X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=cnotmuch%2Fdatabase.py;h=44fd31548f7583801827ac9470211332c83f2848;hp=0ae24ec245b53f8bbbb191739f6271e806fb6b95;hb=7390c869c71cd7d65a99b3dacb17ca659aa09c8b;hpb=b42fdb0f70c23d72b0c7e91c6e09f48192a8206c diff --git a/cnotmuch/database.py b/cnotmuch/database.py index 0ae24ec2..44fd3154 100644 --- a/cnotmuch/database.py +++ b/cnotmuch/database.py @@ -1,8 +1,9 @@ -import ctypes, os -from ctypes import c_int, c_char_p, c_void_p, c_uint, c_uint64, c_bool +import os +from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref from cnotmuch.globals import nmlib, STATUS, NotmuchError, Enum -import logging -from datetime import date +from cnotmuch.thread import Threads +from cnotmuch.message import Messages +from cnotmuch.tag import Tags class Database(object): """Represents a notmuch database (wraps notmuch_database_t) @@ -19,7 +20,11 @@ class Database(object): MODE = Enum(['READ_ONLY','READ_WRITE']) """Constants: Mode in which to open the database""" - """notmuch_database_get_path (notmuch_database_t *database)""" + """notmuch_database_get_directory""" + _get_directory = nmlib.notmuch_database_get_directory + _get_directory.restype = c_void_p + + """notmuch_database_get_path""" _get_path = nmlib.notmuch_database_get_path _get_path.restype = c_char_p @@ -27,24 +32,28 @@ class Database(object): _get_version = nmlib.notmuch_database_get_version _get_version.restype = c_uint - """notmuch_database_open (const char *path, notmuch_database_mode_t mode)""" + """notmuch_database_open""" _open = nmlib.notmuch_database_open _open.restype = c_void_p - """ notmuch_database_find_message """ + """notmuch_database_upgrade""" + _upgrade = nmlib.notmuch_database_upgrade + _upgrade.argtypes = [c_void_p, c_void_p, c_void_p] + + """ notmuch_database_find_message""" _find_message = nmlib.notmuch_database_find_message _find_message.restype = c_void_p - """notmuch_database_get_all_tags (notmuch_database_t *database)""" + """notmuch_database_get_all_tags""" _get_all_tags = nmlib.notmuch_database_get_all_tags _get_all_tags.restype = c_void_p - """ notmuch_database_create(const char *path):""" + """notmuch_database_create""" _create = nmlib.notmuch_database_create _create.restype = c_void_p def __init__(self, path=None, create=False, mode= 0): - """If *path* is *None*, we will try to read a users notmuch + """If *path* is `None`, we will try to read a users notmuch configuration and use his configured database. The location of the configuration file can be specified through the environment variable *NOTMUCH_CONFIG*, falling back to the default `~/.notmuch-config`. @@ -77,14 +86,19 @@ class Database(object): else: self.create(path) + def _verify_initialized_db(self): + """Raises a NotmuchError in case self._db is still None""" + if self._db is None: + raise NotmuchError(STATUS.NOT_INITIALIZED) + def create(self, path): """Creates a new notmuch database This function is used by __init__() and usually does not need to be called directly. It wraps the underlying *notmuch_database_create* function and creates a new notmuch - database at *path*. It will always return a database in - :attr:`MODE`.READ_WRITE mode as creating an empty database for + database at *path*. It will always return a database in :attr:`MODE` + .READ_WRITE mode as creating an empty database for reading only does not make a great deal of sense. :param path: A directory in which we should create the database. @@ -128,7 +142,10 @@ class Database(object): def get_path(self): """Returns the file path of an open database - Wraps notmuch_database_get_path""" + Wraps *notmuch_database_get_path*.""" + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + return Database._get_path(self._db) def get_version(self): @@ -138,27 +155,182 @@ class Database(object): :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if the database was not intitialized. """ - if self._db is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + # Raise a NotmuchError if not initialized + self._verify_initialized_db() return Database._get_version (self._db) def needs_upgrade(self): """Does this database need to be upgraded before writing to it? - If this function returns True then no functions that modify the - database (:meth:`add_message`, :meth:`add_tag`, - :meth:`Directory.set_mtime`, etc.) will work unless :meth:`upgrade` - is called successfully first. + If this function returns `True` then no functions that modify the + database (:meth:`add_message`, + :meth:`Message.add_tag`, :meth:`Directory.set_mtime`, + etc.) will work unless :meth:`upgrade` is called successfully first. :returns: `True` or `False` :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if the database was not intitialized. """ - if self._db