274 lines
11 KiB
Swift
274 lines
11 KiB
Swift
import Foundation
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struct NotSignedIn: LocalizedError {
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var errorDescription: String? { "Not signed in to a music server" }
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}
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struct PlainError: LocalizedError {
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let message: String
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init(_ m: String) { message = m }
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var errorDescription: String? { message }
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}
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/// Every music server in Settings, pooled into one library. Listings run on each server and are
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/// joined in Settings order; anything keyed (an album, a track's file, a playlist) goes back to
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/// the server its key is tagged with (see MediaServer).
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final class PlexClient: @unchecked Sendable {
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static let product = "Stemify"
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private let http: Http
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private let settings: Settings
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private let lock = NSLock()
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private var builtFrom = "\u{0}"
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private var built: [MediaSource] = []
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init(http: Http, settings: Settings) {
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self.http = http
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self.settings = settings
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}
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func make(_ s: MediaServer) -> MediaSource {
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s.kind == .plex ? PlexServer(http: http, settings: settings, server: s) : JellyfinClient(http: http, settings: settings, server: s)
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}
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/// Every signed-in server, rebuilt only when the saved list changes.
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var all: [MediaSource] {
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let json = settings.serversJson
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lock.lock()
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defer { lock.unlock() }
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if json != builtFrom {
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built = settings.servers.filter(\.signedIn).map(make)
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builtFrom = json
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}
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return built
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}
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/// Servers with at least one music library picked.
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private var sources: [MediaSource] { all.filter { $0.server.ready } }
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var signedIn: Bool { !all.isEmpty }
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/// The server a tagged key belongs to, and the key as that server knows it.
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private func route(_ key: String) -> (MediaSource, String)? {
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let list = all
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if let i = key.firstIndex(of: "~"), let s = list.first(where: { !$0.server.id.isEmpty && $0.server.id == key[..<i] }) {
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return (s, String(key[key.index(after: i)...]))
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}
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return list.first { $0.server.id.isEmpty }.map { ($0, key) }
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}
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private func routed(_ key: String) throws -> (MediaSource, String) {
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guard let r = route(key) else { throw NotSignedIn() }
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return r
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}
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/// Runs [f] on every server at once and joins the results in Settings order.
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/// One server being down doesn't hide the others; it only fails when they all do.
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private func pool<T: Sendable>(_ f: @escaping @Sendable (MediaSource) async throws -> [T]) async throws -> [T] {
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let list = sources
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guard !list.isEmpty else { throw NotSignedIn() }
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if list.count == 1 { return try await f(list[0]) }
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var results = [[T]?](repeating: nil, count: list.count)
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var failure: Error?
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await withTaskGroup(of: (Int, Result<[T], Error>).self) { g in
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for (i, s) in list.enumerated() {
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g.addTask { do { return (i, .success(try await f(s))) } catch { return (i, .failure(error)) } }
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}
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for await (i, r) in g {
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switch r {
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case .success(let v): results[i] = v
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case .failure(let e): failure = e
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}
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}
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}
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if results.allSatisfy({ $0 == nil }), let failure { throw failure }
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return results.compactMap { $0 }.flatMap { $0 }
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}
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private var many: Bool { sources.count > 1 }
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/// Name sorts come back sorted per server; put the joined list back in order.
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private func byName<T>(_ list: [T], _ sort: String, _ name: (T) -> String) -> [T] {
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guard many, sort.hasPrefix("titleSort") else { return list }
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let desc = sort.hasPrefix("titleSort:desc")
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return list.sorted { (name($0).localizedStandardCompare(name($1)) == .orderedAscending) != desc }
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}
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// ---- library ------------------------------------------------------------------
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func artists(sort: String = "titleSort") async throws -> [Artist] {
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byName(try await pool { s in try await s.artists(sort: sort).map { $0.tagged(s.server.id) } }, sort, \.sortTitle)
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}
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func albums(sort: String = "titleSort") async throws -> [Album] {
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byName(try await pool { s in try await s.albums(sort: sort).map { $0.tagged(s.server.id) } }, sort, \.title)
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}
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func recentlyAdded(count: Int = 20) async throws -> [Album] {
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try await pool { s in try await s.recentlyAdded(count: count).map { $0.tagged(s.server.id) } }
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}
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func recentlyPlayed(count: Int = 20) async throws -> [Album] {
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try await pool { s in try await s.recentlyPlayed(count: count).map { $0.tagged(s.server.id) } }
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}
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func recentlyAddedTracks(count: Int = 20) async throws -> [Track] {
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try await pool { s in try await s.recentlyAddedTracks(count: count).map { $0.tagged(s.server.id) } }
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}
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func randomAlbums(_ count: Int) async throws -> [Album] {
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Array(try await pool { s in try await s.randomAlbums(count).map { $0.tagged(s.server.id) } }.shuffled().prefix(count))
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}
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/// One page of every track, running on through each server in turn, and the total count.
