From 0aa5ef9eeaaaa7520a4ddc710f89d23fce282da6 Mon Sep 17 00:00:00 2001
From: Jayesh Nirve <j.nirve@famedly.com>
Date: Wed, 20 Jul 2022 18:44:03 +0530
Subject: [PATCH] feat: allow enabling group calls in already created rooms

---
 lib/src/room.dart | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lib/src/room.dart b/lib/src/room.dart
index 6a6bfac0..b28bec51 100644
--- a/lib/src/room.dart
+++ b/lib/src/room.dart
@@ -1645,6 +1645,35 @@ class Room {
   /// The level required to ban a user.
   bool get canBan => _hasPermissionFor('ban');
 
+  /// if returned value is not null `org.matrix.msc3401.call.member` is present
+  /// and group calls can be used
+  bool get groupCallsEnabled {
+    final powerLevelMap = getState(EventTypes.RoomPowerLevels)?.content;
+    final groupCallPowerLevel =
+        powerLevelMap?.tryGetMap('events')?['org.matrix.msc3401.call.member'];
+    return groupCallPowerLevel != null &&
+        groupCallPowerLevel >= powerLevelMap?['users_default'];
+  }
+
+  /// sets the `org.matrix.msc3401.call.member` power level to users default for
+  /// group calls, needs permissions to change power levels
+  Future<void> enableGroupCalls() async {
+    if (!canChangePowerLevel) return;
+    final currentPowerLevelsMap = getState(EventTypes.RoomPowerLevels)?.content;
+    if (currentPowerLevelsMap != null) {
+      final newPowerLevelMap = currentPowerLevelsMap;
+      newPowerLevelMap['events'].addAll({
+        'org.matrix.msc3401.call.member': currentPowerLevelsMap['users_default']
+      });
+      await client.setRoomStateWithKey(
+        id,
+        EventTypes.RoomPowerLevels,
+        '',
+        newPowerLevelMap,
+      );
+    }
+  }
+
   /// The default level required to send message events. Can be overridden by the events key.
   bool get canSendDefaultMessages =>
       _hasPermissionFor('events_default') &&