is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + return notmuch_database_needs_upgrade(self._db) + + def upgrade(self): + """Upgrades the current database + + After opening a database in read-write mode, the client should + check if an upgrade is needed (notmuch_database_needs_upgrade) and + if so, upgrade with this function before making any modifications. + + NOT IMPLEMENTED: The optional progress_notify callback can be + used by the caller to provide progress indication to the + user. If non-NULL it will be called periodically with + 'progress' as a floating-point value in the range of [0.0..1.0] + indicating the progress made so far in the upgrade process. + + :TODO: catch exceptions, document return values and etc... + """ + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + status = Database._upgrade (self._db, None, None) + #TODO: catch exceptions, document return values and etc + return status + + def get_directory(self, path): + """Returns a :class:`Directory` of path, + (creating it if it does not exist(?)) + + .. warning:: This call needs a writeable database in + Database.MODE.READ_WRITE mode. The underlying library will exit the + program if this method is used on a read-only database! + + :param path: A str containing the path relative to the path of database + (see :meth:`get_path`), or else should be an absolute path + with initial components that match the path of 'database'. + :returns: :class:`Directory` or raises an exception. + :exception: :exc:`NotmuchError` + + STATUS.NOT_INITIALIZED + If the database was not intitialized. + + STATUS.FILE_ERROR + If path is not relative database or absolute with initial + components same as database. + + """ + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + # sanity checking if path is valid, and make path absolute + if path[0] == os.sep: + # we got an absolute path + if not path.startswith(self.get_path()): + # but its initial components are not equal to the db path + raise NotmuchError(STATUS.FILE_ERROR, + message="Database().get_directory() called with a wrong absolute path.") + abs_dirpath = path + else: + #we got a relative path, make it absolute + abs_dirpath = os.path.abspath(os.path.join(self.get_path(),path)) + + dir_p = Database._get_directory(self._db, path); + + # return the Directory, init it with the absolute path + return Directory(abs_dirpath, dir_p, self) + + def add_message(self, filename): + """Adds a new message to the database + + `filename` should be a path relative to the path of the open + database (see :meth:`get_path`), or else should be an absolute + filename with initial components that match the path of the + database. + + The file should be a single mail message (not a multi-message mbox) + that is expected to remain at its current location, since the + notmuch database will reference the filename, and will not copy the + entire contents of the file. + + :returns: On success, we return + + 1) a :class:`Message` object that can be used for things + such as adding tags to the just-added message. + 2) one of the following STATUS values: + + STATUS.SUCCESS + Message successfully added to database. + STATUS.DUPLICATE_MESSAGE_ID + Message has the same message ID as another message already + in the database. The new filename was successfully added + to the message in the database. + + :rtype: 2-tuple(:class:`Message`, STATUS) + + :exception: Raises a :exc:`NotmuchError` with the following meaning. + If such an exception occurs, nothing was added to the database. + + STATUS.FILE_ERROR + An error occurred trying to open the file, (such as + permission denied, or file not found, etc.). + STATUS.FILE_NOT_EMAIL + The contents of filename don't look like an email message. + STATUS.READ_ONLY_DATABASE + Database was opened in read-only mode so no message can + be added. + STATUS.NOT_INITIALIZED + The database has not been initialized. + """ + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + msg_p = c_void_p() + status = nmlib.notmuch_database_add_message(self._db, + filename, + byref(msg_p)) + + if not status in [STATUS.SUCCESS,STATUS.DUPLICATE_MESSAGE_ID]: + raise NotmuchError(status) - return notmuch_database_needs_upgrade(self.db) + #construct Message() and return + msg = Message(msg_p, self) + return (msg, status) + + def remove_message(self, filename): + """Removes a message from the given notmuch database + + Note that only this particular filename association is removed from + the database. If the same message (as determined by the message ID) + is still available via other filenames, then the message will + persist in the database for those filenames. When the last filename + is removed for a particular message, the database content for that + message will be entirely