Channel QR Code scanner [WIP]

flutter/lib/models/scan_result.dart

@@ -0,0 +1,75 @@
+import 'package:simplecloudnotifier/models/channel.dart';
+
+enum ScanResultMode { ChannelSubscribe, MessageSend, Channel }
+
+abstract class ScanResult {
+  ScanResultMode get mode;
+
+  static ScanResult? parse(String v) {
+    var lines = v.split('\n');
+
+    if (lines.length == 1 && lines[0].startsWith('https://simplecloudnotifier.de?')) {
+      final v = Uri.tryParse(lines[0]);
+
+      if (v != null && v.queryParameters.containsKey('preset_user_id') && v.queryParameters.containsKey('preset_user_key')) {
+        return ScanResultMessageSend(userID: v.queryParameters['preset_user_id']!, userKey: v.queryParameters['preset_user_key']);
+      }
+      if (v != null && v.queryParameters.containsKey('preset_user_id') && v.queryParameters.containsKey('preset_user_key')) {
+        return ScanResultMessageSend(userID: v.queryParameters['preset_user_id']!, userKey: null);
+      }
+    }
+
+    if (lines.length == 6 && lines[0] == '@scn.channel.subscribe' && lines[1] == 'v1') {
+      return ScanResultChannelSubscribe(channelDisplayName: lines[2], ownerUserID: lines[3], channelID: lines[4], subscribeKey: lines[5]);
+    }
+
+    if (lines.length == 5 && lines[0] == '@scn.channel' && lines[1] == 'v1') {
+      if (lines.length != 4) return null;
+
+      return ScanResultChannel(channelDisplayName: lines[2], ownerUserID: lines[3], channelID: lines[4]);
+    }
+
+    return null;
+  }
+
+  static String createChannelQR(Channel channel) {
+    return '@scn.channel' + '\n' + "v1" + '\n' + channel.displayName + '\n' + channel.ownerUserID + '\n' + channel.channelID;
+  }
+
+  static String createChannelSubscribeQR(Channel channel, String subscribeKey) {
+    return '@scn.channel.subscribe' + '\n' + "v1" + '\n' + channel.displayName + '\n' + channel.ownerUserID + '\n' + channel.channelID + '\n' + subscribeKey;
+  }
+}
+
+class ScanResultMessageSend extends ScanResult {
+  final String userID;
+  final String? userKey;
+
+  ScanResultMessageSend({required this.userID, required this.userKey});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.MessageSend;
+}
+
+class ScanResultChannel extends ScanResult {
+  final String channelDisplayName;
+  final String ownerUserID;
+  final String channelID;
+
+  ScanResultChannel({required this.channelDisplayName, required this.ownerUserID, required this.channelID});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.Channel;
+}
+
+class ScanResultChannelSubscribe extends ScanResult {
+  final String channelDisplayName;
+  final String ownerUserID;
+  final String channelID;
+  final String subscribeKey;
+
+  ScanResultChannelSubscribe({required this.channelDisplayName, required this.ownerUserID, required this.channelID, required this.subscribeKey});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.ChannelSubscribe;
+}