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Limnoria/plugins/Lookup.py

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#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# 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.
###
"""
The Lookup plugin handles looking up various values by their key.
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"""
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__revision__ = "$Id$"
import plugins
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import os
import re
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import sys
import sets
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import getopt
import string
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import conf
import utils
import privmsgs
import callbacks
try:
import sqlite
except ImportError:
raise callbacks.Error, 'You need to have PySQLite installed to use this ' \
'plugin. Download it at <http://pysqlite.sf.net/>'
def configure(advanced):
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from questions import expect, anything, something, yn
conf.registerPlugin('Lookup', True)
output("""This module allows you to define commands that do a simple key
lookup and return some simple value. It has a command "add"
that takes a command name and a file from the data dir and adds a
command with that name that responds with the mapping from that
file. The file itself should be composed of lines
of the form key:value.""")
while yn('Would you like to add a file?'):
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filename = something('What\'s the filename?')
try:
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dataDir = conf.supybot.directories.data()
fd = file(os.path.join(dataDir, filename))
except EnvironmentError, e:
output('I couldn\'t open that file: %s' % e)
continue
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counter = 1
try:
for line in fd:
line = line.rstrip('\r\n')
if not line or line.startswith('#'):
continue
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(key, value) = line.split(':', 1)
counter += 1
except ValueError:
output('That\'s not a valid file; '
'line #%s is malformed.' % counter)
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continue
command = something('What would you like the command to be?')
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onStart.append('lookup add %s %s' % (command, filename))
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class LookupDB(plugins.DBHandler):
def makeDb(self, filename):
return sqlite.connect(filename)
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class Lookup(callbacks.Privmsg):
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def __init__(self):
callbacks.Privmsg.__init__(self)
self.lookupDomains = sets.Set()
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dataDir = conf.supybot.directories.data()
self.dbHandler = LookupDB(name=os.path.join(dataDir, 'Lookup'))
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def _shrink(self, s):
return utils.ellipsisify(s, 50)
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def die(self):
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self.dbHandler.die()
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def remove(self, irc, msg, args):
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"""<name>
Removes the lookup for <name>.
"""
name = privmsgs.getArgs(args)
name = callbacks.canonicalName(name)
if name not in self.lookupDomains:
irc.error('That\'s not a valid lookup to remove.')
return
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db = self.dbHandler.getDb()
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cursor = db.cursor()
try:
cursor.execute("""DROP TABLE %s""" % name)
db.commit()
delattr(self.__class__, name)
irc.replySuccess()
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except sqlite.DatabaseError:
irc.error('No such lookup exists.')
remove = privmsgs.checkCapability(remove, 'admin')
_splitRe = re.compile(r'(?<!\\):')
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def add(self, irc, msg, args):
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"""<name> <filename>
Adds a lookup for <name> with the key/value pairs specified in the
colon-delimited file specified by <filename>. <filename> is searched
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for in conf.supybot.directories.data. If <name> is not singular, we
try to make it singular before creating the command.
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"""
(name, filename) = privmsgs.getArgs(args, required=2)
name = utils.depluralize(name)
name = callbacks.canonicalName(name)
if hasattr(self, name):
s = 'I already have a command in this plugin named %s' % name
irc.error(s)
return
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db = self.dbHandler.getDb()
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cursor = db.cursor()
try:
cursor.execute("""SELECT * FROM %s LIMIT 1""" % name)
self.addCommand(name)
irc.replySuccess()
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except sqlite.DatabaseError:
