import ctypes from ctypes import c_int, c_char_p, c_void_p from cnotmuch.globals import nmlib, STATUS, NotmuchError import logging class Database(object): """ Wrapper around a notmuch_database_t Do note that as soon as we tear down this object, all derived queries, threads, and messages will be freed as well. """ #constants MODE_READ_ONLY = 0 MODE_READ_WRITE = 1 _std_db_path = None """Class attribute of users default database""" """notmuch_database_get_path (notmuch_database_t *database)""" _get_path = nmlib.notmuch_database_get_path _get_path.restype = c_char_p """notmuch_database_open (const char *path, notmuch_database_mode_t mode)""" _open = nmlib.notmuch_database_open _open.restype = 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)""" _get_all_tags = nmlib.notmuch_database_get_all_tags _get_all_tags.restype = c_void_p """ notmuch_database_create(const char *path):""" _create = nmlib.notmuch_database_create _create.restype = c_void_p def __init__(self, path=None, create=False, status= MODE_READ_ONLY): """ Open or create a notmuch database If path is None, we will try to read a users notmuch configuration and use his default database. Throws a NotmuchError in case of failure. """ self._db = None if path is None: # no path specified. use a user's default database if Database._std_db_path is None: #the following line throws a NotmuchError if it fails Database._std_db_path = self._get_user_default_db() path = Database._std_db_path if create == False: self.open(path, status) else: self.create(path, status) def create(self, path, status=MODE_READ_ONLY): """ notmuch_database_create(const char *path) :returns: Raises :exc:`notmuch.NotmuchError` in case of any failure (after printing an error message on stderr). """ res = Database._create(path, status) if res is None: raise NotmuchError( message="Could not create the specified database") self._db = res def open(self, path, status= MODE_READ_ONLY): """calls notmuch_database_open :returns: Raises :exc:`notmuch.NotmuchError` in case of any failure (after printing an error message on stderr). """ res = Database._open(path, status) if res is None: raise NotmuchError( message="Could not open the specified database") self._db = res def get_path(self): """notmuch_database_get_path (notmuch_database_t *database); """ return Database._get_path(self._db) def find_message(self, msgid): """notmuch_database_find_message :param msgid: The message id :ptype msgid: string :returns: Message() or None if no message is found or if an out-of-memory situation occurs. """ if self._db is None: raise NotmuchError(STATUS.NOT_INITIALIZED) msg_p = Database._find_message(self._db, msgid) if msg_p is None: return None return Message(msg_p, self) def get_all_tags(self): """Return a Tags() object (list of all tags found in the database) :returns: Tags() object or raises :exc:`NotmuchError` with STATUS.NULL_POINTER on error """ if self._db is None: raise NotmuchError(STATUS.NOT_INITIALIZED) tags_p = Database._get_all_tags (self._db) if tags_p == None: raise NotmuchError(STATUS.NULL_POINTER) return Tags(tags_p, self) 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): """ Reads a user's notmuch config and returns his db location Throws a NotmuchError if it cannot find it""" from ConfigParser import SafeConfigParser import os.path config = SafeConfigParser() config.read(os.path.expanduser('~/.notmuch-config')) if not config.has_option('database','path'): raise NotmuchError(message= "No DB path specified and no user default found") return config.get('database','path') @property def db_p(self): """Returns a pointer to the current notmuch_database_t or None""" return self._db #------------------------------------------------------------------------------ class Query(object): """ Wrapper around a notmuch_query_t Do note that as soon as we tear down this object, all derived threads, and messages will be freed as well. """ # constants SORT_OLDEST_FIRST = 0 SORT_NEWEST_FIRST = 1 SORT_MESSAGE_ID = 2 """notmuch_query_create""" _create = nmlib.notmuch_query_create _create.restype = c_void_p """notmuch_query_search_messages""" _search_messages = nmlib.notmuch_query_search_messages _search_messages.restype = c_void_p def __init__(self, db, querystr): """TODO: document""" self._db = None self._query = None self.create(db, querystr) def create(self, db, querystr): """db is a Database() and querystr a string raises NotmuchError STATUS.NOT_INITIALIZED if db is not inited and STATUS.NULL_POINTER if the query creation failed (too little memory) """ if db.db_p is None: raise NotmuchError(STATUS.NOT_INITIALIZED) # create reference to parent db to keep it alive self._db = db # create query, return None if too little mem available query_p = Query._create(db.db_p, querystr) if