Fix unfinished time/date/duration handling in edit task time, work plan, work schedule, and finally refactor attribute i/o like I promised

src/blenderbim/blenderbim/bim/helper.py

@@ -1,153 +1,62 @@
+import bpy
+import json
 import math
+import ifcopenshell
+import ifcopenshell.util.attribute
 from mathutils import geometry
 from mathutils import Vector
-import bpy
+from blenderbim.bim.ifc import IfcStore
 
 
-# TODO: Deprecate this in favour of ifcopenshell.util.unit
+def import_attributes(ifc_class, props, data, callback=None):
+    for attribute in IfcStore.get_schema().declaration_by_name(ifc_class).all_attributes():
+        data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+        if data_type == "entity":
+            continue
+        new = props.add()
+        new.name = attribute.name()
+        new.is_null = data[attribute.name()] is None
+        new.is_optional = attribute.optional()
+        new.data_type = data_type
+        is_handled_by_callback = callback(attribute.name(), new, data) if callback else False
+        if is_handled_by_callback:
+            pass  # Our job is done
+        elif data_type == "string":
+            new.string_value = "" if new.is_null else data[attribute.name()]
+        elif data_type == "boolean":
+            new.bool_value = False if new.is_null else data[attribute.name()]
+        elif data_type == "integer":
+            new.int_value = 0 if new.is_null else data[attribute.name()]
+        elif data_type == "float":
+            new.float_value = 0.0 if new.is_null else data[attribute.name()]
+        elif data_type == "enum":
+            new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
+            if data[attribute.name()]:
+                new.enum_value = data[attribute.name()]
 
 
-class SIUnitHelper:
+def export_attributes(props, callback=None):
-    prefixes = {
+    attributes = {}
-        "EXA": 1e18,
+    for attribute in props:
-        "PETA": 1e15,
+        is_handled_by_callback = callback(attributes, attribute) if callback else False
-        "TERA": 1e12,
+        if attribute.is_null:
-        "GIGA": 1e9,
+            attributes[attribute.name] = None
-        "MEGA": 1e6,
+        elif is_handled_by_callback:
-        "KILO": 1e3,
+            pass  # Our job is done
-        "HECTO": 1e2,
+        elif attribute.data_type == "string":
-        "DECA": 1e1,
+            attributes[attribute.name] = attribute.string_value
-        "DECI": 1e-1,
+        elif attribute.data_type == "boolean":
-        "CENTI": 1e-2,
+            attributes[attribute.name] = attribute.bool_value
-        "MILLI": 1e-3,
+        elif attribute.data_type == "integer":
-        "MICRO": 1e-6,
+            attributes[attribute.name] = attribute.int_value
-        "NANO": 1e-9,
+        elif attribute.data_type == "float":
-        "PICO": 1e-12,
+            attributes[attribute.name] = attribute.float_value
-        "FEMTO": 1e-15,
+        elif attribute.data_type == "enum":
-        "ATTO": 1e-18,
+            attributes[attribute.name] = attribute.enum_value
-    }
+    return attributes
-    unit_names = [
-        "AMPERE",
-        "BECQUEREL",
-        "CANDELA",
-        "COULOMB",
-        "CUBIC_METRE",
-        "DEGREE CELSIUS",
-        "FARAD",
-        "GRAM",
-        "GRAY",
-        "HENRY",
-        "HERTZ",
-        "JOULE",
-        "KELVIN",
-        "LUMEN",
-        "LUX",
-        "MOLE",
-        "NEWTON",
-        "OHM",
-        "PASCAL",
-        "RADIAN",
-        "SECOND",
-        "SIEMENS",
-        "SIEVERT",
-        "SQUARE METRE",
-        "METRE",
-        "STERADIAN",
-        "TESLA",
-        "VOLT",
-        "WATT",
-        "WEBER",
-    ]
-    si_conversions = {
-        "inch": 0.0254,
-        "foot": 0.3048,
-        "yard": 0.914,
-        "mile": 1609,
-        "square inch": 0.0006452,
-        "square foot": 0.09290304,
-        "square yard": 0.83612736,
-        "acre": 4046.86,
-        "square mile": 2588881,
-        "cubic inch": 0.00001639,
-        "cubic foot": 0.02831684671168849,
-        "cubic yard": 0.7636,
-        "litre": 0.001,
-        "fluid ounce UK": 0.0000284130625,
-        "fluid ounce US": 0.00002957353,
-        "pint UK": 0.000568,
-        "pint US": 0.000473,
-        "gallon UK": 0.004546,
-        "gallon US": 0.003785,
-        "degree": math.pi / 180,
-        "ounce": 0.02835,
-        "pound": 0.454,
-        "ton UK": 1016.0469088,
-        "ton US": 907.18474,
-        "lbf": 4.4482216153,
-        "kip": 4448.2216153,
-        "psi": 6894.7572932,
-        "ksi": 6894757.2932,
-        "minute": 60,
-        "hour": 3600,
-        "day": 86400,
-        "btu": 1055.056,
-    }
 
