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Commit | Line | Data |
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50dafc4c MF |
1 | // Written by Mike Frysinger <vapier@gmail.com>. Released into the public domain. Suck it. |
2 | ||
4d3d4e03 | 3 | function Mpc(socket, cb_update_state, debug_enabled) { |
50dafc4c MF |
4 | this._socket = socket; |
5 | this._cb_update_state = cb_update_state; | |
4d3d4e03 | 6 | this._debug_enabled = debug_enabled; |
50dafc4c MF |
7 | this._queue = ['init']; |
8 | this.state = {}; | |
9 | } | |
10 | ||
4d3d4e03 MF |
11 | Mpc.prototype.log = function(msg, obj) { |
12 | if (this._debug_enabled) | |
13 | console.log('mpc: ' + msg, obj); | |
14 | } | |
15 | ||
16 | Mpc.prototype.set_debug = function(val) { | |
17 | this._debug_enabled = val; | |
50dafc4c MF |
18 | } |
19 | ||
20 | Mpc.prototype.send = function(msg) { | |
4d3d4e03 | 21 | var _this = this; |
50dafc4c MF |
22 | this._queue.push(msg); |
23 | this._socket.send(msg, function(x) { | |
4d3d4e03 | 24 | _this.log('send: ' + msg + ':', x); |
50dafc4c MF |
25 | }); |
26 | } | |
27 | ||
28 | Mpc.prototype.recv_msg = function(lines) { | |
29 | curr = this._queue.shift(); | |
4d3d4e03 | 30 | this.log('recv: [' + curr + ']:', lines.join('\n')); |
50dafc4c MF |
31 | curr = curr.split(' '); |
32 | ||
33 | switch (curr[0]) { | |
34 | // Needs to return a list of dicts (see above for dicts). | |
35 | //case 'playlistinfo': | |
36 | case 'currentsong': | |
37 | case 'stats': | |
38 | case 'status': | |
39 | state = {}; | |
40 | lines.forEach(function(line) { | |
41 | i = line.indexOf(':'); | |
42 | if (i == -1) | |
43 | return; // Ignores the OK line | |
44 | key = line.substr(0, i); | |
45 | val = line.substr(i + 2); | |
46 | state[key] = val; | |
47 | }); | |
48 | this.state = state; | |
49 | this._cb_update_state(state); | |
50 | break; | |
51 | default: | |
52 | this._cb_update_state(lines, curr); | |
53 | break; | |
54 | } | |
55 | } | |
56 | ||
57 | Mpc.prototype.recv = function(msg) { | |
58 | /* We can get back a bunch of responses in a row, so parse them out */ | |
59 | /* XXX: Do we have to handle partial reads ? like long playlists ... */ | |
60 | lines = msg.split('\n'); | |
61 | var i = 0; | |
62 | while (i < lines.length) { | |
63 | if (lines[i] == 'OK' || lines[i].substr(0, 3) == 'OK ') { | |
64 | this.recv_msg(lines.splice(0, i + 1)); | |
65 | i = 0; | |
66 | } else | |
67 | ++i; | |
68 | } | |
69 | } | |
70 | ||
71 | /* | |
72 | * Command generator helpers. | |
73 | */ | |
74 | ||
75 | Mpc.__make_send_void = function(cmd) { | |
76 | return function() { this.send(cmd); } | |
77 | } | |
78 | ||
79 | Mpc.__make_send_arg1 = function(cmd) { | |
80 | return function(a1) { | |
81 | if (a1 === undefined) | |
4d3d4e03 | 82 | this.log(cmd + ': function requires one argument'); |
50dafc4c MF |
83 | else |
84 | this.send(cmd + ' ' + a1); | |
85 | } | |
86 | } | |
87 | ||
88 | Mpc.__make_send_arg2 = function(cmd) { | |
89 | return function(a1, a2) { | |
90 | if (a1 === undefined || a2 === undefined) | |
4d3d4e03 | 91 | this.log(cmd + ': function requires two arguments'); |
50dafc4c MF |
92 | else |
93 | this.send(cmd + ' ' + a1 + ' ' + a2); | |
94 | } | |
95 | } | |
96 | ||
97 | Mpc.__make_send_opt = function(cmd) { | |
98 | return function(arg) { | |
99 | if (arg === undefined) | |
100 | arg = ''; | |
101 | this.send(cmd + ' ' + arg); | |
102 | }; | |
103 | } | |
104 | ||
105 | Mpc.__make_send_range = function(cmd, min, max, def) { | |
106 | return function(arg) { | |
