aida_front/src/tool/util.js

const isEmail = (email) => {
	let reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/
	let result = reg.test(email)
	return result
}

const getUploadUrl = () => {
	let url = process.env.VUE_APP_BASE_URL || ''
	// let url = "http://18.167.251.121:10086"
	return url
}

function dataURLtoBlob(dataurl) {
	var arr = dataurl.split(',');
	var mime = arr[0].match(/:(.*?);/)[1];
	var bstr = atob(arr[1]);
	var n = bstr.length;
	var u8arr = new Uint8Array(n);
	while (n--) {
		u8arr[n] = bstr.charCodeAt(n);
	}
	return new Blob([u8arr], { type: mime });
}

function blobToFile(blob, fileName) {
	blob.lastModifiedDate = new Date();
	blob.name = fileName;
	return blob;
}

//下载图片
function downloadIamge(imgsrc, name) { // 下载图片地址和图片名
	var image = new Image()
	// 解决跨域 Canvas 污染问题
	image.setAttribute('crossOrigin', 'anonymous')
	image.onload = function () {
		var canvas = document.createElement('canvas')
		canvas.width = image.width
		canvas.height = image.height
		var context = canvas.getContext('2d')
		context.drawImage(image, 0, 0, image.width, image.height)
		var url = canvas.toDataURL('image/jpeg') // 得到图片的base64编码数据
		var a = document.createElement('a') // 生成一个a元素
		var event = new MouseEvent('click') // 创建一个单击事件
		a.download = name || 'generate' // 设置图片名称
		a.href = url // 将生成的URL设置为a.href属性
		a.target = '_blank'
		a.dispatchEvent(event) // 触发a的单击事件
	}
	image.src = imgsrc
}

function dataURLtoFile(dataurl, filename) {
	var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
		bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
	while (n--) {
		u8arr[n] = bstr.charCodeAt(n);
	}
	var blob = dataURLtoBlob(dataurl);
	return blobToFile(blob, filename);
}

const base64toFile = (dataurl, filename = 'file') => {
	let arr = dataurl.split(',')
	let mime = arr[0].match(/:(.*?);/)[1]
	let suffix = mime.split('/')[1]
	let bstr = atob(arr[1])
	let n = bstr.length
	let u8arr = new Uint8Array(n)
	while (n--) {
		u8arr[n] = bstr.charCodeAt(n)
	}
	return new File([u8arr], `${filename}.${suffix}`, {
		type: mime
	})

}

function rgbToHsv([R, G, B]) {
	R /= 255
	G /= 255
	B /= 255
	const max = Math.max(R, G, B)
	const min = Math.min(R, G, B)
	const delta = max - min
	var H, S, V
	if (delta === 0) {
		H = 0;
	} else if (max === R) {
		H = ((G - B) / delta) % 6;
	} else if (max === G) {
		H = (B - R) / delta + 2;
	} else { // max === B
		H = (R - G) / delta + 4;
	}
	H = Math.round(H * 60); // 范围为 0-360
	if (H < 0) {
		H = 360 + H
	}
	if (max === 0) {
		S = 0;
	} else {
		S = delta / max;
	}
	S = Math.round(S * 100); // 范围为 0-100
	V = Math.round(max * 100); // 范围为 0-100
	return [H, S, V]
}

const formatTime = (timestamp, fmt) => {
	// date = new Date(), fmt = 'MM/dd/yyyy';
	let date = new Date();
	date.setTime(timestamp * 1000);

	if (!fmt) {
		formatRule ? (fmt = formatRule) : (fmt = "YYYY-MM-DD hh:mm:ss");
	}
	// console.log(formatRule)
	let o = {
		'M+': date.getMonth() + 1, // 月份
		'D+': date.getDate(), // 日
		'h+': date.getHours(), // 小时
		'm+': date.getMinutes(), // 分
		's+': date.getSeconds(), // 秒
		'q+': Math.floor((date.getMonth() + 3) / 3), // 季度
		'S+': date.getMilliseconds(), // 毫秒
		'a': date.getHours() > 12
			? 'PM'
			: 'AM' // 上午还是下午
	};
	if (/(Y+)/.test(fmt)) {
		fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
	}
	if (/(a)/.test(fmt) && o['h+'] > 12) {
		o['h+'] = o['h+'] - 12
	}
	for (let k in o) {
		if (new RegExp('(' + k + ')').test(fmt)) {
			fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1)
				? (o[k])
				: (('00' + o[k]).substr(('' + o[k]).length)));
		}
	}

	return fmt;
}

const isMoible = () => {
	let is_mobile = navigator.userAgent.toLowerCase().match(/(ipad|ipod|iphone|android|coolpad|mmp|smartphone|midp|wap|xoom|symbian|j2me|blackberry|wince)/i) != null;
	if (is_mobile) {
		return true
	} else {
		return false
	}
}


function getBrowserInfo() {//获取是什么浏览器
	var agent = navigator.userAgent.toLowerCase();
	var userAgent = navigator.userAgent; 
	var regStr_ie = /msie [\d.]+;/gi;
	var regStr_ff = /firefox\/[\d.]+/gi
	var regStr_chrome = /chrome\/[\d.]+/gi;
	var regStr_saf = /safari\/[\d.]+/gi;
	var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1; //判断是否IE<11浏览器 
	var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器  
	console.log(isIE,isEdge);
	//IE
	if (agent.indexOf("msie") > 0) {
		return agent.match(regStr_ie);
	}
	//firefox
	if (agent.indexOf("firefox") > 0) {
		return agent.match(regStr_ff);
	}
	//Chrome
	if (agent.indexOf("chrome") > 0) {
		return agent.match(regStr_chrome);
	}
	//Safari
	if (agent.indexOf("safari") > 0 && agent.indexOf("chrome") < 0) {
		return agent.match(regStr_saf);
	}
}
export {
	isEmail,
	getUploadUrl,
	dataURLtoFile,
	blobToFile,
	base64toFile,
	rgbToHsv,
	formatTime,
	dataURLtoBlob,
	isMoible,
	downloadIamge,
	getBrowserInfo,
}