Feature Request: Sync MAL Ratings to Plex

[alexkahler]

When a rating is updated on MAL, it should be automatically synced to Plex. This could be implemented in several ways, with the simplest approach being a scheduled update that periodically checks the user's MAL ratings. Additionally, configurable rules could determine which service (MAL or Plex) takes precedence in case of conflicts.

[alexkahler]

Additional Consideration for MAL to Plex Rating Sync:

Due to the structural differences between MyAnimeList (MAL) and The Movie Database (TMDB), syncing ratings from MAL to Plex can be handled based on user preference in the following ways:

1. Episode-Based Sync: The MAL rating is synced to either the first or last episode of the anime in Plex.
2. Season-Based Sync: The MAL rating is applied to the anime season in Plex.
   If there are multiple MAL pages corresponding to a single TMDB season, the rating could be determined by one of the following methods:

• Highest rating from the relevant MAL entries.
• Average rating of all the relevant MAL entries.
• Latest rating from the most recent MAL entry.

3. Show-Level Sync: The MAL rating is synced to the overall show rating in Plex.
   If there are multiple MAL entries corresponding to different seasons of the anime, the rating could be:

• Highest rating among all MAL entries.
• Average rating across all MAL entries.
• Latest rating from the most recent MAL entry.

Preventing Sync Loops:
To avoid infinite sync loops, Plex-to-MAL rating sync should only occur when rating individual episodes in Plex. This ensures that ratings are updated in a controlled manner.

Handling Sync Conflicts:

In cases where the MAL rating differs from the Plex rating, the conflict resolution can be handled in two ways:

1. MAL Takes Precedence: The MAL rating always overwrites the Plex rating.
2. Skip the Conflict: No rating update is made, leaving the discrepancy in place.

Effect of Show-Level Sync (Rule 3):
If Rule 3 (Show-Level Sync) is used, rating an episode in Plex can effectively adjust the entire show’s rating based on the chosen aggregation method.

If multiple MAL season pages exist with different ratings, the show's overall rating in Plex could, for example, be calculated as the aggregated average of those ratings.