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Pass all tests #12

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41 changes: 41 additions & 0 deletions orderBook.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,41 @@
function reconcileOrder(existingBook, incomingOrder) {
let updates = []
let newOrders = []

if (!existingBook.length) {
updates.push(incomingOrder)

return updates
}

for (let i = 0; i < existingBook.length; i++) {
if (existingBook[i].type !== incomingOrder.type &&
existingBook[i].price === incomingOrder.price &&
existingBook[i].quantity === incomingOrder.quantity) {
incomingOrder.price = -1

} else if (existingBook[i].type !== incomingOrder.type &&
existingBook[i].price === incomingOrder.price &&
existingBook[i].quantity !== incomingOrder.quantity) {

if (existingBook[i].quantity > incomingOrder.quantity) {
existingBook[i].quantity = existingBook[i].quantity - incomingOrder.quantity
incomingOrder.quantity = 0
newOrders.push(existingBook[i])

} else {
incomingOrder.quantity = incomingOrder.quantity - existingBook[i].quantity
}
} else {
updates.push(existingBook[i])
}
}
if (incomingOrder.price !== -1 && incomingOrder.quantity !== 0) {
updates.push(incomingOrder)
}

return updates.concat(newOrders)
}

module.exports = {reconcileOrder}