-    @staticmethod
-    def get_prefix(text):
-        for prefix in SIUnitHelper.prefixes.keys():
-            if prefix in text.upper():
-                return prefix
 
-    @staticmethod
+# TODO: migrate the below helper functions into the drawing module, since it is specific to that module
-    def get_prefix_multiplier(text):
-        if not text:
-            return 1
-        prefix = SIUnitHelper.get_prefix(text)
-        if prefix:
-            return SIUnitHelper.prefixes[prefix]
-        return 1
-
-    @staticmethod
-    def get_unit_name(text):
-        for name in SIUnitHelper.unit_names:
-            if name in text.upper().replace("METER", "METRE"):
-                return name
-
-    @staticmethod
-    def convert(value, from_prefix, from_unit, to_prefix, to_unit):
-        """Converts between length, area, and volume units
-
-        :param value: The numeric value you want to convert
-        :type value: float
-        :param from_prefix: A prefix from IfcSIPrefix. Can be None.
-        :type from_prefix: string
-        :param from_unit: IfcSIUnitName or IfcConversionBasedUnit.Name
-        :type from_unit: string
-        :param to_prefix: A prefix from IfcSIPrefix. Can be None.
-        :type to_prefix: string
-        :param to_unit: IfcSIUnitName or IfcConversionBasedUnit.Name
-        :type to_unit: string
-        """
-        if from_unit in SIUnitHelper.si_conversions:
-            value *= SIUnitHelper.si_conversions[from_unit]
-        elif from_prefix:
-            value *= SIUnitHelper.get_prefix_multiplier(from_prefix)
-            if "SQUARE" in from_unit:
-                value *= SIUnitHelper.get_prefix_multiplier(from_prefix)
-            elif "CUBIC" in from_unit:
-                value *= SIUnitHelper.get_prefix_multiplier(from_prefix)
-                value *= SIUnitHelper.get_prefix_multiplier(from_prefix)
-        if to_unit in SIUnitHelper.si_conversions:
-            return value * (1 / SIUnitHelper.si_conversions[to_unit])
-        elif to_prefix:
-            value *= 1 / SIUnitHelper.get_prefix_multiplier(to_prefix)
-            if "SQUARE" in from_unit:
-                value *= 1 / SIUnitHelper.get_prefix_multiplier(to_prefix)
-            elif "CUBIC" in from_unit:
-                value *= 1 / SIUnitHelper.get_prefix_multiplier(to_prefix)
-                value *= 1 / SIUnitHelper.get_prefix_multiplier(to_prefix)
-        return value
 
 
 # This function stolen from https://github.com/kevancress/MeasureIt_ARCH/blob/dcf607ce0896aa2284463c6b4ae9cd023fc54cbe/measureit_arch_baseclass.py
@@ -302,7 +211,7 @@ def parse_diagram_scale(camera):
 def get_project_collection(scene):
     """Get main project collection"""
 
-    colls = [c for c in scene.collection.children if c.name.startswith('IfcProject')]
+    colls = [c for c in scene.collection.children if c.name.startswith("IfcProject")]
     if len(colls) != 1:
         raise RuntimeError("project collection missing or not unique")
     return colls[0]
@@ -315,7 +224,7 @@ def get_active_drawing(scene):
         return None, None
     try:
         drawing = props.drawings[props.active_drawing_index]
-        return scene.collection.children['Views'].children[f"IfcGroup/{drawing.name}"], drawing.camera
+        return scene.collection.children["Views"].children[f"IfcGroup/{drawing.name}"], drawing.camera
     except (KeyError, IndexError):
         raise RuntimeError("missing drawing collection")
 
