###
# Copyright (c) 2005, Daniel DiPaolo
# Copyright (c) 2010, James Vega
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

import supybot.ircdb as ircdb
import supybot.utils as utils
from supybot.commands import *
import supybot.ircmsgs as ircmsgs
import supybot.callbacks as callbacks
from supybot.i18n import PluginInternationalization, internationalizeDocstring
_ = PluginInternationalization('Anonymous')

@internationalizeDocstring
class Anonymous(callbacks.Plugin):
    """This plugin allows users to act through the bot anonymously.  The 'do'
    command has the bot perform an anonymous action in a given channel, and
    the 'say' command allows other people to speak through the bot.  Since
    this can be fairly well abused, you might want to set
    supybot.plugins.Anonymous.requireCapability so only users with that
    capability can use this plugin.  For extra security, you can require that
    the user be *in* the channel they are trying to address anonymously with
    supybot.plugins.Anonymous.requirePresenceInChannel, or you can require
    that the user be registered by setting
    supybot.plugins.Anonymous.requireRegistration.
    """
    def _preCheck(self, irc, msg, target, action):
        if self.registryValue('requireRegistration'):
            try:
                _ = ircdb.users.getUser(msg.prefix)
            except KeyError:
                irc.errorNotRegistered(Raise=True)
        capability = self.registryValue('requireCapability')
        if capability:
            if not ircdb.checkCapability(msg.prefix, capability):
                irc.errorNoCapability(capability, Raise=True)
        if irc.isChannel(target):
            if self.registryValue('requirePresenceInChannel', target) and \
               msg.nick not in irc.state.channels[target].users:
                irc.error(format('You must be in %s to %q in there.',
                                 target, action), Raise=True)
            c = ircdb.channels.getChannel(target)
            if c.lobotomized:
                irc.error(format('I\'m lobotomized in %s.', target),
                          Raise=True)
            if not c._checkCapability(self.name()):
                irc.error('That channel has set its capabilities so as to '
                          'disallow the use of this plugin.', Raise=True)
        elif action == 'say' and not self.registryValue('allowPrivateTarget'):
            irc.error(format('%q cannot be used to send private messages.',
                             action),
                      Raise=True)

    @internationalizeDocstring
    def say(self, irc, msg, args, target, text):
        """<channel|nick> <text>

        Sends <text> to <channel|nick>.  Can only send to <nick> if
        supybot.plugins.Anonymous.allowPrivateTarget is True.
        """
        self._preCheck(irc, msg, target, 'say')
        self.log.info('Saying %q to %s due to %s.',
                      text, target, msg.prefix)
        irc.queueMsg(ircmsgs.privmsg(target, text))
        irc.noReply()
    say = wrap(say, [first('nick', 'inChannel'), 'text'])

    @internationalizeDocstring
    def do(self, irc, msg, args, channel, text):
        """<channel> <action>

        Performs <action> in <channel>.
        """
        self._preCheck(irc, msg, channel, 'do')
        self.log.info('Performing %q in %s due to %s.',
                      text, channel, msg.prefix)
        irc.queueMsg(ircmsgs.action(channel, text))
        irc.noReply()
    do = wrap(do, ['inChannel', 'text'])

Class = Anonymous


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