query_p is None: NotmuchError(STATUS.NULL_POINTER) self._query = query_p def set_sort(self, sort): """notmuch_query_set_sort :param sort: one of Query.SORT_OLDEST_FIRST|SORT_NEWEST_FIRST|SORT_MESSAGE_ID :returns: Nothing, but raises NotmuchError if query is not inited """ if self._query is None: raise NotmuchError(STATUS.NOT_INITIALIZED) nmlib.notmuch_query_set_sort(self._query, sort) def search_messages(self): """notmuch_query_search_messages Returns Messages() or a raises a NotmuchError() """ if self._query is None: raise NotmuchError(STATUS.NOT_INITIALIZED) msgs_p = Query._search_messages(self._query) if msgs_p is None: NotmuchError(STATUS.NULL_POINTER) return Messages(msgs_p,self) 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): """Wrapper around notmuch_tags_t""" #notmuch_tags_get _get = nmlib.notmuch_tags_get _get.restype = c_char_p def __init__(self, tags_p, db=None): """ msg_p is a pointer to an notmuch_message_t Structure. If it is None, we will raise an NotmuchError(STATUS.NULL_POINTER). Is passed the db 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. Tags() provides an iterator over all contained tags. However, you will only be able to iterate over the Tags once, because the underlying C function only allows iterating once. #TODO: make the iterator work more than once and cache the tags in the Python object. """ if tags_p is None: NotmuchError(STATUS.NULL_POINTER) self._tags = tags_p self._db = db logging.debug("Inited Tags derived from %s" %(str(db))) 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 __str__(self): """str() of Tags() is a space separated list of tags This iterates over the list of Tags and will therefore 'exhaust' Tags() """ 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) #------------------------------------------------------------------------------ class Messages(object): """Wrapper around notmuch_messages_t""" #notmuch_tags_get _get = nmlib.notmuch_messages_get _get.restype = c_void_p _collect_tags = nmlib.notmuch_messages_collect_tags _collect_tags.restype = c_void_p def __init__(self, msgs_p, parent=None): """ msg_p is a pointer to an notmuch_messages_t Structure. If it is None, we will raise an NotmuchError(STATUS.NULL_POINTER). If passed the parent query this Messages() is derived from, it saves a reference to it, so we can automatically delete the parent query object once all derived objects are dead. Messages() provides an iterator over all contained Message()s. However, you will only be able to iterate over it once, because the underlying C function only allows iterating once. #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) 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))) def collect_tags(self): """ return the Tags() belonging to the messages Do note that collect_tags will iterate over the messages and therefore will not allow further iterationsl Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited """ if self._msgs is None: raise NotmuchError(STATUS.NOT_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 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): """ 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)! """ if self._msgs is None: raise NotmuchError(STATUS.NOT_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 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) #------------------------------------------------------------------------------ class Message(object): """Wrapper around notmuch_message_t""" """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_tags (notmuch_message_t *message)""" _get_tags = nmlib.notmuch_message_get_tags _get_tags.restype = c_void_p def __init__(self, msg_p, parent=None): """ msg_p is a pointer to an notmuch_message_t Structure. If it is None, we will raise an NotmuchError(STATUS.NULL_POINTER). Is 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. """ if msg_p is None: NotmuchError(STATUS.NULL_POINTER) self._msg = msg_p #keep reference to parent, so we keep it alive self._parent = parent logging.debug("Inited Message derived from %s" %(str(parent))) def get_message_id(self): """ return the msg id Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited """ if self._msg is None: raise NotmuchError(STATUS.NOT_INITIALIZED) return Message._get_message_id(self._msg) def get_filename(self): """ return the msg filename Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited """ if self._msg is None: raise NotmuchError(STATUS.NOT_INITIALIZED) return Message._get_filename(self._msg) def get_tags(self): """ return the msg tags Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited Raises NotmuchError(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 __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)