feat(api): add deck conflict checks for trash bins loaded via addressable areas

api/src/opentrons/motion_planning/deck_conflict.py

@@ -60,6 +60,13 @@ class Labware:
     is_fixed_trash: bool
 
 
+@dataclass
+class TrashBin:
+    """A non-labware trash bin (loaded via api level 2.16 and above)."""
+
+    name_for_errors: str
+
+
 @dataclass
 class _Module:
     name_for_errors: str
@@ -98,6 +105,7 @@ class OtherModule(_Module):
     MagneticBlockModule,
     ThermocyclerModule,
     OtherModule,
+    TrashBin,
 ]
 
 
@@ -129,6 +137,10 @@ def is_allowed(self, item: DeckItem) -> bool:
                 return item.highest_z < self.max_height
         elif isinstance(item, _Module):
             return item.highest_z_including_labware < self.max_height
+        elif isinstance(item, TrashBin):
+            # Since this is a restriction for OT-2 only and OT-2 trashes exceeded the height limit, always return False
+            # TODO(jbl 2024-01-16) Include trash height and use that for check for more robustness
+            return False
 
 
 class _NoModule(NamedTuple):
@@ -234,7 +246,7 @@ def _create_ot2_restrictions(  # noqa: C901
             )
         )
 
-    if _is_fixed_trash(item):
+    if _is_ot2_fixed_trash(item):
         # A Heater-Shaker can't safely be placed just south of the fixed trash,
         # because the fixed trash blocks access to the screw that locks the
         # Heater-Shaker onto the deck.
@@ -379,5 +391,7 @@ def _flex_slots_covered_by_thermocycler() -> Set[DeckSlotName]:
     return {DeckSlotName.SLOT_B1, DeckSlotName.SLOT_A1}
 
 
-def _is_fixed_trash(item: DeckItem) -> bool:
-    return isinstance(item, Labware) and item.is_fixed_trash
+def _is_ot2_fixed_trash(item: DeckItem) -> bool:
+    return (isinstance(item, Labware) and item.is_fixed_trash) or isinstance(
+        item, TrashBin
+    )

api/src/opentrons/protocol_api/_trash_bin.py

@@ -10,3 +10,13 @@ class TrashBin:
     def __init__(self, location: DeckSlotName, addressable_area_name: str) -> None:
         self._location = location
         self._addressable_area_name = addressable_area_name
+
+    @property
+    def location(self) -> DeckSlotName:
+        """Location of the trash bin.
+
+        :meta private:
+
+        This is intended for Opentrons internal use only and is not a guarenteed API.
+        """
+        return self._location

api/src/opentrons/protocol_api/core/engine/deck_conflict.py

@@ -1,8 +1,8 @@
 """A Protocol-Engine-friendly wrapper for opentrons.motion_planning.deck_conflict."""
-
+from __future__ import annotations
 import itertools
 import logging
-from typing import Collection, Dict, Optional, Tuple, overload, Union
+from typing import Collection, Dict, Optional, Tuple, overload, Union, TYPE_CHECKING
 
 from opentrons_shared_data.errors.exceptions import MotionPlanningFailureError
 
@@ -27,6 +27,11 @@
 )
 from opentrons.protocol_engine.errors.exceptions import LabwareNotLoadedOnModuleError
 from opentrons.types import DeckSlotName, StagingSlotName, Point
+from ..._trash_bin import TrashBin
+from ..._waste_chute import WasteChute
+
+if TYPE_CHECKING:
+    from ...labware import Labware
 
 
 class PartialTipMovementNotAllowedError(MotionPlanningFailureError):
@@ -74,6 +79,7 @@ def check(
     engine_state: StateView,
     existing_labware_ids: Collection[str],
     existing_module_ids: Collection[str],
+    existing_disposal_locations: Collection[Union[Labware, WasteChute, TrashBin]],
     new_labware_id: str,
 ) -> None:
     pass
@@ -85,22 +91,37 @@ def check(
     engine_state: StateView,
     existing_labware_ids: Collection[str],
     existing_module_ids: Collection[str],
+    existing_disposal_locations: Collection[Union[Labware, WasteChute, TrashBin]],
     new_module_id: str,
 ) -> None:
     pass
 
