Limnoria/plugins/News.py

#!/usr/bin/env python

###
# Copyright (c) 2003, Daniel DiPaolo
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"""
A module to allow each channel to have "news" which people will be notified of
when they join the channel.  News items may have expiration dates.
"""

from baseplugin import *

import sqlite

import ircdb
import utils
import privmsgs
import callbacks

def configure(onStart, afterConnect, advanced):
    # This will be called by setup.py to configure this module.  onStart and
    # afterConnect are both lists.  Append to onStart the commands you would
    # like to be run when the bot is started; append to afterConnect the
    # commands you would like to be run when the bot has finished connecting.
    from questions import expect, anything, something, yn
    onStart.append('load News')

example = utils.wrapLines("""
<Strike> !listnews
<strikebot> Strike: News for #sourcereview: (#1) Test; (#3) Expiration test
five-million-and-one; (#5) no expire
<Strike> !readnews 1
<strikebot> Strike: no expiration (Subject: "Test", added by Strike on 10:15
PM, September 03, 2003, expires at 12:00 AM, September 12, 2003)
<Strike> !addnews 5000 Another test news item: Here is the news text, much
longer than the subject should be.  The subject should be short and sweet like
a headline whereas the text can be a lot more detailed.
<strikebot> Strike: The operation succeeded.
<Strike> !listnews
<strikebot> Strike: News for #sourcereview: (#1) Test; (#3) Expiration test
five-million-and-one; (#5) no expire; (#7) Another test news item
<Strike> !readnews 7
<strikebot> Strike: Here is the news text, much longer than the subject should
be. The subject should be short and sweet like a headline whereas the text can
be a lot more detailed. (Subject: "Another test news item", added by Strike on
07:12 PM, September 12, 2003, expires at 08:36 PM, September 12, 2003)
""")

class News(callbacks.Privmsg, ChannelDBHandler):
    def __init__(self):
        ChannelDBHandler.__init__(self)
        callbacks.Privmsg.__init__(self)
        self.removeOld = False

    def makeDb(self, filename):
        if os.path.exists(filename):
            return sqlite.connect(filename)
        db = sqlite.connect(filename)
        cursor = db.cursor()
        cursor.execute("""CREATE TABLE news (
                          id INTEGER PRIMARY KEY,
                          subject TEXT,
                          item TEXT,
                          added_at TIMESTAMP,
                          expires_at TIMESTAMP,
                          added_by TEXT
                          )""")
        db.commit()
        return db

    def addnews(self, irc, msg, args, channel):
        """[<channel>] <expires> <subject>: <text>

        Adds a given news item of <text> to a channel with the given <subject>.
        If <expires> isn't 0, that news item will expire <expires> seconds from
        now.  <channel> is only necessary if the message isn't sent in the
        channel itself.
        """
        # Parse out the args
        i = None
        for i, arg in enumerate(args):
            if arg.endswith(':'):
                i += 1
                break
        if not i:
            raise callbacks.ArgumentError
        added_at = int(time.time())
        expire_interval = int(args[0])
        expires = expire_interval and (added_at + expire_interval)
        subject = ' '.join(args[1:i])
        text = ' '.join(args[i:])
        # Set the other stuff needed for the insert.
        if ircdb.users.hasUser(msg.prefix):
            name = ircdb.users.getUser(msg.prefix).name
        else:
            name = msg.nick

        db = self.getDb(channel)
        cursor = db.cursor()
        cursor.execute("INSERT INTO news VALUES (NULL, %s, %s, %s, %s, %s)",
                       subject[:-1], text, added_at, expires, name)
        db.commit()
        irc.reply(msg, conf.replySuccess)
    addnews = privmsgs.checkChannelCapability(addnews, 'news')

    def readnews(self, irc, msg, args):
        """[<channel>] <number>

        Display the text for news item with id <number> from <channel>.
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        channel = privmsgs.getChannel(msg, args)
        id = privmsgs.getArgs(args)
        db = self.getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT news.item, news.subject, news.added_at,
                          news.expires_at, news.added_by FROM news
                          WHERE news.id = %s""", id)
        if cursor.rowcount == 0:
            irc.error(msg, 'No news item matches that id.')
        else:
            item, subject, added_at, expires_at, added_by = cursor.fetchone()
            s = '%s (Subject: "%s", added by %s on %s' % \
                (item, subject, added_by,
                 time.strftime(conf.humanTimestampFormat,
                               time.localtime(int(added_at))))
            if int(expires_at) > 0:
                s += ', expires at %s)' % \
                     time.strftime(conf.humanTimestampFormat,
                                   time.localtime(int(expires_at)))
            else:
                s += ')'
            irc.reply(msg, s)

    def listnews(self, irc, msg, args):
        """[<channel>]

        Display the news items for <channel> in the format of "id) subject".
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        channel = privmsgs.getChannel(msg, args)
        db = self.getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT news.id, news.subject FROM news
                          WHERE (news.expires_at > %s)
                          OR (news.expires_at = 0)""",
                       int(time.time()))
        if cursor.rowcount == 0:
            irc.error(msg, 'No news items for channel: %s' % channel)
        else:
            items = []
            for (id, subject) in cursor.fetchall():
                items.append('(#%s) %s' % (id, subject))
            totalResults = len(items)
            if ircutils.shrinkList(items, '; ', 400):
                s = 'News for %s (%s of %s shown): %s' % \
                    (channel, len(items), totalResults, '; '.join(items))
            else:
                s = 'News for %s: %s' % (channel, '; '.join(items))
            irc.reply(msg, s)
                
        

    def removenews(self, irc, msg, args):
        """[<channel>] <number>

        Removes the news item with id <number> from <channel>.  <channel> is
        only necessary if the message isn't sent in the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        id = privmsgs.getArgs(args)
        db = self.getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT news.id FROM news WHERE news.id = %s""", id)
        if cursor.rowcount == 0:
            irc.error(msg, 'No news item matches that id.')
        else:
            cursor.execute("""DELETE FROM news WHERE news.id = %s""", id)
            db.commit()
            irc.reply(msg, conf.replySuccess)
            
    def changenews(self, irc, msg, args):
        """[<channel>] <number> <regexp>

        Changes the news item with id <number> from <channel> according to the
        regular expression <regexp>.  <regexp> should be of the form
        s/text/replacement/flags.  <channel> is only necessary if the message
        isn't sent on the channel itself.
        """
        pass

    def oldnews(self, irc, msg, args):
        """[<channel>] <number>

        Returns the old news item for <channel> with id <number>.  <channel>
        is only necessary if the message isn't sent in the channel itself.
        """
        pass


                    
Class = News

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