removed. + + :returns: A STATUS value with the following meaning: + + STATUS.SUCCESS + The last filename was removed and the message was removed + from the database. + STATUS.DUPLICATE_MESSAGE_ID + This filename was removed but the message persists in the + database with at least one other filename. + + :exception: Raises a :exc:`NotmuchError` with the following meaning. + If such an exception occurs, nothing was removed from the database. + + STATUS.READ_ONLY_DATABASE + Database was opened in read-only mode so no message can be + removed. + STATUS.NOT_INITIALIZED + The database has not been initialized. + """ + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + status = nmlib.notmuch_database_remove_message(self._db, + filename) def find_message(self, msgid): """Returns a :class:`Message` as identified by its message ID @@ -172,8 +344,9 @@ class Database(object): :exception: :exc:`NotmuchError` with STATUS.NOT_INITIALIZED if the database was not intitialized. """ - if self._db is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + msg_p = Database._find_message(self._db, msgid) if msg_p is None: return None @@ -185,21 +358,43 @@ class Database(object): :returns: :class:`Tags` :execption: :exc:`NotmuchError` with STATUS.NULL_POINTER on error """ - if self._db is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + # Raise a NotmuchError if not initialized + self._verify_initialized_db() tags_p = Database._get_all_tags (self._db) if tags_p == None: raise NotmuchError(STATUS.NULL_POINTER) return Tags(tags_p, self) + def create_query(self, querystring): + """Returns a :class:`Query` derived from this database + + This is a shorthand method for doing:: + + # short version + # Automatically frees the Database() when 'q' is deleted + + q = Database(dbpath).create_query('from:"Biene Maja"') + + # long version, which is functionally equivalent but will keep the + # Database in the 'db' variable around after we delete 'q': + + db = Database(dbpath) + q = Query(db,'from:"Biene Maja"') + + This function is a python extension and not in the underlying C API. + """ + # Raise a NotmuchError if not initialized + self._verify_initialized_db() + + return Query(self, querystring) + def __repr__(self): return "'Notmuch DB " + self.get_path() + "'" def __del__(self): """Close and free the notmuch database if needed""" if self._db is not None: - logging.debug("Freeing the database now") nmlib.notmuch_database_close(self._db) def _get_user_default_db(self): @@ -218,18 +413,24 @@ class Database(object): @property def db_p(self): - """Property returning a pointer to the notmuch_database_t or `None` + """Property returning a pointer to `notmuch_database_t` or `None` - This should normally not be needed by a user.""" + This should normally not be needed by a user (and is not yet + guaranteed to remain stable in future versions). + """ return self._db #------------------------------------------------------------------------------ class Query(object): - """ Represents a search query on an opened :class:`Database`. + """Represents a search query on an opened :class:`Database`. A query selects and filters a subset of messages from the notmuch database we derive from. + Query() provides an instance attribute :attr:`sort`, which + contains the sort order (if specified via :meth:`set_sort`) or + `None`. + Technically, it wraps the underlying *notmuch_query_t* struct. .. note:: Do remember that as soon as we tear down this object, @@ -246,6 +447,10 @@ class Query(object): _create = nmlib.notmuch_query_create _create.restype = c_void_p + """notmuch_query_search_threads""" + _search_threads = nmlib.notmuch_query_search_threads + _search_threads.restype = c_void_p + """notmuch_query_search_messages""" _search_messages = nmlib.notmuch_query_search_messages _search_messages.restype = c_void_p @@ -264,10 +469,11 @@ class Query(object): """ self._db = None self._query = None + self.sort = None self.create(db, querystr) def create(self, db, querystr): - """Creates a new query derived from a Database. + """Creates a new query derived from a Database This function is utilized by __init__() and usually does not need to be called directly. @@ -307,8 +513,39 @@ class Query(object): if self._query is None: raise NotmuchError(STATUS.NOT_INITIALIZED) + self.sort = sort nmlib.notmuch_query_set_sort(self._query, sort) + def search_threads(self): + """Execute a query for threads + + Execute a query for threads, returning a :class:`Threads` iterator. + The returned threads are owned by the query and as such, will only be + valid until the Query is deleted. + + The method sets :attr:`Message.FLAG`\.MATCH for those messages that + match the query. The method :meth:`Message.get_flag` allows us + to get the value of this