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CDController.ts
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CDController.ts
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declare var child_process : any;
import udev = require('udev');
import mb = require('musicbrainz');
import libQ = require('kew');
import {exec} from 'child_process';
import {readdir} from 'fs';
import {SimpleEventDispatcher, SignalDispatcher, EventDispatcher, ISignal, IEvent, ISimpleEvent} from 'strongly-typed-events'
import libdiscid = require('./libdiscid');
export interface IDisc {
discName: string,
artist: string,
cover: string,
tracks: ITrack[]
}
export interface ITrack {
track: number,
name: string,
duration: number
}
export interface ICDState {
loaded: boolean,
disc: IDisc
}
export interface IDrives {
[name: string]: ICDState
}
export class CDController {
private context : any;
private commandRouter: any;
private logger: any;
private udevMonitor: any;
private cdDrives: IDrives = {};
private _onEjected = new SimpleEventDispatcher<string>();
private _onLoaded = new SimpleEventDispatcher<string>();
constructor(context: any) {
let self = this;
this.context = context;
this.logger = this.context.logger;
this.commandRouter = this.context.coreCommand;
this.udevMonitor = udev.monitor();
this.udevMonitor.on('change', function (device: any)
{
self.logger.info('udev action: '+ JSON.stringify(device, null, 4));
// has a devname entry like /dev/sr...
if(device.DEVNAME != null && device.DEVNAME.startsWith('/dev/sr')) {
if(device.ID_CDROM_MEDIA != null) {
if(device.ID_CDROM_MEDIA_TRACK_COUNT_AUDIO != null) {
// audio disc present
self.setDriveACL(device.DEVNAME);
self.addDriveInfo(device.DEVNAME);
} else {
// no audio disc
}
} else {
// ejected
self.logger.info('ejected');
self.cdDrives[device.DEVNAME] = {loaded: false, disc: null};
self._onEjected.dispatch(device.DEVNAME);
}
}
});
readdir('/dev/', function(err, items){
if(err){
self.logger.info('error : ' + err);
}
for(let item of items){
if(item.startsWith('sr')) {
self.setDriveACL('/dev/' + item);
self.addDriveInfo('/dev/' + item);
}
}
});
}
private addDriveInfo(drive: string) {
let self = this;
libdiscid.getTracksFromMusicBrainz(drive)
.fail(function(e){
self.logger.info(e);
return libdiscid.getTracksFromDisc(drive);
})
.then(function(disc: IDisc){
self.cdDrives[drive] = {loaded: true, disc: disc};
self._onLoaded.dispatch(drive);
})
.fail(function(e){
// no disc
self.cdDrives[drive] = {loaded: false, disc: {discName:'', artist:'', cover: '', tracks: []}}
self.logger.info(e);
})
}
public get onEjected(): ISimpleEvent<string> {
return this._onEjected.asEvent();
}
public get onLoaded(): ISimpleEvent<string> {
return this._onLoaded.asEvent();
}
public get getDrives(): IDrives {
return this.cdDrives;
}
public getDisc(drive: string): ICDState {
return this.cdDrives[drive];
}
public eject(drive: string) {
let self = this;
exec('/usr/bin/eject ' + drive , function (error, stdout, stderr) {
if(error){
self.logger.info('Cannot eject drive ' + drive);
}
});
}
public setDriveACL(drive: string)
{
let self = this;
if(drive) {
self.logger.info('Adjusting ACL of drive ' + drive);
exec('/usr/bin/sudo /bin/chmod 666 ' + drive, function (error, stdout, stderr){
if(error){
self.logger.info('Cannot adjust ACL of drive ' + drive);
}
});
}
}
public setDriveSpeed(drive: string, speed: number)
{
let self = this;
if(speed) {
exec('/usr/bin/eject -x '+ speed.toString() + ' ' + drive, function (error, stdout, stderr){
if(error){
self.logger.info('Cannot adjust speed of drive ' + drive);
}
self.logger.info(stdout);
self.logger.info(stderr);
});
}
}
}