Added meal planner, pantry and shopping list

js/services/dateUtils.js

@@ -0,0 +1,51 @@
+export function startOfDay(d) {
+    const x = new Date(d);
+    x.setHours(0, 0, 0, 0);
+    return x;
+}
+
+export function sameDay(a, b) {
+    return a.getFullYear() === b.getFullYear()
+        && a.getMonth() === b.getMonth()
+        && a.getDate() === b.getDate();
+}
+
+export function addDays(d, n) {
+    const x = new Date(d);
+    x.setDate(x.getDate() + n);
+    return startOfDay(x);
+}
+
+/** Poniedziałek jako pierwszy dzień tygodnia (PL) */
+export function startOfWeekMonday(d) {
+    const date = startOfDay(d);
+    const day = date.getDay();
+    const diff = day === 0 ? -6 : 1 - day;
+    return addDays(date, diff);
+}
+
+export function startOfMonth(d) {
+    const x = new Date(d.getFullYear(), d.getMonth(), 1);
+    return startOfDay(x);
+}
+
+export function addMonths(d, n) {
+    const x = new Date(d);
+    x.setMonth(x.getMonth() + n);
+    return startOfDay(x);
+}
+
+export function addWeeks(d, n) {
+    return addDays(d, n * 7);
+}
+
+export function weekContains(weekStart, d) {
+    const t = startOfDay(d).getTime();
+    const ws = weekStart.getTime();
+    const we = addDays(weekStart, 6).getTime();
+    return t >= ws && t <= we;
+}
+
+export function sameMonth(a, b) {
+    return a.getMonth() === b.getMonth() && a.getFullYear() === b.getFullYear();
+}