trade.js

/**
 * Places an order for a good from a holding.
 * @param  {int} holdingId  The holding id.
 * @param  {string} good  	The good id.
 * @param  {string} goodCategory  	The good category: resource, component.
 * @param  {float} price    The price of the order.
 * @param  {int} quantity The quantity of goods ordered.
 * @param  {string} orderType     The type of purchase: trade or order.
 * @return {boolean}          TRUE if the order was placed, FALSE if there were insufficient resources.
 */
placeTradeOrder: function(holdingId, good, goodCategory, price, quantity, orderType){
	var holding = jg.data.holdings[holdingId];
	var totalCost = price * quantity;
	var canOrder = (((orderType === 'order') && (holding.resources.supply.credits >= totalCost)) || (orderType === 'trade'));

	if (canOrder){
		holding.data.economic.trade.orders[good] = {
			faction: holding.data.faction,
			holding: holding.data.id,
			good: good,
			goodCategory: goodCategory,
			price: price,
			quantity: quantity,
			total: totalCost,
			orderType: orderType,
			timestamp: jg.data.state.timestamp
		};

		if (orderType === 'order'){
			holding.resources.supply.credits -= totalCost;
		}
	}

	return canOrder;
},