 
+@overload
+def check(
+    *,
+    engine_state: StateView,
+    existing_labware_ids: Collection[str],
+    existing_module_ids: Collection[str],
+    existing_disposal_locations: Collection[Union[Labware, WasteChute, TrashBin]],
+    new_trash_bin: TrashBin,
+) -> None:
+    pass
+
+
 def check(
     *,
     engine_state: StateView,
     existing_labware_ids: Collection[str],
     existing_module_ids: Collection[str],
+    existing_disposal_locations: Collection[Union[Labware, WasteChute, TrashBin]],
     # TODO(mm, 2023-02-23): This interface is impossible to use correctly. In order
     # to have new_labware_id or new_module_id, the caller needs to have already loaded
     # the new item into Protocol Engine--but then, it's too late to do deck conflict.
     # checking. Find a way to do deck conflict checking before the new item is loaded.
     new_labware_id: Optional[str] = None,
     new_module_id: Optional[str] = None,
+    new_trash_bin: Optional[TrashBin] = None,
 ) -> None:
     """Check for conflicts between items on the deck.
 
@@ -125,6 +146,8 @@ def check(
         new_location_and_item = _map_labware(engine_state, new_labware_id)
     if new_module_id is not None:
         new_location_and_item = _map_module(engine_state, new_module_id)
+    if new_trash_bin is not None:
+        new_location_and_item = _map_disposal_location(new_trash_bin)
 
     if new_location_and_item is None:
         # The new item should be excluded from deck conflict checking. Nothing to do.
@@ -142,11 +165,19 @@ def check(
     )
     mapped_existing_modules = (m for m in all_existing_modules if m is not None)
 
+    all_exisiting_disposal_locations = (
+        _map_disposal_location(disposal_location)
+        for disposal_location in existing_disposal_locations
+    )
+    mapped_disposal_locations = (
+        m for m in all_exisiting_disposal_locations if m is not None
+    )
+
     existing_items: Dict[
         Union[DeckSlotName, StagingSlotName], wrapped_deck_conflict.DeckItem
     ] = {}
     for existing_location, existing_item in itertools.chain(
-        mapped_existing_labware, mapped_existing_modules
+        mapped_existing_labware, mapped_existing_modules, mapped_disposal_locations
     ):
         assert existing_location not in existing_items
         existing_items[existing_location] = existing_item
@@ -556,6 +587,18 @@ def _map_module(
         )
 
 
+def _map_disposal_location(
+    disposal_location: Union[Labware, WasteChute, TrashBin],
+) -> Optional[Tuple[DeckSlotName, wrapped_deck_conflict.DeckItem]]:
+    if isinstance(disposal_location, TrashBin):
+        return (
+            disposal_location.location,
+            wrapped_deck_conflict.TrashBin(name_for_errors="trash bin"),
+        )
+    else:
+        return None
+
+
 def _deck_slot_to_int(deck_slot_location: DeckSlotLocation) -> int:
     return deck_slot_location.slotName.as_int()
 

api/src/opentrons/protocol_api/core/engine/protocol.py

@@ -135,11 +135,24 @@ def append_disposal_location(
         self, disposal_location: Union[Labware, TrashBin, WasteChute]
     ) -> None:
         """Append a disposal location object to the core"""
+        if isinstance(disposal_location, TrashBin):
+            deck_conflict.check(
+                engine_state=self._engine_client.state,
+                new_trash_bin=disposal_location,
+                existing_disposal_locations=self._disposal_locations,
+                # It's important that we don't fetch these IDs from Protocol Engine, and
+                # use our own bookkeeping instead. If we fetched these IDs from Protocol
+                # Engine, it would have leaked state from Labware Position Check in the
+                # same HTTP run.
+                #
+                # Wrapping .keys() in list() is just to make Decoy verification easier.
+                existing_labware_ids=list(self._labware_cores_by_id.keys()),
+                existing_module_ids=list(self._module_cores_by_id.keys()),
+            )
         self._disposal_locations.append(disposal_location)
 
     def get_disposal_locations(self) -> List[Union[Labware, TrashBin, WasteChute]]:
         """Get disposal locations."""
-
         return self._disposal_locations
 
