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# -*- test-case-name: twisted.words.test -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from zope.interface import Interface, Attribute
class IProtocolPlugin(Interface):
"""Interface for plugins providing an interface to a Words service
"""
name = Attribute("A single word describing what kind of interface this is (eg, irc or web)")
def getFactory(realm, portal):
"""Retrieve a C{twisted.internet.interfaces.IServerFactory} provider
@param realm: An object providing C{twisted.cred.portal.IRealm} and
L{IChatService}, with which service information should be looked up.
@param portal: An object providing C{twisted.cred.portal.IPortal},
through which logins should be performed.
"""
class IGroup(Interface):
name = Attribute("A short string, unique among groups.")
def add(user):
"""Include the given user in this group.
@type user: L{IUser}
"""
def remove(user, reason=None):
"""Remove the given user from this group.
@type user: L{IUser}
@type reason: C{unicode}
"""
def size():
"""Return the number of participants in this group.
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with an C{int} representing the
number of participants in this group.
"""
def receive(sender, recipient, message):
"""
Broadcast the given message from the given sender to other
users in group.
The message is not re-transmitted to the sender.
@param sender: L{IUser}
@type recipient: L{IGroup}
@param recipient: This is probably a wart. Maybe it will be removed
in the future. For now, it should be the group object the message
is being delivered to.
@param message: C{dict}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with None when delivery has been
attempted for all users.
"""
def setMetadata(meta):
"""Change the metadata associated with this group.
@type meta: C{dict}
"""
def iterusers():
"""Return an iterator of all users in this group.
"""
class IChatClient(Interface):
"""Interface through which IChatService interacts with clients.
"""
name = Attribute("A short string, unique among users. This will be set by the L{IChatService} at login time.")
def receive(sender, recipient, message):
"""
Callback notifying this user of the given message sent by the
given user.
This will be invoked whenever another user sends a message to a
group this user is participating in, or whenever another user sends
a message directly to this user. In the former case, C{recipient}
will be the group to which the message was sent; in the latter, it
will be the same object as the user who is receiving the message.
@type sender: L{IUser}
@type recipient: L{IUser} or L{IGroup}
@type message: C{dict}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires when the message has been delivered,
or which fails in some way. If the Deferred fails and the message
was directed at a group, this user will be removed from that group.
"""
def groupMetaUpdate(group, meta):
"""
Callback notifying this user that the metadata for the given
group has changed.
@type group: L{IGroup}
@type meta: C{dict}
@rtype: L{twisted.internet.defer.Deferred}
"""
def userJoined(group, user):
"""
Callback notifying this user that the given user has joined
the given group.
@type group: L{IGroup}
@type user: L{IUser}
@rtype: L{twisted.internet.defer.Deferred}
"""
def userLeft(group, user, reason=None):
"""
Callback notifying this user that the given user has left the
given group for the given reason.
@type group: L{IGroup}
@type user: L{IUser}
@type reason: C{unicode}
@rtype: L{twisted.internet.defer.Deferred}
"""
class IUser(Interface):
"""Interface through which clients interact with IChatService.
"""
realm = Attribute("A reference to the Realm to which this user belongs. Set if and only if the user is logged in.")
mind = Attribute("A reference to the mind which logged in to this user. Set if and only if the user is logged in.")
name = Attribute("A short string, unique among users.")
lastMessage = Attribute("A POSIX timestamp indicating the time of the last message received from this user.")
signOn = Attribute("A POSIX timestamp indicating this user's most recent sign on time.")
def loggedIn(realm, mind):
"""Invoked by the associated L{IChatService} when login occurs.
@param realm: The L{IChatService} through which login is occurring.
@param mind: The mind object used for cred login.
"""
def send(recipient, message):
"""Send the given message to the given user or group.
@type recipient: Either L{IUser} or L{IGroup}
@type message: C{dict}
"""
def join(group):
"""Attempt to join the given group.
@type group: L{IGroup}
@rtype: L{twisted.internet.defer.Deferred}
"""
def leave(group):
"""Discontinue participation in the given group.
@type group: L{IGroup}
@rtype: L{twisted.internet.defer.Deferred}
"""
def itergroups():
"""
Return an iterator of all groups of which this user is a
member.
"""
class IChatService(Interface):
name = Attribute("A short string identifying this chat service (eg, a hostname)")
createGroupOnRequest = Attribute(
"A boolean indicating whether L{getGroup} should implicitly "
"create groups which are requested but which do not yet exist.")
createUserOnRequest = Attribute(
"A boolean indicating whether L{getUser} should implicitly "
"create users which are requested but which do not yet exist.")
def itergroups():
"""Return all groups available on this service.
@rtype: C{twisted.internet.defer.Deferred}
@return: A Deferred which fires with a list of C{IGroup} providers.
"""
def getGroup(name):
"""Retrieve the group by the given name.
@type name: C{str}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with the group with the given
name if one exists (or if one is created due to the setting of
L{IChatService.createGroupOnRequest}, or which fails with
L{twisted.words.ewords.NoSuchGroup} if no such group exists.
"""
def createGroup(name):
"""Create a new group with the given name.
@type name: C{str}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with the created group, or
with fails with L{twisted.words.ewords.DuplicateGroup} if a
group by that name exists already.
"""
def lookupGroup(name):
"""Retrieve a group by name.
Unlike C{getGroup}, this will never implicitly create a group.
@type name: C{str}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with the group by the given
name, or which fails with L{twisted.words.ewords.NoSuchGroup}.
"""
def getUser(name):
"""Retrieve the user by the given name.
@type name: C{str}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with the user with the given
name if one exists (or if one is created due to the setting of
L{IChatService.createUserOnRequest}, or which fails with
L{twisted.words.ewords.NoSuchUser} if no such user exists.
"""
def createUser(name):
"""Create a new user with the given name.
@type name: C{str}
@rtype: L{twisted.internet.defer.Deferred}
@return: A Deferred which fires with the created user, or
with fails with L{twisted.words.ewords.DuplicateUser} if a
user by that name exists already.
"""
__all__ = [
'IGroup', 'IChatClient', 'IUser', 'IChatService',
]
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