273 lines
11 KiB
Python
273 lines
11 KiB
Python
# Base repository support
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# Copyright (C) 2002-2015 John Goerzen & contributors
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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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import re
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import os.path
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from sys import exc_info
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from offlineimap import CustomConfig
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from offlineimap.ui import getglobalui
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from offlineimap.error import OfflineImapError
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class BaseRepository(CustomConfig.ConfigHelperMixin, object):
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def __init__(self, reposname, account):
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self.ui = getglobalui()
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self.account = account
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self.config = account.getconfig()
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self.name = reposname
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self.localeval = account.getlocaleval()
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self._accountname = self.account.getname()
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self._readonly = self.getconfboolean('readonly', False)
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self.uiddir = os.path.join(self.config.getmetadatadir(), 'Repository-' + self.name)
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if not os.path.exists(self.uiddir):
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os.mkdir(self.uiddir, 0o700)
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self.mapdir = os.path.join(self.uiddir, 'UIDMapping')
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if not os.path.exists(self.mapdir):
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os.mkdir(self.mapdir, 0o700)
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# FIXME: self.uiddir variable name is lying about itself.
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self.uiddir = os.path.join(self.uiddir, 'FolderValidity')
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if not os.path.exists(self.uiddir):
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os.mkdir(self.uiddir, 0o700)
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self.nametrans = lambda foldername: foldername
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self.folderfilter = lambda foldername: 1
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self.folderincludes = []
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self.foldersort = None
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if self.config.has_option(self.getsection(), 'nametrans'):
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self.nametrans = self.localeval.eval(
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self.getconf('nametrans'), {'re': re})
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if self.config.has_option(self.getsection(), 'folderfilter'):
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self.folderfilter = self.localeval.eval(
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self.getconf('folderfilter'), {'re': re})
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if self.config.has_option(self.getsection(), 'folderincludes'):
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self.folderincludes = self.localeval.eval(
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self.getconf('folderincludes'), {'re': re})
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if self.config.has_option(self.getsection(), 'foldersort'):
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self.foldersort = self.localeval.eval(
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self.getconf('foldersort'), {'re': re})
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def restore_atime(self):
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"""Sets folders' atime back to their values after a sync
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Controlled by the 'restoreatime' config parameter (default
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False), applies only to local Maildir mailboxes and does nothing
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on all other repository types."""
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pass
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def connect(self):
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"""Establish a connection to the remote, if necessary. This exists
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so that IMAP connections can all be established up front, gathering
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passwords as needed. It was added in order to support the
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error recovery -- we need to connect first outside of the error
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trap in order to validate the password, and that's the point of
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this function."""
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pass
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def holdordropconnections(self):
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pass
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def dropconnections(self):
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pass
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def getaccount(self):
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return self.account
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def getname(self):
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return self.name
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def __str__(self):
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return self.name
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@property
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def accountname(self):
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"""Account name as string"""
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return self._accountname
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def getuiddir(self):
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return self.uiddir
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def getmapdir(self):
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return self.mapdir
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# Interface from CustomConfig.ConfigHelperMixin
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def getsection(self):
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return 'Repository ' + self.name
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# Interface from CustomConfig.ConfigHelperMixin
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def getconfig(self):
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return self.config
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@property
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def readonly(self):
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"""Is the repository readonly?"""
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return self._readonly
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def getlocaleval(self):
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return self.account.getlocaleval()
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def getfolders(self):
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"""Returns a list of ALL folders on this server."""
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return []
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def forgetfolders(self):
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"""Forgets the cached list of folders, if any. Useful to run
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after a sync run."""
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pass
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def getsep(self):
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raise NotImplementedError
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def should_sync_folder(self, fname):
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"""Should this folder be synced?"""
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return fname in self.folderincludes or self.folderfilter(fname)
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def get_create_folders(self):
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"""Is folder creation enabled on this repository?
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It is disabled by either setting the whole repository
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'readonly' or by using the 'createfolders' setting."""
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return (not self._readonly) and \
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self.getconfboolean('createfolders', True)
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def makefolder(self, foldername):
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"""Create a new folder."""
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raise NotImplementedError
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def deletefolder(self, foldername):
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raise NotImplementedError
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def getfolder(self, foldername):
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raise NotImplementedError
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def sync_folder_structure(self, dst_repo, status_repo):
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"""Syncs the folders in this repository to those in dest.
