imip-agent

Annotated imip_store.py

1046:84c6d38d2c9a
1040:8f2b373a311b
1039:a12150034cbd
2016-02-08 Paul Boddie file changeset files shortlog Introduced compound locking so that information can be in a consistent state for scheduling functions and confirmation functions within the same transaction, unchanged by concurrent transactions.
paul@2 1 
#!/usr/bin/env python
paul@2 2 
 
 paul@146      3 
"""
 
 paul@146      4 
A simple filesystem-based store of calendar data.
 
 paul@146      5 
 
 paul@1039      6 
Copyright (C) 2014, 2015, 2016 Paul Boddie <paul@boddie.org.uk>
 
 paul@146      7 
 
 paul@146      8 
This program is free software; you can redistribute it and/or modify it under
 
 paul@146      9 
the terms of the GNU General Public License as published by the Free Software
 
 paul@146     10 
Foundation; either version 3 of the License, or (at your option) any later
 
 paul@146     11 
version.
 
 paul@146     12 
 
 paul@146     13 
This program is distributed in the hope that it will be useful, but WITHOUT
 
 paul@146     14 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 
 paul@146     15 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 
 paul@146     16 
details.
 
 paul@146     17 
 
 paul@146     18 
You should have received a copy of the GNU General Public License along with
 
 paul@146     19 
this program.  If not, see <http://www.gnu.org/licenses/>.
 
 paul@146     20 
"""
 
 paul@146     21 
 
 paul@30     22 
from datetime import datetime
 
 paul@1039     23 
from imiptools.config import STORE_DIR, PUBLISH_DIR, JOURNAL_DIR
 
 paul@301     24 
from imiptools.data import make_calendar, parse_object, to_stream
 
 paul@740     25 
from imiptools.dates import format_datetime, get_datetime, to_timezone
 
 paul@147     26 
from imiptools.filesys import fix_permissions, FileBase
 
 paul@458     27 
from imiptools.period import FreeBusyPeriod
 
 paul@808     28 
from os.path import isdir, isfile, join
 
 paul@343     29 
from os import listdir, remove, rmdir
 
 paul@303     30 
from time import sleep
 
 paul@395     31 
import codecs
 
 paul@15     32 
 
 paul@1039     33 
class FileStoreBase(FileBase):
 
 paul@50     34 
 
 paul@1039     35 
    "A file store supporting user-specific locking and tabular data."
 
 paul@147     36 
 
 paul@303     37 
    def acquire_lock(self, user, timeout=None):
 
 paul@303     38 
        FileBase.acquire_lock(self, timeout, user)
 
 paul@303     39 
 
 paul@303     40 
    def release_lock(self, user):
 
 paul@303     41 
        FileBase.release_lock(self, user)
 
 paul@303     42 
 
 paul@648     43 
    # Utility methods.
 
 paul@648     44 
 
 paul@343     45 
    def _set_defaults(self, t, empty_defaults):
 
 paul@343     46 
        for i, default in empty_defaults:
 
 paul@343     47 
            if i >= len(t):
 
 paul@343     48 
                t += [None] * (i - len(t) + 1)
 
 paul@343     49 
            if not t[i]:
 
 paul@343     50 
                t[i] = default
 
 paul@343     51 
        return t
 
 paul@343     52 
 
 paul@343     53 
    def _get_table(self, user, filename, empty_defaults=None):
 
 paul@343     54 
 
 paul@343     55 
        """
 
 paul@343     56 
        From the file for the given 'user' having the given 'filename', return
 
 paul@343     57 
        a list of tuples representing the file's contents.
 
 paul@343     58 
 
 paul@343     59 
        The 'empty_defaults' is a list of (index, value) tuples indicating the
 
 paul@343     60 
        default value where a column either does not exist or provides an empty
 
 paul@343     61 
        value.
 
 paul@343     62 
        """
 
 paul@343     63 
 
 paul@702     64 
        f = codecs.open(filename, "rb", encoding="utf-8")
 
 paul@702     65 
        try:
 
 paul@702     66 
            l = []
 
 paul@702     67 
            for line in f.readlines():
 
 paul@702     68 
                t = line.strip(" \r\n").split("\t")
 
 paul@702     69 
                if empty_defaults:
 
 paul@702     70 
                    t = self._set_defaults(t, empty_defaults)
 
 paul@702     71 
                l.append(tuple(t))
 
 paul@702     72 
            return l
 
 paul@702     73 
        finally:
 
 paul@702     74 
            f.close()
 
 paul@702     75 
 
 paul@702     76 
    def _get_table_atomic(self, user, filename, empty_defaults=None):
 
 paul@702     77 
 
 paul@702     78 
        """
 
 paul@702     79 
        From the file for the given 'user' having the given 'filename', return
 
 paul@702     80 
        a list of tuples representing the file's contents.
 
 paul@702     81 
 
 paul@702     82 
        The 'empty_defaults' is a list of (index, value) tuples indicating the
 
 paul@702     83 
        default value where a column either does not exist or provides an empty
 
 paul@702     84 
        value.
 
 paul@702     85 
        """
 
 paul@702     86 
 
 paul@343     87 
        self.acquire_lock(user)
 
 paul@343     88 
        try:
 
 paul@702     89 
            return self._get_table(user, filename, empty_defaults)
 
 paul@343     90 
        finally:
 
 paul@343     91 
            self.release_lock(user)
 
 paul@343     92 
 
 paul@343     93 
    def _set_table(self, user, filename, items, empty_defaults=None):
 
 paul@343     94 
 
 paul@343     95 
        """
 
 paul@343     96 
        For the given 'user', write to the file having the given 'filename' the
 
 paul@343     97 
        'items'.
 
 paul@343     98 
 
 paul@343     99 
        The 'empty_defaults' is a list of (index, value) tuples indicating the
 
 paul@343    100 
        default value where a column either does not exist or provides an empty
 
 paul@343    101 
        value.
 
 paul@343    102 
        """
 
 paul@343    103 
 
 paul@702    104 
        f = codecs.open(filename, "wb", encoding="utf-8")
 
 paul@702    105 
        try:
 
 paul@702    106 
            for item in items:
 
 paul@747    107 
                self._set_table_item(f, item, empty_defaults)
 
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        finally:
 
 paul@702    109 
            f.close()
 
 paul@702    110 
            fix_permissions(filename)
 
 paul@702    111 
 
 paul@747    112 
    def _set_table_item(self, f, item, empty_defaults=None):
 
 paul@747    113 
 
 paul@747    114 
        "Set in table 'f' the given 'item', using any 'empty_defaults'."
 
 paul@747    115 
 
 paul@747    116 
        if empty_defaults:
 
 paul@747    117 
            item = self._set_defaults(list(item), empty_defaults)
 
 paul@747    118 
        f.write("\t".join(item) + "\n")
 
 paul@747    119 
 
 paul@702    120 
    def _set_table_atomic(self, user, filename, items, empty_defaults=None):
 
 paul@702    121 
 
 paul@702    122 
        """
 
 paul@702    123 
        For the given 'user', write to the file having the given 'filename' the
 
 paul@702    124 
        'items'.
 
