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import random

import webkitpy.common.config.irc as config_irc

from webkitpy.common.checkout.changelog import view_source_url

from webkitpy.tool.bot.queueengine import TerminateQueue

from webkitpy.common.net.bugzilla import parse_bug_id

from webkitpy.common.system.executive import ScriptError

# FIXME: Merge with Command?

class IRCCommand(object):

    def execute(self, nick, args, tool, sheriff):

        raise NotImplementedError, "subclasses must implement"

class LastGreenRevision(IRCCommand):

    def execute(self, nick, args, tool, sheriff):

        return "%s: %s" % (nick,

            view_source_url(tool.buildbot.last_green_revision()))

class Restart(IRCCommand):

    def execute(self, nick, args, tool, sheriff):

        tool.irc().post("Restarting...")

        raise TerminateQueue()

class Rollout(IRCCommand):

    def execute(self, nick, args, tool, sheriff):

        if len(args) < 2:

            tool.irc().post("%s: Usage: SVN_REVISION REASON" % nick)

            return

        svn_revision = args[0].lstrip("r")

        rollout_reason = " ".join(args[1:])

        tool.irc().post("Preparing rollout for r%s..." % svn_revision)

        try:

            complete_reason = "%s (Requested by %s on %s)." % (

                rollout_reason, nick, config_irc.channel)

            bug_id = sheriff.post_rollout_patch(svn_revision, complete_reason)

            bug_url = tool.bugs.bug_url_for_bug_id(bug_id)

            tool.irc().post("%s: Created rollout: %s" % (nick, bug_url))

        except ScriptError, e:

            tool.irc().post("%s: Failed to create rollout patch:" % nick)

            tool.irc().post("%s" % e)

            bug_id = parse_bug_id(e.output)

            if bug_id:

                tool.irc().post("Ugg...  Might have created %s" %

                    tool.bugs.bug_url_for_bug_id(bug_id))

class Help(IRCCommand):

    def execute(self, nick, args, tool, sheriff):

        return "%s: Available commands: %s" % (nick, ", ".join(commands.keys()))

class Hi(IRCCommand):

    def execute(self, nick, args, tool, sheriff):

        quips = tool.bugs.quips()

        quips.append('"Only you can prevent forest fires." -- Smokey the Bear')

        return random.choice(quips)

class Eliza(IRCCommand):

    therapist = None

    def __init__(self):

        if not self.therapist:

            import webkitpy.thirdparty.autoinstalled.eliza as eliza

            Eliza.therapist = eliza.eliza()

    def execute(self, nick, args, tool, sheriff):

        return "%s: %s" % (nick, self.therapist.respond(" ".join(args)))

# FIXME: Lame.  We should have an auto-registering CommandCenter.

commands = {

    "last-green-revision": LastGreenRevision,

    "restart": Restart,

    "rollout": Rollout,

    "help": Help,

    "hi": Hi,

}