81 lines
2.2 KiB
JavaScript
81 lines
2.2 KiB
JavaScript
import sizeOf from 'image-size'
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import fs from 'fs'
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import exif from 'exif'
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import sharp from 'sharp'
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import {UPLOAD_DIR, UPLOAD_URL} from './Dirs.js'
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const resizeImage = async (filename) => {
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if (!filename.toLowerCase().match(/\.(jpe?g|webp|png)$/)) {
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return
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}
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const imagePath = `${UPLOAD_DIR}/${filename}`
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const imageOutPath = `${UPLOAD_DIR}/r/${filename}`
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const orientation = await getExifOrientation(imagePath)
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let sharpImg = sharp(imagePath, { failOnError: false })
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// when image is rotated to the left or right, switch width/height
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// https://jdhao.github.io/2019/07/31/image_rotation_exif_info/
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if (orientation === 6) {
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sharpImg = sharpImg.rotate()
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} else if (orientation === 3) {
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sharpImg = sharpImg.rotate().rotate()
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} else if (orientation === 8) {
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sharpImg = sharpImg.rotate().rotate().rotate()
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}
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const sizes = [
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[150, 100],
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[375, 210],
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]
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for (let [w,h] of sizes) {
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console.log(w, h, imagePath)
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await sharpImg.resize(w, h, { fit: 'contain' }).toFile(`${imageOutPath}-${w}x${h}.webp`)
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}
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}
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async function getExifOrientation(imagePath) {
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return new Promise((resolve, reject) => {
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new exif.ExifImage({ image: imagePath }, function (error, exifData) {
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if (error) {
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resolve(0)
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} else {
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resolve(exifData.image.Orientation)
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}
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})
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})
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}
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const allImages = () => {
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const images = fs.readdirSync(UPLOAD_DIR)
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.filter(f => f.toLowerCase().match(/\.(jpe?g|webp|png)$/))
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.map(f => ({
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filename: f,
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file: `${UPLOAD_DIR}/${f}`,
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url: `${UPLOAD_URL}/${f}`,
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}))
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.sort((a, b) => {
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return fs.statSync(b.file).mtime.getTime() -
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fs.statSync(a.file).mtime.getTime()
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})
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return images
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}
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async function getDimensions(imagePath) {
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let dimensions = sizeOf(imagePath)
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const orientation = await getExifOrientation(imagePath)
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// when image is rotated to the left or right, switch width/height
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// https://jdhao.github.io/2019/07/31/image_rotation_exif_info/
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if (orientation === 6 || orientation === 8) {
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return {
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width: dimensions.height,
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height: dimensions.width,
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}
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}
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return dimensions
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}
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export default {
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allImages,
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resizeImage,
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getDimensions,
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}
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