flag. + + Technically, it wraps the underlying + *notmuch_query_search_threads* function. + + :returns: :class:`Threads` + :exception: :exc:`NotmuchError` + + * STATUS.NOT_INITIALIZED if query is not inited + * STATUS.NULL_POINTER if search_threads failed + """ + if self._query is None: + raise NotmuchError(STATUS.NOT_INITIALIZED) + + threads_p = Query._search_threads(self._query) + + if threads_p is None: + NotmuchError(STATUS.NULL_POINTER) + + return Threads(threads_p,self) + def search_messages(self): """Filter messages according to the query and return :class:`Messages` in the defined sort order @@ -355,605 +592,231 @@ class Query(object): def __del__(self): """Close and free the Query""" if self._query is not None: - logging.debug("Freeing the Query now") nmlib.notmuch_query_destroy (self._query) -#------------------------------------------------------------------------------ -class Tags(object): - """Represents a list of notmuch tags - - This object provides an iterator over a list of notmuch tags. Do - note that the underlying library only provides a one-time iterator - (it cannot reset the iterator to the start). Thus iterating over - the function will "exhaust" the list of tags, and a subsequent - iteration attempt will raise a :exc:`NotmuchError` - STATUS.NOT_INITIALIZED. Also note, that any function that uses - iteration (nearly all) will also exhaust the tags. So both:: - for tag in tags: print tag +#------------------------------------------------------------------------------ +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. + """ - as well as:: + """notmuch_directory_get_mtime""" + _get_mtime = nmlib.notmuch_directory_get_mtime + _get_mtime.restype = c_long - number_of_tags = len(tags) + """notmuch_directory_set_mtime""" + _set_mtime = nmlib.notmuch_directory_set_mtime + _set_mtime.argtypes = [c_char_p, c_long] - and even a simple:: + """notmuch_directory_get_child_files""" + _get_child_files = nmlib.notmuch_directory_get_child_files + _get_child_files.restype = c_void_p - #str() iterates over all tags to construct a space separated list - print(str(tags)) + """notmuch_directory_get_child_directories""" + _get_child_directories = nmlib.notmuch_directory_get_child_directories + _get_child_directories.restype = c_void_p - will "exhaust" the Tags. If you need to re-iterate over a list of - tags you will need to retrieve a new :class:`Tags` object. - """ - - #notmuch_tags_get - _get = nmlib.notmuch_tags_get - _get.restype = c_char_p + def _verify_dir_initialized(self): + """Raises a NotmuchError(STATUS.NOT_INITIALIZED) if the dir_p is None""" + if self._dir_p is None: + raise NotmuchError(STATUS.NOT_INITIALIZED) - def __init__(self, tags_p, parent=None): + def __init__(self, path, dir_p, parent): """ - :param tags_p: A pointer to an underlying *notmuch_tags_t* - structure. These are not publically exposed, so a user - will almost never instantiate a :class:`Tags` object - herself. They are usually handed back as a result, - e.g. in :meth:`Database.get_all_tags`. *tags_p* must be - valid, we will raise an :exc:`NotmuchError` - (STATUS.NULL_POINTER) if it is `None`. - :type tags_p: :class:`ctypes.c_void_p` - :param parent: The parent object (ie :class:`Database` or - :class:`Message` these tags are derived from, and saves a - reference to it, so we can automatically delete the db object - once all derived objects are dead. - :TODO: Make the iterator optionally work more than once by - cache the tags in the Python object(?) + :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. """ - if tags_p is None: - NotmuchError(STATUS.NULL_POINTER) - - self._tags = tags_p - #save reference to parent object so we keep it alive + self._path = path + self._dir_p = dir_p self._parent = parent - logging.debug("Inited Tags derived from %s" %(repr(parent))) - - def __iter__(self): - """ Make Tags an iterator """ - return self - - def next(self): - if self._tags is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - if not nmlib.notmuch_tags_valid(self._tags): - self._tags = None - raise StopIteration - - tag = Tags._get (self._tags) - nmlib.notmuch_tags_move_to_next(self._tags) - return tag - - def __len__(self): - """len(:class:`Tags`) returns the number of contained tags - - .. note:: As this iterates over the tags, we will not be able - to iterate over them again (as in retrieve them)! If - the tags have been exhausted already, this will raise a - :exc:`NotmuchError` STATUS.NOT_INITIALIZED on - subsequent attempts. - """ - if self._tags is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - i=0 - while nmlib.notmuch_tags_valid(self._msgs): - nmlib.notmuch_tags_move_to_next(self._msgs) - i += 1 - self._tags = None - return i - - def __str__(self): - """The str() representation of Tags() is a space separated list of tags + def set_mtime (self, mtime): + """Sets the mtime value of this directory in the database - .. note:: As this iterates over the tags, we will not be able - to iterate over them again (as in retrieve them)! If - the tags have been exhausted already, this will raise a - :exc:`NotmuchError` STATUS.NOT_INITIALIZED on - subsequent attempts. - """ - return " ".join(self) - - def __del__(self): - """Close and free the notmuch tags""" - if self._tags is not None: - logging.debug("Freeing the Tags now") - nmlib.notmuch_tags_destroy (self._tags) + 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 + :returns: Nothing on success, raising an exception on failure. + :exception: :exc:`NotmuchError`: + + STATUS.XAPIAN_EXCEPTION + A Xapian exception occurred, mtime not stored. + STATUS.READ_ONLY_DATABASE + Database was opened in read-only mode so directory + mtime cannot be modified. + STATUS.NOT_INITIALIZED + The directory has not been initialized + """ + #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if the dir_p is None + self._verify_dir_initialized() + + #TODO: make sure, we convert the mtime parameter to a 'c_long' + status = Directory._set_mtime(self._dir_p, mtime) + + #return on success + if status == STATUS.SUCCESS: + return + #fail with Exception otherwise + raise NotmuchError(status) -#------------------------------------------------------------------------------ -class Messages(object): - """Represents a list of notmuch messages - - This object provides an iterator over a list of notmuch messages - (Technically, it provides a wrapper for the underlying - *notmuch_messages_t* structure). Do note that the underlying - library only provides a one-time iterator (it cannot reset the - iterator to the start). Thus iterating over the function will - "exhaust" the list of messages, and a subsequent iteration attempt - will raise a :exc:`NotmuchError` STATUS.NOT_INITIALIZED. Also - note, that any function that uses iteration will also - exhaust the messages. So both:: - - for msg in msgs: print msg - - as well as:: - - number_of_msgs = len(msgs) - - will "exhaust" the Messages. If you need to re-iterate over a list of - messages you will need to retrieve a new :class:`Messages` object. - - Things are not as bad as it seems though, you can store and reuse - the single Message objects as often as you want as long as you - keep the parent Messages object around. (Recall that due to - hierarchical memory allocation, all derived Message objects will - be invalid when we delete the parent Messages() object, even if it - was already "exhausted".) So this works:: - - db = Database() - msgs = Query(db,'').search_messages() #get a Messages() object - msglist = [] - for m in msgs: - msglist.append(m) - - # msgs is "exhausted" now and even len(msgs) will raise an exception. - # However it will be kept around until all retrieved Message() objects are - # also deleted. If you did e.g. an explicit del(msgs) here, the - # following lines would fail. - - # You can reiterate over *msglist* however as often as you want. - # It is simply a list with Message objects. - - print (msglist[0].get_filename()) - print (msglist[1].get_filename()) - print (msglist[0].get_message_id()) - """ + def get_mtime (self): + """Gets the mtime value of this directory in the database - #notmuch_tags_get - _get = nmlib.notmuch_messages_get - _get.restype = c_void_p + Retrieves a previously stored mtime for this directory. - _collect_tags = nmlib.notmuch_messages_collect_tags - _collect_tags.restype = c_void_p + :param mtime: A (time_t) timestamp + :returns: Nothing on success, raising an exception on failure. + :exception: :exc:`NotmuchError`: - def __init__(self, msgs_p, parent=None): + STATUS.NOT_INITIALIZED + The directory has not been initialized """ - :param msgs_p: A pointer to an underlying *notmuch_messages_t* - structure. These are not publically exposed, so a user - will almost never instantiate a :class:`Messages` object - herself. They are usually handed back as a result, - e.g. in :meth:`Query.search_messages`. *msgs_p* must be - valid, we will raise an :exc:`NotmuchError` - (STATUS.NULL_POINTER) if it is `None`. - :type msgs_p: :class:`ctypes.c_void_p` - :param parent: The parent object - (ie :class:`Query`) these tags are derived from. It saves - a reference to it, so we can automatically delete the db - object once all derived objects are dead. - :TODO: Make the iterator work more than once and cache the tags in - the Python object.