97 lines
2.7 KiB
JavaScript
97 lines
2.7 KiB
JavaScript
const { existsSync, readFileSync } = require('fs')
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const { brotliCompressSync, constants } = require('zlib')
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const { load: loadYaml } = require('js-yaml')
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class ProcessLocalesPlugin {
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constructor(options = {}) {
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this.compress = !!options.compress
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if (typeof options.inputDir !== 'string') {
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throw new Error('ProcessLocalesPlugin: no input directory `inputDir` specified.')
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} else if (!existsSync(options.inputDir)) {
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throw new Error('ProcessLocalesPlugin: the specified input directory does not exist.')
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}
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this.inputDir = options.inputDir
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if (typeof options.outputDir !== 'string') {
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throw new Error('ProcessLocalesPlugin: no output directory `outputDir` specified.')
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}
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this.outputDir = options.outputDir
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this.localeNames = []
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this.loadLocales()
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}
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apply(compiler) {
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compiler.hooks.thisCompilation.tap('ProcessLocalesPlugin', (compilation) => {
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const { RawSource } = compiler.webpack.sources;
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compilation.hooks.processAssets.tapPromise({
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name: 'process-locales-plugin',
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stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONAL
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},
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async (_assets) => {
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const promises = []
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for (const { locale, data } of this.locales) {
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promises.push(new Promise((resolve) => {
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if (Object.prototype.hasOwnProperty.call(data, 'Locale Name')) {
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delete data['Locale Name']
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}
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let filename = `${this.outputDir}/${locale}.json`
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let output = JSON.stringify(data)
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if (this.compress) {
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filename += '.br'
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output = this.compressLocale(output)
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}
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compilation.emitAsset(
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filename,
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new RawSource(output),
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{ minimized: true }
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)
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resolve()
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}))
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}
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await Promise.all(promises)
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this.locales = null
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})
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})
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}
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loadLocales() {
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this.locales = []
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const activeLocales = JSON.parse(readFileSync(`${this.inputDir}/activeLocales.json`))
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for (const locale of activeLocales) {
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const contents = readFileSync(`${this.inputDir}/${locale}.yaml`, 'utf-8')
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const data = loadYaml(contents)
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this.localeNames.push(data['Locale Name'] ?? locale)
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this.locales.push({ locale, data })
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}
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}
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compressLocale(data) {
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const buffer = Buffer.from(data, 'utf-8')
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return brotliCompressSync(buffer, {
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params: {
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[constants.BROTLI_PARAM_MODE]: constants.BROTLI_MODE_TEXT,
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[constants.BROTLI_PARAM_QUALITY]: constants.BROTLI_MAX_QUALITY,
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[constants.BROTLI_PARAM_SIZE_HINT]: buffer.byteLength
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}
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})
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}
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}
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module.exports = ProcessLocalesPlugin
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