2 This file is part of notmuch.
4 Notmuch is free software: you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation, either version 3 of the License, or (at your
7 option) any later version.
9 Notmuch is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with notmuch. If not, see <http://www.gnu.org/licenses/>.
17 Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
21 from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref, POINTER
22 from notmuch.globals import (nmlib, STATUS, NotmuchError, NotInitializedError,
23 NullPointerError, OutOfMemoryError, XapianError, Enum, _str,
24 NotmuchDatabaseP, NotmuchDirectoryP, NotmuchMessageP, NotmuchTagsP,
25 NotmuchQueryP, NotmuchMessagesP, NotmuchThreadsP, NotmuchFilenamesP)
26 from notmuch.thread import Threads
27 from notmuch.message import Messages, Message
28 from notmuch.tag import Tags
30 class Database(object):
31 """The :class:`Database` is the highest-level object that notmuch
32 provides. It references a notmuch database, and can be opened in
33 read-only or read-write mode. A :class:`Query` can be derived from
34 or be applied to a specific database to find messages. Also adding
35 and removing messages to the database happens via this
36 object. Modifications to the database are not atmic by default (see
37 :meth:`begin_atomic`) and once a database has been modified, all
38 other database objects pointing to the same data-base will throw an
39 :exc:`XapianError` as the underlying database has been
40 modified. Close and reopen the database to continue working with it.
42 .. note:: Any function in this class can and will throw an
43 :exc:`NotInitializedError` if the database was not
44 intitialized properly.
46 .. note:: Do remember that as soon as we tear down (e.g. via `del
47 db`) this object, all underlying derived objects such as
48 queries, threads, messages, tags etc will be freed by the
49 underlying library as well. Accessing these objects will lead
50 to segfaults and other unexpected behavior. See above for
54 """Class attribute to cache user's default database"""
56 MODE = Enum(['READ_ONLY', 'READ_WRITE'])
57 """Constants: Mode in which to open the database"""
59 """notmuch_database_get_directory"""
60 _get_directory = nmlib.notmuch_database_get_directory
61 _get_directory.argtypes = [NotmuchDatabaseP, c_char_p]
62 _get_directory.restype = NotmuchDirectoryP
64 """notmuch_database_get_path"""
65 _get_path = nmlib.notmuch_database_get_path
66 _get_path.argtypes = [NotmuchDatabaseP]
67 _get_path.restype = c_char_p
69 """notmuch_database_get_version"""
70 _get_version = nmlib.notmuch_database_get_version
71 _get_version.argtypes = [NotmuchDatabaseP]
72 _get_version.restype = c_uint
74 """notmuch_database_open"""
75 _open = nmlib.notmuch_database_open
76 _open.argtypes = [c_char_p, c_uint]
77 _open.restype = NotmuchDatabaseP
79 """notmuch_database_upgrade"""
80 _upgrade = nmlib.notmuch_database_upgrade
81 _upgrade.argtypes = [NotmuchDatabaseP, c_void_p, c_void_p]
82 _upgrade.restype = c_uint
84 """ notmuch_database_find_message"""
85 _find_message = nmlib.notmuch_database_find_message
86 _find_message.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)]
87 _find_message.restype = c_uint
89 """notmuch_database_find_message_by_filename"""
90 _find_message_by_filename = nmlib.notmuch_database_find_message_by_filename
91 _find_message_by_filename.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)]
92 _find_message_by_filename.restype = c_uint
94 """notmuch_database_get_all_tags"""
95 _get_all_tags = nmlib.notmuch_database_get_all_tags
96 _get_all_tags.argtypes = [NotmuchDatabaseP]
97 _get_all_tags.restype = NotmuchTagsP
99 """notmuch_database_create"""
100 _create = nmlib.notmuch_database_create
101 _create.argtypes = [c_char_p]
102 _create.restype = NotmuchDatabaseP
104 def __init__(self, path=None, create=False, mode=0):
105 """If *path* is `None`, we will try to read a users notmuch
106 configuration and use his configured database. The location of the
107 configuration file can be specified through the environment variable
108 *NOTMUCH_CONFIG*, falling back to the default `~/.notmuch-config`.
