
# Slixmpp: The Slick XMPP Library
# Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.
from slixmpp.stanza import Error
from slixmpp.xmlstream import ElementBase, ET, register_stanza_plugin


class LegacyError(ElementBase):

    """
    Older XMPP implementations used code based error messages, similar
    to HTTP response codes. Since then, error condition elements have
    been introduced. XEP-0086 provides a mapping between the new
    condition elements and a combination of error types and the older
    response codes.

    Also see <http://xmpp.org/extensions/xep-0086.html>.

    Example legacy error stanzas:
    ::

        <error xmlns="jabber:client" code="501" type="cancel">
          <feature-not-implemented
                xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" />
        </error>

        <error code="402" type="auth">
          <payment-required
                xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" />
        </error>

    :var error_map: A map of error conditions to error types and
                    code values.
    """

    name = 'legacy'
    namespace = Error.namespace
    plugin_attrib = name
    interfaces = {'condition'}
    overrides = ['set_condition']

    error_map = {'bad-request': ('modify', '400'),
                 'conflict': ('cancel', '409'),
                 'feature-not-implemented': ('cancel', '501'),
                 'forbidden': ('auth', '403'),
                 'gone': ('modify', '302'),
                 'internal-server-error': ('wait', '500'),
                 'item-not-found': ('cancel', '404'),
                 'jid-malformed': ('modify', '400'),
                 'not-acceptable': ('modify', '406'),
                 'not-allowed': ('cancel', '405'),
                 'not-authorized': ('auth', '401'),
                 'payment-required': ('auth', '402'),
                 'recipient-unavailable': ('wait', '404'),
                 'redirect': ('modify', '302'),
                 'registration-required': ('auth', '407'),
                 'remote-server-not-found': ('cancel', '404'),
                 'remote-server-timeout': ('wait', '504'),
                 'resource-constraint': ('wait', '500'),
                 'service-unavailable': ('cancel', '503'),
                 'subscription-required': ('auth', '407'),
                 'undefined-condition': (None, '500'),
                 'unexpected-request': ('wait', '400')}

    def setup(self, xml):
        """Don't create XML for the plugin."""
        self.xml = ET.Element('')

    def set_condition(self, value):
        """
        Set the error type and code based on the given error
        condition value.

        :param value: The new error condition.
        """
        self.parent().set_condition(value)

        error_data = self.error_map.get(value, None)
        if error_data is not None:
            if error_data[0] is not None:
                self.parent()['type'] = error_data[0]
            self.parent()['code'] = error_data[1]
