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"""
This file is part of alot.
Alot 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.
Alot 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 (C) 2011 Patrick Totzke <patricktotzke@gmail.com>
"""
from notmuch import Database, NotmuchError
from datetime import datetime
from collections import deque
from message import Message
from settings import notmuchconfig as config
DB_ENC = 'utf-8'
class DatabaseError(Exception):
pass
class DatabaseROError(DatabaseError):
pass
class DatabaseLockedError(DatabaseError):
pass
class DBManager:
"""
keeps track of your index parameters, can create notmuch.Query
objects from its Database on demand and implements a bunch of
database specific functions.
"""
def __init__(self, path=None, ro=False):
"""
:param path: absolute path to the notmuch index
:type path: str
:param ro: open the index in read-only mode
:type ro: boolean
"""
self.ro = ro
self.path = path
self.writequeue = deque([])
def flush(self):
"""
tries to flush all queued write commands to the index.
:exception: :exc:`DatabaseROError` if db is opened in read-only mode
:exception: :exc:`DatabaseLockedError` if db is locked
"""
if self.ro:
raise DatabaseROError()
if self.writequeue:
try:
mode = Database.MODE.READ_WRITE
db = Database(path=self.path, mode=mode)
except NotmuchError:
raise DatabaseLockedError()
while self.writequeue:
cmd, querystring, tags, sync = self.writequeue.popleft()
query = db.create_query(querystring)
for msg in query.search_messages():
msg.freeze()
if cmd == 'tag':
for tag in tags:
msg.add_tag(tag.encode(DB_ENC),
sync_maildir_flags=sync)
if cmd == 'set':
msg.remove_all_tags()
for tag in tags:
msg.add_tag(tag.encode(DB_ENC),
sync_maildir_flags=sync)
elif cmd == 'untag':
for tag in tags:
msg.remove_tag(tag.encode(DB_ENC),
sync_maildir_flags=sync)
msg.thaw()
def tag(self, querystring, tags, remove_rest=False):
"""
add tags to all matching messages. Raises
:exc:`DatabaseROError` if in read only mode.
:param querystring: notmuch search string
:type querystring: str
:param tags: a list of tags to be added
:type tags: list of str
:param remove_rest: remove tags from matching messages before tagging
:type remove_rest: boolean
:exception: :exc:`NotmuchError`
"""
if self.ro:
raise DatabaseROError()
sync_maildir_flags = config.getboolean('maildir', 'synchronize_flags')
if remove_rest:
self.writequeue.append(('set', querystring, tags,
sync_maildir_flags))
else:
self.writequeue.append(('tag', querystring, tags,
sync_maildir_flags))
def untag(self, querystring, tags):
"""
add tags to all matching messages. Raises
:exc:`DatabaseROError` if in read only mode.
:param querystring: notmuch search string
:type querystring: str
:param tags: a list of tags to be added
:type tags: list of str
:exception: :exc:`NotmuchError`
"""
if self.ro:
raise DatabaseROError()
sync_maildir_flags = config.getboolean('maildir', 'synchronize_flags')
self.writequeue.append(('untag', querystring, tags,
sync_maildir_flags))
def count_messages(self, querystring):
"""returns number of messages that match querystring"""
return self.query(querystring).count_messages()
def search_thread_ids(self, querystring):
"""returns the ids of all threads that match the querystring
This copies! all integer thread ids into an new list."""
threads = self.query(querystring).search_threads()
return [thread.get_thread_id() for thread in threads]
def get_thread(self, tid):
"""returns the thread with given id as alot.db.Thread object"""
query = self.query('thread:' + tid)
#TODO raise exceptions here in 0<case msgcount>1
try:
return Thread(self, query.search_threads().next())
except:
return None
def get_all_tags(self):
"""returns all tags as list of strings"""
db = Database(path=self.path)
return [t for t in db.get_all_tags()]
def query(self, querystring):
"""creates notmuch.Query objects on demand
:param querystring: The query string to use for the lookup
:type query: str.
:returns: notmuch.Query -- the query object.
"""
mode = Database.MODE.READ_ONLY
db = Database(path=self.path, mode=mode)
return db.create_query(querystring)
class Thread:
def __init__(self, dbman, thread):
"""
:param dbman: db manager that is used for further lookups
:type dbman: alot.db.DBManager
:param msg: the wrapped thread
:type msg: notmuch.database.Thread
"""
self._dbman = dbman
self._id = thread.get_thread_id()
self.refresh(thread)
def refresh(self, thread=None):
if not thread:
query = self._dbman.query('thread:' + self._id)
thread = query.search_threads().next()
self._total_messages = thread.get_total_messages()
self._authors = thread.get_authors()
self._subject = thread.get_subject()
ts = thread.get_oldest_date()
self._oldest_date = datetime.fromtimestamp(ts)
self._newest_date = datetime.fromtimestamp(thread.get_newest_date())
self._tags = set([t for t in thread.get_tags()])
self._messages = {} # this maps messages to its children
self._toplevel_messages = []
def __str__(self):
return "thread:%s: %s" % (self._id, self.get_subject())
def get_thread_id(self):
"""returns id of this thread"""
return self._id
def get_tags(self):
"""returns tags attached to this thread as list of strings"""
l = list(self._tags)
l.sort()
return l
def add_tags(self, tags):
"""adds tags to all messages in this thread
:param tags: tags to add
:type tags: list of str
"""
newtags = set(tags).difference(self._tags)
if newtags:
self._dbman.tag('thread:' + self._id, newtags)
self._tags = self._tags.union(newtags)
def remove_tags(self, tags):
"""remove tags from all messages in this thread
:param tags: tags to remove
:type tags: list of str
"""
rmtags = set(tags).intersection(self._tags)
if rmtags:
self._dbman.untag('thread:' + self._id, tags)
self._tags = self._tags.difference(rmtags)
def set_tags(self, tags):
"""set tags of all messages in this thread. This removes all tags and
attaches the given ones in one step.
:param tags: tags to add
:type tags: list of str
"""
if tags != self._tags:
self._dbman.tag('thread:' + self._id, tags, remove_rest=True)
self._tags = set(tags)
def get_authors(self): # TODO: make this return a list of strings
"""returns all authors in this thread"""
return self._authors
def get_subject(self):
"""returns this threads subject"""
return self._subject
def get_toplevel_messages(self):
"""returns all toplevel messages as list of :class:`Message`"""
if not self._messages:
self.get_messages()
return self._toplevel_messages
def get_messages(self):
"""returns all messages in this thread
:returns: dict mapping all contained :class:`Message`s to a list of
their respective children.
"""
if not self._messages:
query = self._dbman.query('thread:' + self._id)
thread = query.search_threads().next()
def accumulate(acc, msg):
M = Message(self._dbman, msg, thread=self)
acc[M] = []
r = msg.get_replies()
if r is not None:
for m in r:
acc[M].append(accumulate(acc, m))
return M
self._messages = {}
for m in thread.get_toplevel_messages():
self._toplevel_messages.append(accumulate(self._messages, m))
return self._messages
def get_replies_to(self, msg):
"""returns all replies to the given message
:param msg: the parent message, must be contained in thread
:type msg: alot.sb.Message
"""
mid = msg.get_message_id()
msg_hash = self.get_messages()
for m in msg_hash.keys():
if m.get_message_id() == mid:
return msg_hash[m]
return None
def get_newest_date(self):
"""returns date header of newest message in this thread as datetime"""
return self._newest_date
def get_oldest_date(self):
"""returns date header of oldest message in this thread as datetime"""
return self._oldest_date
def get_total_messages(self):
"""returns number of contained messages"""
return self._total_messages
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