110 If *create* is `True`, the database will always be created in
111 :attr:`MODE`.READ_WRITE mode. Default mode for opening is READ_ONLY.
113 :param path: Directory to open/create the database in (see
114 above for behavior if `None`)
115 :type path: `str` or `None`
116 :param create: Pass `False` to open an existing, `True` to create a new
119 :param mode: Mode to open a database in. Is always
120 :attr:`MODE`.READ_WRITE when creating a new one.
121 :type mode: :attr:`MODE`
122 :exception: :exc:`NotmuchError` or derived exception in case of
127 # no path specified. use a user's default database
128 if Database._std_db_path is None:
129 #the following line throws a NotmuchError if it fails
130 Database._std_db_path = self._get_user_default_db()
131 path = Database._std_db_path
134 self.open(path, mode)
138 def _assert_db_is_initialized(self):
139 """Raises :exc:`NotInitializedError` if self._db is `None`"""
141 raise NotInitializedError()
143 def create(self, path):
144 """Creates a new notmuch database
146 This function is used by __init__() and usually does not need
147 to be called directly. It wraps the underlying
148 *notmuch_database_create* function and creates a new notmuch
149 database at *path*. It will always return a database in :attr:`MODE`
150 .READ_WRITE mode as creating an empty database for
151 reading only does not make a great deal of sense.
153 :param path: A directory in which we should create the database.
156 :exception: :exc:`NotmuchError` in case of any failure
157 (possibly after printing an error message on stderr).
159 if self._db is not None:
160 raise NotmuchError(message="Cannot create db, this Database() "
161 "already has an open one.")
163 res = Database._create(_str(path), Database.MODE.READ_WRITE)
167 message="Could not create the specified database")
170 def open(self, path, mode=0):
171 """Opens an existing database
173 This function is used by __init__() and usually does not need
174 to be called directly. It wraps the underlying
175 *notmuch_database_open* function.
177 :param status: Open the database in read-only or read-write mode
178 :type status: :attr:`MODE`
180 :exception: Raises :exc:`NotmuchError` in case
181 of any failure (possibly after printing an error message on stderr).
183 res = Database._open(_str(path), mode)
186 raise NotmuchError(message="Could not open the specified database")
190 """Returns the file path of an open database"""
191 self._assert_db_is_initialized()
192 return Database._get_path(self._db).decode('utf-8')
194 def get_version(self):
195 """Returns the database format version
197 :returns: The database version as positive integer
199 self._assert_db_is_initialized()
200 return Database._get_version(self._db)
202 _needs_upgrade = nmlib.notmuch_database_needs_upgrade
203 _needs_upgrade.argtypes = [NotmuchDatabaseP]
204 _needs_upgrade.restype = bool
206 def needs_upgrade(self):
207 """Does this database need to be upgraded before writing to it?
209 If this function returns `True` then no functions that modify the
210 database (:meth:`add_message`,
211 :meth:`Message.add_tag`, :meth:`Directory.set_mtime`,
212 etc.) will work unless :meth:`upgrade` is called successfully first.
214 :returns: `True` or `False`
216 self._assert_db_is_initialized()
217 return self._needs_upgrade(self._db)
220 """Upgrades the current database
222 After opening a database in read-write mode, the client should
223 check if an upgrade is needed (notmuch_database_needs_upgrade) and
224 if so, upgrade with this function before making any modifications.
226 NOT IMPLEMENTED: The optional progress_notify callback can be
227 used by the caller to provide progress indication to the
228 user. If non-NULL it will be called periodically with
229 'progress' as a floating-point value in the range of [0.0..1.0]
230 indicating the progress made so far in the upgrade process.
232 :TODO: catch exceptions, document return values and etc...
