125 lines
3.4 KiB
JavaScript
125 lines
3.4 KiB
JavaScript
/* eslint-disable no-restricted-globals,no-param-reassign,guard-for-in,no-restricted-syntax,no-continue */
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const mod = {}
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module.exports = mod
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/**
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* check value is number
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* @param {any} v input value
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* @return {boolean}
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*/
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mod.isNumber = v => !(!isFinite(v) || v === true || v === false || v === null || v === '')
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/**
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* value to number
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* @param {object} v source value
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* @param {number=} defVal default value
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* @param {number=} min range min
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* @param {number=} max range max
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* @return {number}
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*/
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mod.toNumber = (v, defVal, min, max) => {
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let defaultVal = defVal
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let inVal = v
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if (!mod.isNumber(defVal)) defVal = 0
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if (typeof defVal === 'string') defaultVal = parseFloat(defVal)
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const minVal = !mod.isNumber(min) ? null : typeof min === 'string' ? parseFloat(min) : min; // eslint-disable-line
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const maxVal = !mod.isNumber(max) ? null : typeof max === 'string' ? parseFloat(max) : max; // eslint-disable-line
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if (!mod.isNumber(v)) return defaultVal
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if (typeof v === 'string') inVal = parseFloat(v)
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if (minVal !== null && inVal < minVal) inVal = min
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if (maxVal !== null && inVal > maxVal) inVal = max
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return inVal
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}
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/**
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* @exports
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* @typedef pageObject
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* @prop {number} total page number
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* @prop {number} page number
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* @prop {number} count all count number
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* @prop {number} limit query limit item
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* @prop {number} offset query offset number
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*
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* calc page object
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* @param {number} argCount all count
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* @param {number} argPage page number
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* @param {number} argMaxItem per page item show
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* @return {pageObject}
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*/
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mod.calcPage = (argCount, argPage, argMaxItem = 10) => {
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const count = mod.toNumber(argCount, 0, 0)
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let page = mod.toNumber(argPage, 1, 1)
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const maxItem = mod.toNumber(argMaxItem, 10, 1)
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let total = Math.ceil(count / maxItem)
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if (total < 1) total = 1
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if (page > total) page = total
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let offset = (page - 1) * maxItem
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if (offset > count) offset = count
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const limit = maxItem
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const pageObject = { total, page, count, offset, limit }
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for (const key in pageObject) {
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pageObject[key] = mod.toNumber(pageObject[key])
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}
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return pageObject
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}
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/**
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* deep copy object
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* @param {any} src
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* @return {any}
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*/
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mod.copyObject = src => {
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if (typeof src !== 'object') return src
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const isArray = Array.isArray(src)
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const copy = isArray ? [] : {}
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for (let it in src) {
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// @ts-ignore
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if (isArray) it = parseInt(it, 10)
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if (typeof src[it] !== 'object') copy[it] = src[it]
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else copy[it] = mod.copyObject(src[it])
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}
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return copy
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}
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/**
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* @typedef {(string|number)} SelectObjectAlias
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* @description pass string and length > 0 rename key to alias, other keep key name
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*/
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/**
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* @exports
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* @typedef {{[key: string]: SelectObjectAlias }} SelectObjectParam
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*/
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/**
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* select object keys
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* @param {Object<string, any>} obj
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* @param {SelectObjectParam} param
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*/
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mod.selectObject = (obj, param) => {
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if (typeof obj !== 'object' || typeof param !== 'object') throw new Error('input arg wrong')
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let newObj = {}
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for (const key in param) {
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const strs = key.split('.')
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const alias = param[key]
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if (strs.length > 1) {
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if (!(strs[0] in obj)) continue
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newObj = { ...newObj, ...mod.selectObject(obj[strs[0]], { [strs.slice(1).join('.')]: alias }) }
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}
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const toAlias = param[key] && typeof param[key] === 'string'
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if (!(key in obj)) continue
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newObj[toAlias ? alias : key] = obj[key]
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}
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return newObj
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}
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