Validation of email and show snacker on no user found

.env.example

@@ -1 +1 @@
-API_URL=<api_server_ip>:<api_server_port>
+API_URL=127.0.0.1:3000

android/app/build.gradle

@@ -34,7 +34,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.systranca_app"
-        minSdkVersion 16
+        minSdkVersion 18
         targetSdkVersion 28
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

ios/Flutter/Debug.xcconfig

@@ -1 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

ios/Flutter/Release.xcconfig

@@ -1 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

ios/Podfile

@@ -0,0 +1,75 @@
+# Using a CDN with CocoaPods 1.7.2 or later can save a lot of time on pod installation, but it's experimental rather than the default.
+# source 'https://cdn.cocoapods.org/'
+
+# Uncomment this line to define a global platform for your project
+# platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def parse_KV_file(file, separator='=')
+  file_abs_path = File.expand_path(file)
+  if !File.exists? file_abs_path
+    return [];
+  end
+  pods_ary = []
+  skip_line_start_symbols = ["#", "/"]
+  File.foreach(file_abs_path) { |line|
+      next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
+      plugin = line.split(pattern=separator)
+      if plugin.length == 2
+        podname = plugin[0].strip()
+        path = plugin[1].strip()
+        podpath = File.expand_path("#{path}", file_abs_path)
+        pods_ary.push({:name => podname, :path => podpath});
+      else
+        puts "Invalid plugin specification: #{line}"
+      end
+  }
+  return pods_ary
+end
+
+target 'Runner' do
+  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
+  # referring to absolute paths on developers' machines.
+  system('rm -rf .symlinks')
+  system('mkdir -p .symlinks/plugins')
+
+  # Flutter Pods
+  generated_xcode_build_settings = parse_KV_file('./Flutter/Generated.xcconfig')
+  if generated_xcode_build_settings.empty?
+    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first."
+  end
+  generated_xcode_build_settings.map { |p|
+    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'
+      symlink = File.join('.symlinks', 'flutter')
+      File.symlink(File.dirname(p[:path]), symlink)
+      pod 'Flutter', :path => File.join(symlink, File.basename(p[:path]))
+    end
+  }
+
+  # Plugin Pods
+  plugin_pods = parse_KV_file('../.flutter-plugins')
+  plugin_pods.map { |p|
+    symlink = File.join('.symlinks', 'plugins', p[:name])
+    File.symlink(p[:path], symlink)
+    pod p[:name], :path => File.join(symlink, 'ios')
+  }
+end
+
+# Prevent Cocoapods from embedding a second Flutter framework and causing an error with the new Xcode build system.
+install! 'cocoapods', :disable_input_output_paths => true
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['ENABLE_BITCODE'] = 'NO'
+    end
+  end
+end

ios/Podfile.lock

@@ -0,0 +1,22 @@
+PODS:
+  - Flutter (1.0.0)
+  - flutter_secure_storage (3.3.1):
+    - Flutter
+
+DEPENDENCIES:
+  - Flutter (from `.symlinks/flutter/ios`)
+  - flutter_secure_storage (from `.symlinks/plugins/flutter_secure_storage/ios`)
+
+EXTERNAL SOURCES:
+  Flutter:
+    :path: ".symlinks/flutter/ios"
+  flutter_secure_storage:
+    :path: ".symlinks/plugins/flutter_secure_storage/ios"
+
+SPEC CHECKSUMS:
+  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
+  flutter_secure_storage: 7953c38a04c3fdbb00571bcd87d8e3b5ceb9daec
+
+PODFILE CHECKSUM: 64b2109b760ac9073c864e2a8278e6464efaa219
+
+COCOAPODS: 1.7.2

ios/Runner.xcodeproj/project.pbxproj

@@ -19,6 +19,7 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		D9298627C8F31ECC0A34E051 /* libPods-Runner.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 9DEB561CC3AD7D6EFAD6D7F6 /* libPods-Runner.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -41,6 +42,7 @@
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
 		3B80C3931E831B6300D905FE /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/App.framework; sourceTree = "<group>"; };
+		4CBD649C9C48CF470F3415F4 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
 		7AFFD8ED1D35381100E5BB4D /* AppDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
 		7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
@@ -53,6 +55,9 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		9DEB561CC3AD7D6EFAD6D7F6 /* libPods-Runner.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-Runner.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		CDE40F79F1B9B0DAB2E3D84B /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		E01E7650441CC14E129A0EF5 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -62,12 +67,21 @@
 			files = (
 				9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */,
 				3B80C3941E831B6300D905FE /* App.framework in Frameworks */,
+				D9298627C8F31ECC0A34E051 /* libPods-Runner.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		2ADC008CAA1EC5DD99B5936B /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				9DEB561CC3AD7D6EFAD6D7F6 /* libPods-Runner.a */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -87,7 +101,8 @@
 				9740EEB11CF90186004384FC /* Flutter */,
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
-				CF3B75C9A7D2FA2A4C99F110 /* Frameworks */,
+				B877F7A4D702E9251E7914AF /* Pods */,
+				2ADC008CAA1EC5DD99B5936B /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -123,19 +138,32 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
+		B877F7A4D702E9251E7914AF /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				4CBD649C9C48CF470F3415F4 /* Pods-Runner.debug.xcconfig */,
+				E01E7650441CC14E129A0EF5 /* Pods-Runner.release.xcconfig */,
+				CDE40F79F1B9B0DAB2E3D84B /* Pods-Runner.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
 		97C146ED1CF9000F007C117D /* Runner */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				6D9D226BF3265784D6C5BE2E /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				45580E63B951922800F81140 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -208,6 +236,43 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" thin";
 		};
+		45580E63B951922800F81140 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		6D9D226BF3265784D6C5BE2E /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;