234 self._assert_db_is_initialized()
235 status = Database._upgrade(self._db, None, None)
236 #TODO: catch exceptions, document return values and etc
239 _begin_atomic = nmlib.notmuch_database_begin_atomic
240 _begin_atomic.argtypes = [NotmuchDatabaseP]
241 _begin_atomic.restype = c_uint
243 def begin_atomic(self):
244 """Begin an atomic database operation
246 Any modifications performed between a successful
247 :meth:`begin_atomic` and a :meth:`end_atomic` will be applied to
248 the database atomically. Note that, unlike a typical database
249 transaction, this only ensures atomicity, not durability;
250 neither begin nor end necessarily flush modifications to disk.
252 :returns: :attr:`STATUS`.SUCCESS or raises
254 :exception: :exc:`NotmuchError`:
255 :attr:`STATUS`.XAPIAN_EXCEPTION
256 Xapian exception occurred; atomic section not entered.
258 *Added in notmuch 0.9*"""
259 self._assert_db_is_initialized()
260 status = self._begin_atomic(self._db)
261 if status != STATUS.SUCCESS:
262 raise NotmuchError(status)
265 _end_atomic = nmlib.notmuch_database_end_atomic
266 _end_atomic.argtypes = [NotmuchDatabaseP]
267 _end_atomic.restype = c_uint
269 def end_atomic(self):
270 """Indicate the end of an atomic database operation
272 See :meth:`begin_atomic` for details.
274 :returns: :attr:`STATUS`.SUCCESS or raises
278 :attr:`STATUS`.XAPIAN_EXCEPTION
279 A Xapian exception occurred; atomic section not
281 :attr:`STATUS`.UNBALANCED_ATOMIC:
282 end_atomic has been called more times than begin_atomic.
284 *Added in notmuch 0.9*"""
285 self._assert_db_is_initialized()
286 status = self._end_atomic(self._db)
287 if status != STATUS.SUCCESS:
288 raise NotmuchError(status)
291 def get_directory(self, path):
292 """Returns a :class:`Directory` of path,
293 (creating it if it does not exist(?))
295 .. warning:: This call needs a writeable database in
296 :attr:`Database.MODE`.READ_WRITE mode. The underlying library will exit the
297 program if this method is used on a read-only database!
299 :param path: An unicode string containing the path relative to the path
300 of database (see :meth:`get_path`), or else should be an absolute path
301 with initial components that match the path of 'database'.
302 :returns: :class:`Directory` or raises an exception.
304 :exc:`NotmuchError` with :attr:`STATUS`.FILE_ERROR
305 If path is not relative database or absolute with initial
306 components same as database.
308 self._assert_db_is_initialized()
309 # sanity checking if path is valid, and make path absolute
310 if path[0] == os.sep:
311 # we got an absolute path
312 if not path.startswith(self.get_path()):
313 # but its initial components are not equal to the db path
314 raise NotmuchError(STATUS.FILE_ERROR,
315 message="Database().get_directory() called "
316 "with a wrong absolute path.")
319 #we got a relative path, make it absolute
320 abs_dirpath = os.path.abspath(os.path.join(self.get_path(), path))
322 dir_p = Database._get_directory(self._db, _str(path))
324 # return the Directory, init it with the absolute path
325 return Directory(_str(abs_dirpath), dir_p, self)
327 _add_message = nmlib.notmuch_database_add_message
328 _add_message.argtypes = [NotmuchDatabaseP, c_char_p, POINTER(NotmuchMessageP)]
329 _add_message.restype = c_uint
331 def add_message(self, filename, sync_maildir_flags=False):
332 """Adds a new message to the database
334 :param filename: should be a path relative to the path of the
335 open database (see :meth:`get_path`), or else should be an
336 absolute filename with initial components that match the
337 path of the database.
