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Scrobbler.js
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"use strict";
/// <reference path="./definitions/typescript-node-definitions/winston.d.ts"/>
/// <reference path="./definitions/DefinitelyTyped/underscore/underscore.d.ts"/>
exports.__esModule = true;
var _ = require("underscore");
var winston = require("winston");
// Constants
var LAST_UPDATE_TIMEOUT = 60 * 1000; // Amount of time failures can occur before the song that was playing is scrobbled
var MIN_SCROBBLE_TIME = 35 * 1000; // The minimum time a song has to play before it can be scrobbled
var ScrobblerStationData = (function () {
function ScrobblerStationData(stationName) {
this.stationName = stationName,
this.nowPlayingSong = { Artist: null, Track: null };
this.lastNowPlayingSong = null;
this.lastScrobbledSong = null;
this.lastUpdatedTime = null;
this.lastPostedNowPlayingTime = null;
}
return ScrobblerStationData;
}());
;
var Scrobbler = (function () {
function Scrobbler(lastFmDao, userDao, stationDao, skipPostNowPlayingTime) {
this.lastFmDao = lastFmDao;
this.userDao = userDao;
this.stationDao = stationDao;
this.skipPostNowPlayingTime = skipPostNowPlayingTime;
this.stationData = {};
}
Scrobbler.prototype.scrapeAndScrobble = function (scraper, station, users, timestamp) {
var _this = this;
timestamp = timestamp || new Date().getTime();
if (!scraper) {
winston.error("Attempted to process invalid scraper:", { scraper: scraper, station: station });
return;
}
if (!station || !station.StationName) {
winston.error("Attempted to process invalid station:", station);
return;
}
var stationName = station.StationName;
var stationData = this.stationData[stationName];
if (!stationData) {
winston.info("New station found, initializing:", stationName);
stationData = new ScrobblerStationData(stationName);
this.stationData[stationName] = stationData;
}
var cb = function (err, newNowPlayingSong, justScrobbledSong) {
if (err) {
winston.error("Error scraping " + stationName + ": " + err);
if (_this.lastUpdatedTooLongAgo(stationData, timestamp)) {
_this.scrobbleNowPlayingIfValid(stationData, null, station, users);
stationData.nowPlayingSong = { Artist: null, Track: null, StartTime: timestamp };
stationData.lastUpdatedTime = null;
}
return;
}
stationData.lastUpdatedTime = timestamp;
// justScrobbledSong should be set if the scraper might not be able to figure out what is currently playing
if (justScrobbledSong) {
justScrobbledSong.StartTime = new Date().getTime();
_this.scrobbleNowPlayingIfValid(stationData, justScrobbledSong, station, users);
// If both justScrobbledSong and newNowPlayingSong are set, only update now playing with
// newNowPlayingSong, don't ever scrobble that
if (newNowPlayingSong) {
stationData.nowPlayingSong = {
Artist: newNowPlayingSong.Artist,
Track: newNowPlayingSong.Track,
StartTime: timestamp
};
_this.postNowPlayingIfValid(stationData, station, users);
}
}
else {
if (!newNowPlayingSong || !stationData.nowPlayingSong ||
newNowPlayingSong.Artist != stationData.nowPlayingSong.Artist ||
newNowPlayingSong.Track != stationData.nowPlayingSong.Track) {
_this.scrobbleNowPlayingIfValid(stationData, null, station, users);
stationData.nowPlayingSong = {
Artist: newNowPlayingSong.Artist,
Track: newNowPlayingSong.Track,
StartTime: timestamp
};
}
_this.postNowPlayingIfValid(stationData, station, users);
}
};
scraper.fetchAndParse(cb, station.ScraperParam);
};
Scrobbler.prototype.lastUpdatedTooLongAgo = function (stationData, timestamp) {
return stationData.lastUpdatedTime && (stationData.lastUpdatedTime - timestamp < LAST_UPDATE_TIMEOUT);
};
Scrobbler.prototype.scrobbleNowPlayingIfValid = function (stationData, songToScrobble, station, users) {
var _this = this;
if (!songToScrobble) {
songToScrobble = stationData.nowPlayingSong;
// If we are scrobbling the now playing song, check play time
if (!songToScrobble.StartTime || !stationData.lastUpdatedTime ||
stationData.lastUpdatedTime - songToScrobble.StartTime <= MIN_SCROBBLE_TIME) {
return;
}
}
// Check song details
if (!(songToScrobble && songToScrobble.Artist && songToScrobble.Track)) {
return;
}
// Make sure it's not the same as the one we scrobbled last
if (songToScrobble != null && stationData.lastScrobbledSong != null
&& songToScrobble.Artist == stationData.lastScrobbledSong.Artist
&& songToScrobble.Track == stationData.lastScrobbledSong.Track) {
return;
}
stationData.lastScrobbledSong = { Artist: songToScrobble.Artist, Track: songToScrobble.Track };
if (station.Session) {
this.lastFmDao.scrobble(songToScrobble, station.StationName, station.Session);
}
_.each(users, function (user) {
if (user) {
_this.lastFmDao.scrobble(songToScrobble, user.UserName, user.Session);
_this.userDao.incrementUserScrobble(user.UserName, station.StationName, function (err, status) {
if (err) {
winston.info("Error incrementing scrobble count for user " + user.UserName + " and station " +
station.StationName + ":", err);
}
else {
winston.info("Incremented scrobble count for user " + user.UserName + " and station " +
station.StationName);
}
});
}
});
if (this.stationDao) {
this.stationDao.updateStationLastPlayedSong(station.StationName, songToScrobble, function (err) {
if (err) {
winston.error("Error updating " + station.StationName + " last played song", songToScrobble);
}
});
}
};
Scrobbler.prototype.postNowPlayingIfValid = function (stationData, station, users) {
var _this = this;
if (!(stationData.nowPlayingSong)) {
return;
}
// Make sure it's not the same as the one we posted last, unless it was posted a long time ago
if (stationData.lastNowPlayingSong != null
&& stationData.nowPlayingSong.Artist == stationData.lastNowPlayingSong.Artist
&& stationData.nowPlayingSong.Track == stationData.lastNowPlayingSong.Track) {
winston.info("Found same song for station " + station.StationName + ": " + stationData.nowPlayingSong.Artist + " - " + stationData.nowPlayingSong.Track);
if (stationData.lastPostedNowPlayingTime != null
&& stationData.lastPostedNowPlayingTime > (new Date().getTime() - (this.skipPostNowPlayingTime * 1000))) {
winston.info("Same song was already posted recently, skipping");
return;
}
}
if (this.stationDao) {
this.stationDao.updateStationNowPlayingSong(station.StationName, stationData.nowPlayingSong, function (err) {
if (err) {
winston.error("Error updating " + station.StationName + " now playing song", stationData.nowPlayingSong);
}
});
}
if (!stationData.nowPlayingSong.Artist || !stationData.nowPlayingSong.Track) {
return;
}
if (station.Session) {
this.lastFmDao.postNowPlaying(stationData.nowPlayingSong, station.StationName, station.Session);
stationData.lastPostedNowPlayingTime = new Date().getTime();
stationData.lastNowPlayingSong = stationData.nowPlayingSong;
}
_.each(users, function (user) {
if (user) {
_this.lastFmDao.postNowPlaying(stationData.nowPlayingSong, user.UserName, user.Session);
}
});
};
return Scrobbler;
}());
exports.Scrobbler = Scrobbler;
//# sourceMappingURL=Scrobbler.js.map