Ghost/core/frontend/services/theme-engine/i18n/i18n.js
Hannah Wolfe e1699afc77 Refactored i18n so all logic is in the base class
- preparation for moving the base class out of Ghost
- refactored so that all the logic for file loading and fallbacks live in the base class
- theme i18n now only overrides init with the properties it needs, filepath generation and error handling
- this makes it much easier to move the i18n file out, and eventually have theme i18n live elsewhere too
- also prepares for using DI for logging
2021-05-05 20:29:34 +01:00

71 lines
2.2 KiB
JavaScript

const errors = require('@tryghost/errors');
const i18n = require('../../../../shared/i18n');
const logging = require('../../../../shared/logging');
const config = require('../../../../shared/config');
class ThemeI18n extends i18n.I18n {
/**
* @param {objec} [options]
* @param {string} [locale] - a locale string
*/
constructor(options = {}) {
super(options);
// We don't care what gets passed in, themes use fulltext mode
this._stringMode = 'fulltext';
}
/**
* Setup i18n support for themes:
* - Load correct language file into memory
*
* @param {object} options
* @param {String} options.activeTheme - name of the currently loaded theme
* @param {String} options.locale - name of the currently loaded locale
*
*/
init({activeTheme, locale}) {
// This function is called during theme initialization, and when switching language or theme.
this._locale = locale || this._locale;
this._activetheme = activeTheme || 'casper';
super.init();
}
_translationFileDirs() {
return [config.getContentPath('themes'), this._activetheme, 'locales'];
}
_handleFallbackToDefault() {
logging.warn(`Theme translations falling back to locales/${this.defaultLocale()}.json.`);
}
_handleMissingFileError(locale) {
if (locale !== this.defaultLocale()) {
logging.warn(`Theme translations file locales/${locale}.json not found.`);
}
}
_handleInvalidFileError(locale, err) {
logging.error(new errors.IncorrectUsageError({
err,
message: `Theme translations unable to parse locales/${locale}.json. Please check that it is valid JSON.`
}));
}
_handleEmptyKeyError() {
logging.warn('Theme translations {{t}} helper called without a translation key.');
}
_handleMissingKeyError() {
// This case cannot be reached in themes as we use the key as the fallback
}
_handleInvalidKeyError(key, err) {
throw new errors.IncorrectUsageError({
err,
message: `Theme translations {{t}} helper called with an invalid translation key: ${key}`
});
}
}
module.exports = ThemeI18n;