You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
'use strict'
|
|
|
|
const JSON = require('lossless-json') // override JSON for user's code
|
|
|
|
|
|
|
|
function reduce(json, code) {
|
|
|
|
if (process.env.FX_APPLY) {
|
|
|
|
return global[process.env.FX_APPLY](code)(json)
|
|
|
|
}
|
|
|
|
|
|
|
|
if ('.' === code) {
|
|
|
|
return json
|
|
|
|
}
|
|
|
|
|
|
|
|
if ('?' === code) {
|
|
|
|
return Object.keys(json)
|
|
|
|
}
|
|
|
|
|
|
|
|
if (/^(\.\w*)+\[]/.test(code)) {
|
|
|
|
function fold(s) {
|
|
|
|
if (s.length === 1) {
|
|
|
|
return 'x => x' + s[0]
|
|
|
|
}
|
|
|
|
let obj = s.shift()
|
|
|
|
obj = obj === '.' ? 'x' : 'x' + obj
|
|
|
|
return `x => Object.values(${obj}).flatMap(${fold(s)})`
|
|
|
|
}
|
|
|
|
code = fold(code.split('[]'))
|
|
|
|
}
|
|
|
|
|
|
|
|
if (/^\.\[/.test(code)) {
|
|
|
|
return eval(`function fn() {
|
|
|
|
return this${code.substring(1)}
|
|
|
|
}; fn`).call(json)
|
|
|
|
}
|
|
|
|
|
|
|
|
if (/^\./.test(code)) {
|
|
|
|
return eval(`function fn() {
|
|
|
|
return this${code}
|
|
|
|
}; fn`).call(json)
|
|
|
|
}
|
|
|
|
|
|
|
|
const fn = eval(`function fn() {
|
|
|
|
return ${code}
|
|
|
|
}; fn`).call(json)
|
|
|
|
|
|
|
|
if (typeof fn === 'function') {
|
|
|
|
return fn(json)
|
|
|
|
}
|
|
|
|
return fn
|
|
|
|
}
|
|
|
|
|
|
|
|
module.exports = reduce
|