From 8de367e03f1d9b1640e730e35988a292f022cbf5 Mon Sep 17 00:00:00 2001
From: decarvalhobo <marcio.decarvalho@student.uclouvain.be>
Date: Mon, 2 Dec 2019 22:20:43 +0100
Subject: [PATCH] fix issue: thumbnail update when element deleted + thumbnail
 update when element added and no thumbnail

---
 .../local/dialog/PlaylistAppendDialog.java       | 16 +++++++++++++---
 .../local/playlist/LocalPlaylistFragment.java    | 14 ++++++++++++++
 .../local/playlist/LocalPlaylistManager.java     |  4 ++++
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
index ac02b0b37..72df33576 100644
--- a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
+++ b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
@@ -152,9 +152,19 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
         final Toast successToast = Toast.makeText(getContext(),
                 R.string.playlist_add_stream_success, Toast.LENGTH_SHORT);
 
-        playlistDisposables.add(manager.appendToPlaylist(playlist.uid, streams)
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(ignored -> successToast.show()));
+        if(playlist.thumbnailUrl.equals("https://i.ytimg.com/")){   //empty playlist
+            playlistDisposables.add(manager.createPlaylist(playlist.name, streams)
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(ignored -> successToast.show()));
+            playlistDisposables.add(manager.deletePlaylist(playlist.uid)
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(ignored -> successToast.show()));
+        }
+        else {
+            playlistDisposables.add(manager.appendToPlaylist(playlist.uid, streams)
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(ignored -> successToast.show()));
+        }
 
         getDialog().dismiss();
     }
diff --git a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
index c60cdac3f..35451d344 100644
--- a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
@@ -413,10 +413,24 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         disposables.add(disposable);
     }
 
+    private void updateThumbnailUrl() {
+        String newThumbnailUrl;
+
+        if(!itemListAdapter.getItemsList().isEmpty()){
+            newThumbnailUrl = ((PlaylistStreamEntry)itemListAdapter.getItemsList().get(0)).thumbnailUrl;
+        }
+        else newThumbnailUrl = "https://i.ytimg.com/";
+
+        changeThumbnailUrl(newThumbnailUrl);
+    }
+
     private void deleteItem(final PlaylistStreamEntry item) {
         if (itemListAdapter == null) return;
 
         itemListAdapter.removeItem(item);
+        if(playlistManager.getPlaylistThumbnail(playlistId).equals(item.thumbnailUrl)) // If yes change for the first thumbnail of the list
+            updateThumbnailUrl();
+
         setVideoCount(itemListAdapter.getItemsList().size());
         saveChanges();
     }
diff --git a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
index c025b360a..a856fbae5 100644
--- a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
+++ b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
@@ -103,6 +103,10 @@ public class LocalPlaylistManager {
         return modifyPlaylist(playlistId, null, thumbnailUrl);
     }
 
+    public String getPlaylistThumbnail(final long playlistId) {
+        return playlistTable.getPlaylist(playlistId).blockingFirst().get(0).getThumbnailUrl();
+    }
+
     private Maybe<Integer> modifyPlaylist(final long playlistId,
                                           @Nullable final String name,
                                           @Nullable final String thumbnailUrl) {