Improve pantry view

stacks/recipe/js/data/catalog.js

@@ -1,6 +1,7 @@
 /**
  * Katalog składników i przepisów — odpowiednik tabel w DB (edycja poza aplikacją).
  * pantryUnit: jednostka magazynowa / sumowania na liście zakupów (g, ml, szt.).
+ * purchasePack: minimalna „sztuka” ze sklepu w tej samej jednostce co pantryUnit (np. 200 g).
  * nutritionPer100g — wartości szacunkowe na 100 g (dla płynów: traktuj ml≈g przy wodzie).
  */
 
@@ -15,7 +16,13 @@ export const CATEGORY_LABELS = {
     inne: 'Inne',
 };
 
-/** @type {Record<string, { id: string, name: string, category: keyof typeof CATEGORY_LABELS, pantryUnit: 'g'|'ml'|'szt', nutritionPer100g?: { kcal: number, protein: number, fat: number, carbs: number } }>} */
+/**
+ * @typedef {{ kcal: number, protein: number, fat: number, carbs: number }} NutritionPer100
+ * @typedef {{ amount: number, label?: string }} PurchasePack
+ * @typedef {{ id: string, name: string, category: keyof typeof CATEGORY_LABELS, pantryUnit: 'g'|'ml'|'szt', purchasePack?: PurchasePack, nutritionPer100g?: NutritionPer100 }} IngredientDef
+ */
+
+/** @type {Record<string, IngredientDef>} */
 export const INGREDIENTS = {
     maka_pszenna: {
         id: 'maka_pszenna',
@@ -29,6 +36,7 @@ export const INGREDIENTS = {
         name: 'Mleko',
         category: 'nabial',
         pantryUnit: 'ml',
+        purchasePack: { amount: 1000, label: 'butelka 1 l' },
         nutritionPer100g: { kcal: 42, protein: 3.4, fat: 1, carbs: 5 },
     },
     jajko: {
@@ -169,6 +177,7 @@ export const INGREDIENTS = {
         name: 'Serek wiejski',
         category: 'nabial',
         pantryUnit: 'g',
+        purchasePack: { amount: 200, label: 'opakowanie 200 g' },
         nutritionPer100g: { kcal: 97, protein: 11, fat: 5, carbs: 3 },
     },
     orzechy_wloskie: {
@@ -316,3 +325,47 @@ export const RECIPES = {
         ],
     },
 };
+
+/**
+ * Krok +/- w spiżarni: całe opakowanie albo domyślny krok (10 g/ml lub 1 szt.).
+ * @param {string} ingredientId
+ * @returns {number}
+ */
+export function pantryQtyStep(ingredientId) {
+    const d = INGREDIENTS[ingredientId];
+    if (!d) return 10;
+    if (d.purchasePack && Number.isFinite(d.purchasePack.amount) && d.purchasePack.amount > 0) {
+        return d.purchasePack.amount;
+    }
+    return d.pantryUnit === 'szt' ? 1 : 10;
+}
+
+/**
+ * @param {IngredientDef} def
+ * @param {number} stockQty — w pantryUnit
+ */
+export function nutritionForStock(def, stockQty) {
+    const n = def.nutritionPer100g;
+    if (!n || !Number.isFinite(stockQty) || stockQty <= 0) return null;
+    const f = stockQty / 100;
+    return {
+        kcal: Math.round(n.kcal * f),
+        protein: Math.round(n.protein * f * 10) / 10,
+        fat: Math.round(n.fat * f * 10) / 10,
+        carbs: Math.round(n.carbs * f * 10) / 10,
+    };
+}
+
+/**
+ * Pełne opakowania + reszta (np. 450 g / 200 → 2 + 50 g).
+ * @param {IngredientDef} def
+ * @param {number} stockQty
+ * @returns {{ fullPacks: number, remainder: number } | null}
+ */
+export function splitStockIntoPacks(def, stockQty) {
+    const size = def.purchasePack?.amount;
+    if (!size || !Number.isFinite(size) || size <= 0 || !Number.isFinite(stockQty)) return null;
+    const fullPacks = Math.floor(stockQty / size);
+    const remainder = Math.round((stockQty - fullPacks * size) * 10) / 10;
+    return { fullPacks, remainder };
+}