 paul@702    125 
 
 paul@702    126 
        The 'empty_defaults' is a list of (index, value) tuples indicating the
 
 paul@702    127 
        default value where a column either does not exist or provides an empty
 
 paul@702    128 
        value.
 
 paul@702    129 
        """
 
 paul@702    130 
 
 paul@343    131 
        self.acquire_lock(user)
 
 paul@343    132 
        try:
 
 paul@702    133 
            self._set_table(user, filename, items, empty_defaults)
 
 paul@343    134 
        finally:
 
 paul@343    135 
            self.release_lock(user)
 
 paul@343    136 
 
 paul@1039    137 
class FileStore(FileStoreBase):
 
 paul@1039    138 
 
 paul@1039    139 
    "A file store of tabular free/busy data and objects."
 
 paul@1039    140 
 
 paul@1039    141 
    def __init__(self, store_dir=None):
 
 paul@1039    142 
        FileBase.__init__(self, store_dir or STORE_DIR)
 
 paul@1039    143 
 
 paul@648    144 
    # Store object access.
 
 paul@648    145 
 
 paul@329    146 
    def _get_object(self, user, filename):
 
 paul@329    147 
 
 paul@329    148 
        """
 
 paul@329    149 
        Return the parsed object for the given 'user' having the given
 
 paul@329    150 
        'filename'.
 
 paul@329    151 
        """
 
 paul@329    152 
 
 paul@329    153 
        self.acquire_lock(user)
 
 paul@329    154 
        try:
 
 paul@329    155 
            f = open(filename, "rb")
 
 paul@329    156 
            try:
 
 paul@329    157 
                return parse_object(f, "utf-8")
 
 paul@329    158 
            finally:
 
 paul@329    159 
                f.close()
 
 paul@329    160 
        finally:
 
 paul@329    161 
            self.release_lock(user)
 
 paul@329    162 
 
 paul@329    163 
    def _set_object(self, user, filename, node):
 
 paul@329    164 
 
 paul@329    165 
        """
 
 paul@329    166 
        Set an object for the given 'user' having the given 'filename', using
 
 paul@329    167 
        'node' to define the object.
 
 paul@329    168 
        """
 
 paul@329    169 
 
 paul@329    170 
        self.acquire_lock(user)
 
 paul@329    171 
        try:
 
 paul@329    172 
            f = open(filename, "wb")
 
 paul@329    173 
            try:
 
 paul@329    174 
                to_stream(f, node)
 
 paul@329    175 
            finally:
 
 paul@329    176 
                f.close()
 
 paul@329    177 
                fix_permissions(filename)
 
 paul@329    178 
        finally:
 
 paul@329    179 
            self.release_lock(user)
 
 paul@329    180 
 
 paul@329    181 
        return True
 
 paul@329    182 
 
 paul@329    183 
    def _remove_object(self, filename):
 
 paul@329    184 
 
 paul@329    185 
        "Remove the object with the given 'filename'."
 
 paul@329    186 
 
 paul@329    187 
        try:
 
 paul@329    188 
            remove(filename)
 
 paul@329    189 
        except OSError:
 
 paul@329    190 
            return False
 
 paul@329    191 
 
 paul@329    192 
        return True
 
 paul@329    193 
 
 paul@343    194 
    def _remove_collection(self, filename):
 
 paul@343    195 
 
 paul@343    196 
        "Remove the collection with the given 'filename'."
 
 paul@343    197 
 
 paul@343    198 
        try:
 
 paul@343    199 
            rmdir(filename)
 
 paul@343    200 
        except OSError:
 
 paul@343    201 
            return False
 
 paul@343    202 
 
 paul@343    203 
        return True
 
 paul@343    204 
 
 paul@670    205 
    # User discovery.
 
 paul@670    206 
 
 paul@670    207 
    def get_users(self):
 
 paul@670    208 
 
 paul@670    209 
        "Return a list of users."
 
 paul@670    210 
 
 paul@670    211 
        return listdir(self.store_dir)
 
 paul@670    212 
 
 paul@648    213 
    # Event and event metadata access.
 
 paul@648    214 
 
 paul@119    215 
    def get_events(self, user):
 
 paul@119    216 
 
 paul@119    217 
        "Return a list of event identifiers."
 
 paul@119    218 
 
 paul@138    219 
        filename = self.get_object_in_store(user, "objects")
 
 paul@808    220 
        if not filename or not isdir(filename):
 
 paul@119    221 
            return None
 
 paul@119    222 
 
 paul@119    223 
        return [name for name in listdir(filename) if isfile(join(filename, name))]
 
 paul@119    224 
 
 paul@648    225 
    def get_all_events(self, user):
 
 paul@648    226 
 
 paul@648    227 
        "Return a set of (uid, recurrenceid) tuples for all events."
 
 paul@648    228 
 
 paul@648    229 
        uids = self.get_events(user)
 
 paul@674    230 
        if not uids:
 
 paul@674    231 
            return set()
 
 paul@648    232 
 
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        all_events = set()
 
 paul@648    234 
        for uid in uids:
 
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            all_events.add((uid, None))
 
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            all_events.update([(uid, recurrenceid) for recurrenceid in self.get_recurrences(user, uid)])
 
 paul@648    237 
 
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        return all_events
 
 paul@648    239 
 
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    def get_event_filename(self, user, uid, recurrenceid=None, dirname=None, username=None):
 
 paul@648    241 
 
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        """
 
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        Get the filename providing the event for the given 'user' with the given
 
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        'uid'. If the optional 'recurrenceid' is specified, a specific instance
 
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        or occurrence of an event is returned.
 
 paul@648    246 
 
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        Where 'dirname' is specified, the given directory name is used as the
 
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        base of the location within which any filename will reside.
 
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        """
 
 paul@648    250 
 
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        if recurrenceid:
 
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            return self.get_recurrence_filename(user, uid, recurrenceid, dirname, username)
 
 paul@694    253 
        else:
 
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            return self.get_complete_event_filename(user, uid, dirname, username)
 
 paul@648    255 
 
 paul@858    256 
    def get_event(self, user, uid, recurrenceid=None, dirname=None):
 
 paul@343    257 
 
 paul@343    258 
        """
 
 paul@343    259 
        Get the event for the given 'user' with the given 'uid'. If
 
 paul@343    260 
        the optional 'recurrenceid' is specified, a specific instance or
 
 paul@343    261 
        occurrence of an event is returned.
 
