dz-app/utils/index.js

import {array, func, object, string} from "@/uni_modules/uv-ui-tools/libs/function/test";
import _ from "lodash";
import mxConfig from "@/common/mxConfig";

export const sizeFormat = function (size, decimals = 2) {
    if (size === 0) return '0 B';

    const k = 1024; // 转换单位
    const units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']; // 单位数组
    const i = Math.floor(Math.log(size) / Math.log(k)); // 计算当前单位的索引

    // 转换为对应单位，保留指定的小数位
    const formattedSize = parseFloat((size / Math.pow(k, i)).toFixed(decimals));

    return `${formattedSize} ${units[i]}`;
}

export const getSizeOfObject = function (obj) {
    // console.log('getSizeOfObject', obj)
    if (!object(obj) && !array(obj)) return 0
    return new Blob([JSON.stringify(obj)]).size
}

export const blockRunner = async function (blockFn) {
    if (func(blockFn)) {
        const result = blockFn()
        if (_.isBoolean(result) && !result) return Promise.reject(`blockFn returns false`)
        else if (result instanceof Promise) await result
    }
    return true // 其它情况默认通过
}

/*
* @description 拼接OSS路径
* @param {src} 原始路径
* */
export const combineOssFile = function (src) {
    if (!string(src)) return src
    const lowerCaseStr = src.toLowerCase()
    if (lowerCaseStr.startsWith('http')) return src
    if (['.jpg', '.png', '.gif', '.jpeg'].every(suffix => !lowerCaseStr.includes(suffix))) return src
    const baseUrl = mxConfig.ossFileBase || ''
    const comb = baseUrl.endsWith('/') || src.startsWith('/') ? '' : '/'
    return [baseUrl, comb, src].join('')
}

/**
 * @description 使用这个方法让属性定义看起来更紧凑
 * @param defaultValue
 * @param {StringConstructor|NumberConstructor|BooleanConstructor|ObjectConstructor|FunctionConstructor|ArrayConstructor|Array} type, `String` as default.
 * */
export function createPropDefine(defaultValue, type = String, validator = undefined) {
    return {
        type: type,
        default: () => defaultValue,
        validator
    }
}

/*
* @description 这个方法是兼容vue2的依赖注入的，vue3中请使用provideLocal&injectLocal来保证更好的可读性
* @param defVal - 默认值
* */
export function createInjectDefaultClosure(defVal) {
    return {
        default: function () {
            return () => defVal
        }
    }
}

/***
 * @description 将数字序号转化为字母A/B/C...
 * @param {Number} index 从0开始的序号
 * @return {String} A,B,C...
 * */
export function numberToLetter(index) {
    return String.fromCharCode(65 + index)
}

export function numberToChinese(num) {
    const chineseDigits = ["零", "一", "二", "三", "四", "五", "六", "七", "八", "九"];
    const units = ["", "十", "百", "千", "万", "亿"];

    if (num === 0) {
        return "零";
    }

    let result = "";
    const numStr = String(num);
    const length = numStr.length;

    for (let i = 0; i < length; i++) {
        const digit = parseInt(numStr[i]);
        const unitIndex = length - i - 1;

        if (digit !== 0) {
            result += chineseDigits[digit] + units[unitIndex];
        } else {
            if (!result.endsWith("零")) {
                result += "零";
            }
        }
    }

    // 去掉多余的零
    result = result.replace(/零+$/, "");
    // 特殊处理 “一十”
    result = result.replace(/^一十/, "十");

    return result;
}

export const groupByObjectKey = (array, iteratee) => {
    // lodash的groupBy返回的是object, 只能用String/Number/Symbol作为键值，
    // 这是JS本身的特性决定的，如果要以object为键值，用Map当作容器比较合适。
    const result = new Map()
    array.forEach((item, index) => {
        const key = iteratee(item, index)
        const group = result.has(key) ? result.get(key) : []
        group.push(item)
        if (!result.has(key)) result.set(key, group)
    })
    return result
}