339 The file should be a single mail message (not a
340 multi-message mbox) that is expected to remain at its
341 current location, since the notmuch database will reference
342 the filename, and will not copy the entire contents of the
345 :param sync_maildir_flags: If the message contains Maildir
346 flags, we will -depending on the notmuch configuration- sync
347 those tags to initial notmuch tags, if set to `True`. It is
348 `False` by default to remain consistent with the libnotmuch
349 API. You might want to look into the underlying method
350 :meth:`Message.maildir_flags_to_tags`.
352 :returns: On success, we return
354 1) a :class:`Message` object that can be used for things
355 such as adding tags to the just-added message.
356 2) one of the following :attr:`STATUS` values:
358 :attr:`STATUS`.SUCCESS
359 Message successfully added to database.
360 :attr:`STATUS`.DUPLICATE_MESSAGE_ID
361 Message has the same message ID as another message already
362 in the database. The new filename was successfully added
363 to the list of the filenames for the existing message.
365 :rtype: 2-tuple(:class:`Message`, :attr:`STATUS`)
367 :exception: Raises a :exc:`NotmuchError` with the following meaning.
368 If such an exception occurs, nothing was added to the database.
370 :attr:`STATUS`.FILE_ERROR
371 An error occurred trying to open the file, (such as
372 permission denied, or file not found, etc.).
373 :attr:`STATUS`.FILE_NOT_EMAIL
374 The contents of filename don't look like an email
376 :attr:`STATUS`.READ_ONLY_DATABASE
377 Database was opened in read-only mode so no message can
380 self._assert_db_is_initialized()
382 status = self._add_message(self._db, _str(filename), byref(msg_p))
384 if not status in [STATUS.SUCCESS, STATUS.DUPLICATE_MESSAGE_ID]:
385 raise NotmuchError(status)
387 #construct Message() and return
388 msg = Message(msg_p, self)
389 #automatic sync initial tags from Maildir flags
390 if sync_maildir_flags:
391 msg.maildir_flags_to_tags()
394 _remove_message = nmlib.notmuch_database_remove_message
395 _remove_message.argtypes = [NotmuchDatabaseP, c_char_p]
396 _remove_message.restype = c_uint
398 def remove_message(self, filename):
399 """Removes a message (filename) from the given notmuch database
401 Note that only this particular filename association is removed from
402 the database. If the same message (as determined by the message ID)
403 is still available via other filenames, then the message will
404 persist in the database for those filenames. When the last filename
405 is removed for a particular message, the database content for that
406 message will be entirely removed.
408 :returns: A :attr:`STATUS` value with the following meaning:
410 :attr:`STATUS`.SUCCESS
411 The last filename was removed and the message was removed
413 :attr:`STATUS`.DUPLICATE_MESSAGE_ID
414 This filename was removed but the message persists in the
415 database with at least one other filename.
417 :exception: Raises a :exc:`NotmuchError` with the following meaning.
418 If such an exception occurs, nothing was removed from the
421 :attr:`STATUS`.READ_ONLY_DATABASE
422 Database was opened in read-only mode so no message can be
425 self._assert_db_is_initialized()
426 return self._remove_message(self._db, filename)
428 def find_message(self, msgid):
429 """Returns a :class:`Message` as identified by its message ID
431 Wraps the underlying *notmuch_database_find_message* function.
433 :param msgid: The message ID
434 :type msgid: unicode or str
435 :returns: :class:`Message` or `None` if no message is found.
437 :exc:`OutOfMemoryError`
438 If an Out-of-memory occured while constructing the message.
440 In case of a Xapian Exception. These exceptions
441 include "Database modified" situations, e.g. when the
442 notmuch database has been modified by another program
443 in the meantime. In this case, you should close and
444 reopen the database and retry.
445 :exc:`NotInitializedError` if
446 the database was not intitialized.
448 self._assert_db_is_initialized()
450 status = Database._find_message(self._db, _str(msgid), byref(msg_p))
451 if status != STATUS.SUCCESS:
452 raise NotmuchError(status)
453 return msg_p and Message(msg_p, self) or None
455 def find_message_by_filename(self, filename):
456 """Find a message with the given filename
458 .. warning:: This call needs a writeable database in
459 :attr:`Database.MODE`.READ_WRITE mode. The underlying library will
460 exit the program if this method is used on a read-only
463 :returns: If the database contains a message with the given
464 filename, then a class:`Message:` is returned. This
465 function returns None if no message is found with the given
469 :exc:`OutOfMemoryError`
470 If an Out-of-memory occured while constructing the message.
472 In case of a Xapian Exception. These exceptions
473 include "Database modified" situations, e.g. when the
474 notmuch database has been modified by another program
475 in the meantime. In this case, you should close and
476 reopen the database and retry.
477 :exc:`NotInitializedError` if
478 the database was not intitialized.
480 *Added in notmuch 0.9*"""
481 self._assert_db_is_initialized()
483 status = Database._find_message_by_filename(self._db, _str(filename),
485 if status != STATUS.SUCCESS:
486 raise NotmuchError(status)
487 return msg_p and Message(msg_p, self) or None
489 def get_all_tags(self):
490 """Returns :class:`Tags` with a list of all tags found in the database
492 :returns: :class:`Tags`
493 :execption: :exc:`NotmuchError` with :attr:`STATUS`.NULL_POINTER on error
495 self._assert_db_is_initialized()
496 tags_p = Database._get_all_tags(self._db)
498 raise NotmuchError(STATUS.NULL_POINTER)
499 return Tags(tags_p, self)
501 def create_query(self, querystring):
502 """Returns a :class:`Query` derived from this database
504 This is a shorthand method for doing::
507 # Automatically frees the Database() when 'q' is deleted
509 q = Database(dbpath).create_query('from:"Biene Maja"')
511 # long version, which is functionally equivalent but will keep the
512 # Database in the 'db' variable around after we delete 'q':
514 db = Database(dbpath)
515 q = Query(db,'from:"Biene Maja"')
517 This function is a python extension and not in the underlying C API.
519 return Query(self, querystring)
522 return "'Notmuch DB " + self.get_path() + "'"
524 _close = nmlib.notmuch_database_close
525 _close.argtypes = [NotmuchDatabaseP]
526 _close.restype = None
529 """Close and free the notmuch database if needed"""
530 if self._db is not None:
531 self._close(self._db)
533 def _get_user_default_db(self):
534 """ Reads a user's notmuch config and returns his db location
536 Throws a NotmuchError if it cannot find it"""
537 from ConfigParser import SafeConfigParser
538 config = SafeConfigParser()
539 conf_f = os.getenv('NOTMUCH_CONFIG',
540 os.path.expanduser('~/.notmuch-config'))
542 if not config.has_option('database', 'path'):
543 raise NotmuchError(message="No DB path specified"
544 " and no user default found")
545 return config.get('database', 'path').decode('utf-8')
549 """Property returning a pointer to `notmuch_database_t` or `None`
551 This should normally not be needed by a user (and is not yet
552 guaranteed to remain stable in future versions).
558 """Represents a search query on an opened :class:`Database`.
560 A query selects and filters a subset of messages from the notmuch
561 database we derive from.
563 :class:`Query` provides an instance attribute :attr:`sort`, which
564 contains the sort order (if specified via :meth:`set_sort`) or
567 Any function in this class may throw an :exc:`NotInitializedError`
568 in case the underlying query object was not set up correctly.
570 .. note:: Do remember that as soon as we tear down this object,
571 all underlying derived objects such as threads,
572 messages, tags etc will be freed by the underlying library
573 as well. Accessing these objects will lead to segfaults and
574 other unexpected behavior. See above for more details.
