from . import imap
from . import interface
from . import hooks

def on_email(content, hooks):
    print('on_email:', content)
    context = {}
    try:
        for hook in hooks:
            context, content = hook(context, content)
    except interface.HookStopIteration():
        pass
    print('now, raising exception')
    raise interface.HookAbortError()

def main():
    # TODO: how to load hooks with a dependency tree and sort them accordingly
    # to generate hooks list ?
    # now try a fixed list ?
    hooks = (
            hook_check_ml_restrictions, # open/private ml
            hook_validate_poster,
            hook_process_subscribe_queries,
            hook_generate_rcpt_list,
            hook_send_all,
    )
    print('starting imap.main loop')
    try:
        imap.main(lambda content: on_mail(content, hooks))
    except KeyboardInterrupt:
        pass
    print('end of main imap loop')