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							- "use strict";
 
- const async = require("async");
 
- const hooks = require("./hooks");
 
- const queueSongs = require("./queueSongs");
 
- // const moduleManager = require("../../index");
 
- const db = require("../db");
 
- const songs = require("../songs");
 
- const cache = require("../cache");
 
- const utils = require("../utils");
 
- const activities = require("../activities");
 
- // const logger = moduleManager.modules["logger"];
 
- cache.runJob("SUB", {
 
-     channel: "song.removed",
 
-     cb: (songId) => {
 
-         utils.runJob("EMIT_TO_ROOM", {
 
-             room: "admin.songs",
 
-             args: ["event:admin.song.removed", songId],
 
-         });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.added",
 
-     cb: async (songId) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         songModel.findOne({ _id: songId }, (err, song) => {
 
-             utils.runJob("EMIT_TO_ROOM", {
 
-                 room: "admin.songs",
 
-                 args: ["event:admin.song.added", song],
 
-             });
 
-         });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.updated",
 
-     cb: async (songId) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         songModel.findOne({ _id: songId }, (err, song) => {
 
-             utils.runJob("EMIT_TO_ROOM", {
 
-                 room: "admin.songs",
 
-                 args: ["event:admin.song.updated", song],
 
-             });
 
-         });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.like",
 
-     cb: (data) => {
 
-         utils.runJob("EMIT_TO_ROOM", {
 
-             room: `song.${data.songId}`,
 
-             args: [
 
-                 "event:song.like",
 
-                 {
 
-                     songId: data.songId,
 
-                     likes: data.likes,
 
-                     dislikes: data.dislikes,
 
-                 },
 
-             ],
 
-         });
 
-         utils
 
-             .runJob("SOCKETS_FROM_USER", { userId: data.userId })
 
-             .then((response) => {
 
-                 response.sockets.forEach((socket) => {
 
-                     socket.emit("event:song.newRatings", {
 
-                         songId: data.songId,
 
-                         liked: true,
 
-                         disliked: false,
 
-                     });
 
-                 });
 
-             });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.dislike",
 
-     cb: (data) => {
 
-         utils.runJob("EMIT_TO_ROOM", {
 
-             room: `song.${data.songId}`,
 
-             args: [
 
-                 "event:song.dislike",
 
-                 {
 
-                     songId: data.songId,
 
-                     likes: data.likes,
 
-                     dislikes: data.dislikes,
 
-                 },
 
-             ],
 
-         });
 
-         utils
 
-             .runJob("SOCKETS_FROM_USER", { userId: data.userId })
 
-             .then((response) => {
 
-                 response.sockets.forEach((socket) => {
 
-                     socket.emit("event:song.newRatings", {
 
-                         songId: data.songId,
 
-                         liked: false,
 
-                         disliked: true,
 
-                     });
 
-                 });
 
-             });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.unlike",
 
-     cb: (data) => {
 
-         utils.runJob("EMIT_TO_ROOM", {
 
-             room: `song.${data.songId}`,
 
-             args: [
 
-                 "event:song.unlike",
 
-                 {
 
-                     songId: data.songId,
 
-                     likes: data.likes,
 
-                     dislikes: data.dislikes,
 
-                 },
 
-             ],
 
-         });
 
-         utils
 
-             .runJob("SOCKETS_FROM_USER", { userId: data.userId })
 
-             .then((response) => {
 
-                 response.sockets.forEach((socket) => {
 
-                     socket.emit("event:song.newRatings", {
 
-                         songId: data.songId,
 
-                         liked: false,
 
-                         disliked: false,
 
-                     });
 
-                 });
 
-             });
 
-     },
 
- });
 
- cache.runJob("SUB", {
 
-     channel: "song.undislike",
 
-     cb: (data) => {
 
-         utils.runJob("EMIT_TO_ROOM", {
 
-             room: `song.${data.songId}`,
 
-             args: [
 
-                 "event:song.undislike",
 
-                 {
 
-                     songId: data.songId,
 
-                     likes: data.likes,
 
-                     dislikes: data.dislikes,
 
-                 },
 
-             ],
 
-         });
 
-         utils
 
-             .runJob("SOCKETS_FROM_USER", { userId: data.userId })
 
-             .then((response) => {
 
-                 response.sockets.forEach((socket) => {
 
-                     socket.emit("event:song.newRatings", {
 
-                         songId: data.songId,
 
-                         liked: false,
 
-                         disliked: false,
 
-                     });
 
