122 lines
3.9 KiB
JavaScript
122 lines
3.9 KiB
JavaScript
const express = require('express');
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const router = express.Router();
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const { getDb } = require('../db/database');
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const { standardizeError } = require('../middleware/errorFormatter');
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const { calculateSnowball, calculateAvalanche } = require('../services/snowballService');
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const DEBT_LIKE_CLAUSES = `(
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b.snowball_include = 1
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OR (
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COALESCE(b.snowball_exempt, 0) = 0
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AND (
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LOWER(c.name) LIKE '%credit%'
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OR LOWER(c.name) LIKE '%loan%'
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OR LOWER(c.name) LIKE '%mortgage%'
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OR LOWER(c.name) LIKE '%housing%'
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OR LOWER(c.name) LIKE '%debt%'
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)
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)
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)`;
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// GET /api/snowball — server-filtered debt bills, pre-sorted by snowball_order
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router.get('/', (req, res) => {
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const db = getDb();
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const bills = db.prepare(`
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SELECT b.*, c.name AS category_name
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FROM bills b
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LEFT JOIN categories c ON b.category_id = c.id AND c.user_id = b.user_id
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WHERE b.user_id = ?
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AND b.active = 1
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AND ${DEBT_LIKE_CLAUSES}
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ORDER BY
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CASE WHEN b.snowball_order IS NULL THEN 1 ELSE 0 END ASC,
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b.snowball_order ASC,
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CASE WHEN b.current_balance IS NULL THEN 1 ELSE 0 END ASC,
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b.current_balance ASC
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`).all(req.user.id);
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res.json(bills);
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});
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// GET /api/snowball/settings — extra monthly payment for this user
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router.get('/settings', (req, res) => {
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const db = getDb();
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const user = db.prepare('SELECT snowball_extra_payment FROM users WHERE id = ?').get(req.user.id);
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res.json({ extra_payment: user?.snowball_extra_payment ?? 0 });
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});
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// PATCH /api/snowball/settings — save extra monthly payment
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router.patch('/settings', (req, res) => {
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const { extra_payment } = req.body;
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let val = 0;
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if (extra_payment !== undefined && extra_payment !== null && extra_payment !== '') {
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val = parseFloat(extra_payment);
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if (!Number.isFinite(val) || val < 0) {
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return res.status(400).json(standardizeError(
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'extra_payment must be a non-negative number',
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'VALIDATION_ERROR',
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'extra_payment'
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));
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}
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}
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const db = getDb();
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db.prepare('UPDATE users SET snowball_extra_payment = ? WHERE id = ?').run(val, req.user.id);
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res.json({ extra_payment: val });
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});
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// GET /api/snowball/projection — payoff timeline using the snowball math service
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router.get('/projection', (req, res) => {
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const db = getDb();
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const bills = db.prepare(`
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SELECT b.*, c.name AS category_name
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FROM bills b
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LEFT JOIN categories c ON b.category_id = c.id AND c.user_id = b.user_id
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WHERE b.user_id = ?
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AND b.active = 1
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AND ${DEBT_LIKE_CLAUSES}
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ORDER BY
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CASE WHEN b.snowball_order IS NULL THEN 1 ELSE 0 END ASC,
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b.snowball_order ASC,
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CASE WHEN b.current_balance IS NULL THEN 1 ELSE 0 END ASC,
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b.current_balance ASC
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`).all(req.user.id);
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const user = db.prepare('SELECT snowball_extra_payment FROM users WHERE id = ?').get(req.user.id);
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const extraPayment = user?.snowball_extra_payment ?? 0;
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const now = new Date();
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const snowball = calculateSnowball(bills, extraPayment, now);
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const avalanche = calculateAvalanche(bills, extraPayment, now);
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res.json({ snowball, avalanche });
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});
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// PATCH /api/snowball/order — batch-save snowball_order positions
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router.patch('/order', (req, res) => {
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const items = req.body;
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if (!Array.isArray(items)) {
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return res.status(400).json(standardizeError('Request body must be an array', 'VALIDATION_ERROR'));
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}
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const db = getDb();
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const userId = req.user.id;
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const update = db.prepare('UPDATE bills SET snowball_order = ? WHERE id = ? AND user_id = ?');
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db.transaction((rows) => {
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for (const row of rows) {
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const id = parseInt(row.id, 10);
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const order = parseInt(row.snowball_order, 10);
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if (!Number.isInteger(id) || id <= 0) continue;
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if (!Number.isInteger(order) || order < 0) continue;
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update.run(order, id, userId);
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}
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})(items);
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res.json({ success: true });
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});
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module.exports = router;
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