root / pykota / trunk / pykota / storages / pgstorage.py @ 1240

Revision 1240, 26.0 kB (checked in by uid67467, 20 years ago)

Should be ok now.

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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 1.25  2003/12/27 16:49:25  uid67467
25# Should be ok now.
26#
27# Revision 1.24  2003/11/29 22:02:14  jalet
28# Don't try to retrieve the user print quota information if current printer
29# doesn't exist.
30#
31# Revision 1.23  2003/11/23 19:01:37  jalet
32# Job price added to history
33#
34# Revision 1.22  2003/11/21 14:28:46  jalet
35# More complete job history.
36#
37# Revision 1.21  2003/11/12 13:06:38  jalet
38# Bug fix wrt no user/group name command line argument to edpykota
39#
40# Revision 1.20  2003/10/09 21:25:26  jalet
41# Multiple printer names or wildcards can be passed on the command line
42# separated with commas.
43# Beta phase.
44#
45# Revision 1.19  2003/10/08 07:01:20  jalet
46# Job history can be disabled.
47# Some typos in README.
48# More messages in setup script.
49#
50# Revision 1.18  2003/10/07 09:07:30  jalet
51# Character encoding added to please latest version of Python
52#
53# Revision 1.17  2003/10/06 13:12:28  jalet
54# More work on caching
55#
56# Revision 1.16  2003/10/03 18:01:49  jalet
57# Nothing interesting...
58#
59# Revision 1.15  2003/10/03 12:27:03  jalet
60# Several optimizations, especially with LDAP backend
61#
62# Revision 1.14  2003/10/03 08:57:55  jalet
63# Caching mechanism now caches all that's cacheable.
64#
65# Revision 1.13  2003/10/02 20:23:18  jalet
66# Storage caching mechanism added.
67#
68# Revision 1.12  2003/08/17 14:20:25  jalet
69# Bug fix by Oleg Biteryakov
70#
71# Revision 1.11  2003/07/29 20:55:17  jalet
72# 1.14 is out !
73#
74# Revision 1.10  2003/07/16 21:53:08  jalet
75# Really big modifications wrt new configuration file's location and content.
76#
77# Revision 1.9  2003/07/14 17:20:15  jalet
78# Bug in postgresql storage when modifying the prices for a printer
79#
80# Revision 1.8  2003/07/14 14:18:17  jalet
81# Wrong documentation strings
82#
83# Revision 1.7  2003/07/09 20:17:07  jalet
84# Email field added to PostgreSQL schema
85#
86# Revision 1.6  2003/07/07 11:49:24  jalet
87# Lots of small fixes with the help of PyChecker
88#
89# Revision 1.5  2003/07/07 08:33:19  jalet
90# Bug fix due to a typo in LDAP code
91#
92# Revision 1.4  2003/06/30 13:54:21  jalet
93# Sorts by user / group name
94#
95# Revision 1.3  2003/06/25 14:10:01  jalet
96# Hey, it may work (edpykota --reset excepted) !
97#
98# Revision 1.2  2003/06/12 21:09:57  jalet
99# wrongly placed code.
100#
101# Revision 1.1  2003/06/10 16:37:54  jalet
102# Deletion of the second user which is not needed anymore.
103# Added a debug configuration field in /etc/pykota.conf
104# All queries can now be sent to the logger in debug mode, this will
105# greatly help improve performance when time for this will come.
106#
107#
108#
109#
110
111from pykota.storage import PyKotaStorageError,BaseStorage,StorageObject,StorageUser,StorageGroup,StoragePrinter,StorageLastJob,StorageUserPQuota,StorageGroupPQuota
112
113try :
114    import pg
115except ImportError :   
116    import sys
117    # TODO : to translate or not to translate ?
118    raise PyKotaStorageError, "This python version (%s) doesn't seem to have the PygreSQL module installed correctly." % sys.version.split()[0]
119
120class Storage(BaseStorage) :
121    def __init__(self, pykotatool, host, dbname, user, passwd) :
122        """Opens the PostgreSQL database connection."""
