Merge pull request libre-tube#7320 from FineFindus/fix/update-last-watchtime

fix(Feed): only update `LastFeedWatchedTime` when update time is newer

Author: FineFindus

app/src/main/java/com/github/libretube/helpers/PreferenceHelper.kt

@@ -104,8 +104,12 @@ object PreferenceHelper {
         return getString(PreferenceKeys.LAST_STREAM_VIDEO_ID, "")
     }
 
-    fun setLastFeedWatchedTime(time: Long) {
-        putLong(PreferenceKeys.LAST_WATCHED_FEED_TIME, time)
+    fun updateLastFeedWatchedTime(time: Long) {
+        // only update the time if the time is newer
+        // this avoids cases, where the user last saw an older video, which had already been seen,
+        // causing all following video to be incorrectly marked as unseen again
+        if (getLastCheckedFeedTime() < time)
+            putLong(PreferenceKeys.LAST_WATCHED_FEED_TIME, time)
     }
 
     fun getLastCheckedFeedTime(): Long {

app/src/main/java/com/github/libretube/ui/fragments/SubscriptionsFragment.kt

@@ -398,7 +398,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         binding.toggleSubs.text = getString(R.string.subscriptions)
 
         feed.firstOrNull { !it.isUpcoming }?.uploaded?.let {
-            PreferenceHelper.setLastFeedWatchedTime(it)
+            PreferenceHelper.updateLastFeedWatchedTime(it)
         }
 
         binding.subRefresh.isRefreshing = false