add payment

lib/pages/invoice/model/invoice_model.dart

@@ -1,18 +1,16 @@
 import 'dart:async';
-import 'dart:convert';
 import 'dart:io';
 
 import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:fcs/config.dart';
 import 'package:fcs/data/services/services.dart';
 import 'package:fcs/domain/constants.dart';
 import 'package:fcs/domain/entities/invoice.dart';
-import 'package:fcs/helpers/api_helper.dart';
+import 'package:fcs/domain/entities/payment.dart';
 import 'package:fcs/helpers/firebase_helper.dart';
 import 'package:fcs/helpers/paginator.dart';
 import 'package:fcs/pages/main/model/base_model.dart';
 import 'package:logging/logging.dart';
-import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as Path;
 
 class InvoiceModel extends BaseModel {
   final log = Logger('InvoiceModel');
@@ -135,11 +133,33 @@ class InvoiceModel extends BaseModel {
     _invoices = [];
   }
 
+  Future<Invoice> getInvoice(String id) async {
+    String path = "/$invoices_collection";
+    try {
+      var ref = Firestore.instance.collection("$path").document(id);
+      var snap = await ref.get(source: Source.server);
+      if (snap.exists) {
+        var s = Invoice.fromMap(snap.data, snap.documentID);
+        return s;
+      }
+    } catch (e) {
+      log.warning("Error!! $e");
+    }
+    return null;
+  }
+
+  Future<void> pay(Payment payment, File file) async {
+    String path = Path.join(receipt_labels_files_path, user.id);
+    String url = await uploadStorage(path, file);
+    payment.paymentReceiptURL = url;
+    return Services.instance.invoiceService.pay(payment);
+  }
+
+  Future<void> updatePaymentStatus(Payment payment) async {
+    return Services.instance.invoiceService.updatPaymentStatus(payment);
+  }
+
   Future<void> createInvoice(Invoice invoice) async {
-    File file = await downloadPDF("invoice", invoice.toMap());
-    String url = await uploadStorage("pdfs", file);
-    print("uploaded url: $url");
-    invoice.invoiceURL = url;
     return Services.instance.invoiceService.createInvoice(invoice);
   }