# Base folder support # Copyright (C) 2002-2016 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 os.path import re import time from sys import exc_info from offlineimap import threadutil from offlineimap.ui import getglobalui from offlineimap.error import OfflineImapError import offlineimap.accounts class BaseFolder: __hash__ = None def __init__(self, name, repository): """ :param name: Path & name of folder minus root or reference :param repository: Repository() in which the folder is. """ self.ui = getglobalui() self.messagelist = {} # Save original name for folderfilter operations. self.ffilter_name = name # Top level dir name is always ''. self.root = None self.name = name if not name == self.getsep() else '' self.newmail_hook = None # Only set the newmail_hook if the IMAP folder is named 'INBOX'. if self.name == 'INBOX': self.newmail_hook = repository.newmail_hook self.have_newmail = False self.copy_ignoreUIDs = None # List of UIDs to ignore. self.repository = repository self.visiblename = repository.nametrans(name) # In case the visiblename becomes '.' or '/' (top-level) we use # '' as that is the name that e.g. the Maildir scanning will # return for the top-level dir. if self.visiblename == self.getsep(): self.visiblename = '' self.repoconfname = "Repository " + repository.name self.config = repository.getconfig() # Do we need to use mail timestamp for filename prefix? filename_use_mail_timestamp_global = self.config.getdefaultboolean( "general", "filename_use_mail_timestamp", False) self._filename_use_mail_timestamp = self.config.getdefaultboolean( self.repoconfname, "filename_use_mail_timestamp", filename_use_mail_timestamp_global) self._sync_deletes = self.config.getdefaultboolean( self.repoconfname, "sync_deletes", True) self._dofsync = self.config.getdefaultboolean("general", "fsync", True) # Determine if we're running static or dynamic folder filtering # and check filtering status. self._dynamic_folderfilter = self.config.getdefaultboolean( self.repoconfname, "dynamic_folderfilter", False) self._sync_this = repository.should_sync_folder(self.ffilter_name) if self._dynamic_folderfilter: self.ui.debug('', "Running dynamic folder filtering on '%s'[%s]" % (self.ffilter_name, repository)) elif not self._sync_this: self.ui.debug('', "Filtering out '%s'[%s] due to folderfilter" % (self.ffilter_name, repository)) # Passes for syncmessagesto. self.syncmessagesto_passes = [ self.__syncmessagesto_copy, self.__syncmessagesto_delete, self.__syncmessagesto_flags, ] def getname(self): """Returns name""" return self.name def __str__(self): # FIMXE: remove calls of this. We have getname(). return self.name def __unicode__(self): # NOTE(sheeprine): Implicit call to this by UIBase deletingflags() which # fails if the str is utf-8 return self.name.decode('utf-8') def __enter__(self): """Starts a transaction. This will postpone (guaranteed) saving to disk of all messages saved inside this transaction until its committed.""" pass def __exit__(self, exc_type, exc_val, exc_tb): """Commits a transaction, all messages saved inside this transaction will only now be persisted to disk.""" pass @property def accountname(self): """Account name as string""" return self.repository.accountname @property def sync_this(self): """Should this folder be synced or is it e.g. filtered out?""" if not self._dynamic_folderfilter: return self._sync_this else: return self.repository.should_sync_folder(self.ffilter_name) def dofsync(self): return self._dofsync def suggeststhreads(self): """Returns True if this folder suggests using threads for actions. Only IMAP returns True. This method must honor any CLI or configuration option.""" return False def waitforthread(self): """Implements method that waits for thread to be usable. Should be implemented only for folders that suggest threads.""" raise NotImplementedError def quickchanged(self, statusfolder): """ Runs quick check for folder changes and returns changed status: True -- changed, False -- not changed. :param statusfolder: keeps track of the last known folder state. """ return True def getinstancelimitnamespace(self): """For threading folders, returns the instancelimitname for InstanceLimitedThreads.""" raise NotImplementedError def storesmessages(self): """Should be true for any backend that actually saves message bodies. (Almost all of them). False for the LocalStatus backend. Saves us from having to slurp up messages just for localstatus purposes.""" return 1 def getvisiblename(self): """The nametrans-transposed name of the folder's name.""" return self.visiblename def getexplainedname(self): """Name that shows both real and nametrans-mangled values.""" if self.name == self.visiblename: return self.name else: return "%s [remote name %s]" % (self.visