""" 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 . Copyright 2010 Sebastian Spaeth Jesse Rosenthal """ from ctypes import c_char_p, c_long, c_uint, c_int, POINTER, byref from datetime import date from .globals import ( nmlib, Enum, _str, Python3StringMixIn, NotmuchTagsP, NotmuchMessageP, NotmuchMessagesP, NotmuchFilenamesP, ) from .errors import ( STATUS, NotmuchError, NullPointerError, NotInitializedError, ) from .tag import Tags from .filenames import Filenames import email import sys class Message(Python3StringMixIn): """Represents a single Email message Technically, this wraps the underlying *notmuch_message_t* structure. A user will usually not create these objects themselves but get them as search results. As it implements :meth:`__cmp__`, it is possible to compare two :class:`Message`\s using `if msg1 == msg2: ...`. """ """notmuch_message_get_filename (notmuch_message_t *message)""" _get_filename = nmlib.notmuch_message_get_filename _get_filename.argtypes = [NotmuchMessageP] _get_filename.restype = c_char_p """return all filenames for a message""" _get_filenames = nmlib.notmuch_message_get_filenames _get_filenames.argtypes = [NotmuchMessageP] _get_filenames.restype = NotmuchFilenamesP """notmuch_message_get_flag""" _get_flag = nmlib.notmuch_message_get_flag _get_flag.argtypes = [NotmuchMessageP, c_uint] _get_flag.restype = bool """notmuch_message_set_flag""" _set_flag = nmlib.notmuch_message_set_flag _set_flag.argtypes = [NotmuchMessageP, c_uint, c_int] _set_flag.restype = None """notmuch_message_get_message_id (notmuch_message_t *message)""" _get_message_id = nmlib.notmuch_message_get_message_id _get_message_id.argtypes = [NotmuchMessageP] _get_message_id.restype = c_char_p """notmuch_message_get_thread_id""" _get_thread_id = nmlib.notmuch_message_get_thread_id _get_thread_id.argtypes = [NotmuchMessageP] _get_thread_id.restype = c_char_p """notmuch_message_get_replies""" _get_replies = nmlib.notmuch_message_get_replies _get_replies.argtypes = [NotmuchMessageP] _get_replies.restype = NotmuchMessagesP """notmuch_message_get_tags (notmuch_message_t *message)""" _get_tags = nmlib.notmuch_message_get_tags _get_tags.argtypes = [NotmuchMessageP] _get_tags.restype = NotmuchTagsP _get_date = nmlib.notmuch_message_get_date _get_date.argtypes = [NotmuchMessageP] _get_date.restype = c_long _get_header = nmlib.notmuch_message_get_header _get_header.argtypes = [NotmuchMessageP, c_char_p] _get_header.restype = c_char_p """notmuch_status_t ..._maildir_flags_to_tags (notmuch_message_t *)""" _tags_to_maildir_flags = nmlib.notmuch_message_tags_to_maildir_flags _tags_to_maildir_flags.argtypes = [NotmuchMessageP] _tags_to_maildir_flags.restype = c_int """notmuch_status_t ..._tags_to_maildir_flags (notmuch_message_t *)""" _maildir_flags_to_tags = nmlib.notmuch_message_maildir_flags_to_tags _maildir_flags_to_tags.argtypes = [NotmuchMessageP] _maildir_flags_to_tags.restype = c_int """notmuch_message_get_property""" _get_property = nmlib.notmuch_message_get_property _get_property.argtypes = [NotmuchMessageP, c_char_p, POINTER(c_char_p)] _get_property.restype = c_int #Constants: Flags that can be set/get with set_flag FLAG = Enum(['MATCH']) 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:`NullPointerError`. :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 not msg_p: raise NullPointerError() 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 :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() return Message._get_message_id(self._msg).decode('utf-8', 'ignore') 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 :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() return Message._get_thread_id(self._msg).decode('utf-8', 'ignore') 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 an empty Messages iterator. :returns: :class:`Messages`. :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() msgs_p = Message._get_replies(self._msg) from .messages import Messages, EmptyMessagesResult if not msgs_p: return EmptyMessagesResult(self) 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 :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() return Message._get_date(self._msg) def get_header(self, header): """Get the value of the specified header. The value will be read from the actual message file, not from the notmuch database. The header name is case insensitive. Returns an empty string ("") if the message does not contain a header line matching 'header'. :param header: The name of the header to be retrieved. It is not case-sensitive. :type header: str :returns: The header value as string :raises: :exc:`NotInitializedError` if the message is not initialized :raises: :exc:`NullPointerError` if any error occured """ if not self._msg: raise NotInitializedError() #Returns NULL if any error occurs. header = Message._get_header(self._msg, _str(header)) if header == None: raise NullPointerError() return header.decode('UTF-8', 'ignore') def get_filename(self): """Returns the file path of the message file :returns: Absolute file path & name of the message file :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() return Message._get_filename(self._msg).decode('utf-8', 'ignore') def get_filenames(self): """Get