# Good, there's no such database.
try:
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dataDir = conf.supybot.directories.data()
filename = os.path.join(dataDir, filename)
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fd = file(filename)
except EnvironmentError, e:
irc.error('Could not open %s: %s' % (filename, e.args[1]))
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return
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try:
cursor.execute("""SELECT COUNT(*) FROM %s""" % name)
except sqlite.DatabaseError:
cursor.execute("CREATE TABLE %s (key TEXT, value TEXT)" % name)
sql = "INSERT INTO %s VALUES (%%s, %%s)" % name
for line in utils.nonCommentNonEmptyLines(fd):
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line = line.rstrip('\r\n')
try:
(key, value) = self._splitRe.split(line, 1)
key = key.replace('\\:', ':')
except ValueError:
cursor.execute("""DROP TABLE %s""" % name)
s = 'Invalid line in %s: %r' % (filename, line)
irc.error(s)
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return
cursor.execute(sql, key, value)
cursor.execute("CREATE INDEX %s_keys ON %s (key)" %(name,name))
db.commit()
self.addCommand(name)
irc.replySuccess('(lookup %s added)' % name)
add = privmsgs.checkCapability(add, 'admin')
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def addCommand(self, name):
def f(self, irc, msg, args):
args.insert(0, name)
self._lookup(irc, msg, args)
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db = self.dbHandler.getDb()
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cursor = db.cursor()
cursor.execute("""SELECT COUNT(*) FROM %s""" % name)
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rows = int(cursor.fetchone()[0])
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docstring = """[<key>]
If <key> is given, looks up <key> in the %s database. Otherwise,
returns a random key: value pair from the database. There are
%s in the database.
""" % (name, utils.nItems(name, rows))
f = utils.changeFunctionName(f, name, docstring)
self.lookupDomains.add(name)
setattr(self.__class__, name, f)
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_sqlTrans = string.maketrans('*?', '%_')
def search(self, irc, msg, args):
"""[--{regexp}=<value>] [--values] <name> <glob>
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Searches the domain <name> for lookups matching <glob>. If --regexp
is given, its associated value is taken as a regexp and matched
against the lookups. If --values is given, search the values rather
than the keys.
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"""
column = 'key'
while '--values' in args:
column = 'value'
args.remove('--values')
(options, rest) = getopt.getopt(args, '', ['regexp='])
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(name, globs) = privmsgs.getArgs(rest, optional=1)
db = self.dbHandler.getDb()
criteria = []
formats = []
predicateName = 'p'
for (option, arg) in options:
if option == '--regexp':
criteria.append('%s(%s)' % (predicateName, column))
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try:
r = utils.perlReToPythonRe(arg)
except ValueError, e:
irc.error('%r is not a valid regular expression' %
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arg)
return
def p(s, r=r):
return int(bool(r.search(s)))
db.create_function(predicateName, 1, p)
predicateName += 'p'
for glob in globs.split():
if '?' not in glob and '*' not in glob:
glob = '*%s*' % glob
criteria.append('%s LIKE %%s' % column)
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formats.append(glob.translate(self._sqlTrans))
if not criteria:
raise callbacks.ArgumentError
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#print 'criteria: %s' % repr(criteria)
#print 'formats: %s' % repr(formats)
cursor = db.cursor()
sql = """SELECT key, value FROM %s WHERE %s""" % \
(name, ' AND '.join(criteria))
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#print 'sql: %s' % sql
cursor.execute(sql, formats)
if cursor.rowcount == 0:
irc.reply('No %s matched that query.' % utils.pluralize(name))
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else:
lookups = ['%s: %s' % (item[0], self._shrink(item[1]))
for item in cursor.fetchall()]
irc.reply(utils.commaAndify(lookups))
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def _lookup(self, irc, msg, args):
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"""<name> <key>
Looks up the value of <key> in the domain <name>.
"""
(name, key) = privmsgs.getArgs(args, optional=1)
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db = self.dbHandler.getDb()
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cursor = db.cursor()
if key:
sql = """SELECT value FROM %s WHERE key LIKE %%s""" % name
try:
cursor.execute(sql, key)
except sqlite.DatabaseError, e:
if 'no such table' in str(e):
irc.error('I don\'t have a domain %s' % name)
else:
irc.error(str(e))
return
if cursor.rowcount == 0:
irc.error('I couldn\'t find %s in %s' % (key, name))
elif cursor.rowcount == 1:
irc.reply(cursor.fetchone()[0])
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else:
values = [t[0] for t in cursor.fetchall()]
irc.reply('%s could be %s' % (key, ', or '.join(values)))
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else:
sql = """SELECT key, value FROM %s
ORDER BY random() LIMIT 1""" % name
try:
cursor.execute(sql)
except sqlite.DatabaseError, e:
if 'no such table' in str(e):
irc.error('I don\'t have a domain %r' % name)
else:
irc.error(str(e))
return
(key, value) = cursor.fetchone()
irc.reply('%s: %s' % (key, value))
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Class = Lookup
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# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: