OAuthの実装(表面)

require("./evil");
var cURL = require("./curl").cURL;

exports.TwitterOAuth  = function (consumerKey, consumerSecret) {
	this.consumerKey = consumerKey;
	this.consumerSecret = consumerSecret;
	var parent = this;
	
	this.BaseClass = function (token, tokenSecret) {
		this.token = token;
		this.tokenSecret = tokenSecret;
		
		this.parameter = new Object();
		this.url = new String();
		this.method = new String();
		
		this.setDefaultParameters = function () {
			var nonce = Evil.getNonce(20);
			var timestamp = Evil.getTimestamp();
			
			this.parameter = {
				oauth_consumer_key: consumerKey,
				oauth_nonce: nonce,
				oauth_signature_method: "HMAC-SHA1",
				oauth_timestamp: timestamp,
				oauth_version: "1.0"
			};
			if (this.token) {
				this.parameter["oauth_token"] = this.token;
			}
		}
		
		this.setPIN = function (PIN) {
			this.parameter["oauth_verifier"] = PIN;
		}
		
		this.setSignature = function () {
			var parameterString = Evil.generateParameter(this.parameter);
			var signature = Evil.generateSignature(this.method, this.url, parameterString, parent.consumerSecret, this.tokenSecret);
			this.parameter["oauth_signature"] = signature;
			return signature;
		}
		
		this.execute = function (callback) {
			var curl = new cURL(this.url, this.method);
			curl.query = this.parameter;
			curl.access(callback);
		}
	}
	
	this.API = function (token, tokenSecret) {
		this.update = function (options, callback) {
			var base = new parent.BaseClass(token, tokenSecret);
			base.setDefaultParameters();
			for (var key in options) {
				base.parameter[key] = Evil.escapeChars(options[key]);
			}
			base.url = "http://api.twitter.com/1/statuses/update.json";
			base.method = "POST";
			base.setSignature();
			base.execute(callback);
		}
		
		this.homeTimeline = function (options, callback) {
			var base = new parent.BaseClass(token, tokenSecret);
			base.setDefaultParameters();
			for (var key in options) {
				base.parameter[key] = Evil.escapeChars(options[key]);
			}
			base.url = "http://api.twitter.com/1/statuses/home_timeline.json";
			base.method = "GET";
			base.setSignature();
			base.execute(callback);
		}
	}
}