all filenames for the email corresponding to 'message' Returns a Filenames() generator with all absolute filepaths for messages recorded to have the same Message-ID. These files must not necessarily have identical content.""" if not self._msg: raise NotInitializedError() files_p = Message._get_filenames(self._msg) return Filenames(files_p, self) def get_flag(self, flag): """Checks whether a specific flag is set for this message The method :meth:`Query.search_threads` sets *Message.FLAG.MATCH* for those messages that match the query. This method allows us to get the value of this flag. :param flag: One of the :attr:`Message.FLAG` values (currently only *Message.FLAG.MATCH* :returns: An unsigned int (0/1), indicating whether the flag is set. :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() return Message._get_flag(self._msg, flag) def set_flag(self, flag, value): """Sets/Unsets a specific flag for this message :param flag: One of the :attr:`Message.FLAG` values (currently only *Message.FLAG.MATCH* :param value: A bool indicating whether to set or unset the flag. :raises: :exc:`NotInitializedError` if the message is not initialized. """ if not self._msg: raise NotInitializedError() self._set_flag(self._msg, flag, value) def get_tags(self): """Returns the message tags :returns: A :class:`Tags` iterator. :raises: :exc:`NotInitializedError` if the message is not initialized :raises: :exc:`NullPointerError` if any error occured """ if not self._msg: raise NotInitializedError() tags_p = Message._get_tags(self._msg) if not tags_p: raise NullPointerError() return Tags(tags_p, self) _add_tag = nmlib.notmuch_message_add_tag _add_tag.argtypes = [NotmuchMessageP, c_char_p] _add_tag.restype = c_uint def add_tag(self, tag, sync_maildir_flags=False): """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. :param sync_maildir_flags: If notmuch configuration is set to do this, add maildir flags corresponding to notmuch tags. See underlying method :meth:`tags_to_maildir_flags`. Use False if you want to add/remove many tags on a message without having to physically rename the file every time. Do note, that this will do nothing when a message is frozen, as tag changes will not be committed to the database yet. :returns: STATUS.SUCCESS if the tag was successfully added. Raises an exception otherwise. :raises: :exc:`NullPointerError` if the `tag` argument is NULL :raises: :exc:`TagTooLongError` if the length of `tag` exceeds Message.NOTMUCH_TAG_MAX) :raises: :exc:`ReadOnlyDatabaseError` if the database was opened in read-only mode so message cannot be modified :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() status = self._add_tag(self._msg, _str(tag)) # bail out on failure if status != STATUS.SUCCESS: raise NotmuchError(status) if sync_maildir_flags: self.tags_to_maildir_flags() return STATUS.SUCCESS _remove_tag = nmlib.notmuch_message_remove_tag _remove_tag.argtypes = [NotmuchMessageP, c_char_p] _remove_tag.restype = c_uint def remove_tag(self, tag, sync_maildir_flags=False): """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. :param sync_maildir_flags: If notmuch configuration is set to do this, add maildir flags corresponding to notmuch tags. See underlying method :meth:`tags_to_maildir_flags`. Use False if you want to add/remove many tags on a message without having to physically rename the file every time. Do note, that this will do nothing when a message is frozen, as tag changes will not be committed to the database yet. :returns: STATUS.SUCCESS if the tag was successfully removed or if the message had no such tag. Raises an exception otherwise. :raises: :exc:`NullPointerError` if the `tag` argument is NULL :raises: :exc:`TagTooLongError` if the length of `tag` exceeds Message.NOTMUCH_TAG_MAX) :raises: :exc:`ReadOnlyDatabaseError` if the database was opened in read-only mode so message cannot be modified :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() status = self._remove_tag(self._msg, _str(tag)) # bail out on error if status != STATUS.SUCCESS: raise NotmuchError(status) if sync_maildir_flags: self.tags_to_maildir_flags() return STATUS.SUCCESS _remove_all_tags = nmlib.notmuch_message_remove_all_tags _remove_all_tags.argtypes = [NotmuchMessageP] _remove_all_tags.restype = c_uint def remove_all_tags(self, sync_maildir_flags=False): """Removes all tags from the given message. See :meth:`freeze` for an example showing how to safely replace tag values. :param sync_maildir_flags: If notmuch configuration is set to do this, add maildir flags corresponding to notmuch tags. See :meth:`tags_to_maildir_flags`. Use False if you want to add/remove many tags on a message without having to physically rename the file every time. Do note, that this will do nothing when a message is frozen, as tag changes will not be committed to the database yet. :returns: STATUS.SUCCESS if the tags were successfully removed. Raises an exception otherwise. :raises: :exc:`ReadOnlyDatabaseError` if the database was opened in read-only mode so message cannot be modified :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() status = self._remove_all_tags(self._msg) # bail out on error if status != STATUS.SUCCESS: raise NotmuchError(status) if