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functions.js
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functions.js
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function invertKeysMap(keysMap) {
const recursiveInverseKeys = []
const inverseKeysMap = Object.assign(...Object.entries(keysMap).map(
function ([ key, [ inverseKey, valueKeysMap ] ]) {
return {
[inverseKey]: [
key,
valueKeysMap && (
valueKeysMap === keysMap ?
recursiveInverseKeys.push(inverseKey)
:
invertKeysMap(valueKeysMap)
),
],
}
}
))
recursiveInverseKeys.forEach(
function (inverseKey) {
inverseKeysMap[inverseKey][1] = inverseKeysMap
}
)
return inverseKeysMap
}
function mapKeys(keysMap, obj) {
return (
typeof obj === 'string' ?
(keysMap[obj] || [ obj ])[0]
:
Array.isArray(obj) ?
obj.map(mapKeys.bind(0, keysMap))
:
Object.assign({}, ...Object.entries(obj).map(
function ([ key, value ]) {
const [ mappedKey = key, valueKeysMap ] = keysMap[key] || []
return {
[mappedKey]: (
valueKeysMap && value ?
mapKeys(valueKeysMap, value)
:
value
),
}
}
))
)
}
export function keysMappers(keysMap) {
return [
mapKeys.bind(0, keysMap),
mapKeys.bind(0, invertKeysMap(keysMap)),
]
}
export function compressStepsLossy(steps, mergedSteps = []) {
for (let i = 1, step = steps[0]; i <= steps.length; i++)
step = steps[i] && step.merge(steps[i]) || mergedSteps.push(step) && steps[i]
return mergedSteps
}