separated clients handlers, cart->checkout ppline

handlers/client/cart.py

@@ -0,0 +1,80 @@
+from aiogram import Router, F
+from aiogram.types import CallbackQuery, Message
+from aiogram.filters import Command
+from aiogram.fsm.context import FSMContext
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from config import PAGE_SIZE
+from misc.kb.client import (
+    render_cart,
+)
+from services.orders import OrderService
+
+router = Router()
+
+
+@router.callback_query(F.data == "cart")
+async def cart_init(
+    cb: CallbackQuery,
+    state: FSMContext,
+    session: AsyncSession,
+    order_service: OrderService,
+):
+    await state.clear()
+
+    cart = await order_service.build_pagination_cart_dto(
+        session, customer=cb.from_user.id
+    )
+
+    await cb.message.edit_text(
+        f"total: {cart.total}₽",
+        reply_markup=render_cart(
+            cart.items[:PAGE_SIZE], show_next=len(cart.items) > PAGE_SIZE
+        ),
+    )
+
+
+@router.message(Command("cart"))
+async def cart_cmd(
+    msg: Message,
+    state: FSMContext,
+    session: AsyncSession,
+    order_service: OrderService,
+):
+    await state.clear()
+
+    cart = await order_service.build_pagination_cart_dto(
+        session, customer=msg.from_user.id
+    )
+
+    await msg.answer(
+        f"total: {cart.total}₽",
+        reply_markup=render_cart(
+            cart.items[:PAGE_SIZE], show_next=len(cart.items) > PAGE_SIZE
+        ),
+    )
+
+
+@router.callback_query(F.data.startswith("cart:"))
+async def cart_pagination(
+    cb: CallbackQuery,
+    state: FSMContext,
+    session: AsyncSession,
+    order_service: OrderService,
+):
+    await state.clear()
+
+    page = int(cb.data.split(":")[1])
+
+    cart = await order_service.build_pagination_cart_dto(
+        session, customer=cb.from_user.id, offset=page * PAGE_SIZE
+    )
+
+    await cb.message.edit_reply_markup(
+        reply_markup=render_cart(
+            cart.items[:PAGE_SIZE],
+            page=page,
+            show_next=len(cart.items) > PAGE_SIZE,
+            show_prev=page > 0,
+        ),
+    )