root / pykota / trunk / pykota / storages / pgstorage.py @ 1203

Revision 1203, 25.2 kB (checked in by jalet, 20 years ago)

Job price added to history

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1# PyKota
2# -*- coding: ISO-8859-15 -*-
3#
4# PyKota : Print Quotas for CUPS and LPRng
5#
6# (c) 2003 Jerome Alet <alet@librelogiciel.com>
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
20#
21# $Id$
22#
23# $Log$
24# Revision 1.23  2003/11/23 19:01:37  jalet
25# Job price added to history
26#
27# Revision 1.22  2003/11/21 14:28:46  jalet
28# More complete job history.
29#
30# Revision 1.21  2003/11/12 13:06:38  jalet
31# Bug fix wrt no user/group name command line argument to edpykota
32#
33# Revision 1.20  2003/10/09 21:25:26  jalet
34# Multiple printer names or wildcards can be passed on the command line
35# separated with commas.
36# Beta phase.
37#
38# Revision 1.19  2003/10/08 07:01:20  jalet
39# Job history can be disabled.
40# Some typos in README.
41# More messages in setup script.
42#
43# Revision 1.18  2003/10/07 09:07:30  jalet
44# Character encoding added to please latest version of Python
45#
46# Revision 1.17  2003/10/06 13:12:28  jalet
47# More work on caching
48#
49# Revision 1.16  2003/10/03 18:01:49  jalet
50# Nothing interesting...
51#
52# Revision 1.15  2003/10/03 12:27:03  jalet
53# Several optimizations, especially with LDAP backend
54#
55# Revision 1.14  2003/10/03 08:57:55  jalet
56# Caching mechanism now caches all that's cacheable.
57#
58# Revision 1.13  2003/10/02 20:23:18  jalet
59# Storage caching mechanism added.
60#
61# Revision 1.12  2003/08/17 14:20:25  jalet
62# Bug fix by Oleg Biteryakov
63#
64# Revision 1.11  2003/07/29 20:55:17  jalet
65# 1.14 is out !
66#
67# Revision 1.10  2003/07/16 21:53:08  jalet
68# Really big modifications wrt new configuration file's location and content.
69#
70# Revision 1.9  2003/07/14 17:20:15  jalet
71# Bug in postgresql storage when modifying the prices for a printer
72#
73# Revision 1.8  2003/07/14 14:18:17  jalet
74# Wrong documentation strings
75#
76# Revision 1.7  2003/07/09 20:17:07  jalet
77# Email field added to PostgreSQL schema
78#
79# Revision 1.6  2003/07/07 11:49:24  jalet
80# Lots of small fixes with the help of PyChecker
81#
82# Revision 1.5  2003/07/07 08:33:19  jalet
83# Bug fix due to a typo in LDAP code
84#
85# Revision 1.4  2003/06/30 13:54:21  jalet
86# Sorts by user / group name
87#
88# Revision 1.3  2003/06/25 14:10:01  jalet
89# Hey, it may work (edpykota --reset excepted) !
90#
91# Revision 1.2  2003/06/12 21:09:57  jalet
92# wrongly placed code.
93#
94# Revision 1.1  2003/06/10 16:37:54  jalet
95# Deletion of the second user which is not needed anymore.
96# Added a debug configuration field in /etc/pykota.conf
97# All queries can now be sent to the logger in debug mode, this will
98# greatly help improve performance when time for this will come.
99#
100#
101#
102#
103
104from pykota.storage import PyKotaStorageError,BaseStorage,StorageObject,StorageUser,StorageGroup,StoragePrinter,StorageLastJob,StorageUserPQuota,StorageGroupPQuota
105
106try :
107    import pg
108except ImportError :   
109    import sys
110    # TODO : to translate or not to translate ?
111    raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0]
112
113class Storage(BaseStorage) :
114    def __init__(self, pykotatool, host, dbname, user, passwd) :
115        """Opens the PostgreSQL database connection."""
116        BaseStorage.__init__(self, pykotatool)
117        try :
118            (host, port) = host.split(":")
119            port = int(port)
120        except ValueError :   
121            port = -1         # Use PostgreSQL's default tcp/ip port (5432).
