created API For Aplication Absensi

app/helpers/updateBalance.js

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+
+const db = require('../../../../models/migration')
+const Balance = db.Balance
+
+async function updateBalance(user_id, type, amount, t) {
+    if (!['income', 'expanse', 'debt', 'receivable'].includes(type)) return;
+
+    const [balance, created] = await Balance.findOrCreate({
+        where: { user_id, type },
+        defaults: { amount: 0 },
+        transaction: t,
+    });
+
+    const operation = type === 'expanse' ? -1 : 1;
+
+    await balance.increment('amount', {
+        by: amount * operation,
+        transaction: t
+    });
+
+    await balance.reload({ transaction: t });
+}