@@ -333,8 +242,8 @@ def ortho_view_frame(camera, margin=0.015):
     """
     aspect = camera.BIMCameraProperties.raster_y / camera.BIMCameraProperties.raster_x
     size = camera.ortho_scale
-    hwidth = size * .5
+    hwidth = size * 0.5
-    hheight = size * .5 * aspect
+    hheight = size * 0.5 * aspect
     scale = parse_diagram_scale(camera)
     xmarg = margin * scale
     ymarg = margin * scale * aspect

src/blenderbim/blenderbim/bim/module/sequence/helper.py

@@ -1,3 +1,5 @@
+import isodate
+from dateutil import parser
 from ifcopenshell.api.sequence.data import Data
 
 
@@ -18,3 +20,19 @@ def derive_date(ifc_definition_id, attribute_name, date=None, is_earliest=False,
             if current_date and (date is None or current_date > date):
                 date = current_date
     return date
+
+
+def parse_datetime(value):
+    try:
+        return parser.isoparse(value)
+    except:
+        try:
+            return parser.parse(value, dayfirst=True, fuzzy=True)
+        except:
+            return None
+
+def parse_duration(value):
+    try:
+        return isodate.parse_duration(value)
+    except:
+        return None

src/blenderbim/blenderbim/bim/module/sequence/operator.py

@@ -8,6 +8,7 @@ import pystache
 import webbrowser
 import ifcopenshell.api
 import ifcopenshell.util.date
+import blenderbim.bim.helper
 import blenderbim.bim.module.sequence.helper as helper
 from datetime import datetime
 from datetime import timedelta
@@ -33,15 +34,7 @@ class EditWorkPlan(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkPlanProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.work_plan_attributes, self.export_attributes)
-        for attribute in props.work_plan_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_work_plan",
@@ -52,6 +45,14 @@ class EditWorkPlan(bpy.types.Operator):
         bpy.ops.bim.disable_editing_work_plan()
         return {"FINISHED"}
 
+    def export_attributes(self, attributes, prop):
+        if "Date" in prop.name or "Time" in prop.name:
+            attributes[prop.name] = helper.parse_datetime(prop.string_value)
+            return True
+        elif prop.name == "Duration" or prop.name == "TotalFloat":
+            attributes[prop.name] = helper.parse_duration(prop.string_value)
+            return True
+
 
 class RemoveWorkPlan(bpy.types.Operator):
     bl_idname = "bim.remove_work_plan"
@@ -77,27 +78,17 @@ class EnableEditingWorkPlan(bpy.types.Operator):
 
         data = Data.work_plans[self.work_plan]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkPlan").all_attributes():
+        blenderbim.bim.helper.import_attributes("IfcWorkPlan", props.work_plan_attributes, data, self.import_attributes)
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+
-            if data_type == "entity":
-                continue
-            new = props.work_plan_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if attribute.name() in ["CreationDate", "StartTime", "FinishTime"]:
-                new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
-            elif data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
         props.active_work_plan_id = self.work_plan
         props.editing_type = "ATTRIBUTES"
         return {"FINISHED"}
 
+    def import_attributes(self, name, prop, data):
+        if name in ["CreationDate", "StartTime", "FinishTime"]:
+            prop.string_value = "" if prop.is_null else data[name].isoformat()
+            return True
+
 
 class DisableEditingWorkPlan(bpy.types.Operator):
     bl_idname = "bim.disable_editing_work_plan"
@@ -176,15 +167,7 @@ class EditWorkSchedule(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkScheduleProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.work_schedule_attributes, self.export_attributes)
-        for attribute in props.work_schedule_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_work_schedule",
@@ -195,6 +178,14 @@ class EditWorkSchedule(bpy.types.Operator):
         bpy.ops.bim.disable_editing_work_schedule()
         return {"FINISHED"}
 
