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refactor: simplify solutionToOriginalUnits()

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This commit is contained in:
siiky 2023-11-20 18:08:11 +00:00
parent e4aadc44c1
commit 2cb52a925d
1 changed files with 13 additions and 10 deletions
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23
lib/bill-math.js
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@ -123,17 +123,20 @@ const getSolution = (units, amount, mode) => {
}
const solutionToOriginalUnits = (solution, units) => {
const billsLeft = _.clone(_.fromPairs(_.map(it => [it.denomination, it.provisioned])(solution)))
return _.reduce(
(acc, value) => {
const unit = units[value]
const billsToAssign = _.clamp(0, unit.count)(_.isNaN(billsLeft[unit.denomination]) || _.isNil(billsLeft[unit.denomination]) ? 0 : billsLeft[unit.denomination])
acc.push({ name: unit.name, denomination: unit.denomination, provisioned: billsToAssign })
billsLeft[unit.denomination] -= billsToAssign
return acc
const billsToAssign = (count, left) => _.clamp(0, count)(_.isNaN(left) || _.isNil(left) ? 0 : left)
const billsLeft = _.flow(
_.map(([denomination, provisioned]) => [BN(denomination), provisioned]),
_.fromPairs,
)(solution)
return _.map(
({ count, name, denomination }) => {
const provisioned = billsToAssign(count, billsLeft[denomination])
billsLeft[denomination] -= provisioned
return { name, denomination, provisioned }
},
[],
_.range(0, _.size(units))
units
)
}