From 88af8071c29bf9032ac4f517248516b0e2597caf Mon Sep 17 00:00:00 2001
From: UnicodingUnicorn <7555ic@gmail.com>
Date: Fri, 8 Mar 2019 00:41:00 +0800
Subject: [PATCH] LoginManager. Sudharshan please don't judge.

---
 lib/src/resources/login_api_provider.dart |  6 +++
 lib/src/services/login_manager.dart       | 46 +++++++++++++++++++++++
 pubspec.yaml                              |  5 ++-
 3 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/lib/src/resources/login_api_provider.dart b/lib/src/resources/login_api_provider.dart
index e3cf0c1..dd0ab29 100644
--- a/lib/src/resources/login_api_provider.dart
+++ b/lib/src/resources/login_api_provider.dart
@@ -11,6 +11,9 @@ class LoginApiProvider {
     final response = await http.post("$baseUrlLogin/init",
         headers: {"Content-Type": "application/json"},
         body: jsonEncode({"phone_number": user.phoneNumber}));
+    if (response.statusCode == 400 || response.statusCode == 500) {
+      throw response.statusCode;
+    }
     return response.body;
   }
 
@@ -18,6 +21,9 @@ class LoginApiProvider {
     final response = await http.post("$baseUrlLogin/verify",
         headers: {"Content-Type": "application/json"},
         body: jsonEncode({"code": otp, "nonce": nonce, "clientid": clientid}));
+    if (response.statusCode == 400 || response.statusCode == 404 || response.statusCode == 500) {
+      throw response.statusCode;
+    }
     return response.body;
   }
 
diff --git a/lib/src/services/login_manager.dart b/lib/src/services/login_manager.dart
index e69de29..40964bf 100644
--- a/lib/src/services/login_manager.dart
+++ b/lib/src/services/login_manager.dart
@@ -0,0 +1,46 @@
+import "../resources/login_api_provider.dart";
+import "../models/user_model.dart";
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+class LoginManager {
+  final loginApiProvider = LoginApiProvider();
+  User user;
+  String clientid;
+  String nonce;
+
+  LoginManager(User user, String clientid) {
+    this.user = user;
+    this.clientid = clientid;
+    this.nonce = "";
+  }
+
+  // Returns JWT, blank string if nothing is found
+  Future<String> getToken() async {
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    final token = prefs.getString("token") ?? "";
+    return token;
+  }
+
+  // Throws error status code if it occurs
+  Future<void> initAuthentication(User user) async {
+    try {
+      final nonce = await loginApiProvider.initAuthentication(user);
+      this.nonce = nonce;
+    } catch(e) {
+      throw e;
+    }
+  }
+
+  // Throws error status code if it occurs, otherwise returns jwt
+  Future<String> processOTP(String otp) async {
+    try {
+      final jwt = await loginApiProvider.verifyOtp(otp, this.nonce, this.clientid);
+      SharedPreferences prefs = await SharedPreferences.getInstance();
+      await prefs.setString("token", jwt);
+      return jwt;
+    } catch(e) {
+      throw e;
+    }
+  }
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index 8bb19d1..8e244c5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: frontend_flutter
-description: The new way to communicate with your friends and family by merging the efficiency of voice calls with the convenience of messaging. 
+description: The new way to communicate with your friends and family by merging the efficiency of voice calls with the convenience of messaging.
 version: 1.0.0+1
 
 environment:
@@ -15,6 +15,7 @@ dependencies:
   flutter_webrtc: ^0.1.0
   pin_code_text_field: ^1.1.3
   flutter_svg: ^0.10.3
+  shared_preferences: ^0.5.1
 
 dev_dependencies:
   flutter_test:
@@ -30,7 +31,7 @@ flutter_icons:
 
 flutter:
   uses-material-design: true
-  
+
   assets:
     - assets/logo.png
     - assets/phoneno.svg