Filter out rooms with "nsfw" in room name or room topic (enabled by default)

vector/src/main/java/im/vector/app/features/roomdirectory/RoomDirectoryViewModel.kt

@@ -28,6 +28,7 @@ import dagger.assisted.Assisted
 import dagger.assisted.AssistedFactory
 import dagger.assisted.AssistedInject
 import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.features.settings.VectorPreferences
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import org.matrix.android.sdk.api.MatrixCallback
@@ -41,12 +42,13 @@ import org.matrix.android.sdk.api.session.room.model.thirdparty.RoomDirectoryDat
 import org.matrix.android.sdk.api.session.room.roomSummaryQueryParams
 import org.matrix.android.sdk.rx.rx
 import timber.log.Timber
+import java.util.Locale
 
-private const val PUBLIC_ROOMS_LIMIT = 20
-
-class RoomDirectoryViewModel @AssistedInject constructor(@Assisted initialState: PublicRoomsViewState,
-                                                         private val session: Session)
-    : VectorViewModel<PublicRoomsViewState, RoomDirectoryAction, RoomDirectoryViewEvents>(initialState) {
+class RoomDirectoryViewModel @AssistedInject constructor(
+        @Assisted initialState: PublicRoomsViewState,
+        vectorPreferences: VectorPreferences,
+        private val session: Session
+) : VectorViewModel<PublicRoomsViewState, RoomDirectoryAction, RoomDirectoryViewEvents>(initialState) {
 
     @AssistedFactory
     interface Factory {
@@ -54,6 +56,12 @@ class RoomDirectoryViewModel @AssistedInject constructor(@Assisted initialState:
     }
 
     companion object : MvRxViewModelFactory<RoomDirectoryViewModel, PublicRoomsViewState> {
+        private const val PUBLIC_ROOMS_LIMIT = 20
+
+        // List of forbidden terms, in lower case
+        private val explicitContentTerms = listOf(
+                "nsfw"
+        )
 
         @JvmStatic
         override fun create(viewModelContext: ViewModelContext, state: PublicRoomsViewState): RoomDirectoryViewModel? {
@@ -62,6 +70,8 @@ class RoomDirectoryViewModel @AssistedInject constructor(@Assisted initialState:
         }
     }
 
+    private val showAllRooms = vectorPreferences.showAllPublicRooms()
+
     private var since: String? = null
 
     private var currentJob: Job? = null
@@ -189,11 +199,21 @@ class RoomDirectoryViewModel @AssistedInject constructor(@Assisted initialState:
 
             since = data.nextBatch
 
+            // Filter
+            val newPublicRooms = data.chunk.orEmpty()
+                    .filter {
+                        showAllRooms
+                                || "${it.name} ${it.topic}".toLowerCase(Locale.ROOT)
+                                .let { str ->
+                                    explicitContentTerms.all { term -> term !in str }
+                                }
+                    }
+
             setState {
                 copy(
                         asyncPublicRoomsRequest = Success(Unit),
                         // It's ok to append at the end of the list, so I use publicRooms.size()
-                        publicRooms = publicRooms.appendAt(data.chunk!!, publicRooms.size)
+                        publicRooms = publicRooms.appendAt(newPublicRooms, publicRooms.size)
                                 // Rageshake #8206 tells that we can have several times the same room
                                 .distinctBy { it.roomId },
                         hasMore = since != null

vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt

@@ -100,6 +100,9 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         private const val SETTINGS_ENABLE_CHAT_EFFECTS = "SETTINGS_ENABLE_CHAT_EFFECTS"
         private const val SETTINGS_SHOW_EMOJI_KEYBOARD = "SETTINGS_SHOW_EMOJI_KEYBOARD"
 
+        // Room directory
+        private const val SETTINGS_ROOM_DIRECTORY_SHOW_ALL_PUBLIC_ROOMS = "SETTINGS_ROOM_DIRECTORY_SHOW_ALL_PUBLIC_ROOMS"
+
         // Help
         private const val SETTINGS_SHOULD_SHOW_HELP_ON_ROOM_LIST_KEY = "SETTINGS_SHOULD_SHOW_HELP_ON_ROOM_LIST_KEY"
 
@@ -399,6 +402,13 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         return defaultPrefs.getBoolean(SETTINGS_ENABLE_SEND_VOICE_FEATURE_PREFERENCE_KEY, false)
     }
 
+    /**
+     * Show all rooms in room directory
+     */
+    fun showAllPublicRooms(): Boolean {
+        return defaultPrefs.getBoolean(SETTINGS_ROOM_DIRECTORY_SHOW_ALL_PUBLIC_ROOMS, false)
+    }
+
     /**
      * Tells which compression level to use by default
      *

vector/src/main/res/values/strings.xml

@@ -497,6 +497,10 @@
         <item quantity="other">%d users</item>
     </plurals>
 
+    <string name="settings_category_room_directory">Room directory</string>
+    <string name="settings_room_directory_show_all_rooms">Show all rooms in the room directory</string>
+    <string name="settings_room_directory_show_all_rooms_summary">Show all rooms, including rooms with explicit content.</string>
+
     <!-- Groups fragment -->
     <string name="groups_invite_header">Invite</string>
     <string name="groups_header">Communities</string>

vector/src/main/res/xml/vector_settings_preferences.xml

@@ -177,4 +177,12 @@
 
     </im.vector.app.core.preference.VectorPreferenceCategory>
 
+    <im.vector.app.core.preference.VectorPreferenceCategory android:title="@string/settings_category_room_directory">
+
+    <im.vector.app.core.preference.VectorSwitchPreference
+        android:key="SETTINGS_ROOM_DIRECTORY_SHOW_ALL_PUBLIC_ROOMS"
+        android:summary="@string/settings_room_directory_show_all_rooms_summary"
+        android:title="@string/settings_room_directory_show_all_rooms" />
+
+    </im.vector.app.core.preference.VectorPreferenceCategory>
 </androidx.preference.PreferenceScreen>