<commit_before>"""
This module implements DBus message matching for routing messages
to interested connections.

@author: <NAME>
"""
import six
from twisted.python import log

# XXX Replace this simple, inefficient implementation with something a bit
# smarter

_mtypes = {'method_call': 1,
           'method_return': 2,
           'error': 3,
           'signal': 4}


class Rule (object):
    """
    Represents a single match rule
    """

    def __init__(self, callback, _id, router):
        self.callback = callback
        self.id = _id
        self.router = router
        self.simple = []

    def add(self, key, value):
        # if key in ('mtype', 'sender', 'interface', 'member', 'path',
        # 'destination'):
        if key in ('mtype', 'interface', 'member', 'path', 'destination'):
            self.simple.append((key, value))
        else:
            setattr(self, key, value)

    def cancel(self):
        self.router.delMatch(self.id)

    def match(self, m):
        try:
            for k, v in self.simple:
                if getattr(m, k) != v:
                    return

            if hasattr(self, 'path_namespace'):
                # See https://github.com/cocagne/txdbus/issues/62
                # FIXME: Skipping validation for this since we already have an
                # open issue for it:
                if m.path is None or not m.path.startswith(pn):  # noqa
                    return

            if hasattr(self, 'args') and m.body is not None:
                for idx, val in self.args:
                    if idx >= len(m.body) or m.body[idx] != val:
                        return

            if hasattr(self, 'arg_paths') and m.body is not None:
                for idx, val in self.arg_paths:
                    if idx >= len(m.body) or not m.body[idx].startswith(val):
                        return

            # XXX arg0namespace -- Not quite sure how this one works

            # if we get here, we have a match
            self.callback(m)
        except BaseException:
            log.err()


class MessageRouter (object):
    """
    Routes DBus messages to callback functions based on match rules as defined
    by the DBus specificiation
    """

    def __init__(self):
        self._id = 0
        self._rules = {}

    def addMatch(self, callback, mtype=None, sender=None, interface=None,<commit_msg>Fix issue #62 - Invalid name "pn" in router.py.<commit_after>"""
This module implements DBus message matching for routing messages
to interested connections.

@author: <NAME>
"""
import six
from twisted.python import log

# XXX Replace this simple, inefficient implementation with something a bit
# smarter

_mtypes = {'method_call': 1,
           'method_return': 2,
           'error': 3,
           'signal': 4}


class Rule (object):
    """
    Represents a single match rule
    """

    def __init__(self, callback, _id, router):
        self.callback = callback
        self.id = _id
        self.router = router
        self.simple = []

    def add(self, key, value):
        # if key in ('mtype', 'sender', 'interface', 'member', 'path',
        # 'destination'):
        if key in ('mtype', 'interface', 'member', 'path', 'destination'):
            self.simple.append((key, value))
        else:
            setattr(self, key, value)

    def cancel(self):
        self.router.delMatch(self.id)

    def match(self, m):
        try:
            for k, v in self.simple:
                if getattr(m, k) != v:
                    return

            if hasattr(self, 'path_namespace'):
                # See https://github.com/cocagne/txdbus/issues/62
                # FIXME: Skipping validation for this since we already have an
                # open issue for it:
                if m.path is None or not m.path.startswith(self.path_namespace):
                    return

            if hasattr(self, 'args') and m.body is not None:
                for idx, val in self.args:
                    if idx >= len(m.body) or m.body[idx] != val:
                        return

            if hasattr(self, 'arg_paths') and m.body is not None:
                for idx, val in self.arg_paths:
                    if idx >= len(m.body) or not m.body[idx].startswith(val):
                        return

            # XXX arg0namespace -- Not quite sure how this one works

            # if we get here, we have a match
            self.callback(m)
        except BaseException:
            log.err()


class MessageRouter (object):
    """
    Routes DBus messages to callback functions based on match rules as defined
    by the DBus specificiation
    """

    def __init__(self):
        self._id = 0
        self._rules = {}

    def addMatch(self, callback, mtype=None, sender=None, interface=None,
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