First attempt at ripping out agnostic code into ifcopenshell.api namespace. See #1399.

src/ifcopenshell-python/ifcopenshell/api/pset_template/add_prop_template.py

@@ -0,0 +1,22 @@
+import ifcopenshell
+
+
+class Usecase:
+    def __init__(self, file, settings={}):
+        self.file = file
+        self.settings = {"pset_template": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        prop_template = self.file.create_entity("IfcSimplePropertyTemplate", **{
+            "GlobalId": ifcopenshell.guid.new(),
+            "Name": "NewProperty",
+            "PrimaryMeasureType": "IfcLabel",
+            "TemplateType": "P_SINGLEVALUE",
+            "AccessState": "READWRITE"
+        })
+        has_property_templates = list(self.settings["pset_template"].HasPropertyTemplates or [])
+        has_property_templates.append(prop_template)
+        self.settings["pset_template"].HasPropertyTemplates = has_property_templates
+        return prop_template

src/ifcopenshell-python/ifcopenshell/api/pset_template/add_pset_template.py

@@ -0,0 +1,17 @@
+import ifcopenshell
+
+
+class Usecase:
+    def __init__(self, file, settings={}):
+        self.file = file
+        self.settings = {}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        self.file.create_entity("IfcPropertySetTemplate", **{
+            "GlobalId": ifcopenshell.guid.new(),
+            "Name": "New_Pset",
+            "TemplateType": "PSET_TYPEDRIVENONLY",
+            "ApplicableEntity": "IfcTypeObject"
+        })

src/ifcopenshell-python/ifcopenshell/api/pset_template/data.py

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+class Data:
+    is_loaded = False
+    pset_templates = {}
+    prop_templates = {}
+
+    @classmethod
+    def purge(cls):
+        cls.is_loaded = False
+        cls.pset_templates = {}
+        cls.prop_templates = {}
+
+    @classmethod
+    def load(cls, file):
+        cls._file = file
+
+        cls.pset_templates = {}
+        cls.prop_templates = {}
+
+        for pset_template in cls._file.by_type("IfcPropertySetTemplate"):
+            data = pset_template.get_info()
+            data["HasPropertyTemplates"] = [e.id() for e in pset_template.HasPropertyTemplates or []]
+            if "OwnerHistory" in data:
+                del data["OwnerHistory"]
+            cls.pset_templates[pset_template.id()] = data
+
+        for prop_template in cls._file.by_type("IfcSimplePropertyTemplate"):
+            data = prop_template.get_info()
+            cls.prop_templates[prop_template.id()] = {
+                "GlobalId": data["GlobalId"],
+                "Name": data["Name"],
+                "Description": data["Description"],
+                "PrimaryMeasureType": data["PrimaryMeasureType"]
+            }
+        cls.is_loaded = True

src/ifcopenshell-python/ifcopenshell/api/pset_template/edit_prop_template.py

@@ -0,0 +1,10 @@
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {"prop_template": None, "attributes": {}}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for name, value in self.settings["attributes"].items():
+            setattr(self.settings["prop_template"], name, value)

src/ifcopenshell-python/ifcopenshell/api/pset_template/edit_pset_template.py

@@ -0,0 +1,10 @@
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {"pset_template": None, "attributes": {}}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for name, value in self.settings["attributes"].items():
+            setattr(self.settings["pset_template"], name, value)

src/ifcopenshell-python/ifcopenshell/api/pset_template/remove_prop_template.py

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+import ifcopenshell.util.element
+
+
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {
+            "prop_template": None
+        }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for inverse in self.file.get_inverse(self.settings["prop_template"]):
+            if len(inverse.HasPropertyTemplates) == 1:
+                inverse.HasPropertyTemplates = []
+            else:
+                has_property_templates = list(inverse.HasPropertyTemplates)
+                has_property_templates.remove(self.settings["prop_template"])
+                inverse.HasPropertyTemplates = has_property_templates
+        ifcopenshell.util.element.remove_deep(self.file, self.settings["prop_template"])

src/ifcopenshell-python/ifcopenshell/api/pset_template/remove_pset_template.py

@@ -0,0 +1,14 @@
+import ifcopenshell.util.element
+
+
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {
+            "pset_template": None
+        }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        ifcopenshell.util.element.remove_deep(self.file, self.settings["pset_template"])