Switch to Map address to state for contacts

This map should be empty in the future and updated based on the incoming
MQTT messages.

A list was not the correct data structure for that since it requires to
iterate over the whole list to find the entry with a certain address.
But this is required to update the state of an already known contact.

2 files changed, 18 insertions, 19 deletions

diff --git a/lib/data.dart b/lib/data.dart
index 93c523d..c0d640f 100644
--- a/lib/data.dart
+++ b/lib/data.dart
@@ -3,12 +3,12 @@ import 'dart:async';
 import 'package:flutter/foundation.dart';
 
 class AppState with ChangeNotifier {
-  List<Contact> contacts = <Contact>[
-    Contact(address: "Living Room Window", isOpen: false),
-    Contact(address: "Front Door", isOpen: true),
-    Contact(address: "Back Door", isOpen: false),
-    Contact(address: "Garage Window", isOpen: true),
-  ];
+  Map<String, bool> contacts = <String, bool>{
+    'Living Room Window': false,
+    'Front Door': true,
+    'Back Door': false,
+    'Garage Window': true,
+  };
 
   Timer? _timer;
 
@@ -23,8 +23,12 @@ class AppState with ChangeNotifier {
       return;
     }
 
-    contacts[0].isOpen = !contacts[0].isOpen;
-    notifyListeners();
+    const String choosen = 'Living Room Window';
+    bool? state = contacts[choosen];
+    if (state != null) {
+      contacts[choosen] = !state;
+      notifyListeners();
+    }
   }
 
   @override
@@ -33,10 +37,3 @@ class AppState with ChangeNotifier {
     super.dispose();
   }
 }
-
-class Contact {
-  final String address;
-  bool isOpen;
-
-  Contact({required this.address, required this.isOpen});
-}
diff --git a/lib/ui.dart b/lib/ui.dart
index d4618cf..4a513c6 100644
--- a/lib/ui.dart
+++ b/lib/ui.dart
@@ -26,13 +26,15 @@ class ContactList extends StatelessWidget {
           return ListView.builder(
             itemCount: state.contacts.length,
             itemBuilder: (BuildContext context, int index) {
-              final Contact contact = state.contacts[index];
+              MapEntry<String, bool> data = state.contacts.entries.elementAt(index);
+              String address = data.key;
+              bool isOpen = data.value;
               return ListTile(
                 leading: Icon(
-                  contact.isOpen ? Icons.meeting_room : Icons.door_front_door,
-                  color: contact.isOpen ? Colors.red : Colors.green,
+                  isOpen ? Icons.meeting_room : Icons.door_front_door,
+                  color: isOpen ? Colors.red : Colors.green,
                 ),
-                title: Text(contact.address),
+                title: Text(address),
               );
             },
           );