tig-pyconsole.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# $URL$
# $Id$

"""Tiny Python Console for TwitterIrcGateway.

This script require IronPython 2.0 bundled or CPython 2.5 (not 2.6) bundled
  pure python part of python standard library:
    codeop, traceback, __future__, os, os.path (and ntpath), linecache,
    stat, errno, copy_reg, types, UserDict
"""

__docformat__ = 'reStructuredText'
__author__ = 'Topia <[email protected]>'
__version__ = '$Revision$'
__date__ = '$Date$'
__credits__ = """copyright (C) 2009 Topia <[email protected]>. all rights reserved."""

import sys
import clr
from Misuzilla.Net.Irc import *

sys.path.append(r"Libraries\IronPython")
from codeop import CommandCompiler
import traceback

## TODO:
##  * better multiline handling

class IRCWriter(object):
    def __init__(self, session, prefix, target, notice=True):
        self.session = session
        self.prefix = prefix
        if notice:
            self.msgclass = NoticeMessage
        else:
            self.msgclass = PrivMsgMessage
        self.target = target
        self.buffer = ''

    def write(self, text):
        buf = self.buffer + text
        try:
            while True:
                if "\n" not in buf:
                    break
                line, buf = buf.split("\n", 1)
                ircmsg = self.msgclass(self.target, line.rstrip())
                ircmsg.Sender = self.prefix
                self.session.Send(ircmsg)
        finally:
            self.buffer = buf

    def flush(self):
        if self.buffer:
            self.write("\n")


class ConsoleHandler(object):
    channel_name = '#pyconsole'

    def __init__(self, locals=None):
        self.compile = CommandCompiler()
        self.resetbuffer()
        if locals is None:
            locals = {"__name__": "__console__", "__doc__": None,
                      "console": self}
        self.locals = locals

    def attach(self, session=Session, server=Server):
        self.server = server
        self.session = session
        self.session.PreMessageReceived += self.onPreMessageReceived
        self.session.PostMessageReceived += self.onPostMessageReceived
        chname = self.channel_name
        self.userhost = 'twitter@' + server.ServerName
        self.stdout = IRCWriter(session, 'stdout!' + self.userhost, chname)
        self.stderr = IRCWriter(session, 'stderr!' + self.userhost, chname)

    def detach(self):
        self.session.PreMessageReceived -= self.onPreMessageReceived
        self.session.PostMessageReceived -= self.onPostMessageReceived
        self.session = self.server = None
        self.stdout = self.stderr = None

    def send_notify(self, nick, msg):
        ircmsg = NoticeMessage(self.channel_name, msg)
        ircmsg.SenderHost = self.userhost
        ircmsg.SenderNick = nick
        self.session.Send(ircmsg)

    def onPreMessageReceived(self, sender, eventargs):
        msg = eventargs.Message
        if (not isinstance(msg, (PrivMsgMessage, NoticeMessage)) or
            msg.Receiver != self.channel_name):
            return
        eventargs.Cancel = True;
        self.process_line(msg.Content)

    def onPostMessageReceived(self, sender, eventargs):
        msg = eventargs.Message
        if (not isinstance(msg, JoinMessage) or
            msg.Channel != self.channel_name):
            return
        Session.Groups[self.channel_name].IsSpecial = True;

    def resetbuffer(self):
        self.buffer = []
        self.inmultiline = False

    def process_line(self, content):
        if not content.strip():
            content = ''
        more = self.push(content)
        if more and not self.inmultiline:
            self.send_notify('...', 'when insert blank (normally last) line, enter space only line')
            self.inmultiline = True

    def push(self, content):
        self.buffer.append(content)
        source = "\n".join(self.buffer)
        more = self.runsource(source)
        if not more:
            self.resetbuffer()
        return more

    def runsource(self, source):
        if source[:1] in [' ', '\t']:
            source = 'if 1:\n%s' % source

        try:
            code = self.compile(source)
        except (OverflowError, SyntaxError, ValueError, TypeError):
            self.send_notify('failure-source', repr(source))
            for line in traceback.format_exc().splitlines():
                self.send_notify('failure', line)
            return None

        if code is None:
            return True

        self.runcode(code)
        return False

    def runcode(self, code):
        __builtins__['_'] = None
        iobackup = sys.stdin, sys.stdout, sys.stderr
        try:
            sys.stdin = None
            sys.stdout = self.stdout
            sys.stderr = self.stderr
            try:
                try:
                    exec code in self.locals
                finally:
                    if sys.stdout:
                        sys.stdout.flush()
                    if sys.stderr:
                        sys.stderr.flush()
            except Exception, e:
                for line in traceback.format_exc().splitlines():
                    self.send_notify('failure', line)
            else:
                if _ is None and self.inmultiline:
                    self.send_notify('success', '(accepted)')
        finally:
            sys.stdin, sys.stdout, sys.stderr = iobackup


console_locals = {"__name__": "__console__", "__doc__": None}
console = ConsoleHandler(console_locals)
console_locals['console'] = console
console_locals['Session'] = Session
console_locals['Server'] = Server
console_locals.update(sys.modules)
console.attach(Session, Server)