feat: Cross-Household Recipes (#4089)

frontend/composables/recipes/use-recipe-permissions.ts

@@ -0,0 +1,34 @@
+import { computed } from "@nuxtjs/composition-api";
+import { Recipe } from "~/lib/api/types/recipe";
+import { UserOut } from "~/lib/api/types/user";
+
+export function useRecipePermissions(recipe: Recipe, user: UserOut | null) {
+    const canEditRecipe = computed(() => {
+        // Check recipe owner
+        if (!user?.id) {
+          return false;
+        }
+        if (user.id === recipe.userId) {
+          return true;
+        }
+
+        // Check group and household
+        if (user.groupId !== recipe.groupId) {
+          return false;
+        }
+        if (user.householdId !== recipe.householdId) {
+          return false;
+        }
+
+        // Check recipe
+        if (recipe.settings?.locked) {
+          return false;
+        }
+
+        return true;
+      });
+
+    return {
+        canEditRecipe,
+    }
+}