-                 });
 
-             });
 
-     },
 
- });
 
- module.exports = {
 
-     /**
 
-      * Returns the length of the songs list
 
-      *
 
-      * @param session
 
-      * @param cb
 
-      */
 
-     length: hooks.adminRequired(async (session, cb) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.countDocuments({}, next);
 
-                 },
 
-             ],
 
-             async (err, count) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_LENGTH",
 
-                         `Failed to get length from songs. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 console.log(
 
-                     "SUCCESS",
 
-                     "SONGS_LENGTH",
 
-                     `Got length from songs successfully.`
 
-                 );
 
-                 cb(count);
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Gets a set of songs
 
-      *
 
-      * @param session
 
-      * @param set - the set number to return
 
-      * @param cb
 
-      */
 
-     getSet: hooks.adminRequired(async (session, set, cb) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel
 
-                         .find({})
 
-                         .skip(15 * (set - 1))
 
-                         .limit(15)
 
-                         .exec(next);
 
-                 },
 
-             ],
 
-             async (err, songs) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_GET_SET",
 
-                         `Failed to get set from songs. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 console.log(
 
-                     "SUCCESS",
 
-                     "SONGS_GET_SET",
 
-                     `Got set from songs successfully.`
 
-                 );
 
-                 cb(songs);
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Gets a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     getSong: hooks.adminRequired((session, songId, cb) => {
 
-         console.log(songId);
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     song.getSong(songId, next);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_GET_SONG",
 
-                         `Failed to get song ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 } else {
 
-                     console.log(
 
-                         "SUCCESS",
 
-                         "SONGS_GET_SONG",
 
-                         `Got song ${songId} successfully.`
 
-                     );
 
-                     cb({ status: "success", data: song });
 
-                 }
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Obtains basic metadata of a song in order to format an activity
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     getSongForActivity: (session, songId, cb) => {
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songs
 
-                         .runJob("GET_SONG_FROM_ID", { songId })
 
-                         .then((responsesong) => next(null, response.song))
 
-                         .catch(next);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_GET_SONG_FOR_ACTIVITY",
 
-                         `Failed to obtain metadata of song ${songId} for activity formatting. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 } else {
 
-                     if (song) {
 
-                         console.log(
 
-                             "SUCCESS",
 
-                             "SONGS_GET_SONG_FOR_ACTIVITY",
 
-                             `Obtained metadata of song ${songId} for activity formatting successfully.`
 
-                         );
 
-                         cb({
 
-                             status: "success",
 
-                             data: {
 
-                                 title: song.title,
 
-                                 thumbnail: song.thumbnail,
 
-                             },
 
-                         });
 
-                     } else {
 
-                         console.log(
 
-                             "ERROR",
 
-                             "SONGS_GET_SONG_FOR_ACTIVITY",
 
-                             `Song ${songId} does not exist so failed to obtain for activity formatting.`
 
-                         );
 
-                         cb({ status: "failure" });
 
-                     }
 
-                 }
 
-             }
 
-         );
 
-     },
 
-     /**
 
-      * Updates a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param song - the updated song object
 
-      * @param cb
 
-      */
 
-     update: hooks.adminRequired(async (session, songId, song, cb) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.updateOne(
 
-                         { _id: songId },
 
-                         song,
 
-                         { runValidators: true },
 
-                         next
 
-                     );
 
-                 },
 
-                 (res, next) => {
 
-                     songs
 
-                         .runJob("UPDATE_SONG", { songId })
 
-                         .then((song) => next(null, song))
 
-                         .catch(next);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_UPDATE",
 
-                         `Failed to update song "${songId}". "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 console.log(
 
-                     "SUCCESS",
 
-                     "SONGS_UPDATE",
 
-                     `Successfully updated song "${songId}".`
 
-                 );
 
-                 cache.runJob("PUB", {
 
-                     channel: "song.updated",
 
-                     value: song.songId,
 
-                 });
 
-                 cb({
 
-                     status: "success",
 
-                     message: "Song has been successfully updated",
 
-                     data: song,
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Removes a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     remove: hooks.adminRequired(async (session, songId, cb) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.deleteOne({ _id: songId }, next);
 