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It does NOT sync the contents of those folders. nametrans rules
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in both directions will be honored, but there are NO checks yet
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that forward and backward nametrans actually match up!
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Configuring nametrans on BOTH repositories therefore could lead
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to infinite folder creation cycles."""
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if not self.get_create_folders() and not dst_repo.get_create_folders():
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# quick exit if no folder creation is enabled on either side.
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return
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src_repo = self
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src_folders = src_repo.getfolders()
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dst_folders = dst_repo.getfolders()
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# Do we need to refresh the folder list afterwards?
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src_haschanged, dst_haschanged = False, False
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# Create hashes with the names, but convert the source folders
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# to the dest folder's sep.
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src_hash = {}
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for folder in src_folders:
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src_hash[folder.getvisiblename().replace(
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src_repo.getsep(), dst_repo.getsep())] = folder
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dst_hash = {}
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for folder in dst_folders:
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dst_hash[folder.getvisiblename().replace(
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dst_repo.getsep(), src_repo.getsep())] = folder
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# Find new folders on src_repo.
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for src_name_t, src_folder in src_hash.iteritems():
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# Don't create on dst_repo, if it is readonly
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if not dst_repo.get_create_folders():
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break
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if src_folder.sync_this and not src_name_t in dst_folders:
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try:
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dst_repo.makefolder(src_name_t)
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dst_haschanged = True # Need to refresh list
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except OfflineImapError as e:
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self.ui.error(e, exc_info()[2],
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"Creating folder %s on repository %s"%
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(src_name_t, dst_repo))
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raise
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status_repo.makefolder(src_name_t.replace(dst_repo.getsep(),
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status_repo.getsep()))
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# Find new folders on dst_repo.
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for dst_name_t, dst_folder in dst_hash.iteritems():
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if not src_repo.get_create_folders():
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# Don't create missing folder on readonly repo.
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break
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if dst_folder.sync_this and not dst_name_t in src_folders:
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# nametrans sanity check!
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# Does nametrans back&forth lead to identical names?
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# 1) would src repo filter out the new folder name? In this
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# case don't create it on it:
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if not self.should_sync_folder(dst_name_t):
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self.ui.debug('', "Not creating folder '%s' (repository '%s"
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"') as it would be filtered out on that repository."%
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(dst_name_t, self))
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continue
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# get IMAPFolder and see if the reverse nametrans
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# works fine TODO: getfolder() works only because we
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# succeed in getting inexisting folders which I would
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# like to change. Take care!
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folder = self.getfolder(dst_name_t)
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# apply reverse nametrans to see if we end up with the same name
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newdst_name = folder.getvisiblename().replace(
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src_repo.getsep(), dst_repo.getsep())
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if dst_folder.name != newdst_name:
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raise OfflineImapError("INFINITE FOLDER CREATION DETECTED! "
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"Folder '%s' (repository '%s') would be created as fold"
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"er '%s' (repository '%s'). The latter becomes '%s' in "
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"return, leading to infinite folder creation cycles.\n "
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"SOLUTION: 1) Do set your nametrans rules on both repos"
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"itories so they lead to identical names if applied bac"
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"k and forth. 2) Use folderfilter settings on a reposit"
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"ory to prevent some folders from being created on the "
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"other side." % (dst_folder.name, dst_repo, dst_name_t,
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src_repo, newdst_name),
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OfflineImapError.ERROR.REPO)
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# end sanity check, actually create the folder
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try:
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src_repo.makefolder(dst_name_t)
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src_haschanged = True # Need to refresh list
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except OfflineImapError as e:
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self.ui.error(e, exc_info()[2], "Creating folder %s on "
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"repository %s" % (dst_name_t, src_repo))
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raise
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status_repo.makefolder(dst_name_t.replace(
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src_repo.getsep(), status_repo.getsep()))
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# Find deleted folders.
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# TODO: We don't delete folders right now.
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#Forget old list of cached folders so we get new ones if needed
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if src_haschanged:
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self.forgetfolders()
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if dst_haschanged:
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dst_repo.forgetfolders()
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def startkeepalive(self):
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"""The default implementation will do nothing."""
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pass
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def stopkeepalive(self):
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"""Stop keep alive, but don't bother waiting
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for the threads to terminate."""
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pass
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def getlocalroot(self):
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""" Local root folder for storing messages.
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Will not be set for remote repositories."""
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return None
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