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src/api/routes/account.js

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+import * as db from '../../db/account.js';
+
+function requireSelectedCompany(req) {
+    const companyId = req.user?.selectedCompanyId;
+    if (companyId == null) {
+        return { error: 'No company selected' };
+    }
+    return { companyId };
+}
+
+function parsePositiveInt(value, field) {
+    const id = Number(value);
+    if (!Number.isInteger(id) || id <= 0) {
+        return { error: `${field} is required` };
+    }
+    return { id };
+}
+
+function accountErrorStatus(error) {
+    if (error.message === 'No company selected') return 400;
+    if (error.message === 'Not authorized') return 403;
+    if (error.message?.endsWith(' not found')) return 404;
+    if (error.message?.endsWith(' required')) return 400;
+    return 500;
+}
+
+/**
+ * Registers account routes for the authenticated user's selected company.
+ * @param {import('express').Application} app
+ * @param {string} [basePath='']
+ */
+export function register(app, basePath = '') {
+    /**
+     * @openapi
+     * /account:
+     *   get:
+     *     tags: [Account]
+     *     summary: List accounts
+     *     description: Lists payment accounts for the selected company.
+     *     security:
+     *       - cookieAuth: []
+     *     responses:
+     *       200:
+     *         description: List of accounts
+     *         content:
+     *           application/json:
+     *             schema:
+     *               type: object
+     *               properties:
+     *                 accounts:
+     *                   type: array
+     *                   items:
+     *                     $ref: '#/components/schemas/Account'
+     *       400:
+     *         description: No company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     */
+    app.get(`${basePath}/account`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        try {
+            const accounts = await db.list(req.user.id);
+            res.status(200).json({ accounts });
+        } catch (error) {
+            const status = accountErrorStatus(error);
+            if (status === 500) console.error('List accounts failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+
+    /**
+     * @openapi
+     * /account:
+     *   post:
+     *     tags: [Account]
+     *     summary: Create account
+     *     description: Creates a payment account for the selected company.
+     *     security:
+     *       - cookieAuth: []
+     *     requestBody:
+     *       required: true
+     *       content:
+     *         application/json:
+     *           schema:
+     *             type: object
+     *             required: [type, name]
+     *             properties:
+     *               type:
+     *                 type: string
+     *               name:
+     *                 type: string
+     *     responses:
+     *       201:
+     *         description: Created account
+     *         content:
+     *           application/json:
+     *             schema:
+     *               type: object
+     *               properties:
+     *                 account:
+     *                   $ref: '#/components/schemas/Account'
+     *       400:
+     *         description: Validation error or no company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       403:
+     *         description: Not authorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     */
+    app.post(`${basePath}/account`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        try {
+            const account = await db.create(req.user.id, req.body ?? {});
+            res.status(201).json({ account });
+        } catch (error) {
+            const status = accountErrorStatus(error);
+            if (status === 500) console.error('Create account failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+
+    /**
+     * @openapi
+     * /account/{id}:
+     *   delete:
+     *     tags: [Account]
+     *     summary: Delete account
+     *     description: Deletes an account of the selected company. Its payments are removed as well.
+     *     security:
+     *       - cookieAuth: []
+     *     parameters:
+     *       - in: path
+     *         name: id
+     *         required: true
+     *         schema:
+     *           type: integer
+     *         description: Account ID
+     *     responses:
+     *       204:
+     *         description: Account deleted
+     *       400:
+     *         description: Invalid ID or no company selected
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       401:
+     *         description: Unauthorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       403:
+     *         description: Not authorized
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     *       404:
+     *         description: Account not found
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
+     */
+    app.delete(`${basePath}/account/:id`, async (req, res) => {
+        const selected = requireSelectedCompany(req);
+        if (selected.error) {
+            return res.status(400).json({ error: selected.error });
+        }
+
+        const parsedId = parsePositiveInt(req.params.id, 'id');
+        if (parsedId.error) {
+            return res.status(400).json({ error: parsedId.error });
+        }
+
+        try {
+            await db.remove(req.user.id, parsedId.id);
+            res.status(204).end();
+        } catch (error) {
+            const status = accountErrorStatus(error);
+            if (status === 500) console.error('Delete account failed:', error);
+            res.status(status).json({ error: error.message });
+        }
+    });
+}