+    def export_attributes(self, attributes, prop):
+        if "Date" in prop.name or "Time" in prop.name:
+            attributes[prop.name] = helper.parse_datetime(prop.string_value)
+            return True
+        elif prop.name == "Duration" or prop.name == "TotalFloat":
+            attributes[prop.name] = helper.parse_duration(prop.string_value)
+            return True
+
 
 class RemoveWorkSchedule(bpy.types.Operator):
     bl_idname = "bim.remove_work_schedule"
@@ -227,23 +218,14 @@ class EnableEditingWorkSchedule(bpy.types.Operator):
     def enable_editing_work_schedule(self):
         data = Data.work_schedules[self.work_schedule]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkSchedule").all_attributes():
+        blenderbim.bim.helper.import_attributes(
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            "IfcWorkSchedule", self.props.work_schedule_attributes, data, self.import_attributes
-            if data_type == "entity":
+        )
-                continue
+
-            new = self.props.work_schedule_attributes.add()
+    def import_attributes(self, name, prop, data):
-            new.name = attribute.name()
+        if name in ["CreationDate", "StartTime", "FinishTime"]:
-            new.is_null = data[attribute.name()] is None
+            prop.string_value = "" if prop.is_null else data[name].isoformat()
-            new.is_optional = attribute.optional()
+            return True
-            new.data_type = data_type
-            if attribute.name() in ["CreationDate", "StartTime", "FinishTime"]:
-                new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
-            elif data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
 
 
 class EnableEditingTasks(bpy.types.Operator):
@@ -439,39 +421,21 @@ class EnableEditingTaskTime(bpy.types.Operator):
 
         data = Data.task_times[task_time_id]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcTaskTime").all_attributes():
+        blenderbim.bim.helper.import_attributes("IfcTaskTime", props.task_time_attributes, data, self.import_attributes)
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            new = props.task_time_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if data_type == "string":
-                if isinstance(data[attribute.name()], datetime):
-                    new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
-                elif isinstance(data[attribute.name()], isodate.Duration):
-                    new.string_value = (
-                        ""
-                        if new.is_null
-                        else ifcopenshell.util.date.datetime2ifc(data[attribute.name()], "IfcDuration")
-                    )
-                else:
-                    new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "boolean":
-                new.bool_value = False if new.is_null else data[attribute.name()]
-            elif data_type == "float":
-                new.float_value = 0.0 if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
         props.active_task_time_id = task_time_id
         props.active_task_id = self.task
         props.editing_task_type = "TASKTIME"
         return {"FINISHED"}
 
+    def import_attributes(self, name, prop, data):
+        if prop.data_type == "string":
+            if isinstance(data[name], datetime):
+                prop.string_value = "" if prop.is_null else data[name].isoformat()
+                return True
+            elif isinstance(data[name], isodate.Duration):
+                prop.string_value = "" if prop.is_null else ifcopenshell.util.date.datetime2ifc(data[name], "IfcDuration")
+                return True
+
     def add_task_time(self):
         task_time = ifcopenshell.api.run("sequence.add_task_time", self.file, task=self.file.by_id(self.task))
         Data.load(IfcStore.get_file())
@@ -484,20 +448,7 @@ class EditTaskTime(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkScheduleProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.task_time_attributes, self.export_attributes)
-        for attribute in props.task_time_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "boolean":
-                    attributes[attribute.name] = attribute.bool_value
-                elif attribute.data_type == "float":
-                    attributes[attribute.name] = attribute.float_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
-
         attributes = self.convert_strings_to_date_times(attributes)
 
         self.file = IfcStore.get_file()
@@ -511,21 +462,13 @@ class EditTaskTime(bpy.types.Operator):
         bpy.ops.bim.load_task_properties(task=props.active_task_id)
         return {"FINISHED"}
 
-    def convert_strings_to_date_times(self, attributes):
+    def export_attributes(self, attributes, prop):
-        for key, value in attributes.items():
+        if "Start" in prop.name or "Finish" in prop.name or prop.name == "StatusTime":
-            if not value:
+            attributes[prop.name] = helper.parse_datetime(value)
-                continue
+            return True
-            if "Start" in key or "Finish" in key or key == "StatusTime":
+        elif prop.name == "ScheduleDuration":
-                try:
+            attributes[prop.name] = helper.parse_duration(value)
-                    attributes[key] = parser.isoparse(value)
+            return True
-                except:
-                    try:
-                        attributes[key] = parser.parse(value, dayfirst=True, fuzzy=True)
-                    except:
-                        attributes[key] = None
-            elif key == "ScheduleDuration":
-                attributes[key] = isodate.parse_duration(value)
-        return attributes
 
 
 class EnableEditingTask(bpy.types.Operator):
@@ -540,25 +483,7 @@ class EnableEditingTask(bpy.types.Operator):
 
         data = Data.tasks[self.task]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcTask").all_attributes():
+        blenderbim.bim.helper.import_attributes("IfcTask", props.task_attributes, data)
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            new = props.task_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "boolean":
-                new.bool_value = False if new.is_null else data[attribute.name()]
-            elif data_type == "integer":
-                new.int_value = 0 if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
         props.active_task_id = self.task
         props.editing_task_type = "ATTRIBUTES"
         return {"FINISHED"}
@@ -580,19 +505,7 @@ class EditTask(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkScheduleProperties
-        attributes = {}
+        attributes = blenderbim.bim.export_attributes(props.task_attributes)
-        for attribute in props.task_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "boolean":
-                    attributes[attribute.name] = attribute.bool_value
-                elif attribute.data_type == "integer":
-                    attributes[attribute.name] = attribute.int_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_task", self.file, **{"task": self.file.by_id(props.active_task_id), "attributes": attributes}
@@ -778,15 +691,7 @@ class EditWorkCalendar(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkCalendarProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.work_calendar_attributes)
-        for attribute in props.work_calendar_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_work_calendar",
@@ -824,21 +729,7 @@ class EnableEditingWorkCalendar(bpy.types.Operator):
 
         data = Data.work_calendars[self.work_calendar]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkCalendar").all_attributes():
+        blenderbim.bim.helper.import_attributes("IfcWorkCalendar", self.props.work_calendar_attributes, data)
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            new = self.props.work_calendar_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
         self.props.active_work_calendar_id = self.work_calendar
         self.props.editing_type = "ATTRIBUTES"
         return {"FINISHED"}
@@ -936,29 +827,20 @@ class EnableEditingWorkTime(bpy.types.Operator):
 
         data = Data.work_times[self.work_time]
 
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkTime").all_attributes():
+        blenderbim.bim.helper.import_attributes(
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            "IfcWorkTime", self.props.work_time_attributes, data, self.import_attributes
-            if data_type == "entity":
+        )
-                continue
-            new = self.props.work_time_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if attribute.name() in ["Start", "Finish"]:
-                new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
-            elif data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
 
         self.initialise_recurrence_components()
         self.load_recurrence_pattern_data(data)
         self.props.active_work_time_id = self.work_time
         return {"FINISHED"}
 
+    def import_attributes(self, name, prop, data):
+        if name in ["Start", "Finish"]:
+            prop.string_value = "" if prop.is_null else data[name].isoformat()
+            return True
+
     def initialise_recurrence_components(self):
         if len(self.props.day_components) == 0:
             for i in range(0, 31):
@@ -1014,15 +896,7 @@ class EditWorkTime(bpy.types.Operator):
 
     def execute(self, context):
         self.props = context.scene.BIMWorkCalendarProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(self.props.work_time_attributes)
-        for attribute in self.props.work_time_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_work_time",
@@ -1251,21 +1125,7 @@ class EnableEditingSequenceAttributes(bpy.types.Operator):
 
     def enable_editing_sequence_attributes(self):
         data = Data.sequences[self.sequence]
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcRelSequence").all_attributes():
+        blenderbim.bim.helper.import_attributes("IfcRelSequence", self.props.sequence_attributes, data)
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            new = self.props.sequence_attributes.add()
-            new.name = attribute.name()
-            new.is_null = data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
 
 
 class EnableEditingSequenceTimeLag(bpy.types.Operator):
@@ -1285,34 +1145,24 @@ class EnableEditingSequenceTimeLag(bpy.types.Operator):
 
