Limnoria/plugins/Notes.py

#!/usr/bin/env python

###
# Copyright (c) 2003, Brett Kelly
# 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.
###

"""
A complete messaging system that allows users to leave 'notes' for other
users that can be retrieved later.
"""

from baseplugin import *

import time
import os.path
import operator

import sqlite

import conf
import debug
import utils
import ircdb
import ircmsgs
import privmsgs
import callbacks
import ircutils

dbfilename = os.path.join(conf.dataDir, 'Notes.db')

class Notes(callbacks.Privmsg):
    def __init__(self):
        callbacks.Privmsg.__init__(self)
        self.makeDB(dbfilename)

    def makeDB(self, filename):
        "create Notes database and tables"
        if os.path.exists(filename):
            self.db = sqlite.connect(filename)
            self.cursor = self.db.cursor()
            return
        self.db = sqlite.connect(filename, converters={'bool': bool})
        self.cursor = self.db.cursor()
        self.cursor.execute("""CREATE TABLE users (
                               id INTEGER PRIMARY KEY,
                               name TEXT UNIQUE ON CONFLICT IGNORE
                               )""")
        self.cursor.execute("""CREATE TABLE notes (
                               id INTEGER PRIMARY KEY,
                               from_id INTEGER,
                               to_id INTEGER,
                               added_at TIMESTAMP,
                               notified BOOLEAN,
                               read BOOLEAN,
                               public BOOLEAN,
                               note TEXT
                               )""")
        self.db.commit()
   
    def _addUser(self, username):
        "Not callable from channel, used to add users to database."
        self.cursor.execute('INSERT INTO users VALUES (NULL, %s)', username)
        self.db.commit()
        
    def getUserId(self, username):
        "Returns the user id matching the given username from the users table."
        self.cursor.execute('SELECT id FROM users where name=%s', username)
        if self.cursor.rowcount != 0:
            return self.cursor.fetchone()[0]
        else: 
            raise KeyError, username

    def getUserName(self, userid):
        "Returns the username matching the given user id from the users table."
        self.cursor.execute('SELECT name FROM users WHERE id=%s', userid)
        if self.cursor.rowcount != 0:
            return self.cursor.fetchone()[0]
        else:
            raise KeyError, userid

    def setAsRead(self, noteid):
        "Changes a message's 'read' value to true in the notes table."
        self.cursor.execute("""UPDATE notes
                               SET read=1, notified=1
                               WHERE id=%s""", noteid)
        self.db.commit()

    def die(self):
        "Called when module is unloaded/reloaded."
        self.db.close()
    
    def doJoin(self, irc, msg):
        try:
            name = ircdb.users.getUserName(msg.prefix)
        except KeyError:
            return
        cursor = self.db.cursor()
        cursor.execute("""SELECT COUNT(*) FROM notes, users
                          WHERE users.name=%s AND
                                notes.to_id=users.id AND
                                notified=0""", name)
        unnotified = int(cursor.fetchone()[0])
        if unnotified == 0:
            return
        cursor.execute("""SELECT COUNT(*) FROM notes, users
                          WHERE users.name=%s AND
                                notes.to_id=users.id AND
                                read=0""", name)
        unread = int(cursor.fetchone()[0])
        s = 'You have %s unread note%s ' \
            '%s that I haven\'t told you about before now..' % \
            (unread, unread == 1 and ';' or 's;', unnotified)
        irc.queueMsg(ircmsgs.privmsg(msg.nick, s))
        cursor.execute("""UPDATE notes
                          SET notified=1
                          WHERE notes.to_id=(SELECT id
                                             FROM users
                                             WHERE name=%s)""", name)

