""" Base repository support Copyright (C) 2002-2017 John Goerzen & contributors This program 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 2 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """ import re import os.path from sys import exc_info from offlineimap import CustomConfig from offlineimap.ui import getglobalui from offlineimap.error import OfflineImapError class BaseRepository(CustomConfig.ConfigHelperMixin): """ Base Class for Repository """ def __init__(self, reposname, account): self.ui = getglobalui() self.account = account self.config = account.getconfig() self.name = reposname self.localeval = account.getlocaleval() self._accountname = self.account.getname() self._readonly = self.getconfboolean('readonly', False) self.uiddir = os.path.join(self.config.getmetadatadir(), 'Repository-' + self.name) if not os.path.exists(self.uiddir): os.mkdir(self.uiddir, 0o700) self.mapdir = os.path.join(self.uiddir, 'UIDMapping') if not os.path.exists(self.mapdir): os.mkdir(self.mapdir, 0o700) # FIXME: self.uiddir variable name is lying about itself. self.uiddir = os.path.join(self.uiddir, 'FolderValidity') if not os.path.exists(self.uiddir): os.mkdir(self.uiddir, 0o700) self.nametrans = lambda foldername: foldername self.folderfilter = lambda foldername: 1 self.folderincludes = [] self.foldersort = None self.newmail_hook = None if self.config.has_option(self.getsection(), 'nametrans'): self.nametrans = self.localeval.eval( self.getconf('nametrans'), {'re': re}) if self.config.has_option(self.getsection(), 'folderfilter'): self.folderfilter = self.localeval.eval( self.getconf('folderfilter'), {'re': re}) if self.config.has_option(self.getsection(), 'folderincludes'): self.folderincludes = self.localeval.eval( self.getconf('folderincludes'), {'re': re}) if self.config.has_option(self.getsection(), 'foldersort'): self.foldersort = self.localeval.eval( self.getconf('foldersort'), {'re': re}) def restore_atime(self): """Sets folders' atime back to their values after a sync Controlled by the 'restoreatime' config parameter (default False), applies only to local Maildir mailboxes and does nothing on all other repository types.""" def connect(self): """Establish a connection to the remote, if necessary. This exists so that IMAP connections can all be established up front, gathering passwords as needed. It was added in order to support the error recovery -- we need to connect first outside of the error trap in order to validate the password, and that's the point of this function.""" def holdordropconnections(self): """ Hold the drop connections functions. Returns: None """ def dropconnections(self): """ Drop connections functions. Returns: None """ def getaccount(self): """ This patch returns the account Returns: The account """ return self.account def getname(self): """ Get the repository name Returns: String with the repository name """ return self.name def __str__(self): return self.name @property def accountname(self): """Account name as string""" return self._accountname def getuiddir(self): """ The FolderValidity directory Returns: The FolderValidity directory """ return self.uiddir def getmapdir(self): """ Get the map dir (UIDMapping) Returns: The UIDMapping directory """ return self.mapdir # Interface from CustomConfig.ConfigHelperMixin def getsection(self): return 'Repository ' + self.name # Interface from CustomConfig.ConfigHelperMixin def getconfig(self): return self.config @property def readonly(self): """Is the repository readonly?""" return self._readonly def getlocaleval(self): """ Get the account local eval. Returns: LocalEval class for account. """ return self.account.getlocaleval() def getfolders(self): """Returns a list of ALL folders on this server.""" return [] def forgetfolders(self): """Forgets the cached list of folders, if any. Useful to run after a sync run.""" def getsep(self): """ Get the separator. This function is not implemented. Returns: None """ raise NotImplementedError def getkeywordmap(self): """ Get the keyword map. This function is not implemented. Returns: None """ raise NotImplementedError def should_sync_folder(self, fname): """Should this folder be synced?""" return fname in self.folderincludes or self.folderfilter(fname) def should_create_folders(self): """Is folder creation enabled on this repository? It is disabled by either setting the whole repository 'readonly' or by using the 'createfolders' setting.""" return (not self._readonly) and self.getconfboolean('createfolders', True) def makefolder(self, foldername): """ Create a new folder. This function is not implemented Args: foldername: Folder to