122       
123        try :
124            self.database = pg.connect(host=host, port=port, dbname=dbname, user=user, passwd=passwd)
125        except pg.error, msg :
126            raise PyKotaStorageError, msg
127        else :   
128            self.closed = 0
129            self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user))
130           
131    def close(self) :   
132        """Closes the database connection."""
133        if not self.closed :
134            self.database.close()
135            self.closed = 1
136            self.tool.logdebug("Database closed.")
137       
138    def beginTransaction(self) :   
139        """Starts a transaction."""
140        self.database.query("BEGIN;")
141        self.tool.logdebug("Transaction begins...")
142       
143    def commitTransaction(self) :   
144        """Commits a transaction."""
145        self.database.query("COMMIT;")
146        self.tool.logdebug("Transaction committed.")
147       
148    def rollbackTransaction(self) :     
149        """Rollbacks a transaction."""
150        self.database.query("ROLLBACK;")
151        self.tool.logdebug("Transaction aborted.")
152       
153    def doSearch(self, query) :
154        """Does a search query."""
155        query = query.strip()   
156        if not query.endswith(';') :   
157            query += ';'
158        try :
159            self.tool.logdebug("QUERY : %s" % query)
160            result = self.database.query(query)
161        except pg.error, msg :   
162            raise PyKotaStorageError, msg
163        else :   
164            if (result is not None) and (result.ntuples() > 0) : 
165                return result.dictresult()
166           
167    def doModify(self, query) :
168        """Does a (possibly multiple) modify query."""
169        query = query.strip()   
170        if not query.endswith(';') :   
171            query += ';'
172        try :
173            self.tool.logdebug("QUERY : %s" % query)
174            result = self.database.query(query)
175        except pg.error, msg :   
176            raise PyKotaStorageError, msg
177        else :   
178            return result
179           
180    def doQuote(self, field) :
181        """Quotes a field for use as a string in SQL queries."""
182        if type(field) == type(0.0) : 
183            typ = "decimal"
184        elif type(field) == type(0) :   
185            typ = "int"
186        else :   
187            typ = "text"
188        return pg._quote(field, typ)
189       
190    def getAllUsersNames(self) :   
191        """Extracts all user names."""
192        usernames = []
193        result = self.doSearch("SELECT username FROM users;")
194        if result :
195            usernames = [record["username"] for record in result]
196        return usernames
197       
198    def getAllGroupsNames(self) :   
199        """Extracts all group names."""
200        groupnames = []
201        result = self.doSearch("SELECT groupname FROM groups;")
202        if result :
203            groupnames = [record["groupname"] for record in result]
204        return groupnames
205       
206    def getUserFromBackend(self, username) :   
207        """Extracts user information given its name."""
208        user = StorageUser(self, username)
209        result = self.doSearch("SELECT * FROM users WHERE username=%s LIMIT 1" % self.doQuote(username))
210        if result :
211            fields = result[0]
212            user.ident = fields.get("id")
213            user.LimitBy = fields.get("limitby")
214            user.AccountBalance = fields.get("balance")
215            user.LifeTimePaid = fields.get("lifetimepaid")
216            user.Email = fields.get("email")
217            user.Exists = 1
218        return user
219       
220    def getGroupFromBackend(self, groupname) :   
221        """Extracts group information given its name."""
222        group = StorageGroup(self, groupname)
223        result = self.doSearch("SELECT * FROM groups WHERE groupname=%s LIMIT 1" % self.doQuote(groupname))
224        if result :
225            fields = result[0]
226            group.ident = fields.get("id")
227            group.LimitBy = fields.get("limitby")
228            result = self.doSearch("SELECT SUM(balance) AS balance, SUM(lifetimepaid) AS lifetimepaid FROM users WHERE id IN (SELECT userid FROM groupsmembers WHERE groupid=%s)" % self.doQuote(group.ident))
229            if result :
230                fields = result[0]
231                group.AccountBalance = fields.get("balance")
232                group.LifeTimePaid = fields.get("lifetimepaid")
233            group.Exists = 1
234        return group
235       
236    def getPrinterFromBackend(self, printername) :       
237        """Extracts printer information given its name."""
238        printer = StoragePrinter(self, printername)
239        result = self.doSearch("SELECT * FROM printers WHERE printername=%s LIMIT 1" % self.doQuote(printername))
240        if result :
241            fields = result[0]
242            printer.ident = fields.get("id")
243            printer.PricePerJob = fields.get("priceperjob")
244            printer.PricePerPage = fields.get("priceperpage")
245            printer.LastJob = self.getPrinterLastJob(printer)
246            printer.Exists = 1
247        return printer   
248       
249    def getUserPQuotaFromBackend(self, user, printer) :       
250        """Extracts a user print quota."""
251        userpquota = StorageUserPQuota(self, user, printer)
252        if user.Exists :
253            result = self.doSearch("SELECT id, lifepagecounter, pagecounter, softlimit, hardlimit, datelimit FROM userpquota WHERE userid=%s AND printerid=%s" % (self.doQuote(user.ident), self.doQuote(printer.ident)))
254            if result :
255                fields = result[0]
256                userpquota.ident = fields.get("id")
257                userpquota.PageCounter = fields.get("pagecounter")
258                userpquota.LifePageCounter = fields.get("lifepagecounter")
259                userpquota.SoftLimit = fields.get("softlimit")
260                userpquota.HardLimit = fields.get("hardlimit")
261                userpquota.DateLimit = fields.get("datelimit")
262                userpquota.Exists = 1
263        return userpquota
264       
265    def getGroupPQuotaFromBackend(self, group, printer) :       
266        """Extracts a group print quota."""
267        grouppquota = StorageGroupPQuota(self, group, printer)
268        if group.Exists :
269            result = self.doSearch("SELECT id, softlimit, hardlimit, datelimit FROM grouppquota WHERE groupid=%s AND printerid=%s" % (self.doQuote(group.ident), self.doQuote(printer.ident)))
270            if result :
271                fields = result[0]
272                grouppquota.ident = fields.get("id")
273                grouppquota.SoftLimit = fields.get("softlimit")
274                grouppquota.HardLimit = fields.get("hardlimit")
275                grouppquota.DateLimit = fields.get("datelimit")
276                result = self.doSearch("SELECT SUM(lifepagecounter) AS lifepagecounter, SUM(pagecounter) AS pagecounter FROM userpquota WHERE printerid=%s AND userid IN (SELECT userid FROM groupsmembers WHERE groupid=%s)" % (self.doQuote(printer.ident), self.doQuote(group.ident)))
277                if result :
278                    fields = result[0]
279                    grouppquota.PageCounter = fields.get("pagecounter")
280                    grouppquota.LifePageCounter = fields.get("lifepagecounter")
281                grouppquota.Exists = 1
282        return grouppquota
283       
284    def getPrinterLastJobFromBackend(self, printer) :       
285        """Extracts a printer's last job information."""
286        lastjob = StorageLastJob(self, printer)
287        result = self.doSearch("SELECT jobhistory.id, jobid, userid, username, pagecounter, jobsize, jobprice, filename, title, copies, options, jobdate FROM jobhistory, users WHERE printerid=%s AND userid=users.id ORDER BY jobdate DESC LIMIT 1" % self.doQuote(printer.ident))
288        if result :
289            fields = result[0]
290            lastjob.ident = fields.get("id")
291            lastjob.JobId = fields.get("jobid")
292            lastjob.User = self.getUser(fields.get("username"))
293            lastjob.PrinterPageCounter = fields.get("pagecounter")
294            lastjob.JobSize = fields.get("jobsize")
295            lastjob.JobPrice = fields.get("jobprice")
296            lastjob.JobAction = fields.get("action")
297            lastjob.JobFileName = fields.get("filename")
298            lastjob.JobTitle = fields.get("title")
299            lastjob.JobCopies = fields.get("copies")
300            lastjob.JobOptions = fields.get("options")
301            lastjob.JobDate = fields.get("jobdate")
302            lastjob.Exists = 1
303        return lastjob
304           
305    def getGroupMembersFromBackend(self, group) :       
306        """Returns the group's members list."""
307        groupmembers = []
308        result = self.doSearch("SELECT * FROM groupsmembers JOIN users ON groupsmembers.userid=users.id WHERE groupid=%s" % self.doQuote(group.ident))
309        if result :
310            for record in result :
311                user = StorageUser(self, record.get("username"))
312                user.ident = record.get("userid")
313                user.LimitBy = record.get("limitby")
314                user.AccountBalance = record.get("balance")
315                user.LifeTimePaid = record.get("lifetimepaid")
316                user.Email = record.get("email")
317                user.Exists = 1
318                groupmembers.append(user)
319                self.cacheEntry("USERS", user.Name, user)
320        return groupmembers       
321       
322    def getUserGroupsFromBackend(self, user) :       
323        """Returns the user's groups list."""