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        """
 
 paul@343    263 
 
 paul@858    264 
        filename = self.get_event_filename(user, uid, recurrenceid, dirname)
 
 paul@808    265 
        if not filename or not isfile(filename):
 
 paul@694    266 
            return None
 
 paul@694    267 
 
 paul@694    268 
        return filename and self._get_object(user, filename)
 
 paul@694    269 
 
 paul@760    270 
    def get_complete_event_filename(self, user, uid, dirname=None, username=None):
 
 paul@694    271 
 
 paul@694    272 
        """
 
 paul@694    273 
        Get the filename providing the event for the given 'user' with the given
 
 paul@694    274 
        'uid'. 
 
 paul@694    275 
 
 paul@694    276 
        Where 'dirname' is specified, the given directory name is used as the
 
 paul@694    277 
        base of the location within which any filename will reside.
 
 paul@760    278 
 
 paul@760    279 
        Where 'username' is specified, the event details will reside in a file
 
 paul@760    280 
        bearing that name within a directory having 'uid' as its name.
 
 paul@694    281 
        """
 
 paul@694    282 
 
 paul@760    283 
        return self.get_object_in_store(user, dirname, "objects", uid, username)
 
 paul@343    284 
 
 paul@343    285 
    def get_complete_event(self, user, uid):
 
 paul@50    286 
 
 paul@50    287 
        "Get the event for the given 'user' with the given 'uid'."
 
 paul@50    288 
 
 paul@694    289 
        filename = self.get_complete_event_filename(user, uid)
 
 paul@808    290 
        if not filename or not isfile(filename):
 
 paul@50    291 
            return None
 
 paul@50    292 
 
 paul@694    293 
        return filename and self._get_object(user, filename)
 
 paul@50    294 
 
 paul@343    295 
    def set_event(self, user, uid, recurrenceid, node):
 
 paul@343    296 
 
 paul@343    297 
        """
 
 paul@343    298 
        Set an event for 'user' having the given 'uid' and 'recurrenceid' (which
 
 paul@343    299 
        if the latter is specified, a specific instance or occurrence of an
 
 paul@343    300 
        event is referenced), using the given 'node' description.
 
 paul@343    301 
        """
 
 paul@343    302 
 
 paul@343    303 
        if recurrenceid:
 
 paul@343    304 
            return self.set_recurrence(user, uid, recurrenceid, node)
 
 paul@343    305 
        else:
 
 paul@343    306 
            return self.set_complete_event(user, uid, node)
 
 paul@343    307 
 
 paul@343    308 
    def set_complete_event(self, user, uid, node):
 
 paul@50    309 
 
 paul@50    310 
        "Set an event for 'user' having the given 'uid' and 'node'."
 
 paul@50    311 
 
 paul@138    312 
        filename = self.get_object_in_store(user, "objects", uid)
 
 paul@50    313 
        if not filename:
 
 paul@50    314 
            return False
 
 paul@50    315 
 
 paul@329    316 
        return self._set_object(user, filename, node)
 
 paul@15    317 
 
 paul@365    318 
    def remove_event(self, user, uid, recurrenceid=None):
 
 paul@234    319 
 
 paul@343    320 
        """
 
 paul@343    321 
        Remove an event for 'user' having the given 'uid'. If the optional
 
 paul@343    322 
        'recurrenceid' is specified, a specific instance or occurrence of an
 
 paul@343    323 
        event is removed.
 
 paul@343    324 
        """
 
 paul@343    325 
 
 paul@343    326 
        if recurrenceid:
 
 paul@343    327 
            return self.remove_recurrence(user, uid, recurrenceid)
 
 paul@343    328 
        else:
 
 paul@343    329 
            for recurrenceid in self.get_recurrences(user, uid) or []:
 
 paul@343    330 
                self.remove_recurrence(user, uid, recurrenceid)
 
 paul@343    331 
            return self.remove_complete_event(user, uid)
 
 paul@343    332 
 
 paul@343    333 
    def remove_complete_event(self, user, uid):
 
 paul@343    334 
 
 paul@234    335 
        "Remove an event for 'user' having the given 'uid'."
 
 paul@234    336 
 
 paul@378    337 
        self.remove_recurrences(user, uid)
 
 paul@369    338 
 
 paul@234    339 
        filename = self.get_object_in_store(user, "objects", uid)
 
 paul@234    340 
        if not filename:
 
 paul@234    341 
            return False
 
 paul@234    342 
 
 paul@329    343 
        return self._remove_object(filename)
 
 paul@234    344 
 
 paul@334    345 
    def get_recurrences(self, user, uid):
 
 paul@334    346 
 
 paul@334    347 
        """
 
 paul@334    348 
        Get additional event instances for an event of the given 'user' with the
 
 paul@694    349 
        indicated 'uid'. Both active and cancelled recurrences are returned.
 
 paul@694    350 
        """
 
 paul@694    351 
 
 paul@694    352 
        return self.get_active_recurrences(user, uid) + self.get_cancelled_recurrences(user, uid)
 
 paul@694    353 
 
 paul@694    354 
    def get_active_recurrences(self, user, uid):
 
 paul@694    355 
 
 paul@694    356 
        """
 
 paul@694    357 
        Get additional event instances for an event of the given 'user' with the
 
 paul@694    358 
        indicated 'uid'. Cancelled recurrences are not returned.
 
 paul@334    359 
        """
 
 paul@334    360 
 
 paul@334    361 
        filename = self.get_object_in_store(user, "recurrences", uid)
 
 paul@808    362 
        if not filename or not isdir(filename):
 
 paul@347    363 
            return []
 
 paul@334    364 
 
 paul@334    365 
        return [name for name in listdir(filename) if isfile(join(filename, name))]
 
 paul@334    366 
 
 paul@694    367 
    def get_cancelled_recurrences(self, user, uid):
 
 paul@694    368 
 
 paul@694    369 
        """
 
 paul@694    370 
        Get additional event instances for an event of the given 'user' with the
 
 paul@694    371 
        indicated 'uid'. Only cancelled recurrences are returned.
 
 paul@694    372 
        """
 
 paul@694    373 
 
 paul@782    374 
        filename = self.get_object_in_store(user, "cancellations", "recurrences", uid)
 
 paul@808    375 
        if not filename or not isdir(filename):
 
 paul@694    376 
            return []
 
 paul@694    377 
 
 paul@694    378 
        return [name for name in listdir(filename) if isfile(join(filename, name))]
 
 paul@694    379 
 
 paul@760    380 
    def get_recurrence_filename(self, user, uid, recurrenceid, dirname=None, username=None):
 
 paul@694    381 
 
 paul@694    382 
        """
 
 paul@694    383 
        For the event of the given 'user' with the given 'uid', return the
 
 paul@694    384 
        filename providing the recurrence with the given 'recurrenceid'.
 
 paul@694    385 
 
 paul@694    386 
        Where 'dirname' is specified, the given directory name is used as the
 
 paul@694    387 
        base of the location within which any filename will reside.
 
 paul@760    388 
 
 paul@760    389 
        Where 'username' is specified, the event details will reside in a file
 
 paul@760    390 
        bearing that name within a directory having 'uid' as its name.
 
