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"""
This file is part of notmuch.
Notmuch is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
Notmuch is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with notmuch. If not, see <http://www.gnu.org/licenses/>.
Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>
"""
from ctypes import c_uint, c_long
from .globals import (
nmlib,
NotmuchDirectoryP,
NotmuchFilenamesP
)
from .errors import (
STATUS,
NotmuchError,
NotInitializedError,
)
from .filenames import Filenames
class Directory(object):
"""Represents a directory entry in the notmuch directory
Modifying attributes of this object will modify the
database, not the real directory attributes.
The Directory object is usually derived from another object
e.g. via :meth:`Database.get_directory`, and will automatically be
become invalid whenever that parent is deleted. You should
therefore initialized this object handing it a reference to the
parent, preventing the parent from automatically being garbage
collected.
"""
"""notmuch_directory_get_mtime"""
_get_mtime = nmlib.notmuch_directory_get_mtime
_get_mtime.argtypes = [NotmuchDirectoryP]
_get_mtime.restype = c_long
"""notmuch_directory_set_mtime"""
_set_mtime = nmlib.notmuch_directory_set_mtime
_set_mtime.argtypes = [NotmuchDirectoryP, c_long]
_set_mtime.restype = c_uint
"""notmuch_directory_get_child_files"""
_get_child_files = nmlib.notmuch_directory_get_child_files
_get_child_files.argtypes = [NotmuchDirectoryP]
_get_child_files.restype = NotmuchFilenamesP
"""notmuch_directory_get_child_directories"""
_get_child_directories = nmlib.notmuch_directory_get_child_directories
_get_child_directories.argtypes = [NotmuchDirectoryP]
_get_child_directories.restype = NotmuchFilenamesP
def _assert_dir_is_initialized(self):
"""Raises a NotmuchError(:attr:`STATUS`.NOT_INITIALIZED)
if dir_p is None"""
if not self._dir_p:
raise NotInitializedError()
def __init__(self, path, dir_p, parent):
"""
:param path: The absolute path of the directory object.
:param dir_p: The pointer to an internal notmuch_directory_t object.
:param parent: The object this Directory is derived from
(usually a :class:`Database`). We do not directly use
this, but store a reference to it as long as
this Directory object lives. This keeps the
parent object alive.
"""
self._path = path
self._dir_p = dir_p
self._parent = parent
def set_mtime(self, mtime):
"""Sets the mtime value of this directory in the database
The intention is for the caller to use the mtime to allow efficient
identification of new messages to be added to the database. The
recommended usage is as follows:
* Read the mtime of a directory from the filesystem
* Call :meth:`Database.add_message` for all mail files in
the directory
* Call notmuch_directory_set_mtime with the mtime read from the
filesystem. Then, when wanting to check for updates to the
directory in the future, the client can call :meth:`get_mtime`
and know that it only needs to add files if the mtime of the
directory and files are newer than the stored timestamp.
.. note::
:meth:`get_mtime` function does not allow the caller to
distinguish a timestamp of 0 from a non-existent timestamp. So
don't store a timestamp of 0 unless you are comfortable with
that.
:param mtime: A (time_t) timestamp
:raises: :exc:`XapianError` a Xapian exception occurred, mtime
not stored
:raises: :exc:`ReadOnlyDatabaseError` the database was opened
in read-only mode so directory mtime cannot be modified
:raises: :exc:`NotInitializedError` the directory object has not
been initialized
"""
self._assert_dir_is_initialized()
status = Directory._set_mtime(self._dir_p, mtime)
if status != STATUS.SUCCESS:
raise NotmuchError(status)
def get_mtime(self):
"""Gets the mtime value of this directory in the database
Retrieves a previously stored mtime for this directory.
:param mtime: A (time_t) timestamp
:raises: :exc:`NotmuchError`:
:attr:`STATUS`.NOT_INITIALIZED
The directory has not been initialized
"""
self._assert_dir_is_initialized()
return Directory._get_mtime(self._dir_p)
# Make mtime attribute a property of Directory()
mtime = property(get_mtime, set_mtime, doc="""Property that allows getting
and setting of the Directory *mtime* (read-write)
See :meth:`get_mtime` and :meth:`set_mtime` for usage and
possible exceptions.""")
def get_child_files(self):
"""Gets a Filenames iterator listing all the filenames of
messages in the database within the given directory.
The returned filenames will be the basename-entries only (not
complete paths.
"""
self._assert_dir_is_initialized()
files_p = Directory._get_child_files(self._dir_p)
return Filenames(files_p, self)
def get_child_directories(self):
"""Gets a :class:`Filenames` iterator listing all the filenames of
sub-directories in the database within the given directory
The returned filenames will be the basename-entries only (not
complete paths.
"""
self._assert_dir_is_initialized()
files_p = Directory._get_child_directories(self._dir_p)
return Filenames(files_p, self)
@property
def path(self):
"""Returns the absolute path of this Directory (read-only)"""
return self._path
def __repr__(self):
"""Object representation"""
return "<notmuch Directory object '%s'>" % self._path
_destroy = nmlib.notmuch_directory_destroy
_destroy.argtypes = [NotmuchDirectoryP]
_destroy.restype = None
def __del__(self):
"""Close and free the Directory"""
if self._dir_p:
self._destroy(self._dir_p)
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