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'use strict'
const { isString, map, fromPairs } = require('lodash')
const { hasValue } = require('@metascraper/helpers')
const mapValuesDeep = require('map-values-deep')
const xss = require('xss')
const noopTest = () => true
const getValue = async ({ htmlDom, url, rules, meta }) => {
const lastIndex = rules.length
let index = 0
let value
do {
const rule = rules[index++]
const test = rule.test || noopTest
if (test({ htmlDom, url, meta })) {
value = await rule({ htmlDom, url, meta })
}
} while (!hasValue(value) && index < lastIndex)
return value
}
const escapeValue = (value, { escape }) =>
!escape
? value
: mapValuesDeep(value, value => (isString(value) ? xss(value) : value))
const getData = async ({ rules, htmlDom, url, escape }) => {
const data = await Promise.all(
map(rules, async ([propName, innerRules]) => {
const rawValue = await getValue({ htmlDom, url, rules: innerRules })
const value = hasValue(rawValue)
? escapeValue(rawValue, { escape })
: null
return [propName, value]
})
)
return fromPairs(data)
}
module.exports = getData
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