123        BaseStorage.__init__(self, pykotatool)
124        try :
125            (host, port) = host.split(":")
126            port = int(port)
127        except ValueError :   
128            port = -1         # Use PostgreSQL's default tcp/ip port (5432).
129       
130        try :
131            self.database = pg.connect(host=host, port=port, dbname=dbname, user=user, passwd=passwd)
132        except pg.error, msg :
133            raise PyKotaStorageError, msg
134        else :   
135            self.closed = 0
136            self.tool.logdebug("Database opened (host=%s, port=%s, dbname=%s, user=%s)" % (host, port, dbname, user))
137           
138    def close(self) :   
139        """Closes the database connection."""
140        if not self.closed :
141            self.database.close()
142            self.closed = 1
143            self.tool.logdebug("Database closed.")
144       
145    def beginTransaction(self) :   
146        """Starts a transaction."""
147        self.database.query("BEGIN;")
148        self.tool.logdebug("Transaction begins...")
149       
150    def commitTransaction(self) :   
151        """Commits a transaction."""
152        self.database.query("COMMIT;")
153        self.tool.logdebug("Transaction committed.")
154       
155    def rollbackTransaction(self) :     
156        """Rollbacks a transaction."""
157        self.database.query("ROLLBACK;")
158        self.tool.logdebug("Transaction aborted.")
159       
160    def doSearch(self, query) :
161        """Does a search query."""
162        query = query.strip()   
163        if not query.endswith(';') :   
164            query += ';'
165        try :
166            self.tool.logdebug("QUERY : %s" % query)
167            result = self.database.query(query)
168        except pg.error, msg :   
169            raise PyKotaStorageError, msg
170        else :   
171            if (result is not None) and (result.ntuples() > 0) : 
172                return result.dictresult()
173           
174    def doModify(self, query) :
175        """Does a (possibly multiple) modify query."""
176        query = query.strip()   
177        if not query.endswith(';') :   
178            query += ';'
179        try :
180            self.tool.logdebug("QUERY : %s" % query)
181            result = self.database.query(query)
182        except pg.error, msg :   
183            raise PyKotaStorageError, msg
184        else :   
185            return result
186           
187    def doQuote(self, field) :
188        """Quotes a field for use as a string in SQL queries."""
189        if type(field) == type(0.0) : 
190            typ = "decimal"
191        elif type(field) == type(0) :   
192            typ = "int"
193        else :   
194            typ = "text"
195        return pg._quote(field, typ)
196       
197    def getAllUsersNames(self) :   
198        """Extracts all user names."""
199        usernames = []
200        result = self.doSearch("SELECT username FROM users;")
201        if result :
202            usernames = [record["username"] for record in result]
203        return usernames
204       
205    def getAllGroupsNames(self) :   
206        """Extracts all group names."""
207        groupnames = []
208        result = self.doSearch("SELECT groupname FROM groups;")
209        if result :
210            groupnames = [record["groupname"] for record in result]
211        return groupnames
212       
213    def getUserFromBackend(self, username) :   
214        """Extracts user information given its name."""
215        user = StorageUser(self, username)
216        result = self.doSearch("SELECT * FROM users WHERE username=%s LIMIT 1" % self.doQuote(username))
217        if result :
218            fields = result[0]
219            user.ident = fields.get("id")
220            user.LimitBy = fields.get("limitby")
221            user.AccountBalance = fields.get("balance")
222            user.LifeTimePaid = fields.get("lifetimepaid")
223            user.Email = fields.get("email")
224            user.Exists = 1
225        return user
226       
227    def getGroupFromBackend(self, groupname) :   
228        """Extracts group information given its name."""
