84 lines
2.5 KiB
JavaScript
84 lines
2.5 KiB
JavaScript
// Implementation of chrome.i18n.getMessage
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// https://developer.chrome.com/extensions/i18n#method-getMessage
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//
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// Does not implement predefined messages:
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// https://developer.chrome.com/extensions/i18n#overview-predefined
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const {ipcRenderer} = require('electron')
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const fs = require('fs')
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const path = require('path')
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let metadata
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const getExtensionMetadata = (extensionId) => {
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if (!metadata) {
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metadata = ipcRenderer.sendSync('CHROME_I18N_MANIFEST', extensionId)
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}
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return metadata
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}
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const getMessagesPath = (extensionId, language) => {
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const metadata = getExtensionMetadata(extensionId)
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const defaultLocale = metadata.default_locale || 'en'
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const localesDirectory = path.join(metadata.srcDirectory, '_locales')
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let messagesPath = path.join(localesDirectory, language, 'messages.json')
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if (!fs.statSyncNoException(messagesPath)) {
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messagesPath = path.join(localesDirectory, defaultLocale, 'messages.json')
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}
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return messagesPath
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}
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const getMessages = (extensionId, language) => {
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try {
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const messagesPath = getMessagesPath(extensionId, language)
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return JSON.parse(fs.readFileSync(messagesPath)) || {}
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} catch (error) {
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return {}
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}
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}
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const getLanguage = () => {
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return navigator.language.replace(/-.*$/, '').toLowerCase()
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}
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const replaceNumberedSubstitutions = (message, substitutions) => {
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return message.replace(/\$(\d+)/, (_, number) => {
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const index = parseInt(number, 10) - 1
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return substitutions[index] || ''
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})
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}
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const replacePlaceholders = (message, placeholders, substitutions) => {
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if (typeof substitutions === 'string') {
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substitutions = [substitutions]
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}
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if (!Array.isArray(substitutions)) {
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substitutions = []
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}
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if (placeholders) {
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Object.keys(placeholders).forEach((name) => {
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let {content} = placeholders[name]
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content = replaceNumberedSubstitutions(content, substitutions)
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message = message.replace(new RegExp(`\\$${name}\\$`, 'gi'), content)
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})
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}
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return replaceNumberedSubstitutions(message, substitutions)
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}
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const getMessage = (extensionId, messageName, substitutions) => {
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const messages = getMessages(extensionId, getLanguage())
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if (messages.hasOwnProperty(messageName)) {
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const {message, placeholders} = messages[messageName]
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return replacePlaceholders(message, placeholders, substitutions)
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}
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}
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exports.setup = (extensionId) => {
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return {
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getMessage (messageName, substitutions) {
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return getMessage(extensionId, messageName, substitutions)
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}
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}
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}
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