324        groups = []
325        result = self.doSearch("SELECT groupname FROM groupsmembers JOIN groups ON groupsmembers.groupid=groups.id WHERE userid=%s" % self.doQuote(user.ident))
326        if result :
327            for record in result :
328                groups.append(self.getGroup(record.get("groupname")))
329        return groups       
330       
331    def getMatchingPrinters(self, printerpattern) :
332        """Returns the list of all printers for which name matches a certain pattern."""
333        printers = []
334        # We 'could' do a SELECT printername FROM printers WHERE printername LIKE ...
335        # but we don't because other storages semantics may be different, so every
336        # storage should use fnmatch to match patterns and be storage agnostic
337        result = self.doSearch("SELECT * FROM printers")
338        if result :
339            for record in result :
340                if self.tool.matchString(record["printername"], printerpattern.split(",")) :
341                    printer = StoragePrinter(self, record["printername"])
342                    printer.ident = record.get("id")
343                    printer.PricePerJob = record.get("priceperjob")
344                    printer.PricePerPage = record.get("priceperpage")
345                    printer.LastJob = self.getPrinterLastJob(printer)
346                    printer.Exists = 1
347                    printers.append(printer)
348                    self.cacheEntry("PRINTERS", printer.Name, printer)
349        return printers       
350       
351    def getPrinterUsersAndQuotas(self, printer, names=["*"]) :       
352        """Returns the list of users who uses a given printer, along with their quotas."""
353        usersandquotas = []
354        result = self.doSearch("SELECT users.id as uid,username,balance,lifetimepaid,limitby,email,userpquota.id,lifepagecounter,pagecounter,softlimit,hardlimit,datelimit FROM users JOIN userpquota ON users.id=userpquota.userid AND printerid=%s ORDER BY username ASC" % self.doQuote(printer.ident))
355        if result :
356            for record in result :
357                if self.tool.matchString(record.get("username"), names) :
358                    user = StorageUser(self, record.get("username"))
359                    user.ident = record.get("uid")
360                    user.LimitBy = record.get("limitby")
361                    user.AccountBalance = record.get("balance")
362                    user.LifeTimePaid = record.get("lifetimepaid")
363                    user.Email = record.get("email") 
364                    user.Exists = 1
365                    userpquota = StorageUserPQuota(self, user, printer)
366                    userpquota.ident = record.get("id")
367                    userpquota.PageCounter = record.get("pagecounter")
368                    userpquota.LifePageCounter = record.get("lifepagecounter")
369                    userpquota.SoftLimit = record.get("softlimit")
370                    userpquota.HardLimit = record.get("hardlimit")
371                    userpquota.DateLimit = record.get("datelimit")
372                    userpquota.Exists = 1
373                    usersandquotas.append((user, userpquota))
374                    self.cacheEntry("USERS", user.Name, user)
375                    self.cacheEntry("USERPQUOTAS", "%s@%s" % (user.Name, printer.Name), userpquota)
376        return usersandquotas
377               
378    def getPrinterGroupsAndQuotas(self, printer, names=["*"]) :       
379        """Returns the list of groups which uses a given printer, along with their quotas."""
380        groupsandquotas = []
381        result = self.doSearch("SELECT groupname FROM groups JOIN grouppquota ON groups.id=grouppquota.groupid AND printerid=%s ORDER BY groupname ASC" % self.doQuote(printer.ident))
382        if result :
383            for record in result :
384                if self.tool.matchString(record.get("groupname"), names) :
385                    group = self.getGroup(record.get("groupname"))
386                    grouppquota = self.getGroupPQuota(group, printer)
387                    groupsandquotas.append((group, grouppquota))
388        return groupsandquotas
389       
390    def addPrinter(self, printername) :       
391        """Adds a printer to the quota storage, returns it."""
392        self.doModify("INSERT INTO printers (printername) VALUES (%s)" % self.doQuote(printername))
393        return self.getPrinter(printername)
394       
395    def addUser(self, user) :       
396        """Adds a user to the quota storage, returns its id."""