-                 },
 
-                 (res, next) => {
 
-                     //TODO Check if res gets returned from above
 
-                     cache
 
-                         .runJob("HDEL", { table: "songs", key: songId })
 
-                         .then(() => next())
 
-                         .catch(next);
 
-                 },
 
-             ],
 
-             async (err) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_UPDATE",
 
-                         `Failed to remove song "${songId}". "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 console.log(
 
-                     "SUCCESS",
 
-                     "SONGS_UPDATE",
 
-                     `Successfully remove song "${songId}".`
 
-                 );
 
-                 cache.runJob("PUB", { channel: "song.removed", value: songId });
 
-                 cb({
 
-                     status: "success",
 
-                     message: "Song has been successfully updated",
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Adds a song
 
-      *
 
-      * @param session
 
-      * @param song - the song object
 
-      * @param cb
 
-      */
 
-     add: hooks.adminRequired(async (session, song, cb) => {
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId: song.songId }, next);
 
-                 },
 
-                 (existingSong, next) => {
 
-                     if (existingSong)
 
-                         return next("Song is already in rotation.");
 
-                     next();
 
-                 },
 
-                 (next) => {
 
-                     const newSong = new songModel(song);
 
-                     newSong.acceptedBy = session.userId;
 
-                     newSong.acceptedAt = Date.now();
 
-                     newSong.save(next);
 
-                 },
 
-                 (res, next) => {
 
-                     queueSongs.remove(session, song._id, () => {
 
-                         next();
 
-                     });
 
-                 },
 
-             ],
 
-             async (err) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_ADD",
 
-                         `User "${session.userId}" failed to add song. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 console.log(
 
-                     "SUCCESS",
 
-                     "SONGS_ADD",
 
-                     `User "${session.userId}" successfully added song "${song.songId}".`
 
-                 );
 
-                 cache.runJob("PUB", {
 
-                     channel: "song.added",
 
-                     value: song.songId,
 
-                 });
 
-                 cb({
 
-                     status: "success",
 
-                     message: "Song has been moved from the queue successfully.",
 
-                 });
 
-             }
 
-         );
 
-         //TODO Check if video is in queue and Add the song to the appropriate stations
 
-     }),
 
-     /**
 
-      * Likes a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     like: hooks.loginRequired(async (session, songId, cb) => {
 
-         const userModel = await db.runJob("GET_MODEL", { modelName: "user" });
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId }, next);
 
-                 },
 
-                 (song, next) => {
 
-                     if (!song) return next("No song found with that id.");
 
-                     next(null, song);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_LIKE",
 
-                         `User "${session.userId}" failed to like song ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 let oldSongId = songId;
 
-                 songId = song._id;
 
-                 userModel.findOne({ _id: session.userId }, (err, user) => {
 
-                     if (user.liked.indexOf(songId) !== -1)
 
-                         return cb({
 
-                             status: "failure",
 
-                             message: "You have already liked this song.",
 
-                         });
 
-                     userModel.updateOne(
 
-                         { _id: session.userId },
 
-                         {
 
-                             $push: { liked: songId },
 
-                             $pull: { disliked: songId },
 
-                         },
 
-                         (err) => {
 
-                             if (!err) {
 
-                                 userModel.countDocuments(
 
-                                     { liked: songId },
 
-                                     (err, likes) => {
 
-                                         if (err)
 
-                                             return cb({
 
-                                                 status: "failure",
 
-                                                 message:
 
-                                                     "Something went wrong while liking this song.",
 
-                                             });
 
-                                         userModel.countDocuments(
 
-                                             { disliked: songId },
 
-                                             (err, dislikes) => {
 
-                                                 if (err)
 
-                                                     return cb({
 
-                                                         status: "failure",
 
-                                                         message:
 
-                                                             "Something went wrong while liking this song.",
 
-                                                     });
 
-                                                 songModel.update(
 
-                                                     { _id: songId },
 
-                                                     {
 
-                                                         $set: {
 
-                                                             likes: likes,
 
-                                                             dislikes: dislikes,
 
-                                                         },
 
-                                                     },
 
-                                                     (err) => {
 
-                                                         if (err)
 
-                                                             return cb({
 
-                                                                 status:
 
-                                                                     "failure",
 
-                                                                 message:
 
-                                                                     "Something went wrong while liking this song.",
 
-                                                             });
 
-                                                         songs.runJob(
 
-                                                             "UPDATE_SONG",
 
-                                                             { songId }
 
-                                                         );
 