 paul@694    391 
        """
 
 paul@694    392 
 
 paul@760    393 
        return self.get_object_in_store(user, dirname, "recurrences", uid, recurrenceid, username)
 
 paul@694    394 
 
 paul@334    395 
    def get_recurrence(self, user, uid, recurrenceid):
 
 paul@334    396 
 
 paul@334    397 
        """
 
 paul@334    398 
        For the event of the given 'user' with the given 'uid', return the
 
 paul@334    399 
        specific recurrence indicated by the 'recurrenceid'.
 
 paul@334    400 
        """
 
 paul@334    401 
 
 paul@694    402 
        filename = self.get_recurrence_filename(user, uid, recurrenceid)
 
 paul@808    403 
        if not filename or not isfile(filename):
 
 paul@334    404 
            return None
 
 paul@334    405 
 
 paul@694    406 
        return filename and self._get_object(user, filename)
 
 paul@334    407 
 
 paul@334    408 
    def set_recurrence(self, user, uid, recurrenceid, node):
 
 paul@334    409 
 
 paul@334    410 
        "Set an event for 'user' having the given 'uid' and 'node'."
 
 paul@334    411 
 
 paul@334    412 
        filename = self.get_object_in_store(user, "recurrences", uid, recurrenceid)
 
 paul@334    413 
        if not filename:
 
 paul@334    414 
            return False
 
 paul@334    415 
 
 paul@334    416 
        return self._set_object(user, filename, node)
 
 paul@334    417 
 
 paul@334    418 
    def remove_recurrence(self, user, uid, recurrenceid):
 
 paul@334    419 
 
 paul@378    420 
        """
 
 paul@378    421 
        Remove a special recurrence from an event stored by 'user' having the
 
 paul@378    422 
        given 'uid' and 'recurrenceid'.
 
 paul@378    423 
        """
 
 paul@334    424 
 
 paul@378    425 
        filename = self.get_object_in_store(user, "recurrences", uid, recurrenceid)
 
 paul@334    426 
        if not filename:
 
 paul@334    427 
            return False
 
 paul@334    428 
 
 paul@334    429 
        return self._remove_object(filename)
 
 paul@334    430 
 
 paul@378    431 
    def remove_recurrences(self, user, uid):
 
 paul@378    432 
 
 paul@378    433 
        """
 
 paul@378    434 
        Remove all recurrences for an event stored by 'user' having the given
 
 paul@378    435 
        'uid'.
 
 paul@378    436 
        """
 
 paul@378    437 
 
 paul@378    438 
        for recurrenceid in self.get_recurrences(user, uid):
 
 paul@378    439 
            self.remove_recurrence(user, uid, recurrenceid)
 
 paul@378    440 
 
 paul@378    441 
        recurrences = self.get_object_in_store(user, "recurrences", uid)
 
 paul@378    442 
        if recurrences:
 
 paul@378    443 
            return self._remove_collection(recurrences)
 
 paul@378    444 
 
 paul@378    445 
        return True
 
 paul@378    446 
 
 paul@652    447 
    # Free/busy period providers, upon extension of the free/busy records.
 
 paul@652    448 
 
 paul@672    449 
    def _get_freebusy_providers(self, user):
 
 paul@672    450 
 
 paul@672    451 
        """
 
 paul@672    452 
        Return the free/busy providers for the given 'user'.
 
 paul@672    453 
 
 paul@672    454 
        This function returns any stored datetime and a list of providers as a
 
 paul@672    455 
        2-tuple. Each provider is itself a (uid, recurrenceid) tuple.
 
 paul@672    456 
        """
 
 paul@672    457 
 
 paul@672    458 
        filename = self.get_object_in_store(user, "freebusy-providers")
 
 paul@808    459 
        if not filename or not isfile(filename):
 
 paul@672    460 
            return None
 
 paul@672    461 
 
 paul@672    462 
        # Attempt to read providers, with a declaration of the datetime
 
 paul@672    463 
        # from which such providers are considered as still being active.
 
 paul@672    464 
 
 paul@702    465 
        t = self._get_table_atomic(user, filename, [(1, None)])
 
 paul@672    466 
        try:
 
 paul@672    467 
            dt_string = t[0][0]
 
 paul@672    468 
        except IndexError:
 
 paul@672    469 
            return None
 
 paul@672    470 
 
 paul@672    471 
        return dt_string, t[1:]
 
 paul@672    472 
 
 paul@652    473 
    def get_freebusy_providers(self, user, dt=None):
 
 paul@652    474 
 
 paul@652    475 
        """
 
 paul@652    476 
        Return a set of uncancelled events of the form (uid, recurrenceid)
 
 paul@652    477 
        providing free/busy details beyond the given datetime 'dt'.
 
 paul@654    478 
 
 paul@654    479 
        If 'dt' is not specified, all events previously found to provide
 
 paul@654    480 
        details will be returned. Otherwise, if 'dt' is earlier than the
 
 paul@654    481 
        datetime recorded for the known providers, None is returned, indicating
 
 paul@654    482 
        that the list of providers must be recomputed.
 
 paul@672    483 
 
 paul@672    484 
        This function returns a list of (uid, recurrenceid) tuples upon success.
 
 paul@652    485 
        """
 
 paul@652    486 
 
 paul@672    487 
        t = self._get_freebusy_providers(user)
 
 paul@672    488 
        if not t:
 
 paul@672    489 
            return None
 
 paul@672    490 
 
 paul@672    491 
        dt_string, t = t
 
 paul@672    492 
 
 paul@672    493 
        # If the requested datetime is earlier than the stated datetime, the
 
 paul@672    494 
        # providers will need to be recomputed.
 
 paul@672    495 
 
 paul@672    496 
        if dt:
 
 paul@672    497 
            providers_dt = get_datetime(dt_string)
 
 paul@672    498 
            if not providers_dt or providers_dt > dt:
 
 paul@672    499 
                return None
 
 paul@672    500 
 
 paul@672    501 
        # Otherwise, return the providers.
 
 paul@672    502 
 
 paul@672    503 
        return t[1:]
 
 paul@672    504 
 
 paul@672    505 
    def _set_freebusy_providers(self, user, dt_string, t):
 
 paul@672    506 
 
 paul@672    507 
        "Set the given provider timestamp 'dt_string' and table 't'."
 
 paul@672    508 
 
 paul@652    509 
        filename = self.get_object_in_store(user, "freebusy-providers")
 
 paul@672    510 
        if not filename:
 
 paul@672    511 
            return False
 
 paul@652    512 
 
 paul@672    513 
        t.insert(0, (dt_string,))
 
 paul@702    514 
        self._set_table_atomic(user, filename, t, [(1, "")])
 
 paul@672    515 
        return True
 
 paul@652    516 
 
 paul@654    517 
    def set_freebusy_providers(self, user, dt, providers):
 
 paul@654    518 
 
 paul@654    519 
        """
 
 paul@654    520 
        Define the uncancelled events providing free/busy details beyond the
 
 paul@654    521 
        given datetime 'dt'.
 
