Added CMarketItem

classes/CMarketItem.js

@@ -0,0 +1,129 @@
+var SteamCommunity = require('../index.js');
+var Cheerio = require('cheerio');
+
+SteamCommunity.prototype.getMarketItem = function(appid, hashName, callback) {
+	var self = this;
+	this.request("https://steamcommunity.com/market/listings/" + appid + "/" + encodeURIComponent(hashName), function(err, response, body) {
+		if(err || response.statusCode != 200) {
+			callback(err ? err.message : "HTTP error " + response.statusCode);
+			return;
+		}
+		
+		var $ = Cheerio.load(body);
+		if($('.market_listing_table_message') && $('.market_listing_table_message').text().trim() == 'There are no listings for this item.') {
+			callback('There are no listings for this item.');
+			return;
+		}
+		
+		var item = new CMarketItem(self, body, $);
+		if(item.commodity) {
+			item.updatePrice(function(err) {
+				if(err) {
+					callback(err);
+				} else {
+					callback(null, item);
+				}
+			});
+		} else {
+			callback(null, item);
+		}
+	});
+};
+
+function CMarketItem(community, body, $) {
+	this._community = community;
+	this._$ = $;
+	
+	this._country = "US";
+	var match = body.match(/var g_strCountryCode = "([^"]+)";/);
+	if(match) {
+		this._country = match[1];
+	}
+	
+	this.commodity = false;
+	var match = body.match(/Market_LoadOrderSpread\(\s*(\d+)\s*\);/);
+	if(match) {
+		this.commodity = true;
+		this.commodityID = parseInt(match[1], 10);
+	}
+	
+	this.medianSalePrices = null;
+	match = body.match(/var line1=([^;]+);/);
+	if(match) {
+		try {
+			this.medianSalePrices = JSON.parse(match[1]);
+			this.medianSalePrices = this.medianSalePrices.map(function(item) {
+				return {
+					"hour": new Date(item[0]),
+					"price": item[1],
+					"quantity": parseInt(item[2], 10)
+				};
+			});
+		} catch(e) {
+			// ignore
+		}
+	}
+	
+	this.quantity = 0;
+	this.lowestPrice = 0;
+	
+	if(!this.commodity) {
+		var total = $('#searchResults_total');
+		if(total) {
+			this.quantity = parseInt(total.text().replace(/[^\d]/g, '').trim(), 10);
+		}
+		
+		var lowest = $('.market_listing_price.market_listing_price_with_fee');
+		if(lowest[0]) {
+			this.lowestPrice = parseInt($(lowest[0]).text().replace(/[^\d]/g, '').trim(), 10);
+		}
+	}
+	
+	// TODO: Buying listings and placing buy orders
+}
+
+CMarketItem.prototype.updatePrice = function(callback) {
+	if(!this.commodity) {
+		throw new Error("Cannot update price for non-commodity item");
+	}
+	
+	// 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,
+		"json": true,
+	}, function(err, response, body) {
+		if(err || response.statusCode != 200) {
+			if(callback) {
+				callback(err ? err.message : "HTTP error " + response.statusCode);
+			}
+			
+			return;
+		}
+		
+		if(body.success != 1) {
+			if(callback) {
+				callback("Error " + body.success);
+			}
+			
+			return;
+		}
+		
+		var match = (body.sell_order_summary || '').match(/<span class="market_commodity_orders_header_promote">(\d+)<\/span>/);
+		if(match) {
+			self.quantity = parseInt(match[1], 10);
+		}
+		
+		self.buyQuantity = 0;
+		match = (body.buy_order_summary || '').match(/<span class="market_commodity_orders_header_promote">(\d+)<\/span>/);
+		if(match) {
+			self.buyQuantity = parseInt(match[1], 10);
+		}
+		
+		self.lowestPrice = parseInt(body.lowest_sell_order, 10);
+		self.highestBuyOrder = parseInt(body.highest_buy_order, 10);
+		
+		// TODO: The tables?
+		callback();
+	});
+};

index.js

@@ -260,6 +260,7 @@ SteamCommunity.prototype._myProfile = function(endpoint, form, callback) {
 	});
 };
 
+require('./classes/CMarketItem.js');
 require('./classes/CSteamGroup.js');
 require('./classes/CSteamUser.js');
 require('./components/chat.js');