-                                                         cache.runJob("PUB", {
 
-                                                             channel:
 
-                                                                 "song.like",
 
-                                                             value: JSON.stringify(
 
-                                                                 {
 
-                                                                     songId: oldSongId,
 
-                                                                     userId:
 
-                                                                         session.userId,
 
-                                                                     likes: likes,
 
-                                                                     dislikes: dislikes,
 
-                                                                 }
 
-                                                             ),
 
-                                                         });
 
-                                                         activities.runJob(
 
-                                                             "ADD_ACTIVITY",
 
-                                                             {
 
-                                                                 userId:
 
-                                                                     session.userId,
 
-                                                                 activityType:
 
-                                                                     "liked_song",
 
-                                                                 payload: [
 
-                                                                     songId,
 
-                                                                 ],
 
-                                                             }
 
-                                                         );
 
-                                                         return cb({
 
-                                                             status: "success",
 
-                                                             message:
 
-                                                                 "You have successfully liked this song.",
 
-                                                         });
 
-                                                     }
 
-                                                 );
 
-                                             }
 
-                                         );
 
-                                     }
 
-                                 );
 
-                             } else
 
-                                 return cb({
 
-                                     status: "failure",
 
-                                     message:
 
-                                         "Something went wrong while liking this song.",
 
-                                 });
 
-                         }
 
-                     );
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Dislikes a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     dislike: hooks.loginRequired(async (session, songId, cb) => {
 
-         const userModel = await db.runJob("GET_MODEL", { modelName: "user" });
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId }, next);
 
-                 },
 
-                 (song, next) => {
 
-                     if (!song) return next("No song found with that id.");
 
-                     next(null, song);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_DISLIKE",
 
-                         `User "${session.userId}" failed to like song ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 let oldSongId = songId;
 
-                 songId = song._id;
 
-                 userModel.findOne({ _id: session.userId }, (err, user) => {
 
-                     if (user.disliked.indexOf(songId) !== -1)
 
-                         return cb({
 
-                             status: "failure",
 
-                             message: "You have already disliked this song.",
 
-                         });
 
-                     userModel.updateOne(
 
-                         { _id: session.userId },
 
-                         {
 
-                             $push: { disliked: songId },
 
-                             $pull: { liked: songId },
 
-                         },
 
-                         (err) => {
 
-                             if (!err) {
 
-                                 userModel.countDocuments(
 
-                                     { liked: songId },
 
-                                     (err, likes) => {
 
-                                         if (err)
 
-                                             return cb({
 
-                                                 status: "failure",
 
-                                                 message:
 
-                                                     "Something went wrong while disliking this song.",
 
-                                             });
 
-                                         userModel.countDocuments(
 
-                                             { disliked: songId },
 
-                                             (err, dislikes) => {
 
-                                                 if (err)
 
-                                                     return cb({
 
-                                                         status: "failure",
 
-                                                         message:
 
-                                                             "Something went wrong while disliking this song.",
 
-                                                     });
 
-                                                 songModel.update(
 
-                                                     { _id: songId },
 
-                                                     {
 
-                                                         $set: {
 
-                                                             likes: likes,
 
-                                                             dislikes: dislikes,
 
-                                                         },
 
-                                                     },
 
-                                                     (err, res) => {
 
-                                                         if (err)
 
-                                                             return cb({
 
-                                                                 status:
 
-                                                                     "failure",
 
-                                                                 message:
 
-                                                                     "Something went wrong while disliking this song.",
 
-                                                             });
 
-                                                         songs.runJob(
 
-                                                             "UPDATE_SONG",
 
-                                                             { songId }
 
-                                                         );
 
-                                                         cache.runJob("PUB", {
 
-                                                             channel:
 
-                                                                 "song.dislike",
 
-                                                             value: JSON.stringify(
 
-                                                                 {
 
-                                                                     songId: oldSongId,
 
-                                                                     userId:
 
-                                                                         session.userId,
 
-                                                                     likes: likes,
 
-                                                                     dislikes: dislikes,
 
-                                                                 }
 
-                                                             ),
 
-                                                         });
 
-                                                         return cb({
 
-                                                             status: "success",
 
-                                                             message:
 
-                                                                 "You have successfully disliked this song.",
 
-                                                         });
 
-                                                     }
 
-                                                 );
 