 paul@654    522 
        """
 
 paul@654    523 
 
 paul@672    524 
        t = []
 
 paul@654    525 
 
 paul@654    526 
        for obj in providers:
 
 paul@672    527 
            t.append((obj.get_uid(), obj.get_recurrenceid()))
 
 paul@672    528 
 
 paul@672    529 
        return self._set_freebusy_providers(user, format_datetime(dt), t)
 
 paul@654    530 
 
 paul@672    531 
    def append_freebusy_provider(self, user, provider):
 
 paul@672    532 
 
 paul@672    533 
        "For the given 'user', append the free/busy 'provider'."
 
 paul@672    534 
 
 paul@672    535 
        t = self._get_freebusy_providers(user)
 
 paul@672    536 
        if not t:
 
 paul@654    537 
            return False
 
 paul@654    538 
 
 paul@672    539 
        dt_string, t = t
 
 paul@672    540 
        t.append((provider.get_uid(), provider.get_recurrenceid()))
 
 paul@672    541 
 
 paul@672    542 
        return self._set_freebusy_providers(user, dt_string, t)
 
 paul@672    543 
 
 paul@672    544 
    def remove_freebusy_provider(self, user, provider):
 
 paul@672    545 
 
 paul@672    546 
        "For the given 'user', remove the free/busy 'provider'."
 
 paul@672    547 
 
 paul@672    548 
        t = self._get_freebusy_providers(user)
 
 paul@672    549 
        if not t:
 
 paul@672    550 
            return False
 
 paul@672    551 
 
 paul@672    552 
        dt_string, t = t
 
 paul@672    553 
        try:
 
 paul@672    554 
            t.remove((provider.get_uid(), provider.get_recurrenceid()))
 
 paul@672    555 
        except ValueError:
 
 paul@672    556 
            return False
 
 paul@672    557 
 
 paul@672    558 
        return self._set_freebusy_providers(user, dt_string, t)
 
 paul@654    559 
 
 paul@648    560 
    # Free/busy period access.
 
 paul@648    561 
 
 paul@702    562 
    def get_freebusy(self, user, name=None, get_table=None):
 
 paul@15    563 
 
 paul@15    564 
        "Get free/busy details for the given 'user'."
 
 paul@15    565 
 
 paul@702    566 
        filename = self.get_object_in_store(user, name or "freebusy")
 
 paul@808    567 
        if not filename or not isfile(filename):
 
 paul@167    568 
            return []
 
 paul@112    569 
        else:
 
 paul@702    570 
            return map(lambda t: FreeBusyPeriod(*t),
 
 paul@702    571 
                (get_table or self._get_table_atomic)(user, filename, [(4, None)]))
 
 paul@702    572 
 
 paul@702    573 
    def get_freebusy_for_other(self, user, other, get_table=None):
 
 paul@112    574 
 
 paul@112    575 
        "For the given 'user', get free/busy details for the 'other' user."
 
 paul@112    576 
 
 paul@112    577 
        filename = self.get_object_in_store(user, "freebusy-other", other)
 
 paul@808    578 
        if not filename or not isfile(filename):
 
 paul@167    579 
            return []
 
 paul@112    580 
        else:
 
 paul@702    581 
            return map(lambda t: FreeBusyPeriod(*t),
 
 paul@702    582 
                (get_table or self._get_table_atomic)(user, filename, [(4, None)]))
 
 paul@702    583 
 
 paul@702    584 
    def set_freebusy(self, user, freebusy, name=None, set_table=None):
 
 paul@15    585 
 
 paul@15    586 
        "For the given 'user', set 'freebusy' details."
 
 paul@15    587 
 
 paul@702    588 
        filename = self.get_object_in_store(user, name or "freebusy")
 
 paul@15    589 
        if not filename:
 
 paul@15    590 
            return False
 
 paul@15    591 
 
 paul@702    592 
        (set_table or self._set_table_atomic)(user, filename,
 
 paul@702    593 
            map(lambda fb: fb.as_tuple(strings_only=True), freebusy))
 
 paul@15    594 
        return True
 
 paul@15    595 
 
 paul@702    596 
    def set_freebusy_for_other(self, user, freebusy, other, set_table=None):
 
 paul@110    597 
 
 paul@110    598 
        "For the given 'user', set 'freebusy' details for the 'other' user."
 
 paul@110    599 
 
 paul@110    600 
        filename = self.get_object_in_store(user, "freebusy-other", other)
 
 paul@110    601 
        if not filename:
 
 paul@110    602 
            return False
 
 paul@110    603 
 
 paul@702    604 
        (set_table or self._set_table_atomic)(user, filename,
 
 paul@702    605 
            map(lambda fb: fb.as_tuple(strings_only=True), freebusy))
 
 paul@112    606 
        return True
 
 paul@112    607 
 
 paul@710    608 
    # Tentative free/busy periods related to countering.
 
 paul@710    609 
 
 paul@710    610 
    def get_freebusy_offers(self, user):
 
 paul@710    611 
 
 paul@710    612 
        "Get free/busy offers for the given 'user'."
 
 paul@710    613 
 
 paul@710    614 
        offers = []
 
 paul@710    615 
        expired = []
 
 paul@741    616 
        now = to_timezone(datetime.utcnow(), "UTC")
 
 paul@710    617 
 
 paul@710    618 
        # Expire old offers and save the collection if modified.
 
 paul@710    619 
 
 paul@730    620 
        self.acquire_lock(user)
 
 paul@710    621 
        try:
 
 paul@730    622 
            l = self.get_freebusy(user, "freebusy-offers")
 
 paul@710    623 
            for fb in l:
 
 paul@710    624 
                if fb.expires and get_datetime(fb.expires) <= now:
 
 paul@710    625 
                    expired.append(fb)
 
 paul@710    626 
                else:
 
 paul@710    627 
                    offers.append(fb)
 
 paul@710    628 
 
 paul@710    629 
            if expired:
 
 paul@730    630 
                self.set_freebusy_offers(user, offers)
 
 paul@710    631 
        finally:
 
 paul@730    632 
            self.release_lock(user)
 
 paul@710    633 
 
 paul@710    634 
        return offers
 
 paul@710    635 
 
 paul@710    636 
    def set_freebusy_offers(self, user, freebusy):
 
 paul@710    637 
 
 paul@710    638 
        "For the given 'user', set 'freebusy' offers."
 
 paul@710    639 
 
 paul@710    640 
        return self.set_freebusy(user, freebusy, "freebusy-offers")
 
 paul@710    641 
 
 paul@747    642 
    # Requests and counter-proposals.
 
 paul@648    643 
 
 paul@142    644 
    def _get_requests(self, user, queue):
 
 paul@66    645 
 
 paul@142    646 
        "Get requests for the given 'user' from the given 'queue'."
 
 paul@66    647 
 
 paul@142    648 
        filename = self.get_object_in_store(user, queue)
 
 paul@808    649 
        if not filename or not isfile(filename):
 
 paul@66    650 
            return None
 
 paul@66    651 
 
 paul@747    652 
        return self._get_table_atomic(user, filename, [(1, None), (2, None)])
 
 paul@66    653 
 
 paul@142    654 
    def get_requests(self, user):
 
 paul@142    655 
 
 paul@142    656 
        "Get requests for the given 'user'."
 