create Returns: None """ raise NotImplementedError def deletefolder(self, foldername): """ Remove the selected folder. This function is not implemented Args: foldername: Folder to delete Returns: None """ raise NotImplementedError def getfolder(self, foldername, decode=True): """Get the folder for this repo. WARNING: the signature changes whether it's remote or local: - remote types have the decode arg - local types don't have the decode arg """ raise NotImplementedError def sync_folder_structure(self, local_repo, status_repo): """Sync the folders structure. It does NOT sync the contents of those folders. nametrans rules in both directions will be honored Configuring nametrans on BOTH repositories could lead to infinite folder creation cycles.""" if not self.should_create_folders()\ and not local_repo.should_create_folders(): # Quick exit if no folder creation is enabled on either side. return remote_repo = self remote_hash, local_hash = {}, {} for folder in remote_repo.getfolders(): remote_hash[folder.getname()] = folder for folder in local_repo.getfolders(): local_hash[folder.getname()] = folder # Create new folders from remote to local. for remote_name, remote_folder in list(remote_hash.items()): # Don't create on local_repo, if it is readonly. if not local_repo.should_create_folders(): break # Apply remote nametrans and fix serparator. local_name = remote_folder.getvisiblename().replace( remote_repo.getsep(), local_repo.getsep()) if remote_folder.sync_this \ and local_name not in list(local_hash.keys()): try: local_repo.makefolder(local_name) # Need to refresh list. local_repo.forgetfolders() except OfflineImapError as e: self.ui.error(e, exc_info()[2], "Creating folder %s on repository %s" % (local_name, local_repo)) raise status_repo.makefolder(local_name.replace( local_repo.getsep(), status_repo.getsep())) # Create new folders from local to remote. for local_name, local_folder in list(local_hash.items()): if not remote_repo.should_create_folders(): # Don't create missing folder on readonly repo. break # Apply reverse nametrans and fix serparator. remote_name = local_folder.getvisiblename().replace( local_repo.getsep(), remote_repo.getsep()) if local_folder.sync_this \ and remote_name not in list(remote_hash.keys()): # Would the remote filter out the new folder name? In this case # don't create it. if not remote_repo.should_sync_folder(remote_name): msg = "Not creating folder '%s' (repository '%s') " \ "as it would be filtered out on that repository." % \ (remote_name, self) self.ui.debug('', msg) continue # nametrans sanity check! Does remote nametrans lead to the # original local name? # # Apply remote nametrans to see if we end up with the same # name. We have: # - remote_name: local_name -> reverse nametrans + separator # We want local_name == loop_name from: # - remote_name -> remote (nametrans + separator) -> loop_name # # Get IMAPFolder and see if the reverse nametrans works fine. # TODO: getfolder() works only because we succeed in getting # inexisting folders which I would like to change. Take care! tmp_remotefolder = remote_repo.getfolder(remote_name, decode=False) loop_name = tmp_remotefolder.getvisiblename().replace( remote_repo.getsep(), local_repo.getsep()) if local_name != loop_name: msg = "INFINITE FOLDER CREATION DETECTED! "\ "Folder '%s' (repository '%s') would be created as " \ "folder '%s' (repository '%s'). The latter " \ "becomes '%s' in return, leading to infinite " \ "folder creation cycles.\n "\ "SOLUTION: 1) Do set your nametrans rules on both " \ "repositories so they lead to identical names if " \ "applied back and forth. " \ "2) Use folderfilter settings on a repository to " \ "prevent some folders from being created on the " \ "other side." % \ (local_folder.getname(), local_repo, remote_name, remote_repo, loop_name) raise OfflineImapError(msg, OfflineImapError.ERROR.REPO) # End sanity check, actually create the folder. try: remote_repo.makefolder(remote_name) # Need to refresh list. self.forgetfolders() except OfflineImapError as e: msg = "Creating folder %s on repository %s" % \ (remote_name, remote_repo) self.ui.error(e, exc_info()[2], msg) raise status_repo.makefolder(local_name.replace( local_repo.getsep(), status_repo.getsep())) # Find deleted folders. # TODO: We don't delete folders right now. return None def startkeepalive(self): """The default implementation will do nothing.""" def stopkeepalive(self): """Stop keep alive, but don't bother waiting for the threads to terminate.""" def getlocalroot(self): """ Local root folder for storing messages. Will not be set for remote repositories.""" return None