(?) - """ - if msgs_p is None: - NotmuchError(STATUS.NULL_POINTER) + #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self.dir_p is None + self._verify_dir_initialized() - self._msgs = msgs_p - #store parent, so we keep them alive as long as self is alive - self._parent = parent - logging.debug("Inited Messages derived from %s" %(str(parent))) + return Directory._get_mtime (self._dir_p) - def collect_tags(self): - """Return the unique :class:`Tags` in the contained messages + # 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) - :returns: :class:`Tags` - :exceptions: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if not inited + See :meth:`get_mtime` and :meth:`set_mtime` for usage and + possible exceptions.""") - .. note:: :meth:`collect_tags` will iterate over the messages and - therefore will not allow further iterations. + 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. """ - if self._msgs is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self._dir_p is None + self._verify_dir_initialized() - # collect all tags (returns NULL on error) - tags_p = Messages._collect_tags (self._msgs) - #reset _msgs as we iterated over it and can do so only once - self._msgs = None + files_p = Directory._get_child_files(self._dir_p) + return Filenames(files_p, self) - if tags_p == None: - raise NotmuchError(STATUS.NULL_POINTER) - return Tags(tags_p, self) - - def __iter__(self): - """ Make Messages an iterator """ - return self - - def next(self): - if self._msgs is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - if not nmlib.notmuch_messages_valid(self._msgs): - self._msgs = None - raise StopIteration - - msg = Message(Messages._get (self._msgs), self) - nmlib.notmuch_messages_move_to_next(self._msgs) - return msg - - def __len__(self): - """len(:class:`Messages`) returns the number of contained messages - - .. note:: As this iterates over the messages, we will not be able to - iterate over them again (as in retrieve them)! + 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. """ - if self._msgs is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) + #Raise a NotmuchError(STATUS.NOT_INITIALIZED) if self._dir_p is None + self._verify_dir_initialized() - i=0 - while nmlib.notmuch_messages_valid(self._msgs): - nmlib.notmuch_messages_move_to_next(self._msgs) - i += 1 - self._msgs = None - return i + 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 "" % self._path def __del__(self): - """Close and free the notmuch Messages""" - if self._msgs is not None: - logging.debug("Freeing the Messages now") - nmlib.notmuch_messages_destroy (self._msgs) - + """Close and free the Directory""" + if self._dir_p is not None: + nmlib.notmuch_directory_destroy(self._dir_p) #------------------------------------------------------------------------------ -class Message(object): - """Represents a single Email message - - Technically, this wraps the underlying *notmuch_message_t* structure. +class Filenames(object): + """An iterator over File- or Directory names that are stored in the database """ - """notmuch_message_get_filename (notmuch_message_t *message)""" - _get_filename = nmlib.notmuch_message_get_filename - _get_filename.restype = c_char_p - - """notmuch_message_get_message_id (notmuch_message_t *message)""" - _get_message_id = nmlib.notmuch_message_get_message_id - _get_message_id.restype = c_char_p - - """notmuch_message_get_thread_id""" - _get_thread_id = nmlib.notmuch_message_get_thread_id - _get_thread_id.restype = c_char_p - - """notmuch_message_get_tags (notmuch_message_t *message)""" - _get_tags = nmlib.notmuch_message_get_tags - _get_tags.restype = c_void_p - - _get_date = nmlib.notmuch_message_get_date - _get_date.restype = c_uint64 - - _get_header = nmlib.notmuch_message_get_header - _get_header.restype = c_char_p + #notmuch_filenames_get + _get = nmlib.notmuch_filenames_get + _get.restype = c_char_p - def __init__(self, msg_p, parent=None): + def __init__(self, files_p, parent): """ - :param msg_p: A pointer to an internal notmuch_message_t - Structure. If it is `None`, we will raise an :exc:`NotmuchError` - STATUS.NULL_POINTER. - :param parent: A 'parent' object is passed which this message is - derived from. We save a reference to it, so we can - automatically delete the parent object once all derived - objects are dead. + :param files_p: The pointer to an internal notmuch_filenames_t object. + :param parent: The object this Directory is derived from + (usually a Directory()). 