229        group = StorageGroup(self, groupname)
230        result = self.doSearch("SELECT * FROM groups WHERE groupname=%s LIMIT 1" % self.doQuote(groupname))
231        if result :
232            fields = result[0]
233            group.ident = fields.get("id")
234            group.LimitBy = fields.get("limitby")
235            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))
236            if result :
237                fields = result[0]
238                group.AccountBalance = fields.get("balance")
239                group.LifeTimePaid = fields.get("lifetimepaid")
240            group.Exists = 1
241        return group
242       
243    def getPrinterFromBackend(self, printername) :       
244        """Extracts printer information given its name."""
245        printer = StoragePrinter(self, printername)
246        result = self.doSearch("SELECT * FROM printers WHERE printername=%s LIMIT 1" % self.doQuote(printername))
247        if result :
248            fields = result[0]
249            printer.ident = fields.get("id")
250            printer.PricePerJob = fields.get("priceperjob")
251            printer.PricePerPage = fields.get("priceperpage")
252            printer.LastJob = self.getPrinterLastJob(printer)
253            printer.Exists = 1
254        return printer   
255       
256    def getUserPQuotaFromBackend(self, user, printer) :       
257        """Extracts a user print quota."""
258        userpquota = StorageUserPQuota(self, user, printer)
259        if printer.Exists and user.Exists :
260            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)))
261            if result :
262                fields = result[0]
263                userpquota.ident = fields.get("id")
264                userpquota.PageCounter = fields.get("pagecounter")
265                userpquota.LifePageCounter = fields.get("lifepagecounter")
266                userpquota.SoftLimit = fields.get("softlimit")
267                userpquota.HardLimit = fields.get("hardlimit")
268                userpquota.DateLimit = fields.get("datelimit")
269                userpquota.Exists = 1
270        return userpquota
271       
272    def getGroupPQuotaFromBackend(self, group, printer) :       
273        """Extracts a group print quota."""
274        grouppquota = StorageGroupPQuota(self, group, printer)
275        if group.Exists :
276            result = self.doSearch("SELECT id, softlimit, hardlimit, datelimit FROM grouppquota WHERE groupid=%s AND printerid=%s" % (self.doQuote(group.ident), self.doQuote(printer.ident)))
277            if result :
278                fields = result[0]
279                grouppquota.ident = fields.get("id")
280                grouppquota.SoftLimit = fields.get("softlimit")
281                grouppquota.HardLimit = fields.get("hardlimit")
282                grouppquota.DateLimit = fields.get("datelimit")
283                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)))
284                if result :
285                    fields = result[0]
286                    grouppquota.PageCounter = fields.get("pagecounter")
287                    grouppquota.LifePageCounter = fields.get("lifepagecounter")
288                grouppquota.Exists = 1
289        return grouppquota
290       
291    def getPrinterLastJobFromBackend(self, printer) :       
292        """Extracts a printer's last job information."""
293        lastjob = StorageLastJob(self, printer)
294        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))
295        if result :
296            fields = result[0]
297            lastjob.ident = fields.get("id")
298            lastjob.JobId = fields.get("jobid")
299            lastjob.User = self.getUser(fields.get("username"))
300            lastjob.PrinterPageCounter = fields.get("pagecounter")
301            lastjob.JobSize = fields.get("jobsize")
302            lastjob.JobPrice = fields.get("jobprice")
303            lastjob.JobAction = fields.get("action")
304            lastjob.JobFileName = fields.get("filename")
305            lastjob.JobTitle = fields.get("title")
306            lastjob.JobCopies = fields.get("copies")
307            lastjob.JobOptions = fields.get("options")
308            lastjob.JobDate = fields.get("jobdate")
309            lastjob.Exists = 1
310        return lastjob
311           
312    def getGroupMembersFromBackend(self, group) :       
313        """Returns the group's members list."""
