feat: solution for 'Повторный экзамен: FAQ-бот — ChromaDB + один MCP-tool'

src/middleware.js

@@ -0,0 +1,23 @@
+const moderate = require('moderate-censor');
+
+/**
+ * Moderates user input using moderate-censor.
+ * @param {string} text
+ * @returns {Promise<{allowed: boolean, reasons: string[]}>}
+ */
+async function moderateInput(text) {
+  try {
+    const result = await moderate.moderate(text);
+    if (result.isAllowed) {
+      return { allowed: true, reasons: [] };
+    } else {
+      return { allowed: false, reasons: result.reasons || [] };
+    }
+  } catch (err) {
+    console.error('Moderation error:', err);
+    // If moderation fails, default to allowing to avoid blocking legitimate queries
+    return { allowed: true, reasons: [] };
+  }
+}
+
+module.exports = { moderateInput };