-                                             }
 
-                                         );
 
-                                     }
 
-                                 );
 
-                             } else
 
-                                 return cb({
 
-                                     status: "failure",
 
-                                     message:
 
-                                         "Something went wrong while disliking this song.",
 
-                                 });
 
-                         }
 
-                     );
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Undislikes a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     undislike: hooks.loginRequired(async (session, songId, cb) => {
 
-         const userModel = await db.runJob("GET_MODEL", { modelName: "user" });
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId }, next);
 
-                 },
 
-                 (song, next) => {
 
-                     if (!song) return next("No song found with that id.");
 
-                     next(null, song);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_UNDISLIKE",
 
-                         `User "${session.userId}" failed to like song ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 let oldSongId = songId;
 
-                 songId = song._id;
 
-                 userModel.findOne({ _id: session.userId }, (err, user) => {
 
-                     if (user.disliked.indexOf(songId) === -1)
 
-                         return cb({
 
-                             status: "failure",
 
-                             message: "You have not disliked this song.",
 
-                         });
 
-                     userModel.updateOne(
 
-                         { _id: session.userId },
 
-                         { $pull: { liked: songId, disliked: songId } },
 
-                         (err) => {
 
-                             if (!err) {
 
-                                 userModel.countDocuments(
 
-                                     { liked: songId },
 
-                                     (err, likes) => {
 
-                                         if (err)
 
-                                             return cb({
 
-                                                 status: "failure",
 
-                                                 message:
 
-                                                     "Something went wrong while undisliking this song.",
 
-                                             });
 
-                                         userModel.countDocuments(
 
-                                             { disliked: songId },
 
-                                             (err, dislikes) => {
 
-                                                 if (err)
 
-                                                     return cb({
 
-                                                         status: "failure",
 
-                                                         message:
 
-                                                             "Something went wrong while undisliking this song.",
 
-                                                     });
 
-                                                 songModel.update(
 
-                                                     { _id: songId },
 
-                                                     {
 
-                                                         $set: {
 
-                                                             likes: likes,
 
-                                                             dislikes: dislikes,
 
-                                                         },
 
-                                                     },
 
-                                                     (err) => {
 
-                                                         if (err)
 
-                                                             return cb({
 
-                                                                 status:
 
-                                                                     "failure",
 
-                                                                 message:
 
-                                                                     "Something went wrong while undisliking this song.",
 
-                                                             });
 
-                                                         songs.runJob(
 
-                                                             "UPDATE_SONG",
 
-                                                             { songId }
 
-                                                         );
 
-                                                         cache.runJob("PUB", {
 
-                                                             channel:
 
-                                                                 "song.undislike",
 
-                                                             value: JSON.stringify(
 
-                                                                 {
 
-                                                                     songId: oldSongId,
 
-                                                                     userId:
 
-                                                                         session.userId,
 
-                                                                     likes: likes,
 
-                                                                     dislikes: dislikes,
 
-                                                                 }
 
-                                                             ),
 
-                                                         });
 
-                                                         return cb({
 
-                                                             status: "success",
 
-                                                             message:
 
-                                                                 "You have successfully undisliked this song.",
 
-                                                         });
 
-                                                     }
 
-                                                 );
 
-                                             }
 
-                                         );
 
-                                     }
 
-                                 );
 
-                             } else
 
-                                 return cb({
 
-                                     status: "failure",
 
-                                     message:
 
-                                         "Something went wrong while undisliking this song.",
 
-                                 });
 
-                         }
 
-                     );
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Unlikes a song
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     unlike: hooks.loginRequired(async (session, songId, cb) => {
 
-         const userModel = await db.runJob("GET_MODEL", { modelName: "user" });
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId }, next);
 
-                 },
 
-                 (song, next) => {
 
-                     if (!song) return next("No song found with that id.");
 
-                     next(null, song);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_UNLIKE",
 
-                         `User "${session.userId}" failed to like song ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 let oldSongId = songId;
 
-                 songId = song._id;
 
-                 userModel.findOne({ _id: session.userId }, (err, user) => {
 
-                     if (user.liked.indexOf(songId) === -1)
 
-                         return cb({
 
-                             status: "failure",
 
-                             message: "You have not liked this song.",
 
-                         });
 