 paul@142    657 
 
 paul@142    658 
        return self._get_requests(user, "requests")
 
 paul@142    659 
 
 paul@142    660 
    def _set_requests(self, user, requests, queue):
 
 paul@66    661 
 
 paul@142    662 
        """
 
 paul@142    663 
        For the given 'user', set the list of queued 'requests' in the given
 
 paul@142    664 
        'queue'.
 
 paul@142    665 
        """
 
 paul@142    666 
 
 paul@142    667 
        filename = self.get_object_in_store(user, queue)
 
 paul@66    668 
        if not filename:
 
 paul@66    669 
            return False
 
 paul@66    670 
 
 paul@747    671 
        self._set_table_atomic(user, filename, requests, [(1, ""), (2, "")])
 
 paul@66    672 
        return True
 
 paul@66    673 
 
 paul@142    674 
    def set_requests(self, user, requests):
 
 paul@142    675 
 
 paul@142    676 
        "For the given 'user', set the list of queued 'requests'."
 
 paul@142    677 
 
 paul@142    678 
        return self._set_requests(user, requests, "requests")
 
 paul@142    679 
 
 paul@747    680 
    def _set_request(self, user, request, queue):
 
 paul@142    681 
 
 paul@343    682 
        """
 
 paul@747    683 
        For the given 'user', set the given 'request' in the given 'queue'.
 
 paul@343    684 
        """
 
 paul@142    685 
 
 paul@142    686 
        filename = self.get_object_in_store(user, queue)
 
 paul@55    687 
        if not filename:
 
 paul@55    688 
            return False
 
 paul@55    689 
 
 paul@303    690 
        self.acquire_lock(user)
 
 paul@55    691 
        try:
 
 paul@747    692 
            f = codecs.open(filename, "ab", encoding="utf-8")
 
 paul@303    693 
            try:
 
 paul@747    694 
                self._set_table_item(f, request, [(1, ""), (2, "")])
 
 paul@303    695 
            finally:
 
 paul@303    696 
                f.close()
 
 paul@303    697 
                fix_permissions(filename)
 
 paul@55    698 
        finally:
 
 paul@303    699 
            self.release_lock(user)
 
 paul@55    700 
 
 paul@55    701 
        return True
 
 paul@55    702 
 
 paul@747    703 
    def set_request(self, user, uid, recurrenceid=None, type=None):
 
 paul@142    704 
 
 paul@747    705 
        """
 
 paul@747    706 
        For the given 'user', set the queued 'uid' and 'recurrenceid',
 
 paul@747    707 
        indicating a request, along with any given 'type'.
 
 paul@747    708 
        """
 
 paul@142    709 
 
 paul@747    710 
        return self._set_request(user, (uid, recurrenceid, type), "requests")
 
 paul@747    711 
 
 paul@747    712 
    def queue_request(self, user, uid, recurrenceid=None, type=None):
 
 paul@142    713 
 
 paul@343    714 
        """
 
 paul@343    715 
        Queue a request for 'user' having the given 'uid'. If the optional
 
 paul@747    716 
        'recurrenceid' is specified, the entry refers to a specific instance
 
 paul@747    717 
        or occurrence of an event. The 'type' parameter can be used to indicate
 
 paul@747    718 
        a specific type of request.
 
 paul@747    719 
        """
 
 paul@747    720 
 
 paul@747    721 
        requests = self.get_requests(user) or []
 
 paul@747    722 
 
 paul@747    723 
        if not self.have_request(requests, uid, recurrenceid):
 
 paul@747    724 
            return self.set_request(user, uid, recurrenceid, type)
 
 paul@747    725 
 
 paul@747    726 
        return False
 
 paul@747    727 
 
 paul@840    728 
    def dequeue_request(self, user, uid, recurrenceid=None):
 
 paul@747    729 
 
 paul@747    730 
        """
 
 paul@747    731 
        Dequeue all requests for 'user' having the given 'uid'. If the optional
 
 paul@747    732 
        'recurrenceid' is specified, all requests for that specific instance or
 
 paul@747    733 
        occurrence of an event are dequeued.
 
 paul@343    734 
        """
 
 paul@66    735 
 
 paul@81    736 
        requests = self.get_requests(user) or []
 
 paul@750    737 
        result = []
 
 paul@747    738 
 
 paul@750    739 
        for request in requests:
 
 paul@808    740 
            if request[:2] != (uid, recurrenceid):
 
 paul@750    741 
                result.append(request)
 
 paul@747    742 
 
 paul@750    743 
        self.set_requests(user, result)
 
 paul@747    744 
        return True
 
 paul@747    745 
 
 paul@817    746 
    def has_request(self, user, uid, recurrenceid=None, type=None, strict=False):
 
 paul@817    747 
        return self.have_request(self.get_requests(user) or [], uid, recurrenceid, type, strict)
 
 paul@817    748 
 
 paul@754    749 
    def have_request(self, requests, uid, recurrenceid=None, type=None, strict=False):
 
 paul@754    750 
 
 paul@754    751 
        """
 
 paul@754    752 
        Return whether 'requests' contains a request with the given 'uid' and
 
 paul@754    753 
        any specified 'recurrenceid' and 'type'. If 'strict' is set to a true
 
 paul@754    754 
        value, the precise type of the request must match; otherwise, any type
 
 paul@754    755 
        of request for the identified object may be matched.
 
 paul@754    756 
        """
 
 paul@754    757 
 
 paul@750    758 
        for request in requests:
 
 paul@762    759 
            if request[:2] == (uid, recurrenceid) and (
 
 paul@762    760 
                not strict or
 
 paul@762    761 
                not request[2:] and not type or
 
 paul@762    762 
                request[2:] and request[2] == type):
 
 paul@762    763 
 
 paul@750    764 
                return True
 
 paul@762    765 
 
 paul@750    766 
        return False
 
 paul@747    767 
 
 paul@760    768 
    def get_counters(self, user, uid, recurrenceid=None):
 
 paul@754    769 
 
 paul@754    770 
        """
 
 paul@766    771 
        For the given 'user', return a list of users from whom counter-proposals
 
 paul@766    772 
        have been received for the given 'uid' and optional 'recurrenceid'.
 
 paul@754    773 
        """
 
 paul@754    774 
 
 paul@754    775 
        filename = self.get_event_filename(user, uid, recurrenceid, "counters")
 
 paul@808    776 
        if not filename or not isdir(filename):
 
 paul@754    777 
            return False
 
 paul@754    778 
 
 paul@766    779 
        return [name for name in listdir(filename) if isfile(join(filename, name))]
 
 paul@760    780 
 
 paul@760    781 
    def get_counter(self, user, other, uid, recurrenceid=None):
 
 paul@105    782 
 
 paul@343    783 
        """
 
 paul@760    784 
        For the given 'user', return the counter-proposal from 'other' for the
 
 paul@760    785 
        given 'uid' and optional 'recurrenceid'.
 
