Allow to enable URL preview in encrypted rooms

Change-Id: Iac2fff47cc86bd77203c44ce0f39ff131c60a16c

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewModel.kt

@@ -1395,7 +1395,7 @@ class RoomDetailViewModel @AssistedInject constructor(
         if (vectorPreferences.showUrlPreviews()) {
             withState { state ->
                 snapshot
-                        .takeIf { state.asyncRoomSummary.invoke()?.isEncrypted == false }
+                        .takeIf { state.asyncRoomSummary.invoke()?.isEncrypted == false || vectorPreferences.allowUrlPreviewsInEncryptedRooms() }
                         ?.forEach {
                             previewUrlRetriever.getPreviewUrl(it.root, viewModelScope)
                         }

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

@@ -186,6 +186,7 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         private const val SETTINGS_UNIMPORTANT_COUNTER_BADGE = "SETTINGS_UNIMPORTANT_COUNTER_BADGE"
         private const val SETTINGS_SIMPLIFIED_MODE = "SETTINGS_SIMPLIFIED_MODE"
         private const val SETTINGS_LABS_ALLOW_MARK_UNREAD = "SETTINGS_LABS_ALLOW_MARK_UNREAD"
+        private const val SETTINGS_ALLOW_URL_PREVIEW_IN_ENCRYPTED_ROOM_KEY = "SETTINGS_ALLOW_URL_PREVIEW_IN_ENCRYPTED_ROOM_KEY"
 
         private const val DID_ASK_TO_ENABLE_SESSION_PUSH = "DID_ASK_TO_ENABLE_SESSION_PUSH"
 
@@ -801,6 +802,15 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         return defaultPrefs.getBoolean(SETTINGS_SHOW_URL_PREVIEW_KEY, true)
     }
 
+    /**
+     * Tells if the user wants to see URL previews in encrypted rooms as well
+     *
+     * @return true if the user wants to see URL previews in encrypted rooms
+     */
+    fun allowUrlPreviewsInEncryptedRooms(): Boolean {
+        return defaultPrefs.getBoolean(SETTINGS_ALLOW_URL_PREVIEW_IN_ENCRYPTED_ROOM_KEY, false)
+    }
+
     /**
      * Enable or disable the analytics tracking.
      *

vector/src/main/res/values-de/strings_sc.xml

@@ -46,6 +46,8 @@
 
     <string name="labs_mark_rooms_unread">Chats als ungelesen markieren</string>
     <string name="labs_mark_rooms_unread_summary">Erlaube, Chats als ungelesen zu markieren. Andere Matrix-Clients unterstützen diese Funktionalität möglicherweise noch nicht.</string>
+    <string name="url_previews_in_encrypted_rooms">URL-Vorschau in verschlüsselten Chats</string>
+    <string name="url_previews_in_encrypted_rooms_summary">Dies offenbart in Nachrichten enthaltene URLs gegenüber dem Homeserver!</string>
 
     <string name="login_mobile_device_sc">SchildiChat Android</string>
     <string name="bottom_action_all">Übersicht</string>

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

@@ -46,6 +46,8 @@
 
     <string name="labs_mark_rooms_unread">Mark chats as unread</string>
     <string name="labs_mark_rooms_unread_summary">Allow to mark chats as unread. Other matrix clients might not support this functionality yet.</string>
+    <string name="url_previews_in_encrypted_rooms">URL previews in encrypted chats</string>
+    <string name="url_previews_in_encrypted_rooms_summary">This will leak URLs from your messages to your homeserver!</string>
 
     <string name="login_mobile_device_sc">SchildiChat Android</string>
     <string name="bottom_action_all">Overview</string>

vector/src/main/res/xml/vector_settings_labs.xml

@@ -40,6 +40,12 @@
         android:title="@string/settings_system_dark_theme_pre_ten"
         android:summary="@string/settings_system_dark_theme_pre_ten_summary" />
 
+    <im.vector.app.core.preference.VectorSwitchPreference
+        android:defaultValue="false"
+        android:key="SETTINGS_ALLOW_URL_PREVIEW_IN_ENCRYPTED_ROOM_KEY"
+        android:title="@string/url_previews_in_encrypted_rooms"
+        android:summary="@string/url_previews_in_encrypted_rooms_summary" />
+
     <im.vector.app.core.preference.VectorSwitchPreference
         android:defaultValue="false"
         android:key="SETTINGS_LABS_ALLOW_MARK_UNREAD"