     def enable_editing_attributes(self):
         data = Data.lag_times[self.lag_time]
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcLagTime").all_attributes():
+        blenderbim.bim.helper.import_attributes(
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            "IfcLagTime", self.props.time_lag_attributes, data, self.import_attributes
-            if data_type == "entity":
+        )
-                continue
+
-            new = self.props.time_lag_attributes.add()
+    def import_attributes(self, name, prop, data):
-            new.name = attribute.name()
+        if name == "LagValue":
-            new.is_null = data[attribute.name()] is None
+            if isinstance(data[name], isodate.Duration):
-            new.is_optional = attribute.optional()
+                prop.data_type = "string"
-            new.data_type = data_type
+                prop.string_value = (
-            if attribute.name() == "LagValue":
+                    ""
-                if isinstance(data[attribute.name()], isodate.Duration):
+                    if prop.is_null
-                    new.data_type = "string"
+                    else ifcopenshell.util.date.datetime2ifc(data[name], "IfcDuration")
-                    new.string_value = (
+                )
-                        ""
+                return True
-                        if new.is_null
+            else:
-                        else ifcopenshell.util.date.datetime2ifc(data[attribute.name()], "IfcDuration")
+                prop.data_type = "float"
-                    )
+                prop.float_value = 0.0 if prop.is_null else data[name]
-                else:
+                return True
-                    new.data_type = "float"
-                    new.float_value = 0.0 if new.is_null else data[attribute.name()]
-            elif data_type == "string":
-                new.string_value = "" if new.is_null else data[attribute.name()]
-            elif data_type == "float":
-                new.float_value = 0.0 if new.is_null else data[attribute.name()]
-            elif data_type == "enum":
-                new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
-                if data[attribute.name()]:
-                    new.enum_value = data[attribute.name()]
 
 
 class UnassignLagTime(bpy.types.Operator):
@@ -1351,15 +1201,7 @@ class EditSequenceAttributes(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkScheduleProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.sequence_attributes)
-        for attribute in props.sequence_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_sequence",
@@ -1378,17 +1220,7 @@ class EditSequenceTimeLag(bpy.types.Operator):
 
     def execute(self, context):
         props = context.scene.BIMWorkScheduleProperties
-        attributes = {}
+        attributes = blenderbim.bim.helper.export_attributes(props.time_lag_attributes)
-        for attribute in props.time_lag_attributes:
-            if attribute.is_null:
-                attributes[attribute.name] = None
-            else:
-                if attribute.data_type == "string":
-                    attributes[attribute.name] = attribute.string_value
-                elif attribute.data_type == "float":
-                    attributes[attribute.name] = attribute.float_value
-                elif attribute.data_type == "enum":
-                    attributes[attribute.name] = attribute.enum_value
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "sequence.edit_lag_time",

src/ifcopenshell-python/ifcopenshell/api/sequence/edit_task_time.py

@@ -10,10 +10,9 @@ class Usecase:
 
     def execute(self):
         for name, value in self.settings["attributes"].items():
-            if "Start" in name or "Finish" in name or name == "StatusTime":
+            if value:
-                if value:
+                if "Start" in name or "Finish" in name or name == "StatusTime":
                     value = ifcopenshell.util.date.datetime2ifc(value, "IfcDateTime")
-            if name == "ScheduleDuration":
+                elif name == "ScheduleDuration":
-                if value:
                     value = ifcopenshell.util.date.datetime2ifc(value, "IfcDuration")
             setattr(self.settings["task_time"], name, value)

src/ifcopenshell-python/ifcopenshell/api/sequence/edit_work_plan.py

@@ -1,3 +1,6 @@
+import ifcopenshell.util.date
+
+
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
@@ -7,4 +10,9 @@ class Usecase:
 
     def execute(self):
         for name, value in self.settings["attributes"].items():
+            if value:
+                if "Date" in name or "Time" in name:
+                    value = ifcopenshell.util.date.datetime2ifc(value, "IfcDateTime")
+                elif name == "Duration" or name == "TotalFloat":
+                    value = ifcopenshell.util.date.datetime2ifc(value, "IfcDuration")
             setattr(self.settings["work_plan"], name, value)

src/ifcopenshell-python/ifcopenshell/api/sequence/edit_work_schedule.py

@@ -1,3 +1,6 @@
+import ifcopenshell.util.date
+
+
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
@@ -7,4 +10,9 @@ class Usecase:
 
     def execute(self):
         for name, value in self.settings["attributes"].items():
+            if value:
+                if "Date" in name or "Time" in name:
+                    value = ifcopenshell.util.date.datetime2ifc(value, "IfcDateTime")
+                elif name == "Duration" or name == "TotalFloat":
+                    value = ifcopenshell.util.date.datetime2ifc(value, "IfcDuration")
             setattr(self.settings["work_schedule"], name, value)