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

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

@@ -0,0 +1,65 @@
+class Data:
+    is_loaded = False
+    people = {}
+    organisations = {}
+    addresses = {}
+    roles = {}
+
+    @classmethod
+    def purge(cls):
+        cls.is_loaded = False
+        cls.people = {}
+        cls.organisations = {}
+        cls.addresses = {}
+        cls.roles = {}
+
+    @classmethod
+    def load(cls, file):
+        if not file:
+            return
+        cls.people = {}
+        cls.organisations = {}
+        cls.addresses = {}
+        cls.roles = {}
+        for person in file.by_type("IfcPerson"):
+            data = person.get_info()
+            data["is_engaged"] = bool(person.EngagedIn)
+            cls.people[person.id()] = data
+
+            roles = []
+            if data["Roles"]:
+                for role in data["Roles"]:
+                    roles.append(role.id())
+            data["Roles"] = roles
+
+            addresses = []
+            if data["Addresses"]:
+                for address in data["Addresses"]:
+                    addresses.append(address.id())
+            data["Addresses"] = addresses
+
+        for organisation in file.by_type("IfcOrganization"):
+            data = organisation.get_info()
+            data["is_engaged"] = (
+                bool(organisation.IsRelatedBy) or bool(organisation.Relates) or bool(organisation.Engages)
+            )
+            cls.organisations[organisation.id()] = data
+
+            roles = []
+            if data["Roles"]:
+                for role in data["Roles"]:
+                    roles.append(role.id())
+            data["Roles"] = roles
+
+            addresses = []
+            if data["Addresses"]:
+                for address in data["Addresses"]:
+                    addresses.append(address.id())
+            data["Addresses"] = addresses
+
+        for address in file.by_type("IfcAddress"):
+            cls.addresses[address.id()] = address.get_info()
+
+        for role in file.by_type("IfcActorRole"):
+            cls.roles[role.id()] = role.get_info()
+        cls.is_loaded = True