def send_friend_request(sender_id, friend_id):
result = enki.libutil.ENKILIB_OK
if friend_id != sender_id: # friend is not me
if not exist_EnkiFriends_by_friends(
sender_id, friend_id): # we're not currently friends
already_invited = enki.libmessage.get_key_EnkiMessage_by_sender_recipient(
friend_id, sender_id)
if already_invited:
# if an invite from the potential friend already exists, add the pair of friends immediately and delete the invite(s)
add_friend(sender_id, friend_id)
result = INFO_FRIENDS
# send an invitation to friend (unless it's a duplicate)
elif not enki.libmessage.exist_EnkiMessage_by_sender_recipient(
sender_id, friend_id):
message = EnkiModelMessage(sender=sender_id,
recipient=friend_id,
type='friend_request')
message.put()
else:
result = enki.libdisplayname.ERROR_DISPLAY_NAME_INVALID
return result