    def sendnote(self, irc, msg, args):
        """<recipient> <text>
        
        Sends a new note to the user specified.
        """
        (name, note) = privmsgs.getArgs(args, needed=2)
        sender = msg.nick
        if ircdb.users.hasUser(name):
            recipient = name
        else:
            n = irc.state.nickToHostmask(name)
            recipient = ircdb.users.getUserName(n)
        self._addUser(sender)
        self._addUser(recipient)
        senderId = self.getUserId(sender)
        recipId = self.getUserId(recipient)
        if ircutils.isChannel(msg.args[0]): 
            public = 1
        else: 
            public = 0 
        self.cursor.execute("""INSERT INTO notes VALUES 
                               (NULL, %s, %s, %s, 0, 0, %s, %s)""", 
                               senderId, recipId, int(time.time()),
                               public, note)
        self.db.commit()
        irc.reply(msg, conf.replySuccess)

    def note(self, irc, msg, args):
        """<note id>
        
        Retrieves a single note by unique note id.
        """
        noteid = privmsgs.getArgs(args)
        try:
            sender = ircdb.users.getUserName(msg.prefix)
            senderId = self.getUserId(sender)
        except KeyError:
            irc.error(msg, conf.replyNoUser)
            return
        self.cursor.execute("""SELECT notes.note, notes.to_id, notes.from_id,
                                      notes.added_at, notes.public 
                               FROM users, notes
                               WHERE users.name=%s AND
                                     notes.to_id=users.id AND
                                     notes.id=%s
                               LIMIT 1""", sender, noteid)
        if self.cursor.rowcount == 0:
            irc.error(msg, 'That\'s not a valid note id.')
            return
        note, to_id, from_id, added_at, public = self.cursor.fetchone()
        author = self.getUserName(from_id)
        if senderId != to_id:
            irc.error(msg, 'You are not the recipient of note %s.' % noteid)
            return
        public = int(public)
        elapsed = utils.timeElapsed(time.time() - int(added_at))
        newnote = "%s (Sent by %s %s ago)" % (note, author, elapsed)
        if public:
            irc.reply(msg, newnote)
        else:
            irc.queueMsg(ircmsgs.privmsg(msg.nick, newnote))
        self.setAsRead(noteid)

    def notes(self, irc, msg, args):
        """takes no arguments
        
        Retrieves all your unread notes.
        """
        try:
            sender = ircdb.users.getUserName(msg.prefix)
        except KeyError:
            irc.error(msg, conf.replyNoUser)
            return
        self.cursor.execute("""SELECT notes.id, notes.from_id,
                                      notes.public, notes.read
                               FROM users, notes
                               WHERE users.name=%s AND
                                     notes.to_id=users.id AND
                                     notes.read=0""", sender)
        count = self.cursor.rowcount
        notes = self.cursor.fetchall()
        L = []
        more = False
        if count == 0:
            irc.reply(msg, 'You have no unread notes.')
        else:
            for (id, from_id, public, read) in notes:
                if not int(read):
                    sender = self.getUserName(from_id)
                    if int(public):
                        L.append(r'#%s from %s' % (id, sender))
                    else:
                        L.append(r'#%s (private)' % id)
            if more:
                ircutils.shrinkList(L, ', ', 400)
                L.append('and even more notes.')
            else:
                ircutils.shrinkList(L, ', ', 450)
            irc.reply(msg, ', '.join(L))

    def oldnotes(self, irc, msg, args):
        """takes no arguments

        Returns a list of your most recent old notes.
        """
        try:
            sender = ircdb.users.getUserName(msg.prefix)
        except KeyError:
            irc.error(msg, conf.replyNoUser)
            return
        cursor = self.db.cursor()
        cursor.execute("""SELECT notes.id FROM users, notes
                          WHERE notes.to_id=users.id AND
                                users.name=%s AND
                                notes.read=1""", sender)
        if cursor.rowcount == 0:
            irc.reply(msg, 'I could find no notes for your user.')
        else:
            ids = [str(t[0]) for t in cursor.fetchall()]
            ids.reverse()
            ircutils.shrinkList(ids, ', ', 425)
            ids.reverse()
            irc.reply(msg, ', '.join(ids))
                          


Class = Notes

# vim: shiftwidth=4 tabstop=8 expandtab textwidth=78: