feat: creates backend for the project

backend/src/routes/transactions.ts

@@ -0,0 +1,54 @@
+import { Router } from 'express';
+import { asyncHandler } from '../utils';
+import * as transactionService from '../services/transactions';
+
+const router = Router();
+
+router.get(
+  '/',
+  asyncHandler(async (req, res) => {
+    const q = req.query;
+    const result = await transactionService.getTransactions({
+      accountId: q.accountId ? Number(q.accountId) : undefined,
+      from: q.from as string | undefined,
+      to: q.to as string | undefined,
+      direction: q.direction as string | undefined,
+      categoryId: q.categoryId ? Number(q.categoryId) : undefined,
+      search: q.search as string | undefined,
+      amountMin: q.amountMin ? Number(q.amountMin) : undefined,
+      amountMax: q.amountMax ? Number(q.amountMax) : undefined,
+      onlyUnconfirmed: q.onlyUnconfirmed === 'true',
+      sortBy: q.sortBy as 'date' | 'amount' | undefined,
+      sortOrder: q.sortOrder as 'asc' | 'desc' | undefined,
+      page: q.page ? Number(q.page) : undefined,
+      pageSize: q.pageSize ? Number(q.pageSize) : undefined,
+    });
+    res.json(result);
+  }),
+);
+
+router.put(
+  '/:id',
+  asyncHandler(async (req, res) => {
+    const id = Number(req.params.id);
+    if (isNaN(id)) {
+      res.status(400).json({ error: 'BAD_REQUEST', message: 'Invalid transaction id' });
+      return;
+    }
+
+    const { categoryId, comment } = req.body;
+    if (categoryId === undefined && comment === undefined) {
+      res.status(400).json({ error: 'BAD_REQUEST', message: 'No fields to update' });
+      return;
+    }
+
+    const result = await transactionService.updateTransaction(id, { categoryId, comment });
+    if (!result) {
+      res.status(404).json({ error: 'NOT_FOUND', message: 'Transaction not found' });
+      return;
+    }
+    res.json(result);
+  }),
+);
+
+export default router;