Added max_file_age to download only newer files.

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

@@ -52,6 +52,7 @@ internal class CommandLineDownloadProgress : DownloadProgressInterface {
 		println("'.' - Previously downloaded file        'e' - Empty file")
 		println("' ' - Ignored media type (weblinks or contacts, for example)")
 		println("'x' - File skipped because of errors - will be tried again at next run")
+		println("'_' - Message is older than max_file_age")
 		println("" + count + " Files to check / download")
 	}
 
@@ -76,6 +77,8 @@ internal class CommandLineDownloadProgress : DownloadProgressInterface {
 		println("Done.")
 	}
 	
+	override fun onMediaTooOld() = show("_")
+
 	private fun show(letter: String) {
 		print(letter)
 		i++

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

@@ -326,6 +326,8 @@ class DownloadManager(internal var client: TelegramClient?, p: DownloadProgressI
 				prog!!.onMediaDownloadedEmpty()
 			} else if (m.downloaded) {
 				prog!!.onMediaAlreadyPresent(m)
+			} else if (IniSettings.max_file_age!=null && (System.currentTimeMillis() / 1000) - msg.date > IniSettings.max_file_age * 24 * 60 * 60) {
+				prog!!.onMediaTooOld()
 			} else {
 				try {
 					val result = m.download()

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

@@ -29,4 +29,5 @@ interface DownloadProgressInterface {
 	fun onMediaSkipped()
 	fun onMediaAlreadyPresent(file_manager: AbstractMediaFileManager)
 	fun onMediaDownloadFinished()
+	fun onMediaTooOld()
 }

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

@@ -82,4 +82,5 @@ object IniSettings {
 		get() = getStringList("whitelist_channels")
 	val blacklist_channels: List<String>?
 		get() = getStringList("blacklist_channels")
+	val max_file_age = getInt("max_file_age")
 }

src/main/resources/config.sample.ini

@@ -18,6 +18,9 @@
 ## Download media files
 # download_media = true
 
+## Only download media files from messages that are never than x days.
+## Leave unset to download all media files.
+# max_file_age = 7
 
 
 ## Downloads of channels and supergroups