397        self.doModify("INSERT INTO users (username, limitby, balance, lifetimepaid, email) VALUES (%s, %s, %s, %s, %s)" % (self.doQuote(user.Name), self.doQuote(user.LimitBy), self.doQuote(user.AccountBalance), self.doQuote(user.LifeTimePaid), self.doQuote(user.Email)))
398        return self.getUser(user.Name)
399       
400    def addGroup(self, group) :       
401        """Adds a group to the quota storage, returns its id."""
402        self.doModify("INSERT INTO groups (groupname, limitby) VALUES (%s, %s)" % (self.doQuote(group.Name), self.doQuote(group.LimitBy)))
403        return self.getGroup(group.Name)
404
405    def addUserToGroup(self, user, group) :   
406        """Adds an user to a group."""
407        result = self.doSearch("SELECT COUNT(*) AS mexists FROM groupsmembers WHERE groupid=%s AND userid=%s" % (self.doQuote(group.ident), self.doQuote(user.ident)))
408        try :
409            mexists = int(result[0].get("mexists"))
410        except (IndexError, TypeError) :   
411            mexists = 0
412        if not mexists :   
413            self.doModify("INSERT INTO groupsmembers (groupid, userid) VALUES (%s, %s)" % (self.doQuote(group.ident), self.doQuote(user.ident)))
414           
415    def addUserPQuota(self, user, printer) :
416        """Initializes a user print quota on a printer."""
417        self.doModify("INSERT INTO userpquota (userid, printerid) VALUES (%s, %s)" % (self.doQuote(user.ident), self.doQuote(printer.ident)))
418        return self.getUserPQuota(user, printer)
419       
420    def addGroupPQuota(self, group, printer) :
421        """Initializes a group print quota on a printer."""
422        self.doModify("INSERT INTO grouppquota (groupid, printerid) VALUES (%s, %s)" % (self.doQuote(group.ident), self.doQuote(printer.ident)))
423        return self.getGroupPQuota(group, printer)
424       
425    def writePrinterPrices(self, printer) :   
426        """Write the printer's prices back into the storage."""
427        self.doModify("UPDATE printers SET priceperpage=%s, priceperjob=%s WHERE id=%s" % (self.doQuote(printer.PricePerPage), self.doQuote(printer.PricePerJob), self.doQuote(printer.ident)))
428       
429    def writeUserLimitBy(self, user, limitby) :   
430        """Sets the user's limiting factor."""
431        self.doModify("UPDATE users SET limitby=%s WHERE id=%s" % (self.doQuote(limitby), self.doQuote(user.ident)))
432       
433    def writeGroupLimitBy(self, group, limitby) :   
434        """Sets the group's limiting factor."""
435        self.doModify("UPDATE groups SET limitby=%s WHERE id=%s" % (self.doQuote(limitby), self.doQuote(group.ident)))
436       
437    def writeUserPQuotaDateLimit(self, userpquota, datelimit) :   
438        """Sets the date limit permanently for a user print quota."""
439        self.doModify("UPDATE userpquota SET datelimit=%s WHERE id=%s" % (self.doQuote(datelimit), self.doQuote(userpquota.ident)))
440           
441    def writeGroupPQuotaDateLimit(self, grouppquota, datelimit) :   
442        """Sets the date limit permanently for a group print quota."""
443        self.doModify("UPDATE grouppquota SET datelimit=%s WHERE id=%s" % (self.doQuote(datelimit), self.doQuote(grouppquota.ident)))
444       
445    def writeUserPQuotaPagesCounters(self, userpquota, newpagecounter, newlifepagecounter) :   
446       """Sets the new page counters permanently for a user print quota."""
447       self.doModify("UPDATE userpquota SET pagecounter=%s,lifepagecounter=%s WHERE id=%s" % (self.doQuote(newpagecounter), self.doQuote(newlifepagecounter), self.doQuote(userpquota.ident)))
448       
449    def writeUserAccountBalance(self, user, newbalance, newlifetimepaid=None) :   
450       """Sets the new account balance and eventually new lifetime paid."""
451       if newlifetimepaid is not None :
452           self.doModify("UPDATE users SET balance=%s, lifetimepaid=%s WHERE id=%s" % (self.doQuote(newbalance), self.doQuote(newlifetimepaid), self.doQuote(user.ident)))
453       else :   
454           self.doModify("UPDATE users SET balance=%s WHERE id=%s" % (self.doQuote(newbalance), self.doQuote(user.ident)))
455           
456    def writeLastJobSize(self, lastjob, jobsize, jobprice) :       
457        """Sets the last job's size permanently."""