 paul@760    786 
        """
 
 paul@760    787 
 
 paul@760    788 
        filename = self.get_event_filename(user, uid, recurrenceid, "counters", other)
 
 paul@760    789 
        if not filename:
 
 paul@760    790 
            return False
 
 paul@760    791 
 
 paul@760    792 
        return self._get_object(user, filename)
 
 paul@760    793 
 
 paul@760    794 
    def set_counter(self, user, other, node, uid, recurrenceid=None):
 
 paul@760    795 
 
 paul@760    796 
        """
 
 paul@760    797 
        For the given 'user', store a counter-proposal received from 'other' the
 
 paul@760    798 
        given 'node' representing that proposal for the given 'uid' and
 
 paul@760    799 
        'recurrenceid'.
 
 paul@760    800 
        """
 
 paul@760    801 
 
 paul@760    802 
        filename = self.get_event_filename(user, uid, recurrenceid, "counters", other)
 
 paul@760    803 
        if not filename:
 
 paul@760    804 
            return False
 
 paul@760    805 
 
 paul@760    806 
        return self._set_object(user, filename, node)
 
 paul@760    807 
 
 paul@760    808 
    def remove_counters(self, user, uid, recurrenceid=None):
 
 paul@760    809 
 
 paul@760    810 
        """
 
 paul@760    811 
        For the given 'user', remove all counter-proposals associated with the
 
 paul@760    812 
        given 'uid' and 'recurrenceid'.
 
 paul@343    813 
        """
 
 paul@105    814 
 
 paul@747    815 
        filename = self.get_event_filename(user, uid, recurrenceid, "counters")
 
 paul@808    816 
        if not filename or not isdir(filename):
 
 paul@747    817 
            return False
 
 paul@747    818 
 
 paul@760    819 
        removed = False
 
 paul@747    820 
 
 paul@760    821 
        for other in listdir(filename):
 
 paul@760    822 
            counter_filename = self.get_event_filename(user, uid, recurrenceid, "counters", other)
 
 paul@760    823 
            removed = removed or self._remove_object(counter_filename)
 
 paul@760    824 
 
 paul@760    825 
        return removed
 
 paul@760    826 
 
 paul@760    827 
    def remove_counter(self, user, other, uid, recurrenceid=None):
 
 paul@105    828 
 
 paul@747    829 
        """
 
 paul@760    830 
        For the given 'user', remove any counter-proposal from 'other'
 
 paul@760    831 
        associated with the given 'uid' and 'recurrenceid'.
 
 paul@747    832 
        """
 
 paul@747    833 
 
 paul@760    834 
        filename = self.get_event_filename(user, uid, recurrenceid, "counters", other)
 
 paul@808    835 
        if not filename or not isfile(filename):
 
 paul@105    836 
            return False
 
 paul@747    837 
 
 paul@747    838 
        return self._remove_object(filename)
 
 paul@747    839 
 
 paul@747    840 
    # Event cancellation.
 
 paul@105    841 
 
 paul@343    842 
    def cancel_event(self, user, uid, recurrenceid=None):
 
 paul@142    843 
 
 paul@343    844 
        """
 
 paul@694    845 
        Cancel an event for 'user' having the given 'uid'. If the optional
 
 paul@694    846 
        'recurrenceid' is specified, a specific instance or occurrence of an
 
 paul@694    847 
        event is cancelled.
 
 paul@343    848 
        """
 
 paul@142    849 
 
 paul@694    850 
        filename = self.get_event_filename(user, uid, recurrenceid)
 
 paul@694    851 
        cancelled_filename = self.get_event_filename(user, uid, recurrenceid, "cancellations")
 
 paul@142    852 
 
 paul@808    853 
        if filename and cancelled_filename and isfile(filename):
 
 paul@694    854 
            return self.move_object(filename, cancelled_filename)
 
 paul@142    855 
 
 paul@142    856 
        return False
 
 paul@142    857 
 
 paul@863    858 
    def uncancel_event(self, user, uid, recurrenceid=None):
 
 paul@863    859 
 
 paul@863    860 
        """
 
 paul@863    861 
        Uncancel an event for 'user' having the given 'uid'. If the optional
 
 paul@863    862 
        'recurrenceid' is specified, a specific instance or occurrence of an
 
 paul@863    863 
        event is uncancelled.
 
 paul@863    864 
        """
 
 paul@863    865 
 
 paul@863    866 
        filename = self.get_event_filename(user, uid, recurrenceid)
 
 paul@863    867 
        cancelled_filename = self.get_event_filename(user, uid, recurrenceid, "cancellations")
 
 paul@863    868 
 
 paul@863    869 
        if filename and cancelled_filename and isfile(cancelled_filename):
 
 paul@863    870 
            return self.move_object(cancelled_filename, filename)
 
 paul@863    871 
 
 paul@863    872 
        return False
 
 paul@863    873 
 
 paul@796    874 
    def remove_cancellations(self, user, uid, recurrenceid=None):
 
 paul@796    875 
 
 paul@796    876 
        """
 
 paul@796    877 
        Remove cancellations for 'user' for any event having the given 'uid'. If
 
 paul@796    878 
        the optional 'recurrenceid' is specified, a specific instance or
 
 paul@796    879 
        occurrence of an event is affected.
 
 paul@796    880 
        """
 
 paul@796    881 
 
 paul@796    882 
        # Remove all recurrence cancellations if a general event is indicated.
 
 paul@796    883 
 
 paul@796    884 
        if not recurrenceid:
 
 paul@796    885 
            for _recurrenceid in self.get_cancelled_recurrences(user, uid):
 
 paul@796    886 
                self.remove_cancellation(user, uid, _recurrenceid)
 
 paul@796    887 
 
 paul@796    888 
        return self.remove_cancellation(user, uid, recurrenceid)
 
 paul@796    889 
 
 paul@796    890 
    def remove_cancellation(self, user, uid, recurrenceid=None):
 
 paul@796    891 
 
 paul@796    892 
        """
 
 paul@796    893 
        Remove a cancellation for 'user' for the event having the given 'uid'.
 
 paul@796    894 
        If the optional 'recurrenceid' is specified, a specific instance or
 
 paul@796    895 
        occurrence of an event is affected.
 
 paul@796    896 
        """
 
 paul@796    897 
 
 paul@796    898 
        # Remove any parent event cancellation or a specific recurrence
 
 paul@796    899 
        # cancellation if indicated.
 
 paul@796    900 
 
 paul@796    901 
        filename = self.get_event_filename(user, uid, recurrenceid, "cancellations")
 
 paul@796    902 
 
 paul@808    903 
        if filename and isfile(filename):
 
 paul@796    904 
            return self._remove_object(filename)
 
 paul@796    905 
 
 paul@796    906 
        return False
 
 paul@796    907 
 
 paul@30    908 
class FilePublisher(FileBase):
 
 paul@30    909 
 
 paul@30    910 
    "A publisher of objects."
 
