03488ba81b
The attached patch adds syncing the INTERNALDATE of IMAP folders with the mtime of messages in maildir folders. I want this to happen, because I'm running a dovecot over the maildirs synced by offlineimap, and that uses the mtime as the INTERNALDATE. When using mutt to view messages I generally sort based on the received date, which for IMAP folders is the INTERNALDATE. Since this is the first real coding I've done in Python the patch may need to be cleaned up some, but it's working pretty well for me. I've added new messages to each side, and the received date has been preserved going both ways.
227 lines
8.4 KiB
Python
227 lines
8.4 KiB
Python
# Maildir folder support
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# Copyright (C) 2002 John Goerzen
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# <jgoerzen@complete.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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from Base import BaseFolder
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from offlineimap import imaputil
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from offlineimap.ui import UIBase
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from threading import Lock
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import os.path, os, re, time, socket, md5
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foldermatchre = re.compile(',FMD5=([0-9a-f]{32})')
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uidmatchre = re.compile(',U=(\d+)')
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flagmatchre = re.compile(':.*2,([A-Z]+)')
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timeseq = 0
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lasttime = long(0)
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timelock = Lock()
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def gettimeseq():
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global lasttime, timeseq, timelock
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timelock.acquire()
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try:
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thistime = long(time.time())
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if thistime == lasttime:
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timeseq += 1
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return (thistime, timeseq)
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else:
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lasttime = thistime
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timeseq = 0
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return (thistime, timeseq)
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finally:
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timelock.release()
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class MaildirFolder(BaseFolder):
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def __init__(self, root, name, sep, repository, accountname):
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self.name = name
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self.root = root
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self.sep = sep
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self.messagelist = None
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self.repository = repository
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self.accountname = accountname
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BaseFolder.__init__(self)
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def getaccountname(self):
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return self.accountname
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def getfullname(self):
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return os.path.join(self.getroot(), self.getname())
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def getuidvalidity(self):
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"""Maildirs have no notion of uidvalidity, so we just return a magic
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token."""
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return 42
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def _scanfolder(self):
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"""Cache the message list. Maildir flags are:
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R (replied)
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S (seen)
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T (trashed)
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D (draft)
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F (flagged)
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and must occur in ASCII order."""
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retval = {}
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files = []
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nouidcounter = -1 # Messages without UIDs get
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# negative UID numbers.
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for dirannex in ['new', 'cur']:
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fulldirname = os.path.join(self.getfullname(), dirannex)
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files.extend([os.path.join(fulldirname, filename) for
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filename in os.listdir(fulldirname)])
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for file in files:
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messagename = os.path.basename(file)
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foldermatch = foldermatchre.search(messagename)
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if (not foldermatch) or \
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md5.new(self.getvisiblename()).hexdigest() \
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!= foldermatch.group(1):
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# If there is no folder MD5 specified, or if it mismatches,
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# assume it is a foreign (new) message and generate a
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# negative uid for it
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uid = nouidcounter
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nouidcounter -= 1
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else: # It comes from our folder.
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uidmatch = uidmatchre.search(messagename)
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uid = None
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if not uidmatch:
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uid = nouidcounter
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nouidcounter -= 1
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else:
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uid = long(uidmatch.group(1))
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flagmatch = flagmatchre.search(messagename)
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flags = []
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if flagmatch:
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flags = [x for x in flagmatch.group(1)]
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flags.sort()
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retval[uid] = {'uid': uid,
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'flags': flags,
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'filename': file}
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return retval
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def cachemessagelist(self):
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self.messagelist = self._scanfolder()
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def getmessagelist(self):
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return self.messagelist
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def getmessage(self, uid):
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filename = self.messagelist[uid]['filename']
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file = open(filename, 'rt')
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retval = file.read()
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file.close()
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return retval.replace("\r\n", "\n")
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def getmessagetime( self, uid ):
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filename = self.messagelist[uid]['filename']
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st = os.stat(filename)
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return st.st_mtime
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def savemessage(self, uid, content, flags, rtime):
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ui = UIBase.getglobalui()
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ui.debug('maildir', 'savemessage: called to write with flags %s and content %s' % \
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(repr(flags), repr(content)))
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if uid < 0:
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# We cannot assign a new uid.
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return uid
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if uid in self.messagelist:
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# We already have it.
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self.savemessageflags(uid, flags)
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return uid
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if 'S' in flags:
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# If a message has been seen, it goes into the cur
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# directory. CR debian#152482, [complete.org #4]
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newdir = os.path.join(self.getfullname(), 'cur')
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else:
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newdir = os.path.join(self.getfullname(), 'new')
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tmpdir = os.path.join(self.getfullname(), 'tmp')
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messagename = None
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attempts = 0
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while 1:
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if attempts > 15:
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raise IOError, "Couldn't write to file %s" % messagename
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timeval, timeseq = gettimeseq()
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messagename = '%d_%d.%d.%s,U=%d,FMD5=%s' % \
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(timeval,
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timeseq,
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os.getpid(),
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socket.gethostname(),
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uid,
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md5.new(self.getvisiblename()).hexdigest())
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if os.path.exists(os.path.join(tmpdir, messagename)):
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time.sleep(2)
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attempts += 1
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else:
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break
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tmpmessagename = messagename.split(',')[0]
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ui.debug('maildir', 'savemessage: using temporary name %s' % tmpmessagename)
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file = open(os.path.join(tmpdir, tmpmessagename), "wt")
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file.write(content)
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file.close()
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os.utime(os.path.join(tmpdir,tmpmessagename), (rtime,rtime))
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ui.debug('maildir', 'savemessage: moving from %s to %s' % \
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(tmpmessagename, messagename))
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os.link(os.path.join(tmpdir, tmpmessagename),
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os.path.join(newdir, messagename))
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os.unlink(os.path.join(tmpdir, tmpmessagename))
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self.messagelist[uid] = {'uid': uid, 'flags': [],
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'filename': os.path.join(newdir, messagename)}
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self.savemessageflags(uid, flags)
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ui.debug('maildir', 'savemessage: returning uid %d' % uid)
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return uid
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def getmessageflags(self, uid):
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return self.messagelist[uid]['flags']
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def savemessageflags(self, uid, flags):
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oldfilename = self.messagelist[uid]['filename']
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newpath, newname = os.path.split(oldfilename)
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if 'S' in flags:
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# If a message has been seen, it goes into the cur
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# directory. CR debian#152482, [complete.org #4]
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newpath = os.path.join(self.getfullname(), 'cur')
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else:
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newpath = os.path.join(self.getfullname(), 'new')
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infostr = ':'
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infomatch = re.search('(:.*)$', newname)
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if infomatch: # If the info string is present..
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infostr = infomatch.group(1)
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newname = newname.split(':')[0] # Strip off the info string.
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infostr = re.sub('2,[A-Z]*', '', infostr)
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flags.sort()
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infostr += '2,' + ''.join(flags)
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newname += infostr
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newfilename = os.path.join(newpath, newname)
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if (newfilename != oldfilename):
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os.rename(oldfilename, newfilename)
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self.messagelist[uid]['flags'] = flags
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self.messagelist[uid]['filename'] = newfilename
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def deletemessage(self, uid):
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if not uid in self.messagelist:
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return
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filename = self.messagelist[uid]['filename']
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try:
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os.unlink(filename)
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except OSError:
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# Can't find the file -- maybe already deleted?
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newmsglist = self._scanfolder()
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if uid in newmsglist: # Nope, try new filename.
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os.unlink(newmsglist[uid]['filename'])
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# Yep -- return.
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del(self.messagelist[uid])
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