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Fix timezone hazard in financing start_date guard

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Replace new Date(date_string) + getFullYear/getMonth with direct string
parsing (split('-').map(Number)) so month comparisons are never shifted
by UTC offset. Affects both buildVirtualPaychecks and generatePaychecks.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Iswa Iswa
2026-03-19 20:39:47 -04:00
parent 119d53c33a
commit 5aaa5cfed8
1 changed files with 2 additions and 6 deletions
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8
server/src/routes/paychecks.js
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@@ -97,9 +97,7 @@ async function buildVirtualPaychecks(year, month) {
try {
for (const plan of activePlans.rows) {
// Skip plans that haven't started yet for this period
const start = new Date(plan.start_date);
const planStartYear = start.getFullYear();
const planStartMonth = start.getMonth() + 1;
const [planStartYear, planStartMonth] = plan.start_date.split('-').map(Number);
if (year * 12 + month < planStartYear * 12 + planStartMonth) continue;
const amount = await calcPaymentAmount(client, plan, year, month);
@@ -202,9 +200,7 @@ async function generatePaychecks(year, month) {
);
for (const plan of activePlans.rows) {
// Skip plans that haven't started yet for this period
const start = new Date(plan.start_date);
const planStartYear = start.getFullYear();
const planStartMonth = start.getMonth() + 1;
const [planStartYear, planStartMonth] = plan.start_date.split('-').map(Number);
if (year * 12 + month < planStartYear * 12 + planStartMonth) continue;
// Determine which paycheck(s) this plan applies to