64 lines
1.9 KiB
JavaScript
64 lines
1.9 KiB
JavaScript
/* eslint-disable no-undef */
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import path from 'path';
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import fs from 'fs';
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import sharp from "sharp";
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import { mkdir } from './file.js'
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export default class Background {
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#backgroundFolder
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#backgroundOutputFolder
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#extractFolder
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#files
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constructor(shareDir, targetDir) {
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this.#backgroundFolder = path.join(shareDir, __config.folder.background);
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this.#backgroundOutputFolder = path.join(targetDir, `_${__config.folder.background}`);
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this.#extractFolder = path.join(this.#backgroundFolder, 'extracted');
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mkdir(this.#backgroundOutputFolder);
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}
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async process() {
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this.#files = fs.readdirSync(this.#extractFolder).filter((f) => {
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return f.endsWith('.png') && f.includes('_left');
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})
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await Promise.all(this.#files.map(async (f) => {
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const filenamePrefix = path.parse(f).name.replace('_left', '');
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await this.#composite(filenamePrefix, '.png');
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}))
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}
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async #composite(filenamePrefix, fileExt) {
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const image = sharp(path.join(this.#extractFolder, `${filenamePrefix}_left${fileExt}`))
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const metadata = await image.metadata()
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image
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.resize(2 * metadata.width, metadata.height, {
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kernel: sharp.kernel.nearest,
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fit: 'contain',
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position: 'left top',
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background: { r: 255, g: 255, b: 255, alpha: 0 }
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})
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.composite([
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{
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input: path.join(this.#extractFolder, `${filenamePrefix}_right${fileExt}`),
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top: 0,
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left: metadata.width,
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},
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])
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.toFile(path.join(this.#backgroundOutputFolder, `${filenamePrefix}${fileExt}`));
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}
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get files() {
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return this.#files.map(f => f.replace('_left', ''))
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}
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getFilesToCopy(publicAssetsDir) {
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return this.#files.map((f) => {
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return {
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filename: f.replace('_left', ''),
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source: path.join(this.#backgroundOutputFolder),
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target: path.join(publicAssetsDir, __config.folder.background)
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};
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})
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}
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} |