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/*jshint forin:true, noarg:true, noempty:true, eqeqeq:true, bitwise:true, strict:true, undef:true, unused:true, curly:true, browser:true, devel:true, indent:4, maxerr:50 */
/*global require:true, module:true, __dirname:true */
var Util = require('util');
var EventEmitter = require('events').EventEmitter;
var Http = require('http');
var Crypto = require('crypto');
var fs = require('fs');
var path = require('path');
var Helper = require('../lib/helpers.js');
var base_url = 'api.trakt.tv';
var api = require('./api-actions.js');
var Url = require('url');
var Trakt = module.exports = function (options) {
"use strict";
this.config = JSON.parse(fs.readFileSync(path.resolve(__dirname, '../config.json'), 'utf8'));
if (options && options.api_key) {
this.config.api_key = options.api_key;
}
if (!this.config.api_key) {
throw new Error('No API key specified');
}
if (options) {
this.setUser.call(this, options.username, options.password, options.pass_hash);
}
};
Util.inherits(Trakt, EventEmitter);
Trakt.prototype.setUser = function (username, password, pass_hash) {
"use strict";
this.config.username = username;
this.config.password = pass_hash ? password : password ? Crypto.createHash('sha1')
.update(password)
.digest('hex') : undefined;
};
// TODO: Split this beast up and implement some nifty events
Trakt.prototype.request = function (action, method, options, callback) {
"use strict";
if (!api[action]) {
return callback(new Error('Invalid action: ' + action));
}
var opts = Helper.apiMethod(action, method);
if (!opts) {
return callback(new Error('Invalid method ' + method + ' for action ' + action));
}
if (opts.type === 'GET') {
getRequest.call(this, action, opts, options, callback);
} else if (opts.type === 'POST') {
postRequest.call(this, action, opts, options, callback);
}
};
var getRequest = function (action, opts, options, callback) {
"use strict";
var self = this;
var url = getGetUrl.call(self, action, opts, 'json', options);
if (!url) {
return callback(new Error('Missing parameters'));
}
var request_options = Url.parse(url);
if (self.config.username && self.config.password) {
request_options.auth = self.config.username + ':' + self.config.password;
}
var req = Http.request(request_options, function (res) {
res.setEncoding('utf8');
var result = '';
res.on('data', function (chunk) {
result += chunk;
})
.on('end', function () {
try {
var json = JSON.parse(result);
} catch(e) {
self.emit('error', e);
return callback(e);
}
if (res.statusCode !== 200) {
var err = new Error('Trakt responded ' + res.statusCode + ' - ' + Http.STATUS_CODES[res.statusCode]);
self.emit('error', err, json);
return callback(err, json);
}
self.emit('data', json);
return callback(null, json);
})
.on('error', function (err) {
self.emit('error', err);
return callback(err);
});
});
req.setTimeout(self.config.timeout);
req.end();
};
var postRequest = function (action, opts, options, callback) {
"use strict";
var self = this;
if (!this.config.username || !this.config.password) {
return callback(new Error('POST messages require username and password'));
}
var params = getPostParams(action, opts, options);
if (!params) {
return callback(new Error('Missing parameters'));
}
params.username = self.config.username;
params.password = self.config.password;
var data = JSON.stringify(params);
var url = Url.parse(getPostUrl.call(self, action, opts));
url.method = 'POST';
url.headers = {
'Content-Length': data.length
};
var req = Http.request(url, function (res) {
var result = '';
res.setEncoding('utf8');
res.on('data', function (chunk) {
result += chunk;
})
.on('end', function () {
try {
var json = JSON.parse(result);
if (res.statusCode !== 200) {
var err = new Error('Trakt responded ' + res.statusCode + ' - ' + Http.STATUS_CODES[res.statusCode]);
self.emit('error', err, json);
return callback(err, json);
}
self.emit('data', json);
return callback(null, json);
} catch (e) {
self.emit('error', e, result);
return callback(e);
}
})
.on('error', function (err) {
self.emit('error', err);
return callback(err);
});
});
req.setTimeout(this.config.timeout);
req.end(data);
};
/*
* Url generating functions
*/
var getGetUrl = function (action, opts, format, options) {
"use strict";
var url = 'http://' + base_url + '/' + action + '/' + opts.method + '.' + format + '/' + this.config.api_key;
var length = opts.parameters.length;
for (var i = 0; i < length; i++) {
var param = opts.parameters[i];
if (options[param.name]) {
if (typeof options[param.name] != 'string') options[param.name] = '' + options[param.name]
url += '/' + options[param.name].replace(/ /g, '+');
} else {
if (!param.optional) {
return undefined;
} else {
break;
}
}
}
return url.replace(' ', '+');
};
var getPostUrl = function (action, opts) {
"use strict";
return 'http://' + base_url + '/' + action + '/' + opts.method + '/' + this.config.api_key;
};
var getPostParams = function (action, opts, options) {
"use strict";
var result = {};
var length = opts.parameters.length;
for (var i = 0; i < length; i++) {
var param = opts.parameters[i];
if (options[param.name]) {
result[param.name] = options[param.name];
} else if (!param.optional) {
return undefined;
}
}
return result;
};
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