Initial framework in place, non-functional POST & env vars atm

lib/common/apifunctions/request_login_api.dart

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+import 'dart:async';
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+import 'package:local_spend/common/functions/save_current_login.dart';
+import 'package:local_spend/common/functions/show_dialog_single_button.dart';
+import 'package:local_spend/model/json/login_model.dart';
+import 'package:local_spend/config.dart';
+import 'package:flutter/foundation.dart';
+
+Future<LoginModel> requestLoginAPI(
+    BuildContext context, String email, String password) async {
+  //var apiUrl = ConfigWrapper.of(context).apiKey;
+  final url = "https://dev.peartrade.org/api/login";
+
+  Map<String, String> body = {
+    'email': email,
+    'password': password,
+  };
+
+  debugPrint('$body');
+
+  final response = await http.post(
+    url,
+    body: body,
+  );
+
+  debugPrint(response.body);
+
+  if (response.statusCode == 200) {
+    final responseJson = json.decode(response.body);
+    var user = new LoginModel.fromJson(responseJson);
+
+    saveCurrentLogin(responseJson);
+    Navigator.of(context).pushReplacementNamed('/HomePage');
+
+    return LoginModel.fromJson(responseJson);
+  } else {
+    final responseJson = json.decode(response.body);
+
+    saveCurrentLogin(responseJson);
+    showDialogSingleButton(
+        context,
+        "Unable to Login",
+        "You may have supplied an invalid 'Email' / 'Password' combination. Please try again or email an administrator.",
+        "OK");
+    return null;
+  }
+}

lib/common/apifunctions/request_logout_api.dart

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+import 'dart:io';
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+import 'package:local_spend/common/functions/get_token.dart';
+import 'package:local_spend/common/functions/save_logout.dart';
+import 'package:local_spend/model/json/login_model.dart';
+
+Future<LoginModel> requestLogoutAPI(BuildContext context) async {
+  final url = "https://www.yoururl.com/logout";
+
+  var token;
+
+  await getToken().then((result) {
+    token = result;
+  });
+
+  final response = await http.post(
+    url,
+    headers: {HttpHeaders.authorizationHeader: "Token $token"},
+  );
+
+  if (response.statusCode == 200) {
+    saveLogout();
+    return null;
+  } else {
+    saveLogout();
+    return null;
+  }
+}

lib/common/functions/get_token.dart

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+import 'package:shared_preferences/shared_preferences.dart';
+
+getToken() async {
+  SharedPreferences preferences = await SharedPreferences.getInstance();
+
+  String getToken = await preferences.getString("LastToken");
+  return getToken;
+}

lib/common/functions/save_current_login.dart

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+import 'package:local_spend/model/json/login_model.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+saveCurrentLogin(Map responseJson) async {
+  SharedPreferences preferences = await SharedPreferences.getInstance();
+
+  var user;
+  if ((responseJson != null && responseJson.isNotEmpty)) {
+    user = LoginModel.fromJson(responseJson).userName;
+  } else {
+    user = "";
+  }
+  var token = (responseJson != null && responseJson.isNotEmpty)
+      ? LoginModel.fromJson(responseJson).token
+      : "";
+  var email = (responseJson != null && responseJson.isNotEmpty)
+      ? LoginModel.fromJson(responseJson).email
+      : "";
+  var pk = (responseJson != null && responseJson.isNotEmpty)
+      ? LoginModel.fromJson(responseJson).userId
+      : 0;
+
+  await preferences.setString(
+      'LastUser', (user != null && user.length > 0) ? user : "");
+  await preferences.setString(
+      'LastToken', (token != null && token.length > 0) ? token : "");
+  await preferences.setString(
+      'LastEmail', (email != null && email.length > 0) ? email : "");
+  await preferences.setInt('LastUserId', (pk != null && pk > 0) ? pk : 0);
+}

lib/common/functions/save_logout.dart

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+import 'package:shared_preferences/shared_preferences.dart';
+
+saveLogout() async {
+  SharedPreferences preferences = await SharedPreferences.getInstance();
+
+  await preferences.setString('LastUser', "");
+  await preferences.setString('LastToken', "");
+  await preferences.setString('LastEmail', "");
+  await preferences.setInt('LastUserId', 0);
+}

lib/common/functions/show_dialog_single_button.dart

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+import 'package:flutter/material.dart';
+
+void showDialogSingleButton(
+    BuildContext context, String title, String message, String buttonLabel) {
+  // flutter defined function
+  showDialog(
+    context: context,
+    builder: (BuildContext context) {
+      // return object of type Dialog
+      return AlertDialog(
+        title: new Text(title),
+        content: new Text(message),
+        actions: <Widget>[
+          // usually buttons at the bottom of the dialog
+          new FlatButton(
+            child: new Text(buttonLabel),
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+          ),
+        ],
+      );
+    },
+  );
+}

lib/common/platform/platform_scaffold.dart

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+import 'dart:io';
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class PlatformScaffold extends StatelessWidget {
+  final Key key;
+  final PreferredSizeWidget appBar;
+  final Widget body;
+  final Widget floatingActionButton;
+  final FloatingActionButtonLocation floatingActionButtonLocation;
+  final FloatingActionButtonAnimator floatingActionButtonAnimator;
+  final List<Widget> persistentFooterButtons;
+  final Widget drawer;
+  final Widget endDrawer;
+  final Widget bottomNavigationBar;
+  final Color backgroundColor;
+  final bool resizeToAvoidBottomPadding;
+  final bool primary;
+
+  PlatformScaffold(
+      {this.key,
+      this.appBar,
+      this.body,
+      this.floatingActionButton,
+      this.floatingActionButtonLocation,
+      this.floatingActionButtonAnimator,
+      this.persistentFooterButtons,
+      this.drawer,
+      this.endDrawer,
+      this.bottomNavigationBar,
+      this.backgroundColor,
+      this.resizeToAvoidBottomPadding: true,
+      this.primary: true})
+      : assert(primary != null),
+        super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Platform.isIOS
+        ? Scaffold(
+            key: key,
+            appBar: appBar,
+            body: body,
+            floatingActionButton: floatingActionButton,
+            persistentFooterButtons: persistentFooterButtons,
+            floatingActionButtonLocation: floatingActionButtonLocation,
+            floatingActionButtonAnimator: floatingActionButtonAnimator,
+            drawer: endDrawer,
+            endDrawer: drawer,
+            bottomNavigationBar: bottomNavigationBar,
+            backgroundColor: backgroundColor,
+            resizeToAvoidBottomPadding: resizeToAvoidBottomPadding,
+            primary: primary,
+          )
+        : Scaffold(
+            key: key,
+            appBar: appBar,
+            body: body,
+            floatingActionButton: floatingActionButton,
+            persistentFooterButtons: persistentFooterButtons,
+            floatingActionButtonLocation: floatingActionButtonLocation,
+            floatingActionButtonAnimator: floatingActionButtonAnimator,
+            drawer: drawer,
+            endDrawer: endDrawer,
+            bottomNavigationBar: bottomNavigationBar,
+            backgroundColor: backgroundColor,
+            resizeToAvoidBottomPadding: resizeToAvoidBottomPadding,
+            primary: primary,
+          );
+  }
+}

lib/common/widgets/basic_drawer.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:local_spend/common/apifunctions/request_logout_api.dart';
+
+class BasicDrawer extends StatefulWidget {
+  @override
+  _BasicDrawerState createState() => _BasicDrawerState();
+}
+
+class _BasicDrawerState extends State<BasicDrawer> {
+  @override
+  Widget build(BuildContext context) {
+    return Drawer(
+      child: Container(
+        padding: new EdgeInsets.all(32.0),
+        child: ListView(
+          children: <Widget>[
+            ListTile(
+              title: Text(
+                "Submit Receipt",
+                style: TextStyle(color: Colors.black, fontSize: 20.0),
+              ),
+              onTap: () {
+                requestLogoutAPI(context);
+                Navigator.of(context).pushNamed('/ReceiptPage');
+              },
+            ),
+            ListTile(
+              title: Text(
+                "About",
+                style: TextStyle(color: Colors.black, fontSize: 20.0),
+              ),
+              onTap: () {
+                SystemChannels.textInput.invokeMethod('TextInput.hide');
+//              Here I have not implemented an actual about screen, but if you did you would navigate to it's route
+//              Navigator.of(context).pushReplacementNamed('/AboutScreen');
+              },
+            ),
+            ListTile(
+              title: Text(
+                "Logout",
+                style: TextStyle(color: Colors.black, fontSize: 20.0),
+              ),
+              onTap: () {
+                requestLogoutAPI(context);
+                Navigator.of(context).pushReplacementNamed('/LoginPage');
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}