52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
import { filter, identity, map, range, reverse } from 'lodash-es'
|
|
|
|
|
|
const makeFactorsOf = target => {
|
|
return filter(range(target), idx => (target % idx) == 0)
|
|
}
|
|
|
|
const makeUpTo = (from, target, step) => {
|
|
return range(from, target, step)
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {Object} options
|
|
* @param {number} [options.factorsOf]
|
|
* @param {number} [options.upTo]
|
|
* @param {number} [options.from]
|
|
* @param {number} [options.step]
|
|
* @param {boolean} [options.reverse]
|
|
* @param {Function} [options.valueFunc]
|
|
* @returns {[string,string][]}
|
|
*/
|
|
export const makeOptions = (options = {}) => {
|
|
let optionValues
|
|
|
|
if(options.factorsOf) {
|
|
optionValues = makeFactorsOf(options.factorsOf)
|
|
|
|
} else if(options.upTo) {
|
|
const
|
|
from = options.from || 0,
|
|
step = options.step || 1
|
|
|
|
optionValues = makeUpTo(from, options.upTo, step)
|
|
}
|
|
|
|
if(!optionValues) {
|
|
throw new Error(`No valid options sent to makeOptions: ${options}`)
|
|
}
|
|
|
|
if(options.reverse) {
|
|
optionValues = reverse(optionValues)
|
|
}
|
|
|
|
const
|
|
valueFunc = options.valueFunc || identity,
|
|
mappedValues = map(optionValues, labelValue =>
|
|
map([ labelValue, valueFunc(labelValue) ], String)
|
|
)
|
|
|
|
return mappedValues
|
|
}
|