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func tracksPage(start: Int, size: Int, sort: String = "titleSort") async throws -> ([Track], Int) {
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let list = sources
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guard !list.isEmpty else { throw NotSignedIn() }
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if list.count == 1 {
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let (page, total) = try await list[0].tracksPage(start: start, size: size, sort: sort)
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return (page.map { $0.tagged(list[0].server.id) }, total)
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}
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var out: [Track] = []
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var offset = 0, total = 0
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for s in list {
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let count = try await s.tracksPage(start: 0, size: 0, sort: sort).1
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let from = max(start + out.count - offset, 0)
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if out.count < size, from < count {
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out += try await s.tracksPage(start: from, size: size - out.count, sort: sort).0.map { $0.tagged(s.server.id) }
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}
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offset += count; total += count
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}
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return (out, total)
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}
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func randomTracks(_ count: Int) async throws -> [Track] {
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let each = count / max(sources.count, 1) + 1
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return Array(try await pool { s in try await s.randomTracks(each).map { $0.tagged(s.server.id) } }.shuffled().prefix(count))
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}
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func album(_ key: String) async throws -> Album? {
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let (s, k) = try routed(key)
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return try await s.album(k)?.tagged(s.server.id)
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}
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func albumTracks(_ key: String) async throws -> [Track] {
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let (s, k) = try routed(key)
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return try await s.albumTracks(k).map { $0.tagged(s.server.id) }
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}
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func artistAlbums(_ key: String) async throws -> [Album] {
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let (s, k) = try routed(key)
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return try await s.artistAlbums(k).map { $0.tagged(s.server.id) }
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}
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func artistTracks(_ key: String) async throws -> [Track] {
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let (s, k) = try routed(key)
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return try await s.artistTracks(k).map { $0.tagged(s.server.id) }
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}
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/// Title search on every server; used to give stem-only entries library metadata.
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func searchTracks(_ title: String) async throws -> [Track] {
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try await pool { s in try await s.searchTracks(title).map { $0.tagged(s.server.id) } }
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}
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/// Plex's own loudness analysis (what Plexamp draws its waveform from), in dB. Jellyfin has none.
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func loudness(_ trackKey: String, samples: Int) async throws -> [Float]? {
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let (s, k) = try routed(trackKey)
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return try await s.loudness(k, samples: samples)
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}
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func search(_ query: String) async throws -> SearchResults {
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let parts = try await pool { s in [try await s.search(query).tagged(s.server.id)] }
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return SearchResults(artists: parts.flatMap(\.artists), albums: parts.flatMap(\.albums),
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tracks: parts.flatMap(\.tracks), playlists: parts.flatMap(\.playlists))
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}
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// ---- playlists ----------------------------------------------------------------
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func playlists(sort: String = "titleSort") async throws -> [Playlist] {
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byName(try await pool { s in try await s.playlists(sort: sort).map { $0.tagged(s.server.id) } }, sort, \.title)
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}
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func playlistTracks(_ key: String) async throws -> [Track] {
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let (s, k) = try routed(key)
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return try await s.playlistTracks(k).map { $0.tagged(s.server.id) }
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}
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/// The keys that live on [s], untagged. A playlist can't hold another server's songs.
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private func keys(_ trackKeys: [String], on s: MediaSource) -> [String] {
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trackKeys.compactMap { k in route(k).flatMap { $0.0 === s ? $0.1 : nil } }
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}
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/// Made on the server of the first song; songs from other servers are left out.
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func createPlaylist(_ title: String, trackKeys: [String]) async throws -> Playlist? {
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guard let first = trackKeys.first else { return nil }
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let (s, _) = try routed(first)
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return try await s.createPlaylist(title, trackKeys: keys(trackKeys, on: s))?.tagged(s.server.id)
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}
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func addToPlaylist(_ key: String, trackKeys: [String]) async throws {
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let (s, k) = try routed(key)
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let own = keys(trackKeys, on: s)
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guard !own.isEmpty else { throw PlainError("Those songs are on a different server than this playlist") }
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try await s.addToPlaylist(k, trackKeys: own)
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}
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func removeFromPlaylist(_ key: String, playlistItemId: Int64) async throws {
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let (s, k) = try routed(key)
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try await s.removeFromPlaylist(k, playlistItemId: playlistItemId)
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}
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/// Moves an item to just after [afterItemId], or to the top when it's nil.
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func movePlaylistItem(_ key: String, playlistItemId: Int64, afterItemId: Int64?) async throws {
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let (s, k) = try routed(key)
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try await s.movePlaylistItem(k, playlistItemId: playlistItemId, afterItemId: afterItemId)
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}
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func renamePlaylist(_ key: String, title: String) async throws {
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let (s, k) = try routed(key)
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try await s.renamePlaylist(k, title: title)
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}
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func deletePlaylist(_ key: String) async throws {
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let (s, k) = try routed(key)
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try await s.deletePlaylist(k)
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}
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// ---- playback reporting ---------------------------------------------------------
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func scrobble(_ trackKey: String) async {
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guard let r = route(trackKey) else { return }
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let (s, k) = r
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await s.scrobble(k)
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}
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func timeline(_ track: Track, state: String, positionMs: Int64) async {
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guard let r = route(track.ratingKey) else { return }
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let (s, k) = r
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var t = track
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t.ratingKey = k
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await s.timeline(t, state: state, positionMs: positionMs)
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}
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// ---- URLs -----------------------------------------------------------------------
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func artUrl(_ thumb: String?, px: Int) -> URL? {
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guard let thumb, !thumb.isEmpty, let r = route(thumb) else { return nil }
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let (s, k) = r
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return s.artUrl(k, px: px)
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}
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func partUrl(_ partKey: String) -> URL? {
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guard let r = route(partKey) else { return nil }
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let (s, k) = r
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return s.partUrl(k)
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}
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// ---- sign-in helpers --------------------------------------------------------------
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/// A Plex client for plex.tv calls and for a server that isn't saved yet.
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func plexTv(_ url: String = "") -> PlexServer { PlexServer(http: http, settings: settings, server: MediaServer(url: url)) }
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func jellyfin(_ s: MediaServer) -> JellyfinClient { JellyfinClient(http: http, settings: settings, server: s) }
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}
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