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// cross-browser connection to extension i18n API
const extension = require('extensionizer')
const log = require('loglevel')
class Translator {
async setLocale(localeName) {
this.localeName = localeName
this.locale = await fetchLocale(localeName)
}
getMessage (key, substitutions) {
// check locale is loaded
if (!this.locale) {
throw new Error('Translator - has not loaded a locale yet')
}
// check entry is present
const entry = this.locale[key]
if (!entry) {
log.error(`Translator - Unable to find value for "${key}"`)
throw new Error(`Translator - Unable to find value for "${key}"`)
}
let phrase = entry.message
// perform substitutions
if (substitutions && substitutions.length) {
phrase = phrase.replace(/\$1/g, substitutions[0])
if (substitutions.length > 1) {
phrase = phrase.replace(/\$2/g, substitutions[1])
}
}
return phrase
}
}
async function fetchLocale (localeName) {
const response = await fetch(`/_locales/${localeName}/messages.json`)
const locale = await response.json()
return locale
}
module.exports = Translator
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