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. """ - if msg_p is None: - NotmuchError(STATUS.NULL_POINTER) - self._msg = msg_p - #keep reference to parent, so we keep it alive + self._files_p = files_p self._parent = parent - logging.debug("Inited Message derived from %s" %(str(parent))) - - - def get_message_id(self): - """Returns the message ID - - :returns: String with a message ID - :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if the message - is not initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - return Message._get_message_id(self._msg) - - def get_thread_id(self): - """Returns the thread ID - - The returned string belongs to 'message' will only be valid for as - long as the message is valid. - - This function will not return None since Notmuch ensures that every - message belongs to a single thread. - - :returns: String with a thread ID - :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if the message - is not initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - return Message._get_thread_id (self._msg); - - def get_date(self): - """Returns time_t of the message date - - For the original textual representation of the Date header from the - message call notmuch_message_get_header() with a header value of - "date". - - :returns: a time_t timestamp - :rtype: c_unit64 - :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if the message - is not initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - return Message._get_date(self._msg) - - def get_header(self, header): - """Returns a message header - - This returns any message header that is stored in the notmuch database. - This is only a selected subset of headers, which is currently: - - TODO: add stored headers - - :param header: The name of the header to be retrieved. - It is not case-sensitive (TODO: confirm). - :type header: str - :returns: The header value as string - :exception: :exc:`NotmuchError` - - * STATUS.NOT_INITIALIZED if the message - is not initialized. - * STATUS.NULL_POINTER, if no header was found - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - #Returns NULL if any error occurs. - header = Message._get_header (self._msg, header) - if header == None: - raise NotmuchError(STATUS.NULL_POINTER) - return header - def get_filename(self): - """Return the file path of the message file - - :returns: Absolute file path & name of the message file - :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if the message - is not initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - return Message._get_filename(self._msg) - - def get_tags(self): - """ Return the message tags - - :returns: Message tags - :rtype: :class:`Tags` - :exception: :exc:`NotmuchError` - - * STATUS.NOT_INITIALIZED if the message - is not initialized. - * STATUS.NULL_POINTER, on error - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - tags_p = Message._get_tags(self._msg) - if tags_p == None: - raise NotmuchError(STATUS.NULL_POINTER) - return Tags(tags_p, self) - - def add_tag(self, tag): - """Add a tag to the given message - - Adds a tag to the current message. The maximal tag length is defined in - the notmuch library and is currently 200 bytes. - - :param tag: String with a 'tag' to be added. - :returns: STATUS.SUCCESS if the tag was successfully added. - Raises an exception otherwise. - :exception: :exc:`NotmuchError`. They have the following meaning: - - STATUS.NULL_POINTER - The 'tag' argument is NULL - STATUS.TAG_TOO_LONG - The length of 'tag' is too long - (exceeds Message.NOTMUCH_TAG_MAX) - STATUS.READ_ONLY_DATABASE - Database was opened in read-only mode so message cannot be - modified. - STATUS.NOT_INITIALIZED - The message has not been initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - status = nmlib.notmuch_message_add_tag (self._msg, tag) - - if STATUS.SUCCESS == status: - # return on success - return status - - raise NotmuchError(status) - - def remove_tag(self, tag): - """Removes a tag from the given message - - If the message has no such tag, this is a non-operation and - will report success anyway. - - :param tag: String with a 'tag' to be removed. - :returns: STATUS.SUCCESS if the tag was successfully removed or if - the message had no such tag. - Raises an exception otherwise. - :exception: :exc:`NotmuchError`. They have the following meaning: - - STATUS.NULL_POINTER - The 'tag' argument is NULL - STATUS.TAG_TOO_LONG - The length of 'tag' is too long - (exceeds NOTMUCH_TAG_MAX) - STATUS.READ_ONLY_DATABASE - Database was opened in read-only mode so message cannot - be modified. - STATUS.NOT_INITIALIZED - The message has not been initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - status = nmlib.notmuch_message_remove_tag(self._msg, tag) - - if STATUS.SUCCESS == status: - # return on success - return status - - raise NotmuchError(status) - - def remove_all_tags(self): - """Removes all tags from the given message. - - See :meth:`freeze` for an example showing how to safely - replace tag values. - - :returns: STATUS.SUCCESS if the tags were successfully removed. - Raises an exception otherwise. - :exception: :exc:`NotmuchError`. They have the following meaning: - - STATUS.READ_ONLY_DATABASE - Database was opened in read-only