From b4255ef2d5e32157e885e6e84d82f2bbddf9c82e Mon Sep 17 00:00:00 2001
From: 4aiman <konsorumaniakku@ya.ru>
Date: Sun, 31 May 2026 00:48:23 +0300
Subject: [PATCH] Block product deletion if used in food log or recipes

---
 frontend/js/db.js   | 10 +++++++---
 frontend/js/main.js |  5 +++++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/frontend/js/db.js b/frontend/js/db.js
index c0b52f8..95140a0 100644
--- a/frontend/js/db.js
+++ b/frontend/js/db.js
@@ -162,10 +162,13 @@ async function addProduct(p) {
   return rows[0]?.id;
 }
 
+async function getProductRefs(id) {
+  const food = await select("SELECT COUNT(*) as cnt FROM food_log WHERE product_id = ?1", [id]);
+  const recipes = await select("SELECT COUNT(*) as cnt FROM recipe_ingredients WHERE product_id = ?1", [id]);
+  return { food: food[0]?.cnt || 0, recipes: recipes[0]?.cnt || 0 };
+}
+
 async function deleteProduct(id) {
-  // Reassign food_log and recipe_ingredients to avoid orphaned references
-  await execute("UPDATE food_log SET product_id = NULL WHERE product_id = ?1", [id]);
-  await execute("UPDATE recipe_ingredients SET product_id = 0 WHERE product_id = ?1", [id]);
   await execute("DELETE FROM products WHERE id = ?1", [id]);
 }
 
@@ -906,6 +909,7 @@ window.DB.searchProducts         = searchProducts;
 window.DB.getProduct             = getProduct;
 window.DB.addProduct             = addProduct;
 window.DB.deleteProduct          = deleteProduct;
+window.DB.getProductRefs         = getProductRefs;
 window.DB.getFoodForDate         = getFoodForDate;
 window.DB.addFoodManual          = addFoodManual;
 window.DB.addFoodEntry           = addFoodEntry;
diff --git a/frontend/js/main.js b/frontend/js/main.js
index 96c8743..47c14d6 100644
--- a/frontend/js/main.js
+++ b/frontend/js/main.js
@@ -1326,6 +1326,11 @@ async function renderProducts(container) {
       btn.onclick = async e => {
         e.stopPropagation();
         const pid = parseInt(btn.dataset.pid);
+        const refs = await DB.getProductRefs(pid);
+        if (refs.food > 0 || refs.recipes > 0) {
+          alert(`Нельзя удалить: продукт используется в ${refs.food ? refs.food + " записях еды" : ""}${refs.food && refs.recipes ? " и " : ""}${refs.recipes ? refs.recipes + " рецептах" : ""}`);
+          return;
+        }
         await DB.deleteProduct(pid);
         doSearch(false);
       };