314        groupmembers = []
315        result = self.doSearch("SELECT * FROM groupsmembers JOIN users ON groupsmembers.userid=users.id WHERE groupid=%s" % self.doQuote(group.ident))
316        if result :
317            for record in result :
318                user = StorageUser(self, record.get("username"))
319                user.ident = record.get("userid")
320                user.LimitBy = record.get("limitby")
321                user.AccountBalance = record.get("balance")
322                user.LifeTimePaid = record.get("lifetimepaid")
323                user.Email = record.get("email")
324                user.Exists = 1
325                groupmembers.append(user)
326                self.cacheEntry("USERS", user.Name, user)
327        return groupmembers       
328       
329    def getUserGroupsFromBackend(self, user) :       
330        """Returns the user's groups list."""
331        groups = []
332        result = self.doSearch("SELECT groupname FROM groupsmembers JOIN groups ON groupsmembers.groupid=groups.id WHERE userid=%s" % self.doQuote(user.ident))
333        if result :
334            for record in result :
335                groups.append(self.getGroup(record.get("groupname")))
336        return groups       
337       
338    def getMatchingPrinters(self, printerpattern) :
339        """Returns the list of all printers for which name matches a certain pattern."""
340        printers = []
341        # We 'could' do a SELECT printername FROM printers WHERE printername LIKE ...
342        # but we don't because other storages semantics may be different, so every
343        # storage should use fnmatch to match patterns and be storage agnostic
344        result = self.doSearch("SELECT * FROM printers")
345        if result :
346            for record in result :
347                if self.tool.matchString(record["printername"], printerpattern.split(",")) :
348                    printer = StoragePrinter(self, record["printername"])
349                    printer.ident = record.get("id")
350                    printer.PricePerJob = record.get("priceperjob")
351                    printer.PricePerPage = record.get("priceperpage")
352                    printer.LastJob = self.getPrinterLastJob(printer)
353                    printer.Exists = 1
354                    printers.append(printer)
355                    self.cacheEntry("PRINTERS", printer.Name, printer)
356        return printers       
357       
358    def getPrinterUsersAndQuotas(self, printer, names=["*"]) :       
359        """Returns the list of users who uses a given printer, along with their quotas."""
360        usersandquotas = []
361        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))
362        if result :
363            for record in result :
364                if self.tool.matchString(record.get("username"), names) :
365                    user = StorageUser(self, record.get("username"))
366                    user.ident = record.get("uid")
367                    user.LimitBy = record.get("limitby")
368                    user.AccountBalance = record.get("balance")
369                    user.LifeTimePaid = record.get("lifetimepaid")
370                    user.Email = record.get("email") 
371                    user.Exists = 1
372                    userpquota = StorageUserPQuota(self, user, printer)
373                    userpquota.ident = record.get("id")
374                    userpquota.PageCounter = record.get("pagecounter")
375                    userpquota.LifePageCounter = record.get("lifepagecounter")
376                    userpquota.SoftLimit = record.get("softlimit")
377                    userpquota.HardLimit = record.get("hardlimit")
378                    userpquota.DateLimit = record.get("datelimit")
379                    userpquota.Exists = 1
380                    usersandquotas.append((user, userpquota))
381                    self.cacheEntry("USERS", user.Name, user)
382                    self.cacheEntry("USERPQUOTAS", "%s@%s" % (user.Name, printer.Name), userpquota)
383        return usersandquotas
384               
385    def getPrinterGroupsAndQuotas(self, printer, names=["*"]) :       
386        """Returns the list of groups which uses a given printer, along with their quotas."""
387        groupsandquotas = []
388        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))
389        if result :
390            for record in result :
391                if self.tool.matchString(record.get("groupname"), names) :
392                    group = self.getGroup(record.get("groupname"))
393                    grouppquota = self.getGroupPQuota(group, printer)
394                    groupsandquotas.append((group, grouppquota))
395        return groupsandquotas
396       
397    def getParentPrinters(self, printer) :   
398        """Get all the printer groups this printer is a member of."""
