1 files changed, 45 insertions, 0 deletions
diff --git a/ui/i18n-helper.js b/ui/i18n-helper.js
new file mode 100644
index 000000000..3ce24ddfb
--- /dev/null
+++ b/ui/i18n-helper.js
@@ -0,0 +1,45 @@
+// cross-browser connection to extension i18n API
+const log = require('loglevel')
+
+const getMessage = (locale, key, substitutions) => {
+  // check locale is loaded
+  if (!locale) {
+    // throw new Error('Translator - has not loaded a locale yet.')
+    return ''
+  }
+  // check entry is present
+  const { current, en } = locale
+  const entry = current[key] || en[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
+}
+
+function fetchLocale (localeName) {
+  return new Promise((resolve, reject) => {
+    return fetch(`/_locales/${localeName}/messages.json`)
+      .then(response => response.json())
+      .then(
+        locale => resolve(locale),
+        error => {
+          log.error(`failed to fetch ${localeName} locale because of ${error}`)
+          resolve({})
+        }
+      )
+  })
+}
+
+module.exports = {
+  getMessage,
+  fetchLocale,
+}