Move domain data helpers into lib/data

web-player/src/lib/data/search.ts

@@ -0,0 +1,74 @@
+export const SEARCH_FILTERS = ['Todo', 'Canciones', 'Álbumes', 'Playlists', 'Usuarios'] as const;
+export type SearchFilter = (typeof SEARCH_FILTERS)[number];
+export const SEARCH_GROUP_PREVIEW = 4;
+
+export function showGroup(filter: SearchFilter, label: Exclude<SearchFilter, 'Todo'>) {
+	return filter === 'Todo' || filter === label;
+}
+
+export function capped<T>(filter: SearchFilter, list: T[]) {
+	return filter === 'Todo' ? list.slice(0, SEARCH_GROUP_PREVIEW) : list;
+}
+
+export function matchPlaylists<T extends { name: string }>(playlists: T[], query: string): T[] {
+	return query ? playlists.filter((p) => p.name.toLowerCase().includes(query.toLowerCase())) : [];
+}
+
+export function searchCounts(counts: {
+	tracks: number;
+	albums: number;
+	playlists: number;
+	users: number;
+}) {
+	return {
+		Canciones: counts.tracks,
+		Álbumes: counts.albums,
+		Playlists: counts.playlists,
+		Usuarios: counts.users
+	};
+}
+
+export function searchChips(counts: ReturnType<typeof searchCounts>) {
+	const total = counts.Canciones + counts.Álbumes + counts.Playlists + counts.Usuarios;
+	return SEARCH_FILTERS.map((label) => ({
+		label,
+		count: label === 'Todo' ? total : counts[label]
+	}));
+}
+
+export type TopResult<Track, Album, Playlist, User> =
+	| { kind: 'track'; track: Track }
+	| { kind: 'album'; album: Album }
+	| { kind: 'playlist'; playlist: Playlist }
+	| { kind: 'user'; user: User };
+
+export function findTopResult<
+	Track extends { title: string },
+	Album extends { title: string },
+	Playlist extends { name: string },
+	User extends { name: string }
+>(params: {
+	query: string;
+	tracks: Track[];
+	albums: Album[];
+	playlists: Playlist[];
+	users: User[];
+}): TopResult<Track, Album, Playlist, User> | null {
+	const q = params.query.trim().toLowerCase();
+	const startsWithQuery = (value: string) => value.toLowerCase().startsWith(q);
+
+	const userHit = params.users.find((u) => startsWithQuery(u.name));
+	if (userHit) return { kind: 'user', user: userHit };
+	const trackHit = params.tracks.find((track) => startsWithQuery(track.title));
+	if (trackHit) return { kind: 'track', track: trackHit };
+	const albumHit = params.albums.find((album) => startsWithQuery(album.title));
+	if (albumHit) return { kind: 'album', album: albumHit };
+	const playlistHit = params.playlists.find((p) => startsWithQuery(p.name));
+	if (playlistHit) return { kind: 'playlist', playlist: playlistHit };
+
+	if (params.users.length) return { kind: 'user', user: params.users[0] };
+	if (params.tracks.length) return { kind: 'track', track: params.tracks[0] };
+	if (params.albums.length) return { kind: 'album', album: params.albums[0] };
+	if (params.playlists.length) return { kind: 'playlist', playlist: params.playlists[0] };
+	return null;
+}