Messages: Load languages asynchronously.

Reduces the size of the initial app bundle by about half.

src/i18n/messages.js

@@ -7,34 +7,75 @@
 // sed -i -e "s/'//gm" -e 's/"/\\"/gm' -re 's/^( +)(.+?): ((.+?))?(,?)(\{?)$/\1"\2": "\4"/gm' -e 's/\"\{\"/{/g' -e 's/,"$/",/g' file.json
 // There's only problem that apostrophe character ' gets replaced by \\ so you have to fix it manually, sorry.
 
+const loaders = {
+  ar: () => import('./ar.json'),
+  ca: () => import('./ca.json'),
+  cs: () => import('./cs.json'),
+  de: () => import('./de.json'),
+  eo: () => import('./eo.json'),
+  es: () => import('./es.json'),
+  et: () => import('./et.json'),
+  eu: () => import('./eu.json'),
+  fi: () => import('./fi.json'),
+  fr: () => import('./fr.json'),
+  ga: () => import('./ga.json'),
+  he: () => import('./he.json'),
+  hu: () => import('./hu.json'),
+  it: () => import('./it.json'),
+  ja: () => import('./ja_pedantic.json'),
+  ja_easy: () => import('./ja_easy.json'),
+  ko: () => import('./ko.json'),
+  nb: () => import('./nb.json'),
+  nl: () => import('./nl.json'),
+  oc: () => import('./oc.json'),
+  pl: () => import('./pl.json'),
+  pt: () => import('./pt.json'),
+  ro: () => import('./ro.json'),
+  ru: () => import('./ru.json'),
+  te: () => import('./te.json'),
+  zh: () => import('./zh.json')
+}
+
 const messages = {
-  ar: require('./ar.json'),
-  ca: require('./ca.json'),
-  cs: require('./cs.json'),
-  de: require('./de.json'),
-  en: require('./en.json'),
-  eo: require('./eo.json'),
-  es: require('./es.json'),
-  et: require('./et.json'),
-  eu: require('./eu.json'),
-  fi: require('./fi.json'),
-  fr: require('./fr.json'),
-  ga: require('./ga.json'),
-  he: require('./he.json'),
-  hu: require('./hu.json'),
-  it: require('./it.json'),
-  ja: require('./ja_pedantic.json'),
-  ja_easy: require('./ja_easy.json'),
-  ko: require('./ko.json'),
-  nb: require('./nb.json'),
-  nl: require('./nl.json'),
-  oc: require('./oc.json'),
-  pl: require('./pl.json'),
-  pt: require('./pt.json'),
-  ro: require('./ro.json'),
-  ru: require('./ru.json'),
-  te: require('./te.json'),
-  zh: require('./zh.json')
+  languages: [
+    'ar',
+    'ca',
+    'cs',
+    'de',
+    'en',
+    'eo',
+    'es',
+    'et',
+    'eu',
+    'fi',
+    'fr',
+    'ga',
+    'he',
+    'hu',
+    'it',
+    'ja',
+    'ja_easy',
+    'ko',
+    'nb',
+    'nl',
+    'oc',
+    'pl',
+    'pt',
+    'ro',
+    'ru',
+    'te',
+    'zh'
+  ],
+  default: {
+    en: require('./en.json')
+  },
+  setLanguage: async (i18n, language) => {
+    if (loaders[language]) {
+      let messages = await loaders[language]()
+      i18n.setLocaleMessage(language, messages)
+    }
+    i18n.locale = language
+  }
 }
 
 export default messages