Updated deprecated loadPartnerInventory method to use the /partnerinv…

…entory/ endpoint

lib/classes/TradeOffer.js

@@ -145,7 +145,73 @@ TradeOffer.prototype.data = function(key, value) {
  * @param {function} callback
  */
 TradeOffer.prototype.loadPartnerInventory = function(appid, contextid, callback) {
-	this.manager.loadUserInventory(this.partner, appid, contextid, true, callback);
+	let items = [];
+
+	let req = (start) => {
+		let qs = {
+			sessionid: this.manager._community.getSessionID(),
+			partner: this.partner.toString(),
+			appid,
+			contextid
+		};
+
+		if (start) {
+			qs.start = start;
+		}
+
+		let refererUrl = 'https://steamcommunity.com/tradeoffer/new/?partner=' + this.partner.accountid;
+		if (this._token) {
+			refererUrl += '&token=' + this._token;
+		}
+
+		this.manager._community.httpRequest({
+			method: 'GET',
+			uri: 'https://steamcommunity.com/tradeoffer/new/partnerinventory/',
+			qs,
+			headers: {
+				Referer: refererUrl
+			},
+			json: true
+		}, (err, response, body) => {
+			if (err) {
+				callback(err);
+				return;
+			}
+
+			if (response.statusCode != 200) {
+				callback(new Error('HTTP error ' + response.statusCode));
+				return;
+			}
+
+			if (!body || !body.success) {
+				callback(new Error('Malformed response'));
+				return;
+			}
+
+			for (let i in (body.rgInventory || {})) {
+				let item = body.rgInventory[i];
+				let descKey = [item.classid, item.instanceid || 0].join('_');
+				let description = (body.rgDescriptions || {})[descKey];
+
+				for (let j in description) {
+					item[j] = description[j];
+				}
+
+				item.appid = appid;
+				item.contextid = contextid;
+
+				items.push(new EconItem(item));
+			}
+
+			if (body.more) {
+				req(body.more_start);
+			} else {
+				callback(null, items);
+			}
+		});
+	};
+
+	req();
 };
 
 /**