Redesign shopping list

js/services/planIngredients.js

@@ -218,6 +218,35 @@ export function aggregateRangeIngredientNeed(plans, startDate, numDays) {
         });
 }
 
+/**
+ * Zapotrzebowanie składników dla konkretnych dni (tablica dateKey-ów).
+ * @param {Record<string, unknown>} plans
+ * @param {string[]} selectedDays — tablica dateKey-ów ('YYYY-MM-DD')
+ */
+export function aggregateSelectedDaysIngredientNeed(plans, selectedDays) {
+    if (!selectedDays || selectedDays.length === 0) return [];
+    const map = new Map();
+    for (const dk of selectedDays) {
+        const [y, m, d] = dk.split('-').map(Number);
+        const day = new Date(y, m - 1, d);
+        const dayPlan = getDayPlan(plans, day);
+        const lines = flattenDayIngredientLines(dayPlan);
+        for (const line of lines) {
+            const key = `${line.ingredientId}\t${line.unit}`;
+            const cur = map.get(key);
+            if (!cur) {
+                map.set(key, { ...line });
+            } else {
+                cur.amount = Math.round((cur.amount + line.amount) * 10) / 10;
+            }
+        }
+    }
+    return [...map.values()].sort((a, b) => {
+        const c = a.category.localeCompare(b.category);
+        return c !== 0 ? c : a.name.localeCompare(b.name, 'pl');
+    });
+}
+
 /**
  * Jedna grupa na porę dnia: nagłówek pory raz, potem bloki przepisów ze składnikami.
  */