prevent duplicate imports

cookbook/integration/integration.py

@@ -10,7 +10,7 @@ from django.http import HttpResponseRedirect, HttpResponse
 from django.urls import reverse
 from django.utils.formats import date_format
 from django.utils.translation import gettext as _
-from cookbook.models import Keyword
+from cookbook.models import Keyword, Recipe
 
 
 class Integration:
@@ -81,6 +81,7 @@ class Integration:
         :param files: List of in memory files
         :return: HttpResponseRedirect to the recipe search showing all imported recipes
         """
+        ignored_recipes = []
         try:
             self.files = files
             for f in files:
@@ -90,15 +91,32 @@ class Integration:
                         if self.import_file_name_filter(z):
                             recipe = self.get_recipe_from_file(BytesIO(import_zip.read(z.filename)))
                             recipe.keywords.add(self.keyword)
+                            if duplicate := self.is_duplicate(recipe):
+                                ignored_recipes.append(duplicate)
                     import_zip.close()
                 else:
                     recipe = self.get_recipe_from_file(f.file)
                     recipe.keywords.add(self.keyword)
+                    if duplicate := self.is_duplicate(recipe):
+                        ignored_recipes.append(duplicate)
         except BadZipFile:
             messages.add_message(self.request, messages.ERROR, _('Importer expected a .zip file. Did you choose the correct importer type for your data ?'))
 
+        if len(ignored_recipes) > 0:
+            messages.add_message(self.request, messages.WARNING, _('The following recipes were ignored because they already existed:') + ' ' + ', '.join(ignored_recipes))
         return HttpResponseRedirect(reverse('view_search') + '?keywords=' + str(self.keyword.pk))
 
+    def is_duplicate(self, recipe):
+        """
+        Checks if a recipe is already present, if so deletes it
+        :param recipe: Recipe object
+        """
+        if Recipe.objects.filter(space=self.request.space, name=recipe.name).exists():
+            recipe.delete()
+            return recipe.name
+        else:
+            return None
+
     @staticmethod
     def import_recipe_image(recipe, image_file):
         """