lib/main.dart

@@ -1,10 +1,22 @@
 import 'package:flutter/material.dart';
 import 'package:systranca_app/routes.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
 
 Future main() async {
   String _initialRoute = '/';
   await DotEnv().load('.env');
+  Future<String> getInitialRoute() async{
+    final storage = new FlutterSecureStorage();
+    String value = await storage.read(key: "userID");
+    if(value!=null &&value.isNotEmpty){
+      return '/home';
+    }else{
+      return '/';
+    }
+
+  }
 
   runApp(
     MaterialApp(

lib/screens/login.dart

@@ -7,6 +7,8 @@ import 'dart:convert';
 import 'package:systranca_app/helpers/validators.dart';
 import 'package:systranca_app/themes/login.dart';
 import 'package:systranca_app/helpers/user.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
 
 final baseUrl = DotEnv().env['API_URL'];
 
@@ -73,18 +75,23 @@ class _LoginScreenState extends State<LoginScreen> {
                                   border: OutlineInputBorder(),
                                   labelText: 'E-mail',
                                 ),
+
                                 style: TextStyle(
                                     fontSize: 20.0, color: Colors.blue[900]),
                                 onFieldSubmitted: (value) async {
                                   _emailFocus.unfocus();
-                                  await submitRequest(context);
+                                  if(_formKey.currentState.validate()){
+                                    await submitRequest(context);
+                                  }
                                 }),
                             Container(
                               height: 50.0,
                               margin: const EdgeInsets.only(top: 32.0),
                               child: RaisedButton(
                                 onPressed: () async {
-                                  await submitRequest(context);
+                                  if(_formKey.currentState.validate()){
+                                    await submitRequest(context);
+                                  }
                                 },
                                 color: Colors.blue[600],
                                 child: Text(
@@ -131,7 +138,8 @@ class _LoginScreenState extends State<LoginScreen> {
         http.Response response = await http.get(uriRequest);
 
         final data = json.decode(response.body)['data'][0];
-
+        final storage = new FlutterSecureStorage();
+        await storage.write(key: "userID",value: data['_id']);
         Navigator.pushReplacementNamed(context, '/home',
             arguments: User(
               data['name'],
@@ -140,6 +148,7 @@ class _LoginScreenState extends State<LoginScreen> {
 
         return;
       } catch (error) {
+        Scaffold.of(context)..hideCurrentSnackBar()..showSnackBar(buildSnackbar("No User Found with this email", Colors.red, Colors.white, Duration(seconds: 3)));
         print(error);
       } finally {
         setState(() {

pubspec.lock

@@ -48,6 +48,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.1"
+  flutter_secure_storage:
+    dependency: "direct main"
+    description:
+      name: flutter_secure_storage
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.3.1+1"
   flutter_test:
     dependency: "direct dev"
     description: flutter

pubspec.yaml

@@ -21,6 +21,7 @@ dependencies:
     sdk: flutter
   http: ^0.12.0+2
   flutter_dotenv: ^2.0.1
+  flutter_secure_storage: ^3.3.1+1
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
@@ -30,13 +31,11 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-
 # For information on the generic Dart part of this file, see the
 # following page: https://www.dartlang.org/tools/pub/pubspec
 
 # The following section is specific to Flutter.
 flutter:
-
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
   # the material Icons class.
@@ -47,13 +46,10 @@ flutter:
     - .env
     - images/logo.png
   #  - images/a_dot_ham.jpeg
-
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.io/assets-and-images/#resolution-aware.
-
   # For details regarding adding assets from package dependencies, see
   # https://flutter.io/assets-and-images/#from-packages
-
   # To add custom fonts to your application, add a fonts section here,
   # in this "flutter" section. Each entry in this list should have a
   # "family" key with the font family name, and a "fonts" key with a