577 SORT = Enum(['OLDEST_FIRST', 'NEWEST_FIRST', 'MESSAGE_ID', 'UNSORTED'])
578 """Constants: Sort order in which to return results"""
580 """notmuch_query_create"""
581 _create = nmlib.notmuch_query_create
582 _create.argtypes = [NotmuchDatabaseP, c_char_p]
583 _create.restype = NotmuchQueryP
585 """notmuch_query_search_threads"""
586 _search_threads = nmlib.notmuch_query_search_threads
587 _search_threads.argtypes = [NotmuchQueryP]
588 _search_threads.restype = NotmuchThreadsP
590 """notmuch_query_search_messages"""
591 _search_messages = nmlib.notmuch_query_search_messages
592 _search_messages.argtypes = [NotmuchQueryP]
593 _search_messages.restype = NotmuchMessagesP
595 """notmuch_query_count_messages"""
596 _count_messages = nmlib.notmuch_query_count_messages
597 _count_messages.argtypes = [NotmuchQueryP]
598 _count_messages.restype = c_uint
600 def __init__(self, db, querystr):
602 :param db: An open database which we derive the Query from.
603 :type db: :class:`Database`
604 :param querystr: The query string for the message.
605 :type querystr: utf-8 encoded str or unicode
610 self.create(db, querystr)
612 def _assert_query_is_initialized(self):
613 """Raises :exc:`NotInitializedError` if self._query is `None`"""
614 if self._query is None:
615 raise NotInitializedError()
617 def create(self, db, querystr):
618 """Creates a new query derived from a Database
620 This function is utilized by __init__() and usually does not need to
623 :param db: Database to create the query from.
624 :type db: :class:`Database`
625 :param querystr: The query string
626 :type querystr: utf-8 encoded str or unicode
629 :exc:`NullPointerError` if the query creation failed
630 (e.g. too little memory).
631 :exc:`NotInitializedError` if the underlying db was not
634 db._assert_db_is_initialized()
635 # create reference to parent db to keep it alive
637 # create query, return None if too little mem available
638 query_p = Query._create(db.db_p, _str(querystr))
640 raise NullPointerError
641 self._query = query_p
643 _set_sort = nmlib.notmuch_query_set_sort
644 _set_sort.argtypes = [NotmuchQueryP, c_uint]
645 _set_sort.argtypes = None
647 def set_sort(self, sort):
648 """Set the sort order future results will be delivered in
650 :param sort: Sort order (see :attr:`Query.SORT`)
652 self._assert_query_is_initialized()
654 self._set_sort(self._query, sort)
656 def search_threads(self):
657 """Execute a query for threads
659 Execute a query for threads, returning a :class:`Threads` iterator.
660 The returned threads are owned by the query and as such, will only be
661 valid until the Query is deleted.
663 The method sets :attr:`Message.FLAG`\.MATCH for those messages that
664 match the query. The method :meth:`Message.get_flag` allows us
665 to get the value of this flag.
667 :returns: :class:`Threads`
668 :exception: :exc:`NullPointerError` if search_threads failed
670 self._assert_query_is_initialized()
671 threads_p = Query._search_threads(self._query)
673 if threads_p is None:
674 raise NullPointerError
675 return Threads(threads_p, self)
677 def search_messages(self):
678 """Filter messages according to the query and return
679 :class:`Messages` in the defined sort order
681 :returns: :class:`Messages`
682 :exception: :exc:`NullPointerError` if search_messages failed
684 self._assert_query_is_initialized()
685 msgs_p = Query._search_messages(self._query)
688 raise NullPointerError
689 return Messages(msgs_p, self)
691 def count_messages(self):
692 """Estimate the number of messages matching the query
694 This function performs a search and returns Xapian's best
695 guess as to the number of matching messages. It is much faster
696 than performing :meth:`search_messages` and counting the
697 result with `len()` (although it always returned the same
698 result in my tests). Technically, it wraps the underlying
699 *notmuch_query_count_messages* function.
