1 files changed, 44 insertions, 0 deletions
diff --git a/ui/app/helpers/utils/i18n-helper.js b/ui/app/helpers/utils/i18n-helper.js
new file mode 100644
index 000000000..db07049e1
--- /dev/null
+++ b/ui/app/helpers/utils/i18n-helper.js
@@ -0,0 +1,44 @@
+// 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,
+}