feat(match): Ensemble matching for episodes

[ShanaryS]

This feature allows grabbing rss/announce and searching of seasons from individual episodes. Along with the changes in v6, this feature completes all possible matches from cross-seed aside from tweaks.

This works by introducing a new type of searchee, a virtual searchee. This is needed since the episodes are sourced from multiple torrents and folders. As such, it hash no infoHash or path. All areas of the application where these were used for logic has been updated to reflect this new possiblity. In general, this should be treated as a data based searchee if searchee.path is not need. So most checks went from if (searchee.path) to if (!searchee.infoHash) so that virtual searchees are included.

Virtual searchees also have absolute file paths instead of relative to make linking easier. This required some small changes when linking as well as changes in perfect matches. For a perfect match, when the item is a virtual searchee it only requires a name match on each file rather than path.

To support rss/announce, the information needed to be cached. I opted to use an in memory database as I did not want to add to the existing which would need migrations. For 2k entries, it takes about ~3s on startup and about 1MB of memory.

This feature works best with search. Due to the nature of the problem, it's easier to find matches by searching rather than from rss/announce, especially for anime.

Also, I added a check to see if the size changed for data based searches and report TORRENT_NOT_COMPLETE if it hash. A similar check was done for ensemble but on each file.

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The implementation is to parse titles and put them in a standard format cleanTitle.season.resolution.source-RlsGrp called key. As such two new regexs were added for resolution and source. These are necessary to restrict searching for mixed resolutions and sources. Once there is more than 2 distinct episodes that all have the same key, it's eligible to be searched. The searchee name will be the key while the files will be the absolute path to the largest file in each episode torrent.

Some additional checks are put into place. The highest episode number is used as the total number in the season. We then check for the presence of all episodes down to E01 and if more than the seasonFromEpisodes is missing, it won't be created. It also checks to ensure that the file with the newest modified time is at least 8 days old since most episodes are released weekly. Of course this will search if there is a mid season break and get no results but the alternative would be to use a sonarr (likely will later). To account for this, if the age of the newest episode is after its last search time, we will search it again immediately (assuming it's more than 8 days old).

Note

• Working from search
• Working from rss/announce
• Config option is validated
• Search/rss/announce works when feature is disabled
• Properly implement getAllDownloadDirs for rTorrent (Currently API call for each, not comfortable with API)