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from email.utils import parseaddr
def generate_recipients(sender, to, ccs, current_user):
result = {'single': None, 'all': {'to-field': [], 'cc-field': []}}
to.append(sender)
to = remove_duplicates(to)
ccs = remove_duplicates(ccs)
result['single'] = swap_recipient_if_needed(
sender, remove_address(to, current_user), current_user)
result['all'][
'to-field'] = remove_address(to, current_user) if len(to) > 1 else to
result['all'][
'cc-field'] = remove_address(ccs, current_user) if len(ccs) > 1 else ccs
return result
def remove_duplicates(recipients):
return list(set(recipients))
def remove_address(recipients, current_user):
return [recipient for recipient in recipients if not parsed_mail_matches(recipient, current_user)]
def parsed_mail_matches(to_parse, expected):
return parseaddr(to_parse)[1] == expected
def swap_recipient_if_needed(sender, recipients, current_user):
if len(recipients) == 1 and parsed_mail_matches(sender, current_user):
return recipients[0]
return sender
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