validator/types/array.js

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const Base = require('./base.js')
const util = require('util')
const validate = require('../validate.js')
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class TypeArray extends Base {
constructor () {
super()
this._type = 'object'
this._empty = false
this._min = null
this._max = null
/**
* @type {Base[]}
*/
this._itemTypes = []
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}
/**
* set allow empty
*/
empty () {
this._empty = true
return this
}
/**
* set min length
* @param {number} num
*/
min (num) {
if (!isFinite(num) || num === true || num === false) throw new Error('input wrong')
if (this._max !== null && this._max <= num) throw new Error(`num >= ${this._max}`)
if (num < 0) throw new Error('array length must >= 0')
this._min = parseFloat(num)
return this
}
items (...args) {
this._itemTypes.push(...args)
return this
}
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/**
* set max length
* @param {number} num
*/
max (num) {
if (!isFinite(num) || num === true || num === false) throw new Error('input wrong')
if (this._min !== null && this._min >= num) throw new Error(`num <= ${this._min}`)
this._max = parseFloat(num)
return this
}
validate (value) {
if (value === undefined && this._required) return `required`
if (value === undefined) return null
/* eslint-disable-next-line */
if (typeof value !== this._type) return `${util.inspect(value, false, null)} type not array`
if (!Array.isArray(value)) return `${util.inspect(value, false, null)} type not array`
if (!this._empty && value.length === 0) return `not allow empty`
if (this._min !== null && value.length < this._min) return `value length < ${this._min}`
if (this._max !== null && value.length > this._max) return `value length > ${this._max}`
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if (this._itemTypes.length > 0) {
for (const item of value) {
let verified = false
let fail = ''
for (const type of this._itemTypes) {
const result = type.validate(item)
if (result) {
fail = result
} else {
verified = true
fail = ''
break
}
}
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if (!verified || fail) return fail || `item type not match`
}
}
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return null
}
}
module.exports = TypeArray