mode so message cannot - be modified. - STATUS.NOT_INITIALIZED - The message has not been initialized. - """ - if self._msg is None: - raise NotmuchError(STATUS.NOT_INITIALIZED) - - status = nmlib.notmuch_message_remove_all_tags(self._msg) - - if STATUS.SUCCESS == status: - # return on success - return status - - raise NotmuchError(status) + def __iter__(self): + """ Make Filenames an iterator """ + return self - def freeze(self): - """Freezes the current state of 'message' within the database - - This means that changes to the message state, (via :meth:`add_tag`, - :meth:`remove_tag`, and :meth:`remove_all_tags`), will not be - committed to the database until the message is :meth:`thaw`ed. - - Multiple calls to freeze/thaw are valid and these calls will - "stack". That is there must be as many calls to thaw as to freeze - before a message is actually thawed. - - The ability to do freeze/thaw allows for safe transactions to - change tag values. For example, explicitly setting a message to - have a given set of tags might look like this:: - - msg.freeze() - msg.remove_all_tags() - for tag in new_tags: - msg.add_tag(tag) - msg.thaw() - - With freeze/thaw used like this, the message in the database is - guaranteed to have either the full set of original tag values, or - the full set of new tag values, but nothing in between. - - Imagine the example above without freeze/thaw and the operation - somehow getting interrupted. This could result in the message being - left with no tags if the interruption happened after - :meth:`remove_all_tags` but before :meth:`add_tag`. - - :returns: STATUS.SUCCESS if the message was successfully frozen. - Raises an exception otherwise. - :exception: :exc:`NotmuchError`. They have the following meaning: - - STATUS.READ_ONLY_DATABASE - Database was opened in read-only mode so message cannot - be modified. - STATUS.NOT_INITIALIZED - The message has not been initialized. - """ - if self._msg is None: + def next(self): + if self._files_p is None: raise NotmuchError(STATUS.NOT_INITIALIZED) - - status = nmlib.notmuch_message_freeze(self._msg) - - if STATUS.SUCCESS == status: - # return on success - return status - raise NotmuchError(status) - - def thaw(self): - """Thaws the current 'message' - - Thaw the current 'message', synchronizing any changes that may have - occurred while 'message' was frozen into the notmuch database. + if not nmlib.notmuch_filenames_valid(self._files_p): + self._files_p = None + raise StopIteration - See :meth:`freeze` for an example of how to use this - function to safely provide tag changes. + file = Filenames._get (self._files_p) + nmlib.notmuch_filenames_move_to_next(self._files_p) + return file - Multiple calls to freeze/thaw are valid and these calls with - "stack". That is there must be as many calls to thaw as to freeze - before a message is actually thawed. + def __len__(self): + """len(:class:`Filenames`) returns the number of contained files - :returns: STATUS.SUCCESS if the message was successfully frozen. - Raises an exception otherwise. - :exception: :exc:`NotmuchError`. They have the following meaning: + .. note:: As this iterates over the files, we will not be able to + iterate over them again! So this will fail:: - STATUS.UNBALANCED_FREEZE_THAW - An attempt was made to thaw an unfrozen message. - That is, there have been an unbalanced number of calls - to :meth:`freeze` and :meth:`thaw`. - STATUS.NOT_INITIALIZED - The message has not been initialized. + #THIS FAILS + files = Database().get_directory('').get_child_files() + if len(files) > 0: #this 'exhausts' msgs + # next line raises NotmuchError(STATUS.NOT_INITIALIZED)!!! + for file in files: print file """ - if self._msg is None: + if self._files_p is None: raise NotmuchError(STATUS.NOT_INITIALIZED) - - status = nmlib.notmuch_message_thaw(self._msg) - - if STATUS.SUCCESS == status: - # return on success - return status - raise NotmuchError(status) - - - def __str__(self): - """A message() is represented by a 1-line summary""" - msg = {} - msg['from'] = self.get_header('from') - msg['tags'] = str(self.get_tags()) - msg['date'] = date.fromtimestamp(self.get_date()) - return "%(from)s (%(date)s) (%(tags)s)" % (msg) - - def format_as_text(self): - """Output like notmuch show (Not implemented)""" - return str(self) + i=0 + while nmlib.notmuch_filenames_valid(self._files_p): + nmlib.notmuch_filenames_move_to_next(self._files_p) + i += 1 + self._files_p = None + return i def __del__(self): - """Close and free the notmuch Message""" - if self._msg is not None: - logging.debug("Freeing the Message now") - nmlib.notmuch_message_destroy (self._msg) + """Close and free Filenames""" + if self._files_p is not None: + nmlib.notmuch_filenames_destroy(self._files_p)