Synth Riderz Playlist Downloader

Automatically download all custom songs from Synth Riderz playlists when starting the game.

Installing

Prepare Synth Riders for modding by following the MelonLoader wiki guide
Download the newest version of SRPlaylistDownloader from the Releases section. Your web browser may warn you about the .zip file because it contains .dll files - this is normal, and is how mods are built.
Extract the contents of the .zip file to <path-to-synth-riders>\Mods (create a new directory if it doesn't exist). On Windows, this will be at C:\Program Files (x86)\Steam\steamapps\common\SynthRiders\Mods. You should end up with something like SynthRiders\Mods\SRPlaylistDownloader.dll.
Run Synth Riders and enjoy!

Using

This mod hooks into the "Refresh Song List" button at the top of the main menu. TO use it, simply hit that button and select the "Find New" or "Refresh All" options ("Find New" is generally faster).

This can take a while if a lot of songs need to be downloaded.

Implementation Details

The main functionality is triggered from a manual song list refresh
All playlist files under SynthRiders\Playlist are parsed, and all song hashes are put into a HashSet
All OST/DLC tracks also have their hashes added to this "existing songs" HashSet
All song hashes found in playlists that aren't in the existing set will be downloaded from synthriderz.com
- OST/DLC will be "downloaded" from synthriderz.com, but without a Content-Disposition header in the response, they will be ignored
- Files are downloaded first to SynthRiders\CustomSongs\temp\temp_<hash>.synth, then moved to the final location in CustomSongs with the proper name once the download finishes
Downloads are synchronous, using Coroutines. In the future they could be parallelized, but for now this is simple and robust

Known Issues

If there are unrecognized entries in a playlist file (e.g. a hash that doesn't exist on synthriderz.com, like an unpublished draft), these will "download" every time and fail quickly every time. If you see a few really quick "downloads" when refreshing the song list, this is why. This should not have any negative effects except for increased confusion :)

Disclaimer

This mod is not affiliated with Synth Riders or Kluge Interactive. Use at your own risk.

bookdude13 / SRPlaylistDownloader