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# Copyright (C) 2011-2012 Patrick Totzke <patricktotzke@gmail.com>
# This file is released under the GNU GPL, version 3 or a later revision.
# For further details see the COPYING file
from datetime import datetime
from .message import Message
from ..settings.const import settings
class Thread:
"""
A wrapper around a notmuch mailthread (:class:`notmuch.database.Thread`)
that ensures persistence of the thread: It can be safely read multiple
times, its manipulation is done via a :class:`alot.db.DBManager` and it can
directly provide contained messages as :class:`~alot.db.message.Message`.
"""
"""
date header of oldest message in this thread as
:class:`~datetime.datetime`
"""
oldest_date = None
"""
date header of newest message in this thread as
:class:`~datetime.datetime`
"""
newest_date = None
"""number of contained messages"""
total_messages = None
"""This thread's ID"""
id = None
"""Thread subject"""
subject = None
"""A list of toplevel messages"""
toplevel_messages = None
"""A list of all messages in this thread in depth-first order"""
message_list = None
"""A dict mapping Message-Id strings to Message instances"""
messages = None
def __init__(self, dbman, thread):
"""
:param dbman: db manager that is used for further lookups
:type dbman: :class:`~alot.db.DBManager`
:param thread: the wrapped thread
:type thread: :class:`notmuch.database.Thread`
"""
self._dbman = dbman
self._authors = None
self.id = thread.threadid
self._tags = set()
self.toplevel_messages = []
self.message_list = []
self.messages = {}
self._refresh(thread)
def _refresh(self, thread):
"""refresh thread metadata from the index"""
self.total_messages = len(thread)
self._notmuch_authors_string = thread.authors
subject_type = settings.get('thread_subject')
if subject_type == 'notmuch':
subject = thread.subject
elif subject_type == 'oldest':
try:
first_msg = next(thread.toplevel())
subject = first_msg.header('subject')
except (StopIteration, LookupError):
subject = ''
self.subject = subject
self._authors = None
try:
self.oldest_date = datetime.fromtimestamp(thread.first)
except ValueError: # year is out of range
self.oldest_date = None
try:
self.newest_date = datetime.fromtimestamp(thread.last)
except ValueError: # year is out of range
self.newest_date = None
self._tags = thread.tags
self.messages, self.toplevel_messages, self.message_list = self._gather_messages(thread)
def refresh(self):
with self._dbman._db_ro() as db:
thread = self._dbman._get_notmuch_thread(db, self.id)
self._refresh(thread)
def _gather_messages(self, thread):
msgs = {}
msg_tree = []
msg_list = []
def thread_tree_walk(nm_msg, depth, parent):
msg = Message(self._dbman, self, nm_msg, depth)
msg_list.append(msg)
replies = []
for m in nm_msg.replies():
replies.append(thread_tree_walk(m, depth + 1, msg))
msg.replies = replies
msg.parent = parent
msgs[msg.id] = msg
return msg
for m in thread.toplevel():
msg_tree.append(thread_tree_walk(m, 0, None))
return msgs, msg_tree, msg_list
def __str__(self):
return "thread:%s: %s" % (self.id, self.subject)
def get_tags(self, intersection=False):
"""
returns tagsstrings attached to this thread
:param intersection: return tags present in all contained messages
instead of in at least one (union)
:type intersection: bool
:rtype: set of str
"""
tags = set(self._tags)
if intersection:
for m in self.messages.values():
tags = tags.intersection(set(m.get_tags()))
return tags
def get_authors(self):
"""
returns a list of authors (name, addr) of the messages.
The authors are ordered by msg date and unique (by name/addr).
:rtype: list of (str, str)
"""
if self._authors is None:
# Sort messages with date first (by date ascending), and those
# without a date last.
msgs = sorted(self.messages.values(),
key=lambda m: m.date or datetime.max)
orderby = settings.get('thread_authors_order_by')
self._authors = []
if orderby == 'latest_message':
for m in msgs:
pair = m.get_author()
if pair in self._authors:
self._authors.remove(pair)
self._authors.append(pair)
else: # i.e. first_message
for m in msgs:
pair = m.get_author()
if pair not in self._authors:
self._authors.append(pair)
return self._authors
def get_authors_string(self, own_accts=None, replace_own=None):
"""
returns a string of comma-separated authors
Depending on settings, it will substitute "me" for author name if
address is user's own.
:param own_accts: list of own accounts to replace
:type own_accts: list of :class:`Account`
:param replace_own: whether or not to actually do replacement
:type replace_own: bool
:rtype: str
"""
if replace_own is None:
replace_own = settings.get('thread_authors_replace_me')
if replace_own:
if own_accts is None:
own_accts = settings.get_accounts()
authorslist = []
for aname, aaddress in self.get_authors():
for account in own_accts:
if account.matches_address(aaddress):
aname = settings.get('thread_authors_me')
break
if not aname:
aname = aaddress
if aname not in authorslist:
authorslist.append(aname)
return ', '.join(authorslist)
else:
return self._notmuch_authors_string
def matches(self, query):
"""
Check if this thread matches the given notmuch query.
:param query: The query to check against
:type query: string
:returns: True if this thread matches the given query, False otherwise
:rtype: bool
"""
thread_query = 'thread:%s AND (%s)' % (self.id, query)
num_matches = self._dbman.count_messages(thread_query)
return num_matches > 0
def count_matches(self, query):
"""
Count the number of messags in this thread that match the given notmuch
query.
:param query: The query to check against
:type query: string
"""
thread_query = 'thread:%s AND (%s)' % (self.id, query)
return self._dbman.count_messages(thread_query)
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