399        pgroups = []
400        result = self.doSearch("SELECT printername FROM printergroupsmembers JOIN printers ON groupid=id WHERE printerid=%s;" % self.doQuote(printer.ident))
401        if result :
402            for record in result :
403                parentprinter = self.getPrinter(record.get("printername"))
404                if parentprinter.Exists :
405                    pgroups.append(parentprinter)
406        return pgroups
407       
408    def addPrinter(self, printername) :       
409        """Adds a printer to the quota storage, returns it."""
410        self.doModify("INSERT INTO printers (printername) VALUES (%s)" % self.doQuote(printername))
411        return self.getPrinter(printername)
412       
413    def addUser(self, user) :       
414        """Adds a user to the quota storage, returns its id."""
415        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)))
416        return self.getUser(user.Name)
417       
418    def addGroup(self, group) :       
419        """Adds a group to the quota storage, returns its id."""
420        self.doModify("INSERT INTO groups (groupname, limitby) VALUES (%s, %s)" % (self.doQuote(group.Name), self.doQuote(group.LimitBy)))
421        return self.getGroup(group.Name)
422
423    def addUserToGroup(self, user, group) :   
424        """Adds an user to a group."""
425        result = self.doSearch("SELECT COUNT(*) AS mexists FROM groupsmembers WHERE groupid=%s AND userid=%s" % (self.doQuote(group.ident), self.doQuote(user.ident)))
426        try :
427            mexists = int(result[0].get("mexists"))
428        except (IndexError, TypeError) :   
429            mexists = 0
430        if not mexists :   
431            self.doModify("INSERT INTO groupsmembers (groupid, userid) VALUES (%s, %s)" % (self.doQuote(group.ident), self.doQuote(user.ident)))
432           
433    def addUserPQuota(self, user, printer) :
434        """Initializes a user print quota on a printer."""
435        self.doModify("INSERT INTO userpquota (userid, printerid) VALUES (%s, %s)" % (self.doQuote(user.ident), self.doQuote(printer.ident)))
436        return self.getUserPQuota(user, printer)
437       
438    def addGroupPQuota(self, group, printer) :
439        """Initializes a group print quota on a printer."""
440        self.doModify("INSERT INTO grouppquota (groupid, printerid) VALUES (%s, %s)" % (self.doQuote(group.ident), self.doQuote(printer.ident)))
441        return self.getGroupPQuota(group, printer)
442       
443    def writePrinterPrices(self, printer) :   
444        """Write the printer's prices back into the storage."""
445        self.doModify("UPDATE printers SET priceperpage=%s, priceperjob=%s WHERE id=%s" % (self.doQuote(printer.PricePerPage), self.doQuote(printer.PricePerJob), self.doQuote(printer.ident)))
446       
447    def writeUserLimitBy(self, user, limitby) :   
448        """Sets the user's limiting factor."""
449        self.doModify("UPDATE users SET limitby=%s WHERE id=%s" % (self.doQuote(limitby), self.doQuote(user.ident)))
450       
451    def writeGroupLimitBy(self, group, limitby) :   
452        """Sets the group's limiting factor."""
453        self.doModify("UPDATE groups SET limitby=%s WHERE id=%s" % (self.doQuote(limitby), self.doQuote(group.ident)))
454       
455    def writeUserPQuotaDateLimit(self, userpquota, datelimit) :   
456        """Sets the date limit permanently for a user print quota."""
457        self.doModify("UPDATE userpquota SET datelimit=%s WHERE id=%s" % (self.doQuote(datelimit), self.doQuote(userpquota.ident)))
458           
459    def writeGroupPQuotaDateLimit(self, grouppquota, datelimit) :   
460        """Sets the date limit permanently for a group print quota."""
461        self.doModify("UPDATE grouppquota SET datelimit=%s WHERE id=%s" % (self.doQuote(datelimit), self.doQuote(grouppquota.ident)))
462       
463    def writeUserPQuotaPagesCounters(self, userpquota, newpagecounter, newlifepagecounter) :   
464       """Sets the new page counters permanently for a user print quota."""