701 :returns: :class:`Messages`
703 self._assert_query_is_initialized()
704 return Query._count_messages(self._query)
706 _destroy = nmlib.notmuch_query_destroy
707 _destroy.argtypes = [NotmuchQueryP]
708 _destroy.restype = None
711 """Close and free the Query"""
712 if self._query is not None:
713 self._destroy(self._query)
716 class Directory(object):
717 """Represents a directory entry in the notmuch directory
719 Modifying attributes of this object will modify the
720 database, not the real directory attributes.
722 The Directory object is usually derived from another object
723 e.g. via :meth:`Database.get_directory`, and will automatically be
724 become invalid whenever that parent is deleted. You should
725 therefore initialized this object handing it a reference to the
726 parent, preventing the parent from automatically being garbage
730 """notmuch_directory_get_mtime"""
731 _get_mtime = nmlib.notmuch_directory_get_mtime
732 _get_mtime.argtypes = [NotmuchDirectoryP]
733 _get_mtime.restype = c_long
735 """notmuch_directory_set_mtime"""
736 _set_mtime = nmlib.notmuch_directory_set_mtime
737 _set_mtime.argtypes = [NotmuchDirectoryP, c_long]
738 _set_mtime.restype = c_uint
740 """notmuch_directory_get_child_files"""
741 _get_child_files = nmlib.notmuch_directory_get_child_files
742 _get_child_files.argtypes = [NotmuchDirectoryP]
743 _get_child_files.restype = NotmuchFilenamesP
745 """notmuch_directory_get_child_directories"""
746 _get_child_directories = nmlib.notmuch_directory_get_child_directories
747 _get_child_directories.argtypes = [NotmuchDirectoryP]
748 _get_child_directories.restype = NotmuchFilenamesP
750 def _assert_dir_is_initialized(self):
751 """Raises a NotmuchError(:attr:`STATUS`.NOT_INITIALIZED) if dir_p is None"""
752 if self._dir_p is None:
753 raise NotmuchError(STATUS.NOT_INITIALIZED)
755 def __init__(self, path, dir_p, parent):
757 :param path: The absolute path of the directory object as unicode.
758 :param dir_p: The pointer to an internal notmuch_directory_t object.
759 :param parent: The object this Directory is derived from
760 (usually a :class:`Database`). We do not directly use
761 this, but store a reference to it as long as
762 this Directory object lives. This keeps the
765 assert isinstance(path, unicode), "Path needs to be an UNICODE object"
768 self._parent = parent
770 def set_mtime(self, mtime):
771 """Sets the mtime value of this directory in the database
773 The intention is for the caller to use the mtime to allow efficient
774 identification of new messages to be added to the database. The
775 recommended usage is as follows:
777 * Read the mtime of a directory from the filesystem
779 * Call :meth:`Database.add_message` for all mail files in
782 * Call notmuch_directory_set_mtime with the mtime read from the
783 filesystem. Then, when wanting to check for updates to the
784 directory in the future, the client can call :meth:`get_mtime`
785 and know that it only needs to add files if the mtime of the
786 directory and files are newer than the stored timestamp.
788 .. note:: :meth:`get_mtime` function does not allow the caller
789 to distinguish a timestamp of 0 from a non-existent
790 timestamp. So don't store a timestamp of 0 unless you are
791 comfortable with that.
793 :param mtime: A (time_t) timestamp
794 :returns: Nothing on success, raising an exception on failure.
795 :exception: :exc:`NotmuchError`:
797 :attr:`STATUS`.XAPIAN_EXCEPTION
798 A Xapian exception occurred, mtime not stored.
799 :attr:`STATUS`.READ_ONLY_DATABASE
800 Database was opened in read-only mode so directory
801 mtime cannot be modified.
802 :attr:`STATUS`.NOT_INITIALIZED
803 The directory has not been initialized
805 self._assert_dir_is_initialized()
806 #TODO: make sure, we convert the mtime parameter to a 'c_long'
807 status = Directory._set_mtime(self._dir_p, mtime)
810 if status == STATUS.SUCCESS:
812 #fail with Exception otherwise
813 raise NotmuchError(status)
816 """Gets the mtime value of this directory in the database
818 Retrieves a previously stored mtime for this directory.
820 :param mtime: A (time_t) timestamp
821 :returns: Nothing on success, raising an exception on failure.
