FK: created a workaround for this 2+ months old problem import googles export / takeout of youtube playlists. not perfect (ie. things like "providing the takeout zip and all playlists get imported".. not yet supported).

src/invidious/user/imports.cr

@@ -30,22 +30,76 @@ struct Invidious::User
       return subscriptions
     end
 
-    def parse_playlist_export_csv(user : User, raw_input : String)
+
+    def parse_playlist_export_csv(user : User, raw_input : String, filename : String)
+
+      LOGGER.trace("parse_playlist_export_csv: 01 raw_input '#{raw_input}'\n")
+
+      raw_head = ""			# playlists.csv - info-line for a given playlist in the google export, that's copied above the actual playlist-infos and separated by an empty line from
+      raw_body = ""			# the actual playlist content, ie. a list of videos
+
+      # remove superfluous \n instances in front of and after any non-\n text.. so .. a trim?
+      raw_input = raw_input.strip('\n')
+
       # Split the input into head and body content
-      raw_head, raw_body = raw_input.strip('\n').split("\n\n", limit: 2, remove_empty: true)
+      tmp = raw_input.split("\n\n", limit: 2, remove_empty: true)
+      if tmp.size > 1
+        raw_head = tmp[0]
+        raw_body = tmp[1]
+      else
+        raw_body = tmp[0]
+      end
+
+      LOGGER.trace("parse_playlist_export_csv: 02 raw_head '#{raw_head}' -----\nraw_body '#{raw_body}'\n")
+
+      # TODO create an import-feature (elsewhere), which works for the original google export format, ie. the playlists/ subdirectory content as a ZIP file.. or a complete youtube music export file, but this goes way beyond the scope of a playlist import.
+
+      # defaults
+      title = "title not set"
+      description = "from #{filename}"
+      visibility = "Private"
+      privacy = PlaylistPrivacy::Private
+
+      if (raw_head != "")
+
+	# XXX in 2023/2024 this looked like this:
+        #0           1                     2                                 3                    4                       5                      6                         7                                  8                         9                         10                   11
+        #Playlist ID,Add new videos to top,Playlist image 1 Create timestamp,Playlist image 1 URL,Playlist image 1 Height,Playlist image 1 Width,Playlist title (original),Playlist title (original) language,Playlist create timestamp,Playlist update timestamp,Playlist video order,Playlist visibility
+        #PLc5oiabcabcabcabcabcrOvXgzabcabcm,False,,,,,display name of playlist,,2015-01-01T01:02:03+00:00,2022-10-28T02:23:15+00:00,Manual,Public' ---
     
         # Create the playlist from the head content
         csv_head = CSV.new(raw_head.strip('\n'), headers: true)
         csv_head.next
+        if csv_head[11]
+          LOGGER.info("parse_playlist_export_csv: 03.1 raw_head is filled, doing dual csv playlist info scan. this seems to be one line out of the google export's playlists.csv file, but google never adds these to the several playlist files in an export.")
+          title = csv_head[6]
+          description = "Playlist was imported from file '#{filename}'\n\nCreated on #{csv_head[8]}\nLast updated on #{csv_head[9]}\n"
+          visibility = csv_head[11]
+        else
+          LOGGER.info("parse_playlist_export_csv: 03.2 raw_head is filled, doing old default behaviour.")			# XXX no idea why though.
           title = csv_head[4]
           description = csv_head[5]
           visibility = csv_head[6]
+        end
 
         if visibility.compare("Public", case_insensitive: true) == 0
           privacy = PlaylistPrivacy::Public
         else
           privacy = PlaylistPrivacy::Private
         end
+      else					# choose a title from the provided upload filename
+        LOGGER.info("parse_playlist_export_csv: 03.2 raw_head is empty. Trying to guess fine-looking title and description from the provided upload filename.")
+        if (filename != "")
+          title = filename
+        end
+        nameendpos = filename.rindex(" videos.", filename.size)	# XXX everything up to " videos.csv"
+        if !nameendpos				# XXX everything up to file extension
+          nameendpos = filename.rindex(".", filename.size)
+        end
+        if nameendpos
+          title = filename[0, nameendpos]
+        end
+      end
 
       playlist = create_playlist(title, privacy, user)
       Invidious::Database::Playlists.update_description(playlist.id, description)
@@ -207,7 +261,7 @@ struct Invidious::User
       extension = filename.split(".").last
 
       if extension == "csv" || type == "text/csv"
-        playlist = parse_playlist_export_csv(user, body)
+        playlist = parse_playlist_export_csv(user, body, filename)
         if playlist
           return true
         else