yellowjacket/backend/events/events.go

// Package events contains centralized event name constants for
// Wails frontend/backend communication. These names must match
// the corresponding event names in the TypeScript frontend.
package events

//go:generate go run ./cmd/genevents -source events.go -output ../../frontend/src/events.ts

// Playback events (backend → frontend push).
const (
	PlaybackStateChanged = "PlaybackStateChanged"
	PlaybackFinished     = "PlaybackFinished"
	TrackChanged         = "TrackChanged"
	SeekFailed           = "SeekFailed"
	VolumeChanged        = "VolumeChanged"
)

// Queue events (backend → frontend push).
const (
	QueueChanged        = "QueueChanged"
	QueueIndexChanged   = "QueueIndexChanged"
	QueueModeChanged    = "QueueModeChanged"
	QueueTracksModified = "QueueTracksModified"
)

// Config events.
const (
	LibraryConfigChanged   = "LibraryConfigChanged"
	ThemeConfigChanged     = "ThemeConfigChanged"
	TrackListConfigChanged = "TrackListConfigChanged"
	FavoritesConfigChanged = "FavoritesConfigChanged"
	ShortcutsConfigChanged = "ShortcutsConfigChanged"
)

// Playlist events.
const (
	PlaylistCreated        = "PlaylistCreated"
	PlaylistDeleted        = "PlaylistDeleted"
	PlaylistRenamed        = "PlaylistRenamed"
	PlaylistTracksChanged  = "PlaylistTracksChanged"
	PlaylistsRestored      = "PlaylistsRestored"
	DefaultPlaylistChanged = "DefaultPlaylistChanged"
)

// Library events.
const (
	LibraryScanStarted  = "LibraryScanStarted"
	LibraryScanProgress = "LibraryScanProgress"
	LibraryScanComplete = "LibraryScanComplete"
)

// Scan control events.
const (
	LibraryScanCancelled = "LibraryScanCancelled"
	LibraryScanPaused    = "LibraryScanPaused"
	LibraryScanResumed   = "LibraryScanResumed"
)

// Scan queue events.
const (
	LibraryScanQueued       = "LibraryScanQueued"
	LibraryScanQueueDrained = "LibraryScanQueueDrained"
)

// Library CRUD events.
const (
	LibraryAdded   = "LibraryAdded"
	LibraryRenamed = "LibraryRenamed"
	LibraryRemoved = "LibraryRemoved"
)

// Tag writing events.
const (
	TrackMetadataChanged = "TrackMetadataChanged"
	BatchWriteProgress   = "BatchWriteProgress"
)

// Autotag apply events — emitted while an async ApplyAsync job is in flight so the review UI can render per-folder progress.
const (
	AutotagApplyStarted  = "AutotagApplyStarted"  // {groupKey: string, total: int}
	AutotagApplyProgress = "AutotagApplyProgress" // {groupKey, current, total, succeeded, failed}
	AutotagApplyFinished = "AutotagApplyFinished" // {groupKey, succeeded, failed, error}
)

// Autotag prefetch events — emitted by the background worker that scores pending tagging items so sidebar pills populate without the user having to open each folder.
const (
	AutotagPrefetchProgress = "AutotagPrefetchProgress" // {processed, total} — debounce on frontend
	AutotagPrefetchFinished = "AutotagPrefetchFinished" // {processed, total}
)

// Background job events.
const (
	// JobsChanged carries a full snapshot of every known background job
	// (see backend/jobs).  A full snapshot rather than a delta means a
	// component mounting mid-scan is correct from its first event.
	// Emitted coalesced, at most every 250ms.
	JobsChanged = "JobsChanged"
)

// Explore / search index events.
const (
	IndexStatusChanged = "IndexStatusChanged"

	// ArtistDiscographyReady fires (payload: artist MBID string) after a
	// lazy background discography fetch persists into the index, so the
	// artist detail page can re-fetch its top tracks / top releases
	// without the initial request having blocked on a live fetch.
	ArtistDiscographyReady = "ArtistDiscographyReady"

	// ArtistSimilarReady fires (payload: artist MBID string) after a lazy
	// background similar-artists fetch persists into similar_artist_map,
	// so the artist detail page can re-fetch that section without the
	// initial request having blocked on a live LB labs call.
	ArtistSimilarReady = "ArtistSimilarReady"

	// AlbumReleasesReady fires (payload: release-group MBID string) after a
	// lazy background BrowseReleases fetch populates the response cache, so
	// the album detail page can re-fetch its versions / tracklist without
	// the initial request having blocked on a live MusicBrainz browse.
	AlbumReleasesReady = "AlbumReleasesReady"

	// DownloadProvidersChanged fires after a download client is added,
	// edited, enabled/disabled or removed, so the settings page and any
	// open download picker re-read the provider list.
	DownloadProvidersChanged = "DownloadProvidersChanged"

	// DownloadsChanged fires when the set of downloads changes (started,
	// picked, cancelled, cleared).  Per-transfer progress does not use
	// this — it flows through the jobs registry's JobsChanged, which
	// already coalesces high-frequency updates.
	DownloadsChanged = "DownloadsChanged"

	// RequestsChanged fires when the request list gains, loses or
	// retires an entry — including from a background reconcile pass,
	// which is why the list is event-driven rather than fetched once on
	// mount.
	RequestsChanged = "RequestsChanged"
)