Added blacklist_extensions to skip some file types completely from being downloaded.

src/main/kotlin/de/fabianonline/telegram_backup/DownloadManager.kt

@@ -261,6 +261,8 @@ class DownloadManager(val client: TelegramClient, val prog: DownloadProgressInte
 					prog.onMediaSkipped()
 				} else if (settings.max_file_size>0 && settings.max_file_size*1024*1024 > m.size) {
 					prog.onMediaSkipped()
+				} else if (settings.blacklist_extensions.contains(m.extension)) {
+					prog.onMediaSkipped()
 				} else {
 					try {
 						val result = m.download(prog)

src/main/kotlin/de/fabianonline/telegram_backup/Settings.kt

@@ -29,6 +29,7 @@ class Settings(val file_base: String, val database: Database, val cli_settings:
 	val blacklist_channels = sf.getStringList("blacklist_channels", default=LinkedList<String>())
 	val max_file_age = sf.getInt("max_file_age", default=-1)
 	val max_file_size = sf.getInt("max_file_size", default=-1)
+	val blacklist_extensions = sf.getStringList("blacklist_extensions", default=LinkedList<String>())
 
 	private fun get_setting_list(name: String): List<String>? {
 		return ini_settings[name]

src/main/resources/config.sample.ini

@@ -26,6 +26,10 @@
 ## Leave unset to download media files regardless of their size.
 # max_file_size = 5
 
+## Don't download media files having these extensions.
+## You can add this line multiple times to blacklist more than one extension.
+# blacklist_extensions = jpg
+# blacklist_extensions = avi
 
 ## Downloads of channels and supergroups
 ## Here you can specify which channels and supergroups