F copy entity

Summary

Function to copy an entity.

Note to reviewer: This MR depends on f-merge-entities.

Test Environment

There is a unit test.

Check List for the Author

• All automated tests pass
• Reference related Issues
• Up-to-date CHANGELOG.md
• Add type hints in created/changed code
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there spezifications? Are they satisfied?

For further good practices have a look at our review guidelines.

src/caosdb/apiutils.py

@@ -557,7 +557,7 @@ def getCommitIn(folder):
         return t.readline().strip()
 
 
-COMPARED = ["name", "role", "datatype", "description", "importance",
+COMPARED = ["name", "role", "datatype", "description",
             "id", "path", "checksum", "size"]
 
 
@@ -673,6 +673,45 @@ def compare_entities(old_entity: Entity, new_entity: Entity):
     return (olddiff, newdiff)
 
 
+def copy_entity(entity: Entity):
+    """
+    Return a copy of entity.
+
+    If deep == True return a deep copy, recursively copying all sub entities.
+    """
+    print(entity)
+    if entity.role == "File":
+        new = File()
+    elif entity.role == "Property":
+        new = Property()
+    elif entity.role == "RecordType":
+        new = RecordType()
+    elif entity.role == "Record":
+        new = Record()
+    elif entity.role == "Entity":
+        new = Entity()
+    else:
+        raise RuntimeError("Unkonwn role.")
+
+    # Copy special attributes:
+    # TODO: this might rise an exception when copying
+    #       special file attributes like checksum and size.
+    for attribute in COMPARED + ["value"]:
+        val = getattr(entity, attribute)
+        if val is not None:
+            setattr(new, attribute, val)
+
+    # Copy parents:
+    for p in entity.parents:
+        new.add_parent(p)
+
+    # Copy properties:
+    for p in entity.properties:
+        new.add_property(p, importance=entity.get_importance(p))
+
+    return new
+
+
 def describe_diff(olddiff, newdiff, name=None, as_update=True):
     description = ""