Big Bang

app/routing/middleware/util/Config.middleware.js

@@ -0,0 +1,40 @@
+/*
+ * Config Middleware
+ * -------------------------------------------------------------
+ * Checks the specified configuration key (and optionally the value).
+ * If the configuration matches the required value, the request can
+ * proceed. Otherwise, a 404 will be returned.
+ *
+ * To use, add the call to your route's middleware:
+ *  _flitter.mw('util:Config', {
+ *      key: 'server.environment',
+ *      value: 'development'
+ *  })
+ *
+ * In this case, the request would be allowed to proceed in the case:
+ *  _flitter.config('server.environment') === 'development'
+ *
+ * The 'value' attribute is optional. If none is provided, the request
+ * can proceed if the config value is truthy.
+ */
+const Middleware = require('libflitter/middleware/Middleware')
+class Config extends Middleware {
+    static get services() {
+        return [...super.services, 'configs']
+    }
+
+    /*
+     * Run the middleware test.
+     */
+    test(req, res, next, args = {}){
+        if ( !args.key ) return res.error(500)
+
+        const config = this.configs.get(args.key)
+
+        if ( !args.value && !config ) return res.error(404)
+        else if ( args.value && args.value !== config ) return res.error(404)
+        else return next()
+    }
+}
+
+module.exports = Config