Redesign shopping list

js/services/pantryShopping.js

@@ -1,5 +1,5 @@
 import { INGREDIENTS, CATEGORY_LABELS, PRODUCTS, ingredientHasProducts } from '../data/catalog.js?v=9';
-import { PANTRY_STORAGE_KEY, PANTRY_STORAGE_KEY_V2, SHOPPING_STORAGE_KEY } from '../storageKeys.js';
+import { PANTRY_STORAGE_KEY, PANTRY_STORAGE_KEY_V2, SHOPPING_STORAGE_KEY, SHOPPING_SESSION_KEY } from '../storageKeys.js';
 
 export const KITCHEN_LIST_ID = 'kitchen';
 export const MISC_LIST_ID = 'misc';
@@ -535,6 +535,148 @@ export function setPantryProductQty(ingredientId, productId, qty) {
     return pantry;
 }
 
+/**
+ * Dodaj delta do spiżarni (używane przy zakupie ze listy).
+ * @param {string} ingredientId
+ * @param {string|undefined} productId
+ * @param {number} amount
+ */
+export function addAmountToPantry(ingredientId, productId, amount) {
+    const pantry = loadPantry();
+    const rounded = Math.round(amount * 1000) / 1000;
+    if (productId && PRODUCTS[productId]) {
+        let val = pantry[ingredientId];
+        if (!val || typeof val === 'number') {
+            val = { items: [], _total: 0 };
+            pantry[ingredientId] = val;
+        }
+        const idx = val.items.findIndex((i) => i.productId === productId);
+        if (idx >= 0) val.items[idx].qty = Math.round((val.items[idx].qty + rounded) * 1000) / 1000;
+        else val.items.push({ productId, qty: rounded });
+        recalcTotal(val);
+    } else {
+        const cur = typeof pantry[ingredientId] === 'number' ? pantry[ingredientId] : 0;
+        pantry[ingredientId] = Math.round((cur + rounded) * 1000) / 1000;
+    }
+    savePantry(pantry);
+    return pantry;
+}
+
+/**
+ * Odejmij delta ze spiżarni (undo zakupu).
+ * @param {string} ingredientId
+ * @param {string|undefined} productId
+ * @param {number} amount
+ */
+export function subtractFromPantry(ingredientId, productId, amount) {
+    const pantry = loadPantry();
+    if (productId && PRODUCTS[productId]) {
+        const val = pantry[ingredientId];
+        if (!val || typeof val === 'number') return pantry;
+        const idx = val.items.findIndex((i) => i.productId === productId);
+        if (idx < 0) return pantry;
+        val.items[idx].qty = Math.max(0, Math.round((val.items[idx].qty - amount) * 1000) / 1000);
+        if (val.items[idx].qty <= 0) val.items.splice(idx, 1);
+        recalcTotal(val);
+        if (val._total <= 0) delete pantry[ingredientId];
+    } else {
+        const cur = typeof pantry[ingredientId] === 'number' ? pantry[ingredientId] : 0;
+        const next = Math.max(0, Math.round((cur - amount) * 1000) / 1000);
+        if (next <= 0) delete pantry[ingredientId];
+        else pantry[ingredientId] = next;
+    }
+    savePantry(pantry);
+    return pantry;
+}
+
+/* ══════════════════════════════════════════════════════════════════════
+ * Session zakupowy — selectedDays + log zakupów bieżącej sesji
+ * ══════════════════════════════════════════════════════════════════════ */
+
+/**
+ * @typedef {{ id: string, ingredientId: string, productId?: string, name: string, addedAmount: number, unit: string, category: string, timestamp: number }} SessionLogEntry
+ * @typedef {{ selectedDays: string[], sessionLog: SessionLogEntry[] }} ShoppingSessionState
+ */
+
+function defaultShoppingSession() {
+    return { selectedDays: [], sessionLog: [] };
+}
+
+function normalizeShoppingSession(raw) {
+    if (!raw || typeof raw !== 'object') return defaultShoppingSession();
+    const selectedDays = Array.isArray(raw.selectedDays)
+        ? raw.selectedDays.filter((d) => typeof d === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(d))
+        : [];
+    const sessionLog = Array.isArray(raw.sessionLog)
+        ? raw.sessionLog.filter((e) => e && typeof e.ingredientId === 'string' && Number.isFinite(e.addedAmount))
+        : [];
+    return { selectedDays, sessionLog };
+}
+
+/** @returns {ShoppingSessionState} */
+export function loadShoppingSession() {
+    try {
+        const raw = localStorage.getItem(SHOPPING_SESSION_KEY);
+        if (!raw) return defaultShoppingSession();
+        return normalizeShoppingSession(JSON.parse(raw));
+    } catch {
+        return defaultShoppingSession();
+    }
+}
+
+/** @param {ShoppingSessionState} s */
+export function saveShoppingSession(s) {
+    try {
+        localStorage.setItem(SHOPPING_SESSION_KEY, JSON.stringify(s));
+    } catch { /* ignore */ }
+}
+
+/** @returns {string[]} */
+export function getSelectedDays() {
+    return loadShoppingSession().selectedDays;
+}
+
+/** @param {string[]} days */
+export function setSelectedDays(days) {
+    const s = loadShoppingSession();
+    s.selectedDays = days;
+    saveShoppingSession(s);
+}
+
+/**
+ * @param {{ ingredientId: string, productId?: string, name: string, addedAmount: number, unit: string, category: string }} entry
+ * @returns {string} new entry id
+ */
+export function addSessionLogEntry(entry) {
+    const s = loadShoppingSession();
+    const id = newId('sl');
+    s.sessionLog.push({
+        id,
+        ingredientId: entry.ingredientId,
+        productId: entry.productId || undefined,
+        name: entry.name,
+        addedAmount: Math.round(entry.addedAmount * 100) / 100,
+        unit: entry.unit,
+        category: entry.category,
+        timestamp: Date.now(),
+    });
+    saveShoppingSession(s);
+    return id;
+}
+
+/** @param {string} entryId */
+export function removeSessionLogEntry(entryId) {
+    const s = loadShoppingSession();
+    s.sessionLog = s.sessionLog.filter((e) => e.id !== entryId);
+    saveShoppingSession(s);
+}
+
+export function clearSessionLog() {
+    const s = loadShoppingSession();
+    s.sessionLog = [];
+    saveShoppingSession(s);
+}
+
 /** Kupione ze listy kuchennej → spiżarnia (zawsze ta lista, niezależnie od aktywnej zakładki). */
 export function applyCheckedKitchenListToPantry() {
     const s = loadShoppingState();