458        self.doModify("UPDATE jobhistory SET jobsize=%s, jobprice=%s WHERE id=%s" % (self.doQuote(jobsize), self.doQuote(jobprice), self.doQuote(lastjob.ident)))
459       
460    def writeJobNew(self, printer, user, jobid, pagecounter, action, jobsize=None, jobprice=None, filename=None, title=None, copies=None, options=None) :   
461        """Adds a job in a printer's history."""
462        if (not self.disablehistory) or (not printer.LastJob.Exists) :
463            if jobsize is not None :
464                self.doModify("INSERT INTO jobhistory (userid, printerid, jobid, pagecounter, action, jobsize, jobprice, filename, title, copies, options) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)" % (self.doQuote(user.ident), self.doQuote(printer.ident), self.doQuote(jobid), self.doQuote(pagecounter), self.doQuote(action), self.doQuote(jobsize), self.doQuote(jobprice), self.doQuote(filename), self.doQuote(title), self.doQuote(copies), self.doQuote(options)))
465            else :   
466                self.doModify("INSERT INTO jobhistory (userid, printerid, jobid, pagecounter, action, filename, title, copies, options) VALUES (%s, %s, %s, %s, %s)" % (self.doQuote(user.ident), self.doQuote(printer.ident), self.doQuote(jobid), self.doQuote(pagecounter), self.doQuote(action), self.doQuote(filename), self.doQuote(title), self.doQuote(copies), self.doQuote(options)))
467        else :       
468            # here we explicitly want to reset jobsize to NULL if needed
469            self.doModify("UPDATE jobhistory SET userid=%s, jobid=%s, pagecounter=%s, action=%s, jobsize=%s, jobprice=%s, filename=%s, title=%s, copies=%s, options=%s, jobdate=now() WHERE id=%s;" % (self.doQuote(user.ident), self.doQuote(jobid), self.doQuote(pagecounter), self.doQuote(action), self.doQuote(jobsize), self.doQuote(jobprice), self.doQuote(filename), self.doQuote(title), self.doQuote(copies), self.doQuote(options), self.doQuote(printer.LastJob.ident)))
470           
471    def writeUserPQuotaLimits(self, userpquota, softlimit, hardlimit) :
472        """Sets soft and hard limits for a user quota."""
473        self.doModify("UPDATE userpquota SET softlimit=%s, hardlimit=%s, datelimit=NULL WHERE id=%s" % (self.doQuote(softlimit), self.doQuote(hardlimit), self.doQuote(userpquota.ident)))
474       
475    def writeGroupPQuotaLimits(self, grouppquota, softlimit, hardlimit) :
476        """Sets soft and hard limits for a group quota on a specific printer."""
477        self.doModify("UPDATE grouppquota SET softlimit=%s, hardlimit=%s, datelimit=NULL WHERE id=%s" % (self.doQuote(softlimit), self.doQuote(hardlimit), self.doQuote(grouppquota.ident)))
478
479    def deleteUser(self, user) :   
480        """Completely deletes an user from the Quota Storage."""
481        # TODO : What should we do if we delete the last person who used a given printer ?
482        # TODO : we can't reassign the last job to the previous one, because next user would be
483        # TODO : incorrectly charged (overcharged).
484        for q in [ 
485                    "DELETE FROM groupsmembers WHERE userid=%s" % self.doQuote(user.ident),
486                    "DELETE FROM jobhistory WHERE userid=%s" % self.doQuote(user.ident),
487                    "DELETE FROM userpquota WHERE userid=%s" % self.doQuote(user.ident),
488                    "DELETE FROM users WHERE id=%s" % self.doQuote(user.ident),
489                  ] :
490            self.doModify(q)
491       
492    def deleteGroup(self, group) :   
493        """Completely deletes a group from the Quota Storage."""
494        for q in [
495                   "DELETE FROM groupsmembers WHERE groupid=%s" % self.doQuote(group.ident),
496                   "DELETE FROM grouppquota WHERE groupid=%s" % self.doQuote(group.ident),
497                   "DELETE FROM groups WHERE id=%s" % self.doQuote(group.ident),
498                 ] : 
499            self.doModify(q)
500       
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