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@iCaspar
Created December 12, 2018 01:55
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A cash register function
function checkCashRegister(price, cash, cid) {
const denominationVals = {
'ONE HUNDRED': 100,
'TWENTY': 20,
'TEN': 10,
'FIVE': 5,
'ONE': 1,
'QUARTER': 0.25,
'DIME': 0.1,
'NICKEL': 0.050,
'PENNY': 0.010
}
let changeSpecifics = {
status: 'OPEN',
change: []
}
let changeAmt = cash - price
let slot = cid.length
let slotAmts = []
while (slot-- > 0) {
let slotVal = denominationVals[cid[slot][0]]
if (changeAmt >= slotVal) {
let changeFromSlot = 0
let slotAmt = cid[slot][1]
while (slotAmt && (changeAmt >= slotVal)) {
changeFromSlot += slotVal
changeAmt -= slotVal
slotAmt -= slotVal
// Fix js rounding errors after subtracting floats
changeAmt = Math.round(changeAmt * 100) / 100
slotAmt = Math.round(slotAmt * 100) / 100
}
slotAmts.push(slotAmt)
changeSpecifics.change.push([cid[slot][0], changeFromSlot])
}
}
if (changeAmt > 0) {
changeSpecifics.status = 'INSUFFICIENT_FUNDS'
changeSpecifics.change = []
return changeSpecifics
}
let allGone = true
for (slot in slotAmts) {
if (slotAmts[slot] > 0) {
allGone = false
}
}
if (allGone === true) {
changeSpecifics.status = 'CLOSED'
changeSpecifics.change = cid
return changeSpecifics
}
return changeSpecifics
}
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