Tweak the power levels when creating a space (#6012)

* Tweak the power levels when creating a space

* Also tweak the `invite` power levels for public access rooms

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClient.kt

@@ -370,6 +370,9 @@ class RustMatrixClient(
 
     override suspend fun createRoom(createRoomParams: CreateRoomParameters): Result<RoomId> = withContext(sessionDispatcher) {
         runCatchingExceptions {
+            val hasPublicAccess = createRoomParams.preset == RoomPreset.PUBLIC_CHAT || createRoomParams.joinRuleOverride == JoinRule.Public
+            val powerLevels = defaultRoomCreationPowerLevels(isSpace = createRoomParams.isSpace, isPublic = hasPublicAccess)
+
             val rustParams = RustCreateRoomParameters(
                 name = createRoomParams.name,
                 topic = createRoomParams.topic,
@@ -383,12 +386,12 @@ class RustMatrixClient(
                 },
                 invite = createRoomParams.invite?.map { it.value },
                 avatar = createRoomParams.avatar,
-                powerLevelContentOverride = defaultRoomCreationPowerLevels.copy(
+                powerLevelContentOverride = powerLevels.copy(
                     invite = if (createRoomParams.joinRuleOverride == JoinRule.Knock) {
                         // override the invite power level so it's the same as kick.
                         RoomMember.Role.Moderator.powerLevel.toInt()
                     } else {
-                        null
+                        powerLevels.invite
                     }
                 ),
                 joinRuleOverride = createRoomParams.joinRuleOverride?.map(),
@@ -833,18 +836,23 @@ class RustMatrixClient(
     }
 }
 
-private val defaultRoomCreationPowerLevels = PowerLevels(
+private fun defaultRoomCreationPowerLevels(isPublic: Boolean, isSpace: Boolean) = PowerLevels(
     usersDefault = null,
-    eventsDefault = null,
+    // Only admins should be able to send events in general
+    eventsDefault = if (isSpace) 100 else null,
     stateDefault = null,
     ban = null,
     kick = null,
     redact = null,
-    invite = null,
+    invite = if (isPublic) 0 else 50,
     notifications = null,
     users = mapOf(),
-    events = mapOf(
-        "m.call.member" to 0,
-        "org.matrix.msc3401.call.member" to 0,
-    )
+    events = if (!isSpace) {
+        mapOf(
+            "m.call.member" to 0,
+            "org.matrix.msc3401.call.member" to 0,
+        )
+    } else {
+        mapOf()
+    }
 )