source: main/waeup.kofa/trunk/src/waeup/kofa/hostels/hostel.py @ 13170

Last change on this file since 13170 was 13170, checked in by Henrik Bettermann, 9 years ago

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1## $Id: hostel.py 13170 2015-07-15 11:26:22Z 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    @property
41    def bed_statistics(self):
42        total = len(self.keys())
43        booked = 0
44        for value in self.values():
45            if value.owner != NOT_OCCUPIED:
46                booked += 1
47        return {'booked':booked, 'total':total}
48
49    def clearHostel(self):
50        """Remove all beds
51        """
52        keys = [i for i in self.keys()] # create deep copy
53        for bed in keys:
54            del self[bed]
55        return
56
57    def addBed(self, bed):
58        """Add a bed.
59        """
60        if not IBed.providedBy(bed):
61            raise TypeError(
62                'Hostels contain only IBed instances')
63        self[bed.bed_id] = bed
64        return
65
66    def updateBeds(self):
67        """Fill hostel with beds or update beds.
68        """
69        added_counter = 0
70        modified_counter = 0
71        removed_counter = 0
72        modified_beds = u''
73
74        # Remove all empty beds. Occupied beds remain in hostel!
75        keys = list(self.keys()) # create list copy
76        for key in keys:
77            if self[key].owner == NOT_OCCUPIED:
78                del self[key]
79                self._p_changed = True
80                removed_counter += 1
81            else:
82                self[key].bed_number = 9999
83        remaining = len(keys) - removed_counter
84
85        blocks_for_female = getattr(self,'blocks_for_female',[])
86        blocks_for_male = getattr(self,'blocks_for_male',[])
87        beds_for_fresh = getattr(self,'beds_for_fresh',[])
88        beds_for_pre = getattr(self,'beds_for_pre',[])
89        beds_for_returning = getattr(self,'beds_for_returning',[])
90        beds_for_final = getattr(self,'beds_for_final',[])
91        beds_for_all = getattr(self,'beds_for_all',[])
92        beds_reserved = getattr(self,'beds_reserved',[])
93        all_blocks = blocks_for_female + blocks_for_male
94        all_beds = (beds_for_pre + beds_for_fresh +
95            beds_for_returning + beds_for_final + beds_for_all)
96        for block in all_blocks:
97            sex = 'male'
98            if block in blocks_for_female:
99                sex = 'female'
100            for floor in range(1,int(self.floors_per_block)+1):
101                for room in range(1,int(self.rooms_per_floor)+1):
102                    for bed in all_beds:
103                        room_nr = floor*100 + room
104                        bt = 'all'
105                        if '%s_%s_%s' % (block,room_nr,bed) in beds_reserved:
106                            bt = "reserved"
107                        elif bed in beds_for_fresh:
108                            bt = 'fr'
109                        elif bed in beds_for_pre:
110                            bt = 'pr'
111                        elif bed in beds_for_final:
112                            bt = 'fi'
113                        elif bed in beds_for_returning:
114                            bt = 're'
115                        bt = u'%s_%s_%s' % (self.special_handling,sex,bt)
116                        uid = u'%s_%s_%d_%s' % (
117                            self.hostel_id,block,room_nr,bed)
118                        if uid in self:
119                            bed = self[uid]
120                            # Renumber remaining bed
121                            bed.bed_number = len(self) + 1 - remaining
122                            remaining -= 1
123                            if bed.bed_type != bt:
124                                bed.bed_type = bt
125                                modified_counter += 1
126                                modified_beds += '%s, ' % uid
127                                notify(grok.ObjectModifiedEvent(bed))
128                        else:
129                            bed = Bed()
130                            bed.bed_id = uid
131                            bed.bed_type = bt
132                            bed.bed_number = len(self) + 1 - remaining
133                            bed.owner = NOT_OCCUPIED
134                            self.addBed(bed)
135                            added_counter +=1
136        return removed_counter, added_counter, modified_counter, modified_beds
137
138    def writeLogMessage(self, view, message):
139        ob_class = view.__implemented__.__name__.replace('waeup.kofa.','')
140        self.__parent__.logger.info(
141            '%s - %s - %s' % (ob_class, self.__name__, message))
142        return
143
144Hostel = attrs_to_fields(Hostel)
145
146class Bed(grok.Container):
147    """This is a bed.
148    """
149    grok.implements(IBed)
150    grok.provides(IBed)
151
152    @property
153    def coordinates(self):
154        """Determine the coordinates from the bed_id.
155        """
156        return self.bed_id.split('_')
157
158    # The following property attributes are only needed
159    # for the exporter to ease evaluation with Excel.
