Foobar2000 SpiderMonkeyPanel script for faster track deletion when playing tracks

funky-delete.js

/** @param {FbMetadbHandle} track */
const playTrack = track => {
	const result = fb.RunContextCommandWithMetadb("Play", track)
	if (result !== true) {
		throw new Error(`Play command failed for track "${track.Path}"`)
	}
}

const makeLogger = (...prefixed) => (
	(...args) => {
		console.log(...prefixed, ...args)
	}
)

/** @param {FbMetadbHandleList} tracks */
const deleteTracks = tracks => {
	const command = tracks.Count > 1 ? "Delete files" : "Delete file"
	fb.RunContextCommandWithMetadb(command, tracks)
}

/**
 * @param {FbMetadbHandleList} tracksToAvoid
 * @param {(...args: any[]) => void} log
 */
const assurePlayheadNotOnTracks = (tracksToAvoid, log) => {
	const nowPlaying = fb.GetNowPlaying()
	const isPaused = nowPlaying === null

	if (isPaused) {
		log("paused")
		return
	}

	const nowPlayingTrackIsInTracks = tracksToAvoid.Convert().some(t => t.Path === nowPlaying.Path)

	if (!nowPlayingTrackIsInTracks) {
		log("nowplaying is not in tracks")
		return
	}

	const currentPlaylist = plman.GetPlaylistItems(plman.ActivePlaylist)
	const firstTrackToAvoid = getHandleFromListAtIndex(tracksToAvoid, 0)
	const playlistPositionOfFirstToAvoid = currentPlaylist.Find(firstTrackToAvoid)

	if (playlistPositionOfFirstToAvoid === -1) {
		log("First track to avoid not found in active playlist")
	}
	
	const nextValidTrack	= currentPlaylist.Convert()
		.find(track => {
			const isNotToAvoid = tracksToAvoid.Find(track) === -1
			const trackPosition = currentPlaylist.Find(track)
			const isAfterFirstToAvoid = trackPosition > playlistPositionOfFirstToAvoid
			return isNotToAvoid && isAfterFirstToAvoid
		})
		
	if (nextValidTrack === undefined) {
		log("no track to jump to, stopping playback")
		fb.Stop()
	} else {
		log("playing " + nextValidTrack.Path)
		try {
			playTrack(nextValidTrack)
		} catch (error) {
			log("error: " + error.message)

			// show context menu of next valid track with options for debugging purposes
			const ctx = fb.CreateContextMenuManager()
			ctx.InitContext(new FbMetadbHandleList(nextValidTrack))
			const menu = window.CreatePopupMenu()
			ctx.BuildMenu(menu, 1)
			menu.TrackPopupMenu(0, 0)
			fb.Stop()
		}
	}
}

const funkyDelete = () => {
	const log = makeLogger("funkyDelete:")

	const selectedTracks = fb.GetSelections()
	assurePlayheadNotOnTracks(selectedTracks, log)

	for (const track of selectedTracks.Convert()) {
		log(`deleting ${track.Path}`)
	}

	deleteTracks(selectedTracks)
}