first commit

backend/models/FeedSackColumnConfig.js

@@ -0,0 +1,31 @@
+const { query } = require('../database/db');
+
+class FeedSackColumnConfig {
+    static async get() {
+        const result = await query('SELECT config FROM feed_sack_column_config ORDER BY id LIMIT 1');
+        if (result.rows.length === 0) return null;
+        return result.rows[0].config;
+    }
+
+    static async save(config) {
+        // Check if a row exists
+        const existing = await query('SELECT id FROM feed_sack_column_config LIMIT 1');
+        if (existing.rows.length === 0) {
+            // Insert
+            const result = await query(
+                'INSERT INTO feed_sack_column_config (config) VALUES ($1) RETURNING config',
+                [JSON.stringify(config)]
+            );
+            return result.rows[0].config;
+        } else {
+            // Update the existing row
+            const result = await query(
+                'UPDATE feed_sack_column_config SET config = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2 RETURNING config',
+                [JSON.stringify(config), existing.rows[0].id]
+            );
+            return result.rows[0].config;
+        }
+    }
+}
+
+module.exports = FeedSackColumnConfig;