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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.
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 <http://www.gnu.org/licenses/>.
Copyright (C) 2011 Patrick Totzke <patricktotzke@gmail.com>
"""
from notmuch import Database, NotmuchError
from datetime import datetime
import email
from collections import deque
from settings import config
import helper
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):
self.ro = ro
self.path = path
self.writequeue = deque([])
def flush(self):
"""
tries to flush all queued write commands to the index
"""
if self.writequeue:
try:
mode = Database.MODE.READ_WRITE
db = Database(path=self.path, mode=mode)
except NotmuchError:
if self.ui: # let the mainloop call us again after timeout
timeout = config.getint('general', 'flush_retry_timeout')
self.ui.update()
def f(*args):
self.flush()
self.ui.mainloop.set_alarm_in(timeout, f)
return
while self.writequeue:
cmd, querystring, tags = 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)
if cmd == 'set':
msg.remove_all_tags()
for tag in tags:
msg.add_tag(tag)
elif cmd == 'untag':
for tag in tags:
msg.remove_tag(tag)
msg.thaw()
if self.ui: # trigger status update
self.ui.update()
def tag(self, querystring, tags, remove_rest=False):
"""
add tags to all matching messages
: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
"""
if remove_rest:
self.writequeue.append(('set', querystring, tags))
else:
self.writequeue.append(('tag', querystring, tags))
self.flush()
def untag(self, querystring, tags):
"""
add tags to all matching messages
:param querystring: notmuch search string
:type querystring: str
:param tags: a list of tags to be added
:type tags: list of str
"""
self.writequeue.append(('untag', querystring, tags))
self.flush()
def count_messages(self, querystring):
return self.query(querystring).count_messages()
def search_thread_ids(self, querystring):
threads = self.query(querystring).search_threads()
return [thread.get_thread_id() for thread in threads]
def find_message(self, mid, writeable=False):
db = Database(path=self.path)
if writeable:
query = self.query('id:' + mid, writeable=writeable)
#TODO raise exceptions here in 0<case msgcount>1
msg = query.search_messages().next()
else:
msg = db.find_message(mid)
return msg
def get_message(self, mid):
"""returns the message with the given id and wrapps it in a Message
:param mid: the message id of the message to look up
:type mid: str.
:returns: Message -- the message.
"""
return Message(self, self.find_message(mid))
def get_thread(self, tid):
query = self.query('thread:' + tid)
#TODO raise exceptions here in 0<case msgcount>1
return Thread(self, query.search_threads().next())
def get_all_tags(self):
mode = Database.MODE.READ_ONLY
db = Database(path=self.path, mode=mode)
return [tag for tag 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):
self.dbman = dbman
self.tid = thread.get_thread_id()
self.strrep = str(thread)
self.total_messages = thread.get_total_messages()
self.topmessages = [m.get_message_id() for m in thread.get_toplevel_messages()]
self.authors = thread.get_authors()
self.subject = thread.get_subject()
self.oldest = datetime.fromtimestamp(thread.get_oldest_date())
self.newest = datetime.fromtimestamp(thread.get_newest_date())
self.tags = set([str(tag) for tag in thread.get_tags()])
def get_thread_id(self):
return self.tid
def get_tags(self):
return list(self.tags)
def add_tags(self, tags):
newtags = set(tags).difference(self.tags)
if newtags:
self.dbman.tag('thread:' + self.tid, newtags)
self.tags = self.tags.union(newtags)
def remove_tags(self, tags):
rmtags = set(tags).intersection(self.tags)
if rmtags:
self.dbman.untag('thread:' + self.tid, tags)
self.tags = self.tags.difference(rmtags)
def set_tags(self, tags):
self.dbman.tag('thread:' + self.tid, tags, remove_rest=True)
self.tags = set(tags)
def get_authors(self):
return self.authors
def get_subject(self):
return self.subject
def _build_messages(self, acc, msg):
M = Message(self.dbman, msg)
acc[M] = {}
r = msg.get_replies()
if r is not None:
for m in r:
self._build_messages(acc[M], m)
def get_messages(self):
query = self.dbman.query('thread:' + self.tid)
thread = query.search_threads().next()
messages = {}
for m in thread.get_toplevel_messages():
self._build_messages(messages, m)
return messages
def get_newest_date(self):
return self.newest
def get_oldest_date(self):
return self.oldest
def get_total_messages(self):
return self.total_messages
class Message:
def __init__(self, dbman, msg):
self.dbman = dbman
self.mid = msg.get_message_id()
self.datetime = datetime.fromtimestamp(msg.get_date())
self.sender = msg.get_header('From')
self.strrep = str(msg)
self.email = None # will be read upon first use
self.tags = set([str(tag) for tag in msg.get_tags()])
def __str__(self):
return self.strrep
def get_replies(self):
#this doesn't work. see Note in doc -> more work here.
return [self.dbman.find_message(mid) for mid in self.replies]
def get_author(self):
return helper.parse_addr(self.sender)
def get_tags(self):
return list(self.tags)
def get_email(self):
if not self.email:
self.email = self.read_mail(self.get_filename())
return self.email
def read_mail(self, filename):
try:
f_mail = open(filename)
except EnvironmentError:
eml = email.message_from_string('Unable to open the file')
else:
eml = email.message_from_file(f_mail)
f_mail.close()
return eml
def add_tags(self, tags):
self.dbman.tag('id:' + self.mid, tags)
self.tags = self.tags.union(tags)
def remove_tags(self, tags):
self.dbman.untag('id:' + self.mid, tags)
self.tags = self.tags.difference(tags)
def get_filename(self):
m = self.dbman.find_message(self.mid)
return m.get_filename()
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