 paul@30    911 
 
 paul@597    912 
    def __init__(self, store_dir=None):
 
 paul@597    913 
        FileBase.__init__(self, store_dir or PUBLISH_DIR)
 
 paul@30    914 
 
 paul@30    915 
    def set_freebusy(self, user, freebusy):
 
 paul@30    916 
 
 paul@30    917 
        "For the given 'user', set 'freebusy' details."
 
 paul@30    918 
 
 paul@52    919 
        filename = self.get_object_in_store(user, "freebusy")
 
 paul@30    920 
        if not filename:
 
 paul@30    921 
            return False
 
 paul@30    922 
 
 paul@30    923 
        record = []
 
 paul@30    924 
        rwrite = record.append
 
 paul@30    925 
 
 paul@30    926 
        rwrite(("ORGANIZER", {}, user))
 
 paul@30    927 
        rwrite(("UID", {}, user))
 
 paul@30    928 
        rwrite(("DTSTAMP", {}, datetime.utcnow().strftime("%Y%m%dT%H%M%SZ")))
 
 paul@30    929 
 
 paul@458    930 
        for fb in freebusy:
 
 paul@458    931 
            if not fb.transp or fb.transp == "OPAQUE":
 
 paul@529    932 
                rwrite(("FREEBUSY", {"FBTYPE" : "BUSY"}, "/".join(
 
 paul@563    933 
                    map(format_datetime, [fb.get_start_point(), fb.get_end_point()]))))
 
 paul@30    934 
 
 paul@395    935 
        f = open(filename, "wb")
 
 paul@30    936 
        try:
 
 paul@30    937 
            to_stream(f, make_calendar([("VFREEBUSY", {}, record)], "PUBLISH"))
 
 paul@30    938 
        finally:
 
 paul@30    939 
            f.close()
 
 paul@103    940 
            fix_permissions(filename)
 
 paul@30    941 
 
 paul@30    942 
        return True
 
 paul@30    943 
 
 paul@1039    944 
class FileJournal(FileStoreBase):
 
 paul@1039    945 
 
 paul@1039    946 
    "A journal system to support quotas."
 
 paul@1039    947 
 
 paul@1039    948 
    def __init__(self, store_dir=None):
 
 paul@1039    949 
        FileBase.__init__(self, store_dir or JOURNAL_DIR)
 
 paul@1039    950 
 
 paul@1039    951 
    # Groups of users sharing quotas.
 
 paul@1039    952 
 
 paul@1039    953 
    def get_groups(self, quota):
 
 paul@1039    954 
 
 paul@1039    955 
        "Return the identity mappings for the given 'quota' as a dictionary."
 
 paul@1039    956 
 
 paul@1039    957 
        filename = self.get_object_in_store(quota, "groups")
 
 paul@1039    958 
        if not filename or not isfile(filename):
 
 paul@1039    959 
            return {}
 
 paul@1039    960 
 
 paul@1039    961 
        return dict(self._get_table_atomic(quota, filename))
 
 paul@1039    962 
 
 paul@1039    963 
    def get_limits(self, quota):
 
 paul@1039    964 
 
 paul@1039    965 
        """
 
 paul@1039    966 
        Return the limits for the 'quota' as a dictionary mapping identities or
 
 paul@1039    967 
        groups to durations.
 
 paul@1039    968 
        """
 
 paul@1039    969 
 
 paul@1039    970 
        filename = self.get_object_in_store(quota, "limits")
 
 paul@1039    971 
        if not filename or not isfile(filename):
 
 paul@1039    972 
            return None
 
 paul@1039    973 
 
 paul@1039    974 
        return dict(self._get_table_atomic(quota, filename))
 
 paul@1039    975 
 
 paul@1039    976 
    # Free/busy period access.
 
 paul@1039    977 
 
 paul@1039    978 
    def get_freebusy(self, quota, user, get_table=None):
 
 paul@1039    979 
 
 paul@1039    980 
        "Get free/busy details for the given 'quota' and 'user'."
 
 paul@1039    981 
 
 paul@1039    982 
        filename = self.get_object_in_store(quota, "freebusy", user)
 
 paul@1039    983 
        if not filename or not isfile(filename):
 
 paul@1039    984 
            return []
 
 paul@1039    985 
        else:
 
 paul@1039    986 
            return map(lambda t: FreeBusyPeriod(*t),
 
 paul@1039    987 
                (get_table or self._get_table_atomic)(quota, filename, [(4, None)]))
 
 paul@1039    988 
 
 paul@1039    989 
    def set_freebusy(self, quota, user, freebusy, set_table=None):
 
 paul@1039    990 
 
 paul@1039    991 
        "For the given 'quota' and 'user', set 'freebusy' details."
 
 paul@1039    992 
 
 paul@1039    993 
        filename = self.get_object_in_store(quota, "freebusy", user)
 
 paul@1039    994 
        if not filename:
 
 paul@1039    995 
            return False
 
 paul@1039    996 
 
 paul@1039    997 
        (set_table or self._set_table_atomic)(quota, filename,
 
 paul@1039    998 
            map(lambda fb: fb.as_tuple(strings_only=True), freebusy))
 
 paul@1039    999 
        return True
 
 paul@1039   1000 
 
 paul@1039   1001 
    # Journal entry methods.
 
 paul@1039   1002 
 
 paul@1039   1003 
    def get_entries(self, quota, group):
 
 paul@1039   1004 
 
 paul@1039   1005 
        """
 
 paul@1039   1006 
        Return a list of journal entries for the given 'quota' for the indicated
 
 paul@1039   1007 
        'group'.
 
 paul@1039   1008 
        """
 
 paul@1039   1009 
 
 paul@1039   1010 
        filename = self.get_object_in_store(quota, "journal", group)
 
 paul@1039   1011 
        if not filename or not isfile(filename):
 
 paul@1039   1012 
            return []
 
 paul@1039   1013 
 
 paul@1039   1014 
        return self._get_table_atomic(quota, filename, [(1, None)])
 
 paul@1039   1015 
 
 paul@1039   1016 
    def set_entries(self, quota, group, entries):
 
 paul@1039   1017 
 
 paul@1039   1018 
        """
 
 paul@1039   1019 
        For the given 'quota' and indicated 'group', set the list of journal
 
 paul@1039   1020 
        'entries'.
 
 paul@1039   1021 
        """
 
 paul@1039   1022 
 
 paul@1039   1023 
        filename = self.get_object_in_store(quota, "journal", group)
 
 paul@1039   1024 
        if not filename:
 
 paul@1039   1025 
            return False
 
 paul@1039   1026 
 
 paul@1039   1027 
        self._set_table_atomic(quota, filename, entries, [(1, "")])
 
 paul@1039   1028 
        return True
 
 paul@1039   1029 
 
 paul@2   1030 
# vim: tabstop=4 expandtab shiftwidth=4