Move error definitions to errors.js (#898)

src/renderer/lib/errors.js

@@ -1,15 +1,54 @@
+const ExtendableError = require('es6-error')
+
+/* Generic errors */
+
+class CastingError extends ExtendableError {}
+class PlaybackError extends ExtendableError {}
+class SoundError extends ExtendableError {}
+class TorrentError extends ExtendableError {}
+
+/* Playback */
+
+class UnplayableTorrentError extends PlaybackError {
+  constructor () { super('Can\'t play any files in torrent') }
+}
+
+class UnplayableFileError extends PlaybackError {
+  constructor () { super('Can\'t play that file') }
+}
+
+class PlaybackTimedOutError extends PlaybackError {
+  constructor () { super('Playback timed out. Try again.') }
+}
+
+/* Sound */
+
+class InvalidSoundNameError extends SoundError {
+  constructor (name) { super(`Invalid sound name: ${name}`) }
+}
+
+/* Torrent */
+
+class TorrentKeyNotFoundError extends TorrentError {
+  constructor (torrentKey) { super(`Can't resolve torrent key ${torrentKey}`) }
+}
+
+class InvalidTorrentError extends TorrentError {}
+
+/* Miscellaneous */
+
+class IllegalArgumentError extends ExtendableError {}
+
 module.exports = {
+  CastingError,
+  PlaybackError,
+  SoundError,
+  TorrentError,
   UnplayableTorrentError,
-  UnplayableFileError
+  UnplayableFileError,
+  PlaybackTimedOutError,
+  InvalidSoundNameError,
+  TorrentKeyNotFoundError,
+  InvalidTorrentError,
+  IllegalArgumentError
 }
-
-function UnplayableTorrentError () {
-  this.message = 'Can\'t play any files in torrent'
-}
-
-function UnplayableFileError () {
-  this.message = 'Can\'t play that file'
-}
-
-UnplayableTorrentError.prototype = Error
-UnplayableFileError.prototype = Error