THREAD_ATTRIBUTES = ['id', 'status_id', 'priority', 'date_created', 'subject_line']
MESSAGE_ATTRIBUTES = ['id', 'thread_id', 'msg_from', 'msg_to', 'message', 'html']

def thread_attributes(thread, expand=[]):
    attr_values = {}
    for attr_name in THREAD_ATTRIBUTES:
        attr_values[attr_name] = getattr(thread, attr_name)
    if 'messages' in expand:
        attr_values['messages'] = message_attributes_list(thread.messages)
    return attr_values


def thread_attributes_list(threads, expand=[]):
    attrs_list = []
    for thread in threads:
        attrs_list.append(thread_attributes(thread, expand))
    return attrs_list


def message_attributes(message):
    attr_values = {}
    for attr_name in MESSAGE_ATTRIBUTES:
        attr_values[attr_name] = getattr(message, attr_name)
    return attr_values


def message_attributes_list(messages):
    attrs_list = []
    for message in messages:
        attrs_list.append(message_attributes(message))
    return attrs_list