New IFC to Brick class mapping utility

src/ifcopenshell-python/ifcopenshell/util/brick.py

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+import os
+import json
+
+
+cwd = os.path.dirname(os.path.realpath(__file__))
+
+ifc4_to_brick_map = {}
+
+with open(os.path.join(cwd, "ifc4_to_brick.json")) as f:
+    ifc4_to_brick_map = json.load(f)
+
+
+def get_brick_type(element):
+    predefined_type = getattr(element, "PredefinedType", None)
+    result = None
+    if predefined_type:
+        result = ifc4_to_brick_map.get(f"{element.is_a()}.{predefined_type}", None)
+    if not result:
+        result = ifc4_to_brick_map.get(element.is_a(), None)
+    return result

src/ifcopenshell-python/ifcopenshell/util/ifc4_to_brick.json

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+{
+    "IfcAudioVisualAppliance.CAMERA": "Camera",
+    "IfcUnitaryEquipment.AIRHANDLER": "AHU",
+    "IfcBoiler": "Boiler",
+    "IfcUnitaryEquipment.AIRCONDITIONINGUNIT": "CRAC",
+    "IfcChiller": "Chiller",
+    "IfcCompressor": "Compressor",
+    "IfcCondenser": "Condenser",
+    "IfcCoolingTower": "Cooling_Tower",
+    "IfcDamper": "Damper",
+    "IfcFan": "Fan",
+    "IfcFilter": "Filter",
+    "IfcHeatExchanger": "Heat_Exchanger",
+    "IfcHumidifier": "Humidifier",
+    "IfcPump": "Pump",
+    "IfcAirTerminalBox": "TerminalUnit",
+    "IfcAirTerminalBox.CONSTANTFLOW": "CAV",
+    "IfcAirTerminalBox.VARIABLEFLOWPRESSUREDEPENDANT": "VAV",
+    "IfcAirTerminalBox.VARIABLEFLOWPRESSUREINDEPENDANT": "VAV",
+    "IfcValve": "Valve",
+    "IfcUnitaryControlElement.THERMOSTAT": "Thermostat",
+    "IfcUnitaryControlElement.WEATHERSTATION": "Weather_Station",
+    "IfcLightFixture": "Luminaire",
+    "IfcFlowMeter": "Meter",
+    "IfcFlowMeter.ENERGYMETER": "Electric_Meter",
+    "IfcFlowMeter.GASMETER": "Gas_Meter",
+    "IfcFlowMeter.WATERMETER": "Water_Meter",
+    "IfcElectricMotor": "Motor",
+    "IfcSolarDevice.SOLARPANEL": "PV_Panel",
+    "IfcBuilding": "Building",
+    "IfcBuildingStorey": "Floor",
+    "IfcSpace": "Space",
+    "IfcSpatialZone": "Zone",
+    "IfcSpatialZone.THERMAL": "HVAC_Zone",
+    "IfcSpatialZone.LIGHTING": "Lighting_Zone"
+}

src/ifcopenshell-python/test/util/test_brick.py

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+import pytest
+import test.bootstrap
+import ifcopenshell.util.brick as subject
+
+
+class TestGetBrickTypeIFC4(test.bootstrap.IFC4):
+    def test_run(self):
+        element = self.file.createIfcAirTerminalBox()
+        assert subject.get_brick_type(element) == "TerminalUnit"
+        element.PredefinedType = "CONSTANTFLOW"
+        assert subject.get_brick_type(element) == "CAV"