fix(cart): account for a closed window and an empty menu

A closed page during add marks the remaining meals as not attempted, and an empty menu catalog raises the same error as the menu parser.

scripts/fill_redefine_cart.py

@@ -145,7 +145,8 @@ def _fill_page(page, plan: FillPlan, menu_url: str) -> int:
                 return 1
 
         posted = []
-        for item in plan.adds:
+        page_closed = False
+        for index, item in enumerate(plan.adds):
             try:
                 _cart_request(
                     page,
@@ -161,27 +162,37 @@ def _fill_page(page, plan: FillPlan, menu_url: str) -> int:
                 failed.append(f"{item.name}: {exc}")
                 print(f"Failed: {item.name}: {exc}")
                 continue
-            posted.append(item)
-
-        try:
-            current = cart_lines(_cart_request(page, "GET", "/api/cart"))
-        except RuntimeError as exc:
-            failed.append(f"Could not read the cart: {exc}")
-            print(f"Failed: Could not read the cart: {exc}")
-        else:
-            for item in posted:
-                found = quantity_for(current, item.uuid)
-                if found != item.quantity:
-                    message = (
-                        f"{item.name}: requested {item.quantity}, cart has {found}"
-                    )
+            except PlaywrightError as exc:
+                failed.append(f"{item.name}: {exc}")
+                print(f"Failed: {item.name}: {exc}")
+                for rest in plan.adds[index + 1 :]:
+                    message = f"{rest.name}: not attempted"
                     failed.append(message)
                     print(f"Failed: {message}")
-                else:
-                    added += 1
-        origin = _origin(page.url or menu_url)
-        page.goto(f"{origin}/cart", wait_until="domcontentloaded", timeout=60000)
-        ready = True
+                page_closed = True
+                break
+            posted.append(item)
+
+        if not page_closed:
+            try:
+                current = cart_lines(_cart_request(page, "GET", "/api/cart"))
+            except RuntimeError as exc:
+                failed.append(f"Could not read the cart: {exc}")
+                print(f"Failed: Could not read the cart: {exc}")
+            else:
+                for item in posted:
+                    found = quantity_for(current, item.uuid)
+                    if found != item.quantity:
+                        message = (
+                            f"{item.name}: requested {item.quantity}, cart has {found}"
+                        )
+                        failed.append(message)
+                        print(f"Failed: {message}")
+                    else:
+                        added += 1
+            origin = _origin(page.url or menu_url)
+            page.goto(f"{origin}/cart", wait_until="domcontentloaded", timeout=60000)
+            ready = True
     except (RuntimeError, PlaywrightError) as exc:
         failed.append(str(exc))
         print(f"Failed: {exc}")

src/scraper/parse_menu.py

@@ -49,6 +49,8 @@ def extract_catalog_products(page: str) -> list:
     products = _extract_json_attr(page, PRODUCTS_MARKER)
     if not isinstance(products, list):
         raise MenuParseError(":products must be a JSON array")
+    if not products:
+        raise MenuParseError("Menu catalog is empty")
     return products
 
 

tests/test_fill_cart.py

@@ -205,6 +205,29 @@ def test_fill_page_prints_a_summary_when_the_window_closes_mid_add(capsys):
     assert "Cart is ready" not in output
 
 
+def test_fill_page_counts_items_left_when_the_window_closes(capsys):
+    plan = build_plan(
+        "Item,Quantity\nKorean Steak Bowl,1\nSale Bowl,2\n",
+        PRODUCTS,
+    )
+    page = _CartPage(
+        [
+            {"ok": True, "status": 200, "data": {"items": []}},
+            PlaywrightError("Target page, context or browser has been closed"),
+        ]
+    )
+
+    code = fill_redefine_cart._fill_page(
+        page, plan, "https://www.redefinemeals.com/menu"
+    )
+    output = capsys.readouterr().out
+
+    assert code == 1
+    assert "Korean Steak Bowl:" in output
+    assert "Sale Bowl: not attempted" in output
+    assert "Added 0. Failed 2. Skipped 0." in output
+
+
 def test_fill_page_prints_a_summary_when_the_first_cart_read_fails(capsys):
     plan = build_plan("Item,Quantity\nKorean Steak Bowl,1\n", PRODUCTS)
     page = _CartPage(

tests/test_parse_menu.py

@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pytest
 
-from scraper.parse_menu import MenuParseError, parse_menu_html
+from scraper.parse_menu import MenuParseError, extract_catalog_products, parse_menu_html
 
 FIXTURE = Path(__file__).resolve().parent / "fixtures" / "menu_page.html"
 
@@ -43,6 +43,12 @@ def test_parse_menu_html_rejects_a_missing_catalog():
         parse_menu_html("<html></html>", menu_url="https://example.com/menu")
 
 
+def test_extract_catalog_products_rejects_an_empty_catalog():
+    page = "<orders-page :products='[]' :newest-ids='[]'></orders-page>"
+    with pytest.raises(MenuParseError, match="empty"):
+        extract_catalog_products(page)
+
+
 def test_parse_menu_html_rejects_an_empty_catalog():
     page = "<orders-page :products='[]' :newest-ids='[]'></orders-page>"
     with pytest.raises(MenuParseError, match="empty"):