bugfix market-item price

and add currency option for .getMarketItem(appid, hashName, currency, cb)

classes/CMarketItem.js

@@ -1,7 +1,12 @@
 var SteamCommunity = require('../index.js');
 var Cheerio = require('cheerio');
 
-SteamCommunity.prototype.getMarketItem = function(appid, hashName, callback) {
+SteamCommunity.prototype.getMarketItem = function(appid, hashName, currency, callback) {
+	// steamCommunity.getMarketItem(appID, hashName, function(){...});
+	if (typeof currency == "function") {
+		callback = currency;
+		currency = 1;
+	}
 	var self = this;
 	this.request("https://steamcommunity.com/market/listings/" + appid + "/" + encodeURIComponent(hashName), function(err, response, body) {
 		if(self._checkHttpError(err, response, callback)) {
@@ -13,23 +18,21 @@ SteamCommunity.prototype.getMarketItem = function(appid, hashName, callback) {
 			callback(new Error("There are no listings for this item."));
 			return;
 		}
-		
+
-		var item = new CMarketItem(self, body, $);
+		var item = new CMarketItem(appid, hashName, self, body, $);
-		if(item.commodity) {
+		item.updatePrice({currency: currency}, function(err) {
-			item.updatePrice(function(err) {
+			if(err) {
-				if(err) {
+				callback(err);
-					callback(err);
+			} else {
-				} else {
+				callback(null, item);
-					callback(null, item);
+			}
-				}
+		});
-			});
-		} else {
-			callback(null, item);
-		}
 	});
 };
 
-function CMarketItem(community, body, $) {
+function CMarketItem(appid, hashName, community, body, $) {
+	this._appid = appid;
+	this._hashName = hashName;
 	this._community = community;
 	this._$ = $;
 	
@@ -38,6 +41,12 @@ function CMarketItem(community, body, $) {
 	if(match) {
 		this._country = match[1];
 	}
+
+	this._language = "english";
+	match = body.match(/var g_strLanguage = "([^"]+)";/);
+	if(match) {
+		this._language = match[1];
+	}
 	
 	this.commodity = false;
 	var match = body.match(/Market_LoadOrderSpread\(\s*(\d+)\s*\);/);
@@ -62,7 +71,20 @@ function CMarketItem(community, body, $) {
 			// ignore
 		}
 	}
-	
+
+	this.firstAsset = null;
+	this.assets = null;
+	match = body.match(/var g_rgAssets = (.*);/);
+	if (match) {
+		try {
+			this.assets = JSON.parse(match[1]);
+			this.assets = this.assets['730']['2'];
+			this.firstAsset = this.assets[Object.keys(this.assets)[0]];
+		} catch (e) {
+			// ignore
+		}
+	}
+
 	this.quantity = 0;
 	this.lowestPrice = 0;
 	
@@ -81,15 +103,28 @@ function CMarketItem(community, body, $) {
 	// TODO: Buying listings and placing buy orders
 }
 
-CMarketItem.prototype.updatePrice = function(callback) {
+CMarketItem.prototype.updatePrice = function (options, callback) {
+	options = options || {};
+	options.currency = options.currency || 1;
+
+	if (this.commodity) {
+		this.updatePriceForCommodity(options, callback);
+	} else {
+		this.updatePriceForNonCommodity(options, callback);
+	}
+};
+
+CMarketItem.prototype.updatePriceForCommodity = function(options, callback) {
 	if(!this.commodity) {
 		throw new Error("Cannot update price for non-commodity item");
 	}
+
+	options = options || {};
+	var currency = options.currency;
 	
-	// TODO: Currency option maybe?
 	var self = this;
 	this._community.request({
-		"uri": "https://steamcommunity.com/market/itemordershistogram?country=US&language=english&currency=1&item_nameid=" + this.commodityID,
+		"uri": "https://steamcommunity.com/market/itemordershistogram?country=US&language=english&currency=" + currency + "&item_nameid=" + this.commodityID,
 		"json": true,
 	}, function(err, response, body) {
 		if(self._community._checkHttpError(err, response, callback)) {
@@ -124,3 +159,50 @@ CMarketItem.prototype.updatePrice = function(callback) {
 		}
 	});
 };
+
+CMarketItem.prototype.updatePriceForNonCommodity = function (options, callback) {
+	if(this.commodity) {
+		throw new Error("Cannot update price for commodity item");
+	}
+
+	options = options || {};
+	var currency = options.currency;
+
+	var self = this;
+	this._community.request({
+		"uri": "https://steamcommunity.com/market/listings/" +
+			this._appid + "/" +
+			encodeURIComponent(this._hashName) +
+			"/render/?query=&start=0&count=10&country=US&language=english&currency=" + currency,
+		"json": true
+	}, function(err, response, body) {
+		if (self._community._checkHttpError(err, response, callback)) {
+			return;
+		}
+
+		if (body.success != 1) {
+			callback && callback(new Error("Error " + body.success));
+			return;
+		}
+
+		var match = body.total_count;
+		if (match) {
+			self.quantity = parseInt(match, 10);
+		}
+
+		var lowestPrice;
+		var $ = Cheerio.load(body.results_html);
+		match = $(".market_listing_price.market_listing_price_with_fee");
+		if (match) {
+			for (var i = 0; i < match.length; i++) {
+				lowestPrice = parseFloat($(match[i]).text().replace(",", ".").replace(/[^\d.]/g, ''));
+				if (!isNaN(lowestPrice)) {
+					self.lowestPrice = lowestPrice * 100;
+					break;
+				}
+			}
+		}
+
+		callback && callback(null);
+	});
+};