first commit

backend/models/CycleFeedInitialBalance.js

@@ -0,0 +1,51 @@
+const { query } = require('../database/db');
+
+class CycleFeedInitialBalance {
+    /**
+     * Get initial balance for a specific cycle
+     * @param {string} cycleId - Cycle ID
+     * @returns {Promise<Object|null>} Initial balance record or null if not found
+     */
+    static async getByCycleId(cycleId) {
+        const result = await query(
+            'SELECT * FROM cycle_feed_initial_balance WHERE cycle_id = $1',
+            [cycleId]
+        );
+        return result.rows[0] || null;
+    }
+
+    /**
+     * Insert or update initial balance for a cycle (upsert)
+     * @param {string} cycleId - Cycle ID
+     * @param {number} saldoAwal - Initial balance count (must be non-negative)
+     * @param {string} createdBy - Username of creator
+     * @returns {Promise<Object>} Created/updated initial balance record
+     */
+    static async upsert(cycleId, saldoAwal, createdBy) {
+        const result = await query(
+            `INSERT INTO cycle_feed_initial_balance (cycle_id, saldo_awal, created_by)
+             VALUES ($1, $2, $3)
+             ON CONFLICT (cycle_id)
+             DO UPDATE SET
+                saldo_awal = $2,
+                updated_at = CURRENT_TIMESTAMP
+             RETURNING *`,
+            [cycleId, saldoAwal, createdBy]
+        );
+        return result.rows[0];
+    }
+
+    /**
+     * Delete initial balance for a cycle
+     * @param {string} cycleId - Cycle ID
+     * @returns {Promise<void>}
+     */
+    static async delete(cycleId) {
+        await query(
+            'DELETE FROM cycle_feed_initial_balance WHERE cycle_id = $1',
+            [cycleId]
+        );
+    }
+}
+
+module.exports = CycleFeedInitialBalance;