142 lines
5.2 KiB
TypeScript
142 lines
5.2 KiB
TypeScript
import Decimal from 'decimal.js'
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/**
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* 加法计算
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* @param param1 当前值number或string
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* @param param2 当前值number或string
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* @param num 保留小数位数，默认小数2位
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* @param mode 舍入模式，1 向上取，2 向下取，3 四舍五入，默认3
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* @returns 返回处理后的数据
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*/
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export function accAdd(param1: number | string, param2: number | string, num = 2, mode = 3) {
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if (param1 === null || param1 === undefined || param1 === '') return param1
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if (param2 === null || param2 === undefined || param2 === '') return param2
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const temp = new Decimal(param1).add(new Decimal(param2))
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if (mode === 1) return temp.toFixed(num, Decimal.ROUND_UP)
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else if (mode === 2) return temp.toFixed(num, Decimal.ROUND_DOWN)
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else return temp.toFixed(num, Decimal.ROUND_HALF_UP)
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}
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/**
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* 减法计算
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* @param param1 当前值number或string
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* @param param2 当前值number或string
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* @param num 保留小数位数，默认小数2位
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* @param mode 舍入模式，1 向上取，2 向下取，3 四舍五入，默认3
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* @returns 返回处理后的数据
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*/
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export function accSub(param1: number | string, param2: number | string, num = 2, mode = 3) {
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if (param1 === null || param1 === undefined || param1 === '') return param1
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if (param2 === null || param2 === undefined || param2 === '') return param2
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const temp = new Decimal(param1).sub(new Decimal(param2))
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if (mode === 1) return temp.toFixed(num, Decimal.ROUND_UP)
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else if (mode === 2) return temp.toFixed(num, Decimal.ROUND_DOWN)
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else return temp.toFixed(num, Decimal.ROUND_HALF_UP)
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}
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/**
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* 乘法计算
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* @param param1 当前值number或string
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* @param param2 当前值number或string
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* @param num 保留小数位数，默认小数2位
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* @param mode 舍入模式，1 向上取，2 向下取，3 四舍五入，默认3
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* @returns 返回处理后的数据
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*/
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export function accMul(param1: number | string, param2: number | string, num = 2, mode = 3) {
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if (param1 === null || param1 === undefined || param1 === '') return param1
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if (param2 === null || param2 === undefined || param2 === '') return param2
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const temp = new Decimal(param1).mul(new Decimal(param2))
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if (mode === 1) return temp.toFixed(num, Decimal.ROUND_UP)
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else if (mode === 2) return temp.toFixed(num, Decimal.ROUND_DOWN)
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else return temp.toFixed(num, Decimal.ROUND_HALF_UP)
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}
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/**
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* 除法计算
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* @param param1 当前值number或string
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* @param param2 当前值number或string
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* @param num 保留小数位数，默认小数2位
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* @param mode 舍入模式，1 向上取，2 向下取，3 四舍五入，默认3
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* @returns 返回处理后的数据
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*/
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export function accDiv(param1: number | string, param2: number | string, num = 2, mode = 3) {
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if (param1 === null || param1 === undefined || param1 === '') return param1
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if (param2 === null || param2 === undefined || param2 === '' || param2.toString() === '0') return param2
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const temp = new Decimal(param1).div(new Decimal(param2))
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if (mode === 1) return temp.toFixed(num, Decimal.ROUND_UP)
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else if (mode === 2) return temp.toFixed(num, Decimal.ROUND_DOWN)
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else return temp.toFixed(num, Decimal.ROUND_HALF_UP)
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}
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/**
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* 数字格式化千分位显示
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* @param decimals 保留小数位数, 传-1则表示： 原数字有小数则保留两位小数，原数字没小数则为整数
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* @returns 返回处理后的数据字符串
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*/
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export const formatNumber = (value?: number, decimals = 0) => {
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if (!value) return 0
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if (decimals === -1) {
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decimals = value % 1 === 0 ? 0 : 2
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}
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return new Intl.NumberFormat('zh-CN', {
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minimumFractionDigits: decimals,
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maximumFractionDigits: decimals,
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}).format(value)
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}
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/***
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* 下载文件
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* @param url 文件地址
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* @param filename 文件名
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*/
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export const downloadFile = async (url: string, filename: string) => {
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if (!process.client) return;
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try {
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const response = await fetch(url);
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const reader = response.body.getReader();
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const contentLength = +response.headers.get('Content-Length');
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let receivedLength = 0;
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const stream = new ReadableStream({
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async start(controller) {
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while (true) {
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const { done, value } = await reader.read();
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if (done) {
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controller.close();
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return;
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}
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receivedLength += value.length;
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const progress = (receivedLength / contentLength * 100).toFixed(2);
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console.log(`下载进度: ${progress}%`);
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controller.enqueue(value);
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}
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}
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});
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const blob = await new Response(stream).blob();
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const objectURL = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = objectURL;
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a.download = filename || 'download';
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a.style.display = 'none';
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document.body.appendChild(a);
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a.click();
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URL.revokeObjectURL(objectURL);
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document.body.removeChild(a);
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} catch (error) {
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console.error('下载失败:', error);
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// 可添加错误提示逻辑
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}
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}
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/**
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* 判断传入的参数是否为数组
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* @param arr - 需要判断的参数
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* @returns {boolean} 如果参数是数组则返回true，否则返回false
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*/
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export const isArray = (arr: any) => { // 定义一个名为isArray的导出函数，接收任意类型的参数arr
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return Array.isArray(arr)
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} |