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// cross-browser connection to extension i18n API
const log = require('loglevel')
/**
* Returns a localized message for the given key
* @param {object} locale The locale
* @param {string} key The message key
* @param {string[]} substitutions A list of message substitution replacements
* @return {null|string} The localized message
*/
const getMessage = (locale, key, substitutions) => {
if (!locale) {
return null
}
if (!locale[key]) {
log.warn(`Translator - Unable to find value for key "${key}"`)
return null
}
const entry = locale[key]
let phrase = entry.message
// perform substitutions
if (substitutions && substitutions.length) {
substitutions.forEach((substitution, index) => {
const regex = new RegExp(`\\$${index + 1}`, 'g')
phrase = phrase.replace(regex, substitution)
})
}
return phrase
}
async function fetchLocale (localeName) {
try {
const response = await fetch(`./_locales/${localeName}/messages.json`)
return await response.json()
} catch (error) {
log.error(`failed to fetch ${localeName} locale because of ${error}`)
return {}
}
}
module.exports = {
getMessage,
fetchLocale,
}
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