     def get_max_speeds(self) -> AxisMaxSpeeds:
@@ -212,6 +225,7 @@ def load_labware(
         deck_conflict.check(
             engine_state=self._engine_client.state,
             new_labware_id=load_result.labwareId,
+            existing_disposal_locations=self._disposal_locations,
             # It's important that we don't fetch these IDs from Protocol Engine, and
             # use our own bookkeeping instead. If we fetched these IDs from Protocol
             # Engine, it would have leaked state from Labware Position Check in the
@@ -266,6 +280,7 @@ def load_adapter(
         deck_conflict.check(
             engine_state=self._engine_client.state,
             new_labware_id=load_result.labwareId,
+            existing_disposal_locations=self._disposal_locations,
             # TODO (spp, 2023-11-27): We've been using IDs from _labware_cores_by_id
             #  and _module_cores_by_id instead of getting the lists directly from engine
             #  because of the chance of engine carrying labware IDs from LPC too.
@@ -343,6 +358,7 @@ def move_labware(
         deck_conflict.check(
             engine_state=self._engine_client.state,
             new_labware_id=labware_core.labware_id,
+            existing_disposal_locations=self._disposal_locations,
             existing_labware_ids=[
                 labware_id
                 for labware_id in self._labware_cores_by_id
@@ -400,6 +416,7 @@ def load_module(
         deck_conflict.check(
             engine_state=self._engine_client.state,
             new_module_id=result.moduleId,
+            existing_disposal_locations=self._disposal_locations,
             # TODO: We can now fetch these IDs from engine too.
             #  See comment in self.load_labware().
             #

api/tests/opentrons/motion_planning/test_deck_conflict.py

@@ -207,6 +207,41 @@ def test_flex_labware_when_thermocycler(
         )
 
 
+def test_flex_trash_bin_blocks_thermocycler() -> None:
+    """It should prevent loading a thermocycler when there is a trash in A1 and vice-versa."""
+    thermocycler = deck_conflict.ThermocyclerModule(
+        name_for_errors="some_thermocycler",
+        highest_z_including_labware=123,
+        is_semi_configuration=False,
+    )
+    trash = deck_conflict.TrashBin(name_for_errors="some_trash_bin")
+
+    with pytest.raises(
+        deck_conflict.DeckConflictError,
+        match=(
+            "some_trash_bin in slot A1 prevents some_thermocycler from using slot B1"
+        ),
+    ):
+        deck_conflict.check(
+            existing_items={DeckSlotName.SLOT_A1: trash},
+            new_item=thermocycler,
+            new_location=DeckSlotName.SLOT_B1,
+            robot_type="OT-3 Standard",
+        )
+    with pytest.raises(
+        deck_conflict.DeckConflictError,
+        match=(
+            "some_thermocycler in slot B1 prevents some_trash_bin from using slot A1"
+        ),
+    ):
+        deck_conflict.check(
+            existing_items={DeckSlotName.SLOT_B1: thermocycler},
+            new_item=trash,
+            new_location=DeckSlotName.SLOT_A1,
+            robot_type="OT-3 Standard",
+        )
+
+
 @pytest.mark.parametrize(
     ("heater_shaker_location", "labware_location"),
     [
@@ -496,6 +531,43 @@ def test_no_heater_shaker_south_of_trash() -> None:
         )
 
 
+def test_heater_shaker_restrictions_trash_bin_addressable_area() -> None:
+    """It should prevent loading a Heater-Shaker adjacent of a non-labware trash bin.
+
+    This is for the OT-2 only and for slot 11 and slot 9
+    """
+    heater_shaker = deck_conflict.HeaterShakerModule(
+        highest_z_including_labware=123, name_for_errors="some_heater_shaker"
+    )
+    trash = deck_conflict.TrashBin(name_for_errors="some_trash_bin")
+
+    with pytest.raises(
+        deck_conflict.DeckConflictError,
+        match=(
+            "some_trash_bin in slot 12" " prevents some_heater_shaker from using slot 9"
+        ),
+    ):
+        deck_conflict.check(
+            existing_items={DeckSlotName.FIXED_TRASH: trash},
+            new_item=heater_shaker,
+            new_location=DeckSlotName.SLOT_9,
+            robot_type="OT-2 Standard",
+        )
+    with pytest.raises(
+        deck_conflict.DeckConflictError,
+        match=(
+            "some_trash_bin in slot 12"
+            " prevents some_heater_shaker from using slot 11"
+        ),
+    ):
+        deck_conflict.check(
+            existing_items={DeckSlotName.FIXED_TRASH: trash},
+            new_item=heater_shaker,
+            new_location=DeckSlotName.SLOT_11,
+            robot_type="OT-2 Standard",
+        )
+
+
 @pytest.mark.parametrize(
     ("deck_slot_name", "adjacent_staging_slot", "non_adjacent_staging_slot"),
     [