Add warning system, role management, and guessing game

services/warnings.js

@@ -0,0 +1,42 @@
+const { connectToDatabase } = require('../db');
+
+const WARNING_COLLECTION = 'warnings';
+
+const getWarningsCollection = async () => {
+    const client = await connectToDatabase();
+    return client.db('discord').collection(WARNING_COLLECTION);
+};
+
+const addWarning = async ({ guildId, userId, moderatorId, reason }) => {
+    const collection = await getWarningsCollection();
+    const warningEntry = {
+        reason,
+        moderatorId,
+        createdAt: new Date(),
+    };
+
+    const result = await collection.findOneAndUpdate(
+        { guildId, userId },
+        {
+            $push: { warnings: warningEntry },
+            $setOnInsert: { guildId, userId },
+        },
+        { upsert: true, returnDocument: 'after' },
+    );
+
+    const warnings = result.value?.warnings ?? [];
+
+    return { warnings, warningEntry };
+};
+
+const getWarnings = async ({ guildId, userId }) => {
+    const collection = await getWarningsCollection();
+    const record = await collection.findOne({ guildId, userId });
+
+    return record?.warnings ?? [];
+};
+
+module.exports = {
+    addWarning,
+    getWarnings,
+};