-                     userModel.updateOne(
 
-                         { _id: session.userId },
 
-                         { $pull: { liked: songId, disliked: songId } },
 
-                         (err) => {
 
-                             if (!err) {
 
-                                 userModel.countDocuments(
 
-                                     { liked: songId },
 
-                                     (err, likes) => {
 
-                                         if (err)
 
-                                             return cb({
 
-                                                 status: "failure",
 
-                                                 message:
 
-                                                     "Something went wrong while unliking this song.",
 
-                                             });
 
-                                         userModel.countDocuments(
 
-                                             { disliked: songId },
 
-                                             (err, dislikes) => {
 
-                                                 if (err)
 
-                                                     return cb({
 
-                                                         status: "failure",
 
-                                                         message:
 
-                                                             "Something went wrong while undiking this song.",
 
-                                                     });
 
-                                                 songModel.updateOne(
 
-                                                     { _id: songId },
 
-                                                     {
 
-                                                         $set: {
 
-                                                             likes: likes,
 
-                                                             dislikes: dislikes,
 
-                                                         },
 
-                                                     },
 
-                                                     (err) => {
 
-                                                         if (err)
 
-                                                             return cb({
 
-                                                                 status:
 
-                                                                     "failure",
 
-                                                                 message:
 
-                                                                     "Something went wrong while unliking this song.",
 
-                                                             });
 
-                                                         songs.runJob(
 
-                                                             "UPDATE_SONG",
 
-                                                             { songId }
 
-                                                         );
 
-                                                         cache.runJob("PUB", {
 
-                                                             channel:
 
-                                                                 "song.unlike",
 
-                                                             value: JSON.stringify(
 
-                                                                 {
 
-                                                                     songId: oldSongId,
 
-                                                                     userId:
 
-                                                                         session.userId,
 
-                                                                     likes: likes,
 
-                                                                     dislikes: dislikes,
 
-                                                                 }
 
-                                                             ),
 
-                                                         });
 
-                                                         return cb({
 
-                                                             status: "success",
 
-                                                             message:
 
-                                                                 "You have successfully unliked this song.",
 
-                                                         });
 
-                                                     }
 
-                                                 );
 
-                                             }
 
-                                         );
 
-                                     }
 
-                                 );
 
-                             } else
 
-                                 return cb({
 
-                                     status: "failure",
 
-                                     message:
 
-                                         "Something went wrong while unliking this song.",
 
-                                 });
 
-                         }
 
-                     );
 
-                 });
 
-             }
 
-         );
 
-     }),
 
-     /**
 
-      * Gets user's own song ratings
 
-      *
 
-      * @param session
 
-      * @param songId - the song id
 
-      * @param cb
 
-      */
 
-     getOwnSongRatings: hooks.loginRequired(async (session, songId, cb) => {
 
-         const userModel = await db.runJob("GET_MODEL", { modelName: "user" });
 
-         const songModel = await db.runJob("GET_MODEL", { modelName: "song" });
 
-         async.waterfall(
 
-             [
 
-                 (next) => {
 
-                     songModel.findOne({ songId }, next);
 
-                 },
 
-                 (song, next) => {
 
-                     if (!song) return next("No song found with that id.");
 
-                     next(null, song);
 
-                 },
 
-             ],
 
-             async (err, song) => {
 
-                 if (err) {
 
-                     err = await utils.runJob("GET_ERROR", { error: err });
 
-                     console.log(
 
-                         "ERROR",
 
-                         "SONGS_GET_OWN_RATINGS",
 
-                         `User "${session.userId}" failed to get ratings for ${songId}. "${err}"`
 
-                     );
 
-                     return cb({ status: "failure", message: err });
 
-                 }
 
-                 let newSongId = song._id;
 
-                 userModel.findOne(
 
-                     { _id: session.userId },
 
-                     async (err, user) => {
 
-                         if (!err && user) {
 
-                             return cb({
 
-                                 status: "success",
 
-                                 songId: songId,
 
-                                 liked: user.liked.indexOf(newSongId) !== -1,
 
-                                 disliked:
 
-                                     user.disliked.indexOf(newSongId) !== -1,
 
-                             });
 
-                         } else {
 
-                             return cb({
 
-                                 status: "failure",
 
-                                 message: await utils.runJob("GET_ERROR", {
 
-                                     error: err,
 
-                                 }),
 
-                             });
 
-                         }
 
-                     }
 
-                 );
 
-             }
 
-         );
 
-     }),
 
- };
 
 
  |