160
161    @property
162    def hall(self):
163        return self.coordinates[0]
164
165    @property
166    def block(self):
167        return self.coordinates[1]
168
169    @property
170    def room(self):
171        return self.coordinates[2]
172
173    @property
174    def bed(self):
175        return self.coordinates[3]
176
177    @property
178    def special_handling(self):
179        return self.bed_type.split('_')[0]
180
181    @property
182    def sex(self):
183        return self.bed_type.split('_')[1]
184
185    @property
186    def bt(self):
187        return self.bed_type.split('_')[2]
188
189
190    def bookBed(self, student_id):
191        if self.owner == NOT_OCCUPIED:
192            self.owner = student_id
193            notify(grok.ObjectModifiedEvent(self))
194            return None
195        else:
196            return self.owner
197
198    def switchReservation(self):
199        """Reserves or unreserve bed respectively.
200        """
201        sh, sex, bt = self.bed_type.split('_')
202        hostel_id, block, room_nr, bed = self.coordinates
203        hostel = self.__parent__
204        beds_for_fresh = getattr(hostel,'beds_for_fresh',[])
205        beds_for_pre = getattr(hostel,'beds_for_pre',[])
206        beds_for_returning = getattr(hostel,'beds_for_returning',[])
207        beds_for_final = getattr(hostel,'beds_for_final',[])
208        bed_string = u'%s_%s_%s' % (block, room_nr, bed)
209        if bt == 'reserved':
210            bt = 'all'
211            if bed in beds_for_fresh:
212                bt = 'fr'
213            elif bed in beds_for_pre:
214                bt = 'pr'
215            elif bed in beds_for_final:
216                bt = 'fi'
217            elif bed in beds_for_returning:
218                bt = 're'
219            bt = u'%s_%s_%s' % (sh, sex, bt)
220
221            # Comment of Martijn:
222            # If you have a non-Persistent subobject (like a list) and
223            # you change it, you need to manually flag the persistence
224            # machinery on the object that its subobject changed, with
225            # _p_changed. This is only necessary if some of the
226            # objects are not sublclasses of Persistent. For common
227            # built-in collections in Python such as list and
228            # dictionary there are replacements (PersistentList,
229            # PersistentMapping), and more advanced building blocks
230            # for indexes (BTrees), that don't have this issue.
231            #hostel._p_changed = True
232
233            # Henrik: Unfortunately, this doesn't work in our case.
234            # After restarting the portal,
235            # added or removed list items are gone. The only way to ensure
236            # persistance is to reassign the list attribute.
237            br = hostel.beds_reserved
238            br.remove(bed_string)
239            hostel.beds_reserved = br
240            message = _(u'unreserved')
241        else:
242            bt = u'%s_%s_reserved' % (sh, sex)
243            # See comment above
244            br = hostel.beds_reserved
245            br.append(bed_string)
246            hostel.beds_reserved = br
247            message = _(u'reserved')
248        self.bed_type = bt
249        notify(grok.ObjectModifiedEvent(self))
250        return message
251
252    def releaseBed(self):
253        if self.owner == NOT_OCCUPIED:
254            return
255        else:
256            old_owner = self.owner
257            self.owner = NOT_OCCUPIED
258            notify(grok.ObjectModifiedEvent(self))
259            accommodation_session = grok.getSite()[
260                'hostels'].accommodation_session
261            try:
262                bedticket = grok.getSite()['students'][old_owner][
263                              'accommodation'][str(accommodation_session)]
264            except KeyError:
265                return '%s without bed ticket' % old_owner
266            bedticket.bed = None
267            tz = getUtility(IKofaUtils).tzinfo
268            timestamp = now(tz).strftime("%Y-%m-%d %H:%M:%S %Z")
269            bedticket.bed_coordinates = u'-- booking cancelled on %s --' % (
270                timestamp,)
271            return old_owner
272
273    def writeLogMessage(self, view, message):
274        ob_class = view.__implemented__.__name__.replace('waeup.kofa.','')
275        self.__parent__.__parent__.logger.info(
276            '%s - %s - %s' % (ob_class, self.__name__, message))
277        return
278
279Bed = attrs_to_fields(Bed)
280
281class HostelFactory(grok.GlobalUtility):
282    """A factory for hostels.
283
284    We need this factory for the hostel processor.
285    """
286    grok.implements(IFactory)
287    grok.name(u'waeup.Hostel')
288    title = u"Create a new hostel.",
289    description = u"This factory instantiates new hostel instances."
290
291    def __call__(self, *args, **kw):
292        return Hostel()
293
294    def getInterfaces(self):
295        return implementedBy(Hostel)
296
297
298@grok.subscribe(IBedTicket, grok.IObjectRemovedEvent)
299def handle_bedticket_removed(bedticket, event):
300    """If a bed ticket is deleted, we make sure that also the owner attribute
301    of the bed is cleared (set to NOT_OCCUPIED).
302    """
303    if bedticket.bed != None:
304        bedticket.bed.owner = NOT_OCCUPIED
305        notify(grok.ObjectModifiedEvent(bedticket.bed))
306
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