60 lines
2 KiB
TypeScript
60 lines
2 KiB
TypeScript
// 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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import * as ipcRendererUtils from '@electron/internal/renderer/ipc-renderer-internal-utils'
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interface Placeholder {
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content: string;
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example?: string;
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}
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const getMessages = (extensionId: number) => {
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try {
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const data = ipcRendererUtils.invokeSync<string>('CHROME_GET_MESSAGES', extensionId)
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return JSON.parse(data) || {}
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} catch {
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return {}
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}
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}
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const replaceNumberedSubstitutions = (message: string, substitutions: string[]) => {
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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: string, placeholders: Record<string, Placeholder>, substitutions: string[] | string) => {
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if (typeof substitutions === 'string') substitutions = [substitutions]
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if (!Array.isArray(substitutions)) substitutions = []
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if (placeholders) {
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Object.keys(placeholders).forEach((name: string) => {
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let { content } = placeholders[name]
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const substitutionsArray = Array.isArray(substitutions) ? substitutions : []
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content = replaceNumberedSubstitutions(content, substitutionsArray)
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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: number, messageName: string, substitutions: string[]) => {
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const messages = getMessages(extensionId)
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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: number) => {
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return {
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getMessage (messageName: string, substitutions: string[]) {
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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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