sync_maildir_flags: self.tags_to_maildir_flags() return STATUS.SUCCESS _freeze = nmlib.notmuch_message_freeze _freeze.argtypes = [NotmuchMessageP] _freeze.restype = c_uint def get_property(self, prop): """ Retrieve the value for a single property key :param prop: The name of the property to get. :returns: String with the property value or None if there is no such key. In the case of multiple values for the given key, the first one is retrieved. :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() value = c_char_p("") status = Message._get_property(self._msg, prop, byref(value)) if status != 0: raise NotmuchError(status) return value.value 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(False) for tag in new_tags: msg.add_tag(tag, False) msg.thaw() msg.tags_to_maildir_flags() 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. :raises: :exc:`ReadOnlyDatabaseError` if the database was opened in read-only mode so message cannot be modified :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() status = self._freeze(self._msg) if STATUS.SUCCESS == status: # return on success return status raise NotmuchError(status) _thaw = nmlib.notmuch_message_thaw _thaw.argtypes = [NotmuchMessageP] _thaw.restype = c_uint 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. :raises: :exc:`UnbalancedFreezeThawError` if 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`. :raises: :exc:`NotInitializedError` if message has not been initialized """ if not self._msg: raise NotInitializedError() status = self._thaw(self._msg) if STATUS.SUCCESS == status: # return on success return status raise NotmuchError(status) def is_match(self): """(Not implemented)""" return self.get_flag(Message.FLAG.MATCH) def tags_to_maildir_flags(self): """Synchronize notmuch tags to file Maildir flags 'D' if the message has the "draft" tag 'F' if the message has the "flagged" tag 'P' if the message has the "passed" tag 'R' if the message has the "replied" tag 'S' if the message does not have the "unread" tag Any existing flags unmentioned in the list above will be preserved in the renaming. Also, if this filename is in a directory named "new", rename it to be within the neighboring directory named "cur". Do note that calling this method while a message is frozen might not work yet, as the modified tags have not been committed yet to the database. :returns: a :class:`STATUS` value. In short, you want to see notmuch.STATUS.SUCCESS here. See there for details.""" if not self._msg: raise NotInitializedError() return Message._tags_to_maildir_flags(self._msg) def maildir_flags_to_tags(self): """Synchronize file Maildir flags to notmuch tags Flag Action if present ---- ----------------- 'D' Adds the "draft" tag to the message 'F' Adds the "flagged" tag to the message 'P' Adds the "passed" tag to the message 'R' Adds the "replied" tag to the message 'S' Removes the "unread" tag from the message For each flag that is not present, the opposite action (add/remove) is performed for the corresponding tags. If there are multiple filenames associated with this message, the flag is considered present if it appears in one or more filenames. (That is, the flags from the multiple filenames are combined with the logical OR operator.) As a convenience, you can set the sync_maildir_flags parameter in :meth:`Database.index_file` to implicitly call this. :returns: a :class:`STATUS`. In short, you want to see notmuch.STATUS.SUCCESS here. See there for details.""" if not self._msg: raise NotInitializedError() return Message._maildir_flags_to_tags(self._msg) def __repr__(self): """Represent a Message() object by str()""" return self.__str__() def __unicode__(self): format = "%s (%s) (%s)" return format % (self.get_header('from'), self.get_tags(), date.fromtimestamp(self.get_date()), ) def get_message_parts(self): """Output like notmuch show""" fp = open(self.get_filename(), 'rb') if sys.version_info[0] < 3: email_msg = email.message_from_file(fp) else: email_msg = email.message_from_binary_file(fp) fp.close() out = [] for msg in email_msg.walk(): if not msg.is_multipart(): out.append(msg) return out def get_part(self, num): """Returns the nth message body part""" parts = self.get_message_parts() if (num <= 0 or num > len(parts)): return "" else: out_part = parts[(num - 1)] return out_part.get_payload(decode=True) def __hash__(self): """Implement hash(), so we can use Message() sets""" file = self.get_filename() if not file: return None return hash(file) def __cmp__(self, other): """Implement cmp(), so we can compare Message()s 2 messages are considered equal if they point to the same Message-Id and if they point to the same file names. If 2 Messages derive from different queries where some files have been added or removed, the same messages would not be considered equal (as they do not point to the same set of files any more).""" res = cmp(self.get_message_id(), other.get_message_id()) if res: res = cmp(list(self.get_filenames()), list(other.get_filenames())) return res _destroy = nmlib.notmuch_message_destroy _destroy.argtypes = [NotmuchMessageP] _destroy.restype = None def __del__(self): """Close and free the notmuch Message""" if self._msg: self._destroy(self._msg)