source: main/waeup.kofa/branches/0.2/src/waeup/kofa/hostels/hostel.py @ 14024

Last change on this file since 14024 was 9701, checked in by Henrik Bettermann, 12 years ago

Replace 'has_key' by 'in'
  • Property svn:keywords set to Id
File size: 10.6 KB
Line 
1## $Id: hostel.py 9701 2012-11-20 11:16:38Z henrik $
2##
3## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
4## This program is free software; you can redistribute it and/or modify
5## it under the terms of the GNU General Public License as published by
6## the Free Software Foundation; either version 2 of the License, or
7## (at your option) any later version.
8##
9## This program is distributed in the hope that it will be useful,
10## but WITHOUT ANY WARRANTY; without even the implied warranty of
11## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12## GNU General Public License for more details.
13##
14## You should have received a copy of the GNU General Public License
15## along with this program; if not, write to the Free Software
16## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17##
18"""
19These are the hostels.
20"""
21import grok
22from zope.event import notify
23from zope.component import getUtility
24from zope.component.interfaces import IFactory
25from datetime import datetime
26from waeup.kofa.utils.helpers import attrs_to_fields
27from waeup.kofa.hostels.vocabularies import NOT_OCCUPIED
28from waeup.kofa.hostels.interfaces import IHostel, IBed
29from waeup.kofa.students.interfaces import IBedTicket
30from waeup.kofa.interfaces import IKofaUtils
31from waeup.kofa.interfaces import MessageFactory as _
32from waeup.kofa.utils.helpers import now
33
34class Hostel(grok.Container):
35    """This is a hostel.
36    """
37    grok.implements(IHostel)
38    grok.provides(IHostel)
39
40    def loggerInfo(self, ob_class, comment=None):
41        target = self.__name__
42        return grok.getSite()['hostels'].logger_info(ob_class,target,comment)
43
44    @property
45    def bed_statistics(self):
46        total = len(self.keys())
47        booked = 0
48        for value in self.values():
49            if value.owner != NOT_OCCUPIED:
50                booked += 1
51        return {'booked':booked, 'total':total}
52
53    def clearHostel(self):
54        """Remove all beds
55        """
56        keys = [i for i in self.keys()] # create deep copy
57        for bed in keys:
58            del self[bed]
59        return
60
61    def addBed(self, bed):
62        """Add a bed.
63        """
64        if not IBed.providedBy(bed):
65            raise TypeError(
66                'Hostels contain only IBed instances')
67        self[bed.bed_id] = bed
68        return
69
70    def updateBeds(self):
71        """Fill hostel with beds or update beds.
72        """
73        added_counter = 0
74        modified_counter = 0
75        removed_counter = 0
76        modified_beds = u''
77
78        # Remove all empty beds. Occupied beds remain in hostel!
79        keys = list(self.keys()) # create list copy
80        for key in keys:
81            if self[key].owner == NOT_OCCUPIED:
82                del self[key]
83                self._p_changed = True
84                removed_counter += 1
85            else:
86                self[key].bed_number = 9999
87        remaining = len(keys) - removed_counter
88
89        blocks_for_female = getattr(self,'blocks_for_female',[])
90        blocks_for_male = getattr(self,'blocks_for_male',[])
91        beds_for_fresh = getattr(self,'beds_for_fresh',[])
92        beds_for_pre = getattr(self,'beds_for_pre',[])
93        beds_for_returning = getattr(self,'beds_for_returning',[])
94        beds_for_final = getattr(self,'beds_for_final',[])
95        beds_for_all = getattr(self,'beds_for_all',[])
96        beds_reserved = getattr(self,'beds_reserved',[])
97        all_blocks = blocks_for_female + blocks_for_male
98        all_beds = (beds_for_pre + beds_for_fresh +
99            beds_for_returning + beds_for_final + beds_for_all)
100        for block in all_blocks:
101            sex = 'male'
102            if block in blocks_for_female:
103                sex = 'female'
104            for floor in range(1,int(self.floors_per_block)+1):
105                for room in range(1,int(self.rooms_per_floor)+1):
106                    for bed in all_beds:
107                        room_nr = floor*100 + room
108                        bt = 'all'
109                        if '%s_%s_%s' % (block,room_nr,bed) in beds_reserved:
110                            bt = "reserved"
111                        elif bed in beds_for_fresh:
112                            bt = 'fr'
113                        elif bed in beds_for_pre:
114                            bt = 'pr'
115                        elif bed in beds_for_final:
116                            bt = 'fi'
117                        elif bed in beds_for_returning:
118                            bt = 're'
119                        bt = u'%s_%s_%s' % (self.special_handling,sex,bt)
120                        uid = u'%s_%s_%d_%s' % (self.hostel_id,block,room_nr,bed)
121                        if uid in self:
122                            bed = self[uid]
123                            # Renumber remaining beds
124                            bed.bed_number = len(self) + 1 - remaining
125                            remaining -= 1
126                            if bed.bed_type != bt:
127                                bed.bed_type = bt
128                                modified_counter += 1
129                                modified_beds += '%s, ' % uid
130                                notify(grok.ObjectModifiedEvent(bed))
131                        else:
132                            bed = Bed()
133                            bed.bed_id = uid
134                            bed.bed_type = bt
135                            bed.bed_number = len(self) + 1 - remaining
136                            bed.owner = NOT_OCCUPIED
137                            self.addBed(bed)
138                            added_counter +=1
139        return removed_counter, added_counter, modified_counter, modified_beds
140
141Hostel = attrs_to_fields(Hostel)
142
143class Bed(grok.Container):
144    """This is a bed.
