61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
module.exports = {
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formatTime(date) {
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const year = date.getFullYear()
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const month = date.getMonth() + 1
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const day = date.getDate()
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const hour = date.getHours()
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const minute = date.getMinutes()
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const second = date.getSeconds()
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return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(
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':')
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},
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formatDate(date) {
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const year = date.getFullYear()
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const month = date.getMonth() + 1
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const day = date.getDate()
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return [year, month, day].map(formatNumber).join('-')
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},
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formatNumber(n) {
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n = n.toString()
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return n[1] ? n : '0' + n
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},
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compress(base64String, w, quality) {
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var getMimeType = (urlData) => {
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var arr = urlData.split(",");
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var mime = arr[0].match(/:(.*?);/)[1];
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// return mime.replace("image/", "");
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return mime;
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};
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var newImage = new Image();
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var imgWidth, imgHeight;
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var promise = new Promise((resolve) => (newImage.onload = resolve));
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newImage.src = base64String;
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return promise.then(() => {
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imgWidth = newImage.width;
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imgHeight = newImage.height;
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var canvas = document.createElement("canvas");
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var ctx = canvas.getContext("2d");
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if (Math.max(imgWidth, imgHeight) > w) {
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if (imgWidth > imgHeight) {
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canvas.width = w;
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canvas.height = (w * imgHeight) / imgWidth;
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} else {
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canvas.height = w;
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canvas.width = (w * imgWidth) / imgHeight;
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}
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} else {
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canvas.width = imgWidth;
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canvas.height = imgHeight;
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}
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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ctx.drawImage(newImage, 0, 0, canvas.width, canvas.height);
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var base64 = canvas.toDataURL(getMimeType(base64String), quality);
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return base64;
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});
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}
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} |