def get_backlinks(db_handle: DbReadBase, handle: Handle) -> Dict[str, List[Handle]]:
"""Get backlinks to a handle.
Will return a dictionary of the form
`{'object_type': ['handle1', 'handle2', ...], ...}`
"""
backlinks = {}
for obj_type, target_handle in db_handle.find_backlink_handles(handle):
key = obj_type.lower()
if key not in backlinks:
backlinks[key] = []
backlinks[key].append(target_handle)
return backlinks
def get_event_participants_for_handle(
db_handle: DbReadBase,
handle: Handle,
locale: GrampsLocale = glocale,
) -> Dict:
"""Get event participants given a handle."""
result = {"people": [], "families": []}
seen = set() # to avoid duplicates
for class_name, backref_handle in db_handle.find_backlink_handles(
handle, include_classes=["Person", "Family"]
):
if backref_handle in seen:
continue
seen.add(backref_handle)
if class_name == "Person":
person = db_handle.get_person_from_handle(backref_handle)
if not person:
continue
for event_ref in person.get_event_ref_list():
if handle == event_ref.ref:
result["people"].append(
{
"role": locale.translation.sgettext(
event_ref.get_role().xml_str()
),
"person": get_person_profile_for_handle(
db_handle, backref_handle, args=[], locale=locale
),
}
)
elif class_name == "Family":
family = db_handle.get_family_from_handle(backref_handle)
if not family:
continue
for event_ref in family.get_event_ref_list():
if handle == event_ref.ref:
result["families"].append(
{
"role": locale.translation.sgettext(
event_ref.get_role().xml_str()
),
"family": get_family_profile_for_handle(
db_handle, backref_handle, args=[], locale=locale
),
}
)
return result
