-
Notifications
You must be signed in to change notification settings - Fork 0
/
SmartSpot.js
243 lines (226 loc) · 8.12 KB
/
SmartSpot.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/**
* Taps into the Spotify API to create a playlist with top songs from artists most like a certain artist.
* @param {string} clientId the client ID code given to the user by Spotify.
* @param {string} clientSecret the client secret code given to the user by Spotify.
* @param {string} redirectUri a Redirect URI that has been white-listed by Spotify.
* @constructor creates a SmartSpot that can access the Spotify API.
*/
function SmartSpot(clientId, clientSecret, redirectUri)
{
var SpotifyWebApi = require('spotify-web-api-node');
var querystring = require("querystring");
var cookieParser = require('cookie-parser');
var request = require('request');
var stateKey = 'spotify_auth_state';
var spotifyApi = new SpotifyWebApi({
clientId:clientId,
clientSecret:clientSecret,
redirectUri:redirectUri
});
/**
* Generates a random string containing numbers and letters
* @param {number} length The length of the string
* @return {string} The generated string
*/
var generateRandomString = function(length)
{
var text = '';
var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
for (var i = 0; i < length; i++)
{
text += possible.charAt(Math.floor(Math.random() * possible.length));
}
return text;
};
this.login = function(req, res)
{
var state = generateRandomString(16);
res.cookie(stateKey, state);
var scopes = ['playlist-modify-private', 'playlist-modify-public', 'playlist-read-private'];
var authorizeURL = spotifyApi.createAuthorizeURL(scopes, state);
//console.log(authorizeURL);
res.redirect(authorizeURL);
};
this.callback = function(req, res)
{
var code = req.query.code || null;
var state = req.query.state || null;
var storedState = req.cookies ? req.cookies[stateKey] : null;
if (state === null || state !== storedState)
{
res.redirect('/#' +
querystring.stringify({
error:'state_mismatch'
}));
}
else
{
res.clearCookie(stateKey);
spotifyApi.authorizationCodeGrant(code)
.then(function(data)
{
spotifyApi.setAccessToken(data.body['access_token']);
spotifyApi.setRefreshToken(data.body['refresh_token']);
res.redirect('/callback.html#' +
querystring.stringify({
access_token:spotifyApi.getAccessToken(),
refresh_token:spotifyApi.getRefreshToken()
}));
}, function(err)
{
console.error(err);
res.redirect('/#' +
querystring.stringify({
error:'invalid_token'
}));
});
}
};
this.getRefreshToken = function(req, res)
{
spotifyApi.refreshAccessToken()
.then(function(data)
{
res.send({
'access_token':spotifyApi.getAccessToken()
});
}, function(err)
{
console.log(err);
});
};
/**
* Gets the artist ID that most closely matches the given artist name.
* @param {string} name the name of the artist to search for.
* @param {function} callback the callback to send the Json response to.
*/
this.getArtistID = function(name, callback)
{
spotifyApi.searchArtists(name)
.then(function(data)
{
//console.log('Search artists for ' + name, data.body);
var closestArtist = data.body.artists.items[0];
//console.log(closestArtist);
//console.log('Closest artist: ' + closestArtist.name + ' with ID: ' + closestArtist.id);
callback(closestArtist);
}, function(err)
{
console.error(err);
callback(err);
});
};
/**
* Gets the artists related to the given artist.
* @param {string} artistId the Spotify ID of the artist.
* @param {function} callback the callback to send the Json response to.
* @returns {Object} the most similar artist.
*/
this.getRelatedArtists = function(artistId, callback)
{
spotifyApi.getArtistRelatedArtists(artistId)
.then(function(data)
{
if (data.body.artists.length)
{
// Print the number of similar artists
//console.log('I got ' + data.body.artists.length + ' similar artists!');
callback(data.body);
}
else
{
console.log('No related artists found');
callback("No related artists found");
}
}, function(err)
{
console.log('Something went wrong..', err.message);
callback(err);
});
};
/**
* Gets the top tracks from the given artist.
* @param {string} artistId the id of the artist.
* @param {function} callback the callback to send the Json response to.
*/
this.getArtistTopTracks = function(artistId, callback)
{
spotifyApi.getArtistTopTracks(artistId, 'US')
.then(function(data)
{
//console.log(data.body);
callback(data.body);
}, function(err)
{
console.log('Something went wrong!', err);
callback(err);
});
};
/**
* Creates a playlist for the given user with the given title and songs.
* @param {string} user the username of the person creating the playlist.
* @param {string} playlistTitle the title of the playlist.
* @param {Array.<string>} tracks the tracks in the playlist. This should be an array of the form <code>["spotify:track:id", "spotify:track:id", ...]</code>.
*/
this.buildPlaylist = function(user, playlistTitle, tracks)
{
// Create a private playlist
spotifyApi.buildPlaylist(user, playlistTitle, { 'public':true })
.then(function(data)
{
//console.log('Created playlist!', data);
var playlistId = data.id; //TODO probably wrong.
// Add tracks to a playlist
spotifyApi.addTracksToPlaylist(user, playlistId, tracks)
.then(function(data)
{
console.log('Added tracks to playlist!');
}, function(err)
{
console.log('Something went wrong!', err);
});
}, function(err)
{
console.log('Something went wrong!', err);
});
};
this.getMe = function(authCode, callback)
{
if (authCode)
{
spotifyApi.authorizationCodeGrant(authCode)
.then(function(response)
{
var accessToken = response.body['access_token'];
console.log("Got Access Token: " + accessToken);
spotifyApi.setAccessToken(accessToken);
return spotifyApi.getMe();
})
.then(function(data)
{
console.log("Me: " + data);
callback(data.body);
});
}
else
{
spotifyApi.getMe()
.then(function(data)
{
callback(data);
}, function(err)
{
callback(err);
});
}
};
this.getAccessToken = function(callback)
{
callback(spotifyApi.getAccessToken());
};
this.refreshAccessToken = function(callback)
{
callback(spotifyApi.refreshAccessToken());
};
}
module.exports = SmartSpot;