
+    await request("/buyer/reject", "POST",
+        payload: buyer.toMap(), token: await getToken());
+  }
+
+  Future<void> allocate(Buyer buyer) async {
+    await request("/buyer/allocate", "POST",
+        payload: buyer.toMap(), token: await getToken());
+  }
+
+  void filterStatus(String status, int _selectedIndex, int _sleectedSortIndex) {
+    this.sortMenu.index = _sleectedSortIndex;
+    buyers.clear();
+    if (listener != null) {
+      listener.cancel();
+    }
+
+    this.popupMenu.index = _selectedIndex;
+    String path = "/$biz_collection/${setting.okEnergyId}/$buyer_collection";
+    listener = getFilterStatusSnapshot(path, status, 'user_name')
+        .listen((snaps) async {
+      buyers.clear();
+      snaps.documents.forEach((d) {
+        buyers.add(Buyer.fromMap(d.data, d.documentID));
+      });
+      notifyListeners();
+    });
+    notifyListeners();
+  }
+
+  Future<List<Buyer>> search(String searchBuyer) async {
+    if (searchBuyer == null || searchBuyer == '') return List();
+
+    var bytes = utf8.encode(searchBuyer);
+    var base64Str = base64.encode(bytes);
+    HtmlEscape htmlEscape = const HtmlEscape();
+    String escapeBuyer = htmlEscape.convert(base64Str);
+
+    int limit = 20;
+    List<Buyer> _buyers = [];
+
+    try {
+      var data = await request(
+          "/api/fts/$buyer_collection/$escapeBuyer/$limit", "GET",
+          token: await getToken(), url: Config.instance.reportURL);
+      if (data == null) return List();
+
+      data.forEach((buyer) {
+        var _buyer = Buyer.fromJson(buyer);
+        _buyers.add(_buyer);
+      });
+    } catch (e) {
+      // permission error
+      log.warning("buyer error:" + e.toString());
+      return null;
+    }
+    return _buyers;
+  }
+
+  void filterSorting(int _sleectedSortIndex, int _selectedIndex) {
+    this.popupMenu.index = _selectedIndex;
+    buyers.clear();
+    if (listener != null) {
+      listener.cancel();
+    }
+    String _fieldName;
+    bool descending = false;
+
+    if (_sleectedSortIndex == 0) {
+      _fieldName = 'user_name';
+      descending = false;
+    }
+    if (_sleectedSortIndex == 1) {
+      _fieldName = 'user_name';
+      descending = true;
+    }
+    if (_sleectedSortIndex == 2) {
+      _fieldName = 'phone_number';
+      descending = false;
+    }
+    if (_sleectedSortIndex == 3) {
+      _fieldName = 'phone_number';
+      descending = true;
+    }
+
+    this.sortMenu.index = _sleectedSortIndex;
+    String path = "/$biz_collection/${setting.okEnergyId}/$buyer_collection";
+    listener =
+        getFilterSnapshot(path, descending, _fieldName).listen((snaps) async {
+      buyers.clear();
+      snaps.documents.forEach((d) {
+        buyers.add(Buyer.fromMap(d.data, d.documentID));
+        notifyListeners();
+      });
+
+      notifyListeners();
+    });
+    notifyListeners();
+  }
+}