822 :exception: :exc:`NotmuchError`:
824 :attr:`STATUS`.NOT_INITIALIZED
825 The directory has not been initialized
827 self._assert_dir_is_initialized()
828 return Directory._get_mtime(self._dir_p)
830 # Make mtime attribute a property of Directory()
831 mtime = property(get_mtime, set_mtime, doc="""Property that allows getting
832 and setting of the Directory *mtime* (read-write)
834 See :meth:`get_mtime` and :meth:`set_mtime` for usage and
835 possible exceptions.""")
837 def get_child_files(self):
838 """Gets a Filenames iterator listing all the filenames of
839 messages in the database within the given directory.
841 The returned filenames will be the basename-entries only (not
844 self._assert_dir_is_initialized()
845 files_p = Directory._get_child_files(self._dir_p)
846 return Filenames(files_p, self)
848 def get_child_directories(self):
849 """Gets a :class:`Filenames` iterator listing all the filenames of
850 sub-directories in the database within the given directory
852 The returned filenames will be the basename-entries only (not
855 self._assert_dir_is_initialized()
856 files_p = Directory._get_child_directories(self._dir_p)
857 return Filenames(files_p, self)
861 """Returns the absolute path of this Directory (read-only)"""
865 """Object representation"""
866 return "<notmuch Directory object '%s'>" % self._path
868 _destroy = nmlib.notmuch_directory_destroy
869 _destroy.argtypes = [NotmuchDirectoryP]
870 _destroy.argtypes = None
873 """Close and free the Directory"""
874 if self._dir_p is not None:
875 self._destroy(self._dir_p)
878 class Filenames(object):
879 """An iterator over File- or Directory names stored in the database"""
881 #notmuch_filenames_get
882 _get = nmlib.notmuch_filenames_get
883 _get.argtypes = [NotmuchFilenamesP]
884 _get.restype = c_char_p
886 def __init__(self, files_p, parent):
888 :param files_p: The pointer to an internal notmuch_filenames_t object.
889 :param parent: The object this Directory is derived from
890 (usually a Directory()). We do not directly use
891 this, but store a reference to it as long as
892 this Directory object lives. This keeps the
895 self._files_p = files_p
896 self._parent = parent
899 """ Make Filenames an iterator """
902 _valid = nmlib.notmuch_filenames_valid
903 _valid.argtypes = [NotmuchFilenamesP]
904 _valid.restype = bool
906 _move_to_next = nmlib.notmuch_filenames_move_to_next
907 _move_to_next.argtypes = [NotmuchFilenamesP]
908 _move_to_next.restype = None
911 if self._files_p is None:
912 raise NotmuchError(STATUS.NOT_INITIALIZED)
914 if not self._valid(self._files_p):
918 file = Filenames._get(self._files_p)
919 self._move_to_next(self._files_p)
923 """len(:class:`Filenames`) returns the number of contained files
925 .. note:: As this iterates over the files, we will not be able to
926 iterate over them again! So this will fail::
929 files = Database().get_directory('').get_child_files()
930 if len(files) > 0: #this 'exhausts' msgs
931 # next line raises NotmuchError(:attr:`STATUS`.NOT_INITIALIZED)!!!
932 for file in files: print file
934 if self._files_p is None:
935 raise NotmuchError(STATUS.NOT_INITIALIZED)
938 while self._valid(self._files_p):
939 self._move_to_next(self._files_p)
944 _destroy = nmlib.notmuch_filenames_destroy
945 _destroy.argtypes = [NotmuchFilenamesP]
946 _destroy.restype = None
949 """Close and free Filenames"""
950 if self._files_p is not None:
951 self._destroy(self._files_p)