107 | if (arg === undefined) | |
108 | arg = def; | |
109 | if (arg >= min && arg <= max) | |
110 | this.send(cmd + ' ' + arg); | |
111 | else | |
4d3d4e03 | 112 | this.log(cmd + ': arg must be [' + min + ',' + max + '] but got "' + arg + '"'); |
50dafc4c MF |
113 | }; |
114 | } | |
115 | ||
116 | /* | |
117 | * Querying MPD's status | |
118 | * http://www.musicpd.org/doc/protocol/ch03.html#idp118752 | |
119 | */ | |
120 | ||
121 | // clearerror | |
122 | Mpc.prototype.clearerror = Mpc.__make_send_void('clearerror'); | |
123 | // currentsong | |
124 | Mpc.prototype.currentsong = Mpc.__make_send_void('currentsong'); | |
125 | // idle [SUBSYSTEMS...] | |
126 | // TODO | |
127 | // status | |
128 | Mpc.prototype.status = Mpc.__make_send_void('status'); | |
129 | // stats | |
130 | Mpc.prototype.stats = Mpc.__make_send_void('stats'); | |
131 | ||
132 | /* | |
133 | * Playback options | |
134 | * http://www.musicpd.org/doc/protocol/ch03s02.html | |
135 | */ | |
136 | ||
137 | // consume {STATE} | |
138 | Mpc.prototype.consume = Mpc.__make_send_range('consume', 0, 1, 1); | |
139 | // crossfade {SECONDS} | |
f5ed7157 | 140 | Mpc.prototype.crossfade = Mpc.__make_send_arg1('crossfade'); |
50dafc4c MF |
141 | // mixrampdb {deciBels} |
142 | Mpc.prototype.mixrampdb = Mpc.__make_send_arg1('mixrampdb'); | |
143 | // mixrampdelay {SECONDS|nan} | |
144 | // Note: Probably should handle javascript NaN here. | |
145 | Mpc.prototype.mixrampdelay = Mpc.__make_send_arg1('mixrampdelay'); | |
146 | // random {STATE} | |
147 | Mpc.prototype.random = Mpc.__make_send_range('random', 0, 1, 1); | |
148 | // repeat {STATE} | |
149 | Mpc.prototype.repeat = Mpc.__make_send_range('repeat', 0, 1, 1); | |
150 | // setvol {VOL} | |
151 | Mpc.prototype.setvol = Mpc.__make_send_range('setvol', 0, 100); | |
152 | // single {STATE} | |
153 | Mpc.prototype.single = Mpc.__make_send_range('single', 0, 1, 1); | |
154 | // replay_gain_mode {MODE} | |
155 | Mpc.prototype.replay_gain_mode = Mpc.__make_send_arg1('replay_gain_mode'); | |
156 | // replay_gain_status | |
157 | ||
158 | /* | |
159 | * Controlling playback | |
160 | * http://www.musicpd.org/doc/protocol/ch03s03.html | |
161 | */ | |
162 | ||
163 | // next | |
164 | Mpc.prototype.next = Mpc.__make_send_void('next'); | |
165 | // pause {PAUSE} | |
166 | Mpc.prototype.pause = Mpc.__make_send_range('pause', 0, 1, 1); | |
167 | // play [SONGPOS] | |
168 | Mpc.prototype.play = Mpc.__make_send_opt('play'); | |
169 | // playid [SONGID] | |
170 | Mpc.prototype.playid = Mpc.__make_send_opt('playid'); | |
171 | // previous | |
172 | Mpc.prototype.previous = Mpc.__make_send_void('previous'); | |
173 | // seek {SONGPOS} {TIME} | |
174 | Mpc.prototype.seek = Mpc.__make_send_arg2('seek'); | |
175 | // seekid {SONGID} {TIME} | |
176 | Mpc.prototype.seekid = Mpc.__make_send_arg2('seekid'); | |
177 | // seekcur {TIME} | |
178 | Mpc.prototype.seekcur = Mpc.__make_send_arg1('seek'); | |
179 | // stop | |
180 | Mpc.prototype.stop = Mpc.__make_send_void('stop'); | |
181 | ||
182 | /* | |
183 | * Connection settings | |
184 | * http://www.musicpd.org/doc/protocol/ch03s08.html | |
185 | */ | |
186 | ||
187 | // close | |
188 | Mpc.prototype.close = Mpc.__make_send_void('close'); | |
189 | // kill | |
190 | Mpc.prototype.kill = Mpc.__make_send_void('kill'); | |
191 | // password {PASSWORD} | |
192 | Mpc.prototype.password = Mpc.__make_send_arg1('password'); | |
193 | // ping | |
194 | Mpc.prototype.ping = Mpc.__make_send_void('ping'); |