Start client-side locale support

app/controllers/api/v1/Locale.controller.js

@@ -0,0 +1,44 @@
+const { Controller } = require('libflitter')
+
+class LocaleController extends Controller {
+    static get services() {
+        return [...super.services, 'locale']
+    }
+
+    async resolve(req, res, next) {
+        try {
+            return res.api(req.T(req.params.resolver))
+        } catch (e) {
+            return res.status(400)
+                .message(req.T('common.invalid_resolver'))
+                .api()
+        }
+    }
+
+    async load_module(req, res, next) {
+        const resolver = `${req.i18n.region()}:${req.params.resolver}`
+        try {
+            return res.api(this.locale.get(resolver))
+        } catch (e) {
+            return res.status(400)
+                .message(req.T('common.invalid_resolver'))
+                .api()
+        }
+    }
+
+    async batch_resolve(req, res, next) {
+        if ( !req.body.resolvers || !Array.isArray(req.body.resolvers) )
+            return res.status(400)
+                .message(`${req.T('api.improper_field')} resolvers ${req.T('api.array')}`)
+                .api()
+
+        const translation_map = {}
+        for ( const resolve of req.body.resolvers ) {
+            translation_map[resolve] = req.T(resolve)
+        }
+
+        return res.api(translation_map)
+    }
+}
+
+module.exports = exports = LocaleController