145    """
146    grok.implements(IBed)
147    grok.provides(IBed)
148
149    @property
150    def coordinates(self):
151        """Determine the coordinates from the bed_id.
152        """
153        return self.bed_id.split('_')
154
155    # The following property attributes are only needed
156    # for the exporter to ease evaluation with  Excel.
157
158    @property
159    def hall(self):
160        return self.coordinates[0]
161
162    @property
163    def block(self):
164        return self.coordinates[1]
165
166    @property
167    def room(self):
168        return self.coordinates[2]
169
170    @property
171    def bed(self):
172        return self.coordinates[3]
173
174    @property
175    def special_handling(self):
176        return self.bed_type.split('_')[0]
177
178    @property
179    def sex(self):
180        return self.bed_type.split('_')[1]
181
182    @property
183    def bt(self):
184        return self.bed_type.split('_')[2]
185
186
187    def bookBed(self, student_id):
188        if self.owner == NOT_OCCUPIED:
189            self.owner = student_id
190            notify(grok.ObjectModifiedEvent(self))
191            return None
192        else:
193            return self.owner
194
195    def switchReservation(self):
196        """Reserves or unreserve bed respectively.
197        """
198        sh, sex, bt = self.bed_type.split('_')
199        hostel_id, block, room_nr, bed = self.coordinates
200        hostel = self.__parent__
201        beds_for_fresh = getattr(hostel,'beds_for_fresh',[])
202        beds_for_pre = getattr(hostel,'beds_for_pre',[])
203        beds_for_returning = getattr(hostel,'beds_for_returning',[])
204        beds_for_final = getattr(hostel,'beds_for_final',[])
205        bed_string = u'%s_%s_%s' % (block, room_nr, bed)
206        if bt == 'reserved':
207            bt = 'all'
208            if bed in beds_for_fresh:
209                bt = 'fr'
210            elif bed in beds_for_pre:
211                bt = 'pr'
212            elif bed in beds_for_final:
213                bt = 'fi'
214            elif bed in beds_for_returning:
215                bt = 're'
216            bt = u'%s_%s_%s' % (sh, sex, bt)
217
218            # Comment of Martijn:
219            # If you have a non-Persistent subobject (like a list) and
220            # you change it, you need to manually flag the persistence
221            # machinery on the object that its subobject changed, with
222            # _p_changed. This is only necessary if some of the
223            # objects are not sublclasses of Persistent. For common
224            # built-in collections in Python such as list and
225            # dictionary there are replacements (PersistentList,
226            # PersistentMapping), and more advanced building blocks
227            # for indexes (BTrees), that don't have this issue.
228            #hostel._p_changed = True
229
230            # Henrik: Unfortunately, this doesn't work in our case.
231            # After restarting the portal,
232            # added or removed list items are gone. The only way to ensure
233            # persistance is to reassign the list attribute.
234            br = hostel.beds_reserved
235            br.remove(bed_string)
236            hostel.beds_reserved = br
237            message = _(u'unreserved')
238        else:
239            bt = u'%s_%s_reserved' % (sh, sex)
240            # See comment above
241            br = hostel.beds_reserved
242            br.append(bed_string)
243            hostel.beds_reserved = br
244            message = _(u'reserved')
245        self.bed_type = bt
246        notify(grok.ObjectModifiedEvent(self))
247        return message
248
249    def releaseBed(self):
250        if self.owner == NOT_OCCUPIED:
251            return
252        else:
253            old_owner = self.owner
254            self.owner = NOT_OCCUPIED
255            notify(grok.ObjectModifiedEvent(self))
256            accommodation_session = grok.getSite()[
257                'hostels'].accommodation_session
258            try:
259                bedticket = grok.getSite()['students'][old_owner][
260                              'accommodation'][str(accommodation_session)]
261            except KeyError:
262                return '%s without bed ticket' % old_owner
263            bedticket.bed = None
264            tz = getUtility(IKofaUtils).tzinfo
265            timestamp = now(tz).strftime("%Y-%m-%d %H:%M:%S %Z")
266            bedticket.bed_coordinates = u'-- booking cancelled on %s --' % (
267                timestamp,)
268            return old_owner
269
270    def loggerInfo(self, ob_class, comment=None):
271        target = self.__name__
272        return grok.getSite()['hostels'].logger_info(ob_class,target,comment)
273
274Bed = attrs_to_fields(Bed)
275
276class HostelFactory(grok.GlobalUtility):
277    """A factory for hostels.
278
279    We need this factory for the hostel processor.
280    """
281    grok.implements(IFactory)
282    grok.name(u'waeup.Hostel')
283    title = u"Create a new hostel.",
284    description = u"This factory instantiates new hostel instances."
285
286    def __call__(self, *args, **kw):
287        return Hostel()
288
289    def getInterfaces(self):
290        return implementedBy(Hostel)
291
292
293@grok.subscribe(IBedTicket, grok.IObjectRemovedEvent)
294def handle_bedticket_removed(bedticket, event):
295    """If a bed ticket is deleted, we make sure that also the owner attribute
296    of the bed is cleared (set to NOT_OCCUPIED).
297    """
298    if bedticket.bed != None:
299        bedticket.bed.owner = NOT_OCCUPIED
300        notify(grok.ObjectModifiedEvent(bedticket.bed))
301
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