add user deletion, email change

lib/BlindMasterScreens/accountManagement/change_password_screen.dart

@@ -0,0 +1,195 @@
+import 'dart:convert';
+import 'package:blind_master/BlindMasterResources/error_snackbar.dart';
+import 'package:blind_master/BlindMasterResources/secure_transmissions.dart';
+import 'package:blind_master/BlindMasterResources/text_inputs.dart';
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+
+class ChangePasswordScreen extends StatefulWidget {
+  const ChangePasswordScreen({super.key});
+
+  @override
+  State<ChangePasswordScreen> createState() => _ChangePasswordScreenState();
+}
+
+class _ChangePasswordScreenState extends State<ChangePasswordScreen> {
+  final oldPasswordController = TextEditingController();
+  final newPasswordController = TextEditingController();
+  final confirmPasswordController = TextEditingController();
+
+  final _formKey = GlobalKey<FormState>();
+
+  @override
+  void dispose() {
+    oldPasswordController.dispose();
+    newPasswordController.dispose();
+    confirmPasswordController.dispose();
+    super.dispose();
+  }
+
+  String? newPasswordValidator(String? input) {
+    if (input == null || input.isEmpty) {
+      return 'New password is required';
+    }
+    if (input.length < 8) {
+      return 'Password must be at least 8 characters';
+    }
+    return null;
+  }
+
+  String? confirmPasswordValidator(String? input) {
+    if (input == null || input.isEmpty) {
+      return 'Please confirm your password';
+    }
+    if (input != newPasswordController.text) {
+      return 'Passwords do not match';
+    }
+    return null;
+  }
+
+  String? oldPasswordValidator(String? input) {
+    if (input == null || input.isEmpty) {
+      return 'Current password is required';
+    }
+    return null;
+  }
+
+  Future<void> handleChangePassword() async {
+    if (!_formKey.currentState!.validate()) {
+      return;
+    }
+
+    try {
+      // Show loading indicator
+      showDialog(
+        context: context,
+        barrierDismissible: false,
+        builder: (BuildContext context) {
+          return Center(
+            child: CircularProgressIndicator(
+              color: Theme.of(context).primaryColorLight,
+            ),
+          );
+        },
+      );
+
+      final payload = {
+        'oldPassword': oldPasswordController.text,
+        'newPassword': newPasswordController.text,
+      };
+
+      final response = await securePost(payload, 'change_password');
+
+      // Remove loading indicator
+      if (mounted) Navigator.of(context).pop();
+
+      if (response == null) {
+        throw Exception('No response from server');
+      }
+
+      if (response.statusCode == 200) {
+        if (!mounted) return;
+        
+        // Show success message
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            backgroundColor: Colors.green[700],
+            content: Text('Password changed successfully'),
+            duration: Duration(seconds: 2),
+          ),
+        );
+
+        // Navigate back to account screen
+        Navigator.pop(context);
+      } else if (response.statusCode == 401) {
+        throw Exception('Current password is incorrect');
+      } else if (response.statusCode == 400) {
+        final body = json.decode(response.body);
+        throw Exception(body['error'] ?? 'Invalid request');
+      } else {
+        throw Exception('Failed to change password');
+      }
+    } catch (e) {
+      // Remove loading indicator if still showing
+      if (mounted && Navigator.of(context).canPop()) {
+        Navigator.of(context).pop();
+      }
+
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(errorSnackbar(e));
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme.of(context).primaryColorLight,
+        foregroundColor: Colors.white,
+        title: Text(
+          'Change Password',
+          style: GoogleFonts.aBeeZee(),
+        ),
+      ),
+      body: SingleChildScrollView(
+        child: Padding(
+          padding: const EdgeInsets.all(20.0),
+          child: Form(
+            key: _formKey,
+            autovalidateMode: AutovalidateMode.onUnfocus,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                SizedBox(height: 20),
+                Text(
+                  'Enter your current password and choose a new password',
+                  style: TextStyle(
+                    fontSize: 16,
+                    color: Colors.grey[700],
+                  ),
+                  textAlign: TextAlign.center,
+                ),
+                SizedBox(height: 30),
+                BlindMasterMainInput(
+                  'Current Password',
+                  controller: oldPasswordController,
+                  password: true,
+                  validator: oldPasswordValidator,
+                ),
+                SizedBox(height: 20),
+                Divider(),
+                SizedBox(height: 20),
+                BlindMasterMainInput(
+                  'New Password',
+                  controller: newPasswordController,
+                  password: true,
+                  validator: newPasswordValidator,
+                ),
+                SizedBox(height: 20),
+                BlindMasterMainInput(
+                  'Confirm New Password',
+                  controller: confirmPasswordController,
+                  password: true,
+                  validator: confirmPasswordValidator,
+                ),
+                SizedBox(height: 30),
+                ElevatedButton(
+                  onPressed: handleChangePassword,
+                  style: ElevatedButton.styleFrom(
+                    backgroundColor: Theme.of(context).primaryColorLight,
+                    foregroundColor: Colors.white,
+                    padding: EdgeInsets.symmetric(vertical: 15),
+                  ),
+                  child: Text(
+                    'Change Password',
+                    style: TextStyle(fontSize: 16),
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}