catalogue operations, db migr and so on.

pre release version.

services/catalogue.py

@@ -2,6 +2,8 @@ from typing import Union, Optional
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from dto.catalogue import CatalogueType, CatalogueView
+from misc.mapper import parse_cat_id, serialize_cat_id
+from misc.texts import get_breadcrumps_path
 from repositories import ProductRepository, CategoriesRepository
 from config import PAGE_SIZE
 
@@ -16,11 +18,7 @@ class CatalogueService:
     async def build_category_view(
         self, session: AsyncSession, cat_id: Optional[Union[int, str]], page: int = 0
     ) -> CatalogueView:
-        cat_id = (
-            int(cat_id)
-            if isinstance(cat_id, (int, str)) and str(cat_id).isdigit()
-            else None
-        )
+        cat_id = parse_cat_id(cat_id)
 
         view = CatalogueView(page=page)
         children = await self.categories_repo.get_categories_by_parent_id(
@@ -33,22 +31,28 @@ class CatalogueService:
             view.show_menu = True
         else:  # Subcategories
             view.category = cat_id
-            view.parent_id = category.parent_id or "root"
+            view.parent_id = serialize_cat_id(category.parent_id)
 
         if not children:  # Products
-            view.view_type = CatalogueType.PRODUCTS
             products = await self.product_repo.get_product_by_category(
                 session, cat_id, limit=PAGE_SIZE + 1, offset=view.page * PAGE_SIZE
             )
+            if products:
+                view.view_type = CatalogueType.PRODUCTS
+                view.products = products[:PAGE_SIZE]
+                view.has_next = len(products) > PAGE_SIZE
 
-            if not products:
-                view.view_type = CatalogueType.EMPTY
-
-            view.products = products[:PAGE_SIZE]
-            view.has_next = len(products) > PAGE_SIZE
+                return view
+            view.view_type = CatalogueType.EMPTY
             return view
 
         view.view_type = CatalogueType.CATEGORIES
-        view.children = children[:PAGE_SIZE]
+        view.children = children
 
         return view
+
+    async def get_path(self, session: AsyncSession, cat_id: Union[int, str]):
+        category = int(cat_id) if isinstance(cat_id, int) or cat_id.isdigit() else None
+        products = await self.categories_repo.get_category_path(session, category)
+
+        return get_breadcrumps_path(products)