465       self.doModify("UPDATE userpquota SET pagecounter=%s,lifepagecounter=%s WHERE id=%s" % (self.doQuote(newpagecounter), self.doQuote(newlifepagecounter), self.doQuote(userpquota.ident)))
466       
467    def writeUserAccountBalance(self, user, newbalance, newlifetimepaid=None) :   
468       """Sets the new account balance and eventually new lifetime paid."""
469       if newlifetimepaid is not None :
470           self.doModify("UPDATE users SET balance=%s, lifetimepaid=%s WHERE id=%s" % (self.doQuote(newbalance), self.doQuote(newlifetimepaid), self.doQuote(user.ident)))
471       else :   
472           self.doModify("UPDATE users SET balance=%s WHERE id=%s" % (self.doQuote(newbalance), self.doQuote(user.ident)))
473           
474    def writeLastJobSize(self, lastjob, jobsize, jobprice) :       
475        """Sets the last job's size permanently."""
476        self.doModify("UPDATE jobhistory SET jobsize=%s, jobprice=%s WHERE id=%s" % (self.doQuote(jobsize), self.doQuote(jobprice), self.doQuote(lastjob.ident)))
477       
478    def writeJobNew(self, printer, user, jobid, pagecounter, action, jobsize=None, jobprice=None, filename=None, title=None, copies=None, options=None) :   
479        """Adds a job in a printer's history."""
480        if (not self.disablehistory) or (not printer.LastJob.Exists) :
481            if jobsize is not None :
482                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)))
483            else :   
484                self.doModify("INSERT INTO jobhistory (userid, printerid, jobid, pagecounter, action, filename, title, copies, options) VALUES (%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(filename), self.doQuote(title), self.doQuote(copies), self.doQuote(options)))
485        else :       
486            # here we explicitly want to reset jobsize to NULL if needed
487            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)))
488           
489    def writeUserPQuotaLimits(self, userpquota, softlimit, hardlimit) :
490        """Sets soft and hard limits for a user quota."""
491        self.doModify("UPDATE userpquota SET softlimit=%s, hardlimit=%s, datelimit=NULL WHERE id=%s" % (self.doQuote(softlimit), self.doQuote(hardlimit), self.doQuote(userpquota.ident)))
492       
493    def writeGroupPQuotaLimits(self, grouppquota, softlimit, hardlimit) :
494        """Sets soft and hard limits for a group quota on a specific printer."""
495        self.doModify("UPDATE grouppquota SET softlimit=%s, hardlimit=%s, datelimit=NULL WHERE id=%s" % (self.doQuote(softlimit), self.doQuote(hardlimit), self.doQuote(grouppquota.ident)))
496
497    def deleteUser(self, user) :   
498        """Completely deletes an user from the Quota Storage."""
499        # TODO : What should we do if we delete the last person who used a given printer ?
500        # TODO : we can't reassign the last job to the previous one, because next user would be
501        # TODO : incorrectly charged (overcharged).
502        for q in [ 
503                    "DELETE FROM groupsmembers WHERE userid=%s" % self.doQuote(user.ident),
504                    "DELETE FROM jobhistory WHERE userid=%s" % self.doQuote(user.ident),
505                    "DELETE FROM userpquota WHERE userid=%s" % self.doQuote(user.ident),
506                    "DELETE FROM users WHERE id=%s" % self.doQuote(user.ident),
507                  ] :
508            self.doModify(q)
509       
510    def deleteGroup(self, group) :   
511        """Completely deletes a group from the Quota Storage."""
512        for q in [
513                   "DELETE FROM groupsmembers WHERE groupid=%s" % self.doQuote(group.ident),
514                   "DELETE FROM grouppquota WHERE groupid=%s" % self.doQuote(group.ident),
515                   "DELETE FROM groups WHERE id=%s" % self.doQuote(group.ident),
516                 ] : 
517            self.doModify(q)
518       
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