+from ctypes import c_char_p, c_void_p, c_uint64
+from datetime import date
+from cnotmuch.globals import nmlib, STATUS, NotmuchError
+from cnotmuch.tag import Tags
+#------------------------------------------------------------------------------
+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())
+ """
+
+ #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):
+ """
+ :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)
+
+ self._msgs = msgs_p
+ #store parent, so we keep them alive as long as self is alive
+ self._parent = parent
+
+ def collect_tags(self):
+ """Return the unique :class:`Tags` in the contained messages
+
+ :returns: :class:`Tags`
+ :exceptions: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if not inited
+
+ .. note:: :meth:`collect_tags` will iterate over the messages and
+ therefore will not allow further iterations.
+ """
+ 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):
+ """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! So this will fail::
+
+ #THIS FAILS
+ msgs = Database().create_query('').search_message()
+ if len(msgs) > 0: #this 'exhausts' msgs
+ # next line raises NotmuchError(STATUS.NOT_INITIALIZED)!!!
+ for msg in msgs: print msg
+
+ Most of the time, using the
+ :meth:`Query.count_messages` is therefore more
+ appropriate (and much faster). While not guaranteeing
+ that it will return the exact same number than len(),
+ in my tests it effectively always did so.
+ """
+ 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:
+ nmlib.notmuch_messages_destroy (self._msgs)
+
+
+#------------------------------------------------------------------------------
+class Message(object):
+ """Represents a single Email message
+
+ Technically, this wraps the underlying *notmuch_message_t* structure.
+ """
+
+ """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_replies"""
+ _get_replies = nmlib.notmuch_message_get_replies
+ _get_replies.restype = c_void_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
+
+ def __init__(self, msg_p, parent=None):
+ """
+ :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.
+ """
+ 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
+
+
+ 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_replies(self):
+ """Gets all direct replies to this message as :class:`Messages` iterator
+
+ .. note:: This call only makes sense if 'message' was
+ ultimately obtained from a :class:`Thread` object, (such as
+ by coming directly from the result of calling
+ :meth:`Thread.get_toplevel_messages` or by any number of
+ subsequent calls to :meth:`get_replies`). If this message was
+ obtained through some non-thread means, (such as by a call
+ to :meth:`Query.search_messages`), then this function will
+ return `None`.
+
+ :returns: :class:`Messages` or `None` if there are no replies to
+ this message.
+ :exception: :exc:`NotmuchError` STATUS.NOT_INITIALIZED if the message
+ is not initialized.
+ """
+ if self._msg is None:
+ raise NotmuchError(STATUS.NOT_INITIALIZED)
+
+ msgs_p = Message._get_replies(self._msg);
+
+ if msgs_p is None:
+ return None
+
+ return Messages(msgs_p,self)
+
+ 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):
+ """Returns 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):
+ """Returns the message tags
+
+ :returns: A :class:`Tags` iterator.
+ :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):
+ """Adds 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 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:
+ 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.
+
+ See :meth:`freeze` for an example of how to use this
+ function to safely provide tag changes.
+
+ 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.
+
+ :returns: STATUS.SUCCESS if the message was successfully frozen.
+ Raises an exception otherwise.
+ :exception: :exc:`NotmuchError`. They have the following meaning:
+
+ 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.
+ """
+ if self._msg 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())
+ replies = self.get_replies()
+ msg['replies'] = len(replies) if replies is not None else -1
+ return "%(from)s (%(date)s) (%(tags)s) (%(replies)d) replies" % (msg)
+
+ def format_as_text(self):
+ """Output like notmuch show (Not implemented)"""
+ return str(self)
+
+ def __del__(self):
+ """Close and free the notmuch Message"""
+ if self._msg is not None:
+ nmlib.notmuch_message_destroy (self._msg)
projects / notmuch / commitdiff