add login method

lib/ui/login_page.dart

+// ignore_for_file: prefer_final_fields, unused_field, non_constant_identifier_names, prefer_const_constructors
+
+import 'dart:convert';
+// import 'dart:ui';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:google_fonts/google_fonts.dart';
+import 'package:http/http.dart' as http;
+import 'package:manager_queue/helper/config.dart';
+import 'package:manager_queue/helper/state.dart';
+import 'package:manager_queue/main.dart';
+import 'package:manager_queue/main_page.dart';
+
+class LoginPage extends StatefulWidget {
+  const LoginPage({Key? key}) : super(key: key);
+
+  @override
+  State<LoginPage> createState() => _LoginPageState();
+}
+
+class _LoginPageState extends State<LoginPage> {
+  var _pinController = TextEditingController();
+
+  var _baseUrlController = TextEditingController();
+
+  bool _showPassword = false;
+  void _togglevisibility() {
+    setState(() {
+      _showPassword = !_showPassword;
+    });
+  }
+
+  // String baseUrl = prefs.getString('base_url') ?? "";
+
+  Future<List<String>> loginUser(BuildContext context) async {
+    String loginApi = baseUrlApi + apiUrlLogin;
+    var pinData = _pinController.text;
+    await prefs.setString('pin_user', pinData);
+    List<String> responseLogin = [];
+    if (_pinController.text.isNotEmpty) {
+      final String? session_keys = prefs.getString('session_key');
+      // print(session_keys);
+      Map data = {"session_key": session_keys, "method": "PIN", "key": pinData};
+      var dataEncode = jsonEncode(data);
+      var response = await http.post(Uri.parse(loginApi), body: dataEncode);
+
+      if (response.statusCode == 200) {
+        var status = jsonDecode(response.body)['status'];
+        var msg = jsonDecode(response.body)['msg'];
+        if (status == statusOk) {
+          // print("okeee");
+          var userId = jsonDecode(response.body)['data']['user']['id'];
+          await prefs.setString('user_id', userId);
+          // Navigator.of(context).pushReplacement(
+          //     MaterialPageRoute(builder: (context) => KitchenDisplay()));
+          responseLogin.add(status);
+          responseLogin.add(msg);
+          return responseLogin;
+        } else {
+          // final snackBar = SnackBar(content: Text("password is not correct!"));
+          // Scaffold.of(context).showSnackBar(SnackBar(content: Text("asaaaaa")));
+          FocusScopeNode currentFocus = FocusScope.of(context);
+          if (!currentFocus.hasPrimaryFocus) {
+            currentFocus.unfocus();
+          }
+          // print("pin salah");
+
+          responseLogin.add(status);
+          responseLogin.add(msg);
+          return responseLogin;
+        }
+      } else {
+        responseLogin.add("error");
+        responseLogin.add("Gagal terhubung ke server");
+        return responseLogin;
+      }
+    } else {
+      responseLogin.add("error");
+      responseLogin.add("Pin tidak boleh kosong");
+      return responseLogin;
+    }
+  }
+
+  @override
+  void initState() {
+    // getUserId().then((value) {
+    //   print(value);
+    //   if (value != '') {
+    //     Navigator.pushNamed(context, '/login');
+    //   }
+    // });
+    // print("login page");
+
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Container(
+        padding: EdgeInsets.all(10),
+        color: Colors.indigo,
+        child: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            crossAxisAlignment: CrossAxisAlignment.center,
+            children: <Widget>[
+              Text(
+                "Welcome to Ravintola",
+                style: GoogleFonts.openSans(
+                  color: Colors.white,
+                  fontSize: MediaQuery.of(context).size.width * 0.04,
+                ),
+              ),
+              SizedBox(
+                height: MediaQuery.of(context).size.height * 0.04,
+              ),
+              TextFormField(
+                controller: _pinController,
+                obscureText: !_showPassword,
+                keyboardType: TextInputType.number,
+                textInputAction: TextInputAction.go,
+                inputFormatters: [FilteringTextInputFormatter.digitsOnly],
+                decoration: InputDecoration(
+                  border: OutlineInputBorder(),
+                  labelText: "Masukkan PIN",
+                  labelStyle: GoogleFonts.openSans(color: Colors.grey[600]),
+                  focusedBorder: OutlineInputBorder(
+                    borderSide: BorderSide(color: Colors.white),
+                  ),
+                  enabledBorder: OutlineInputBorder(
+                    borderSide: BorderSide(
+                      // color: Colors.black,
+                      width: 2.0,
+                    ),
+                  ),
+                  suffixIcon: GestureDetector(
+                    onTap: () {
+                      _togglevisibility();
+                    },
+                    child: Icon(
+                      _showPassword ? Icons.visibility : Icons.visibility_off,
+                    ),
+                  ),
+                ),
+                style: GoogleFonts.openSans(color: Colors.grey[300]),
+              ),
+              SizedBox(
+                height: MediaQuery.of(context).size.height * 0.02,
+              ),
+              ElevatedButton(
+                onPressed: () async {
+                  // print("testt");
+
+                  var toLogin = await loginUser(context);
+                  if (toLogin[0] == statusOk) {
+                    Navigator.of(context).pushReplacement(
+                        MaterialPageRoute(builder: (context) => MainPage()));
+                  } else {
+                    final snackBar = SnackBar(
+                      content: Text(
+                        toLogin[1],
+                        style: GoogleFonts.openSans(),
+                      ),
+                      action: SnackBarAction(
+                        label: 'Close',
+                        onPressed: () {
+                          // Some code to undo the change.
+                        },
+                      ),
+                    );
+                    ScaffoldMessenger.of(context).showSnackBar(snackBar);
+                  }
+                },
+                child: Text("Login"),
+                style: ElevatedButton.styleFrom(
+                  primary: Colors.green,
+                ),
+              ),
+              SizedBox(
+                height: MediaQuery.of(context).size.height * 0.06,
+              ),
+              // Container(
+              //   child: Text(
+              //     "Base url = " + baseUrl,
+              //     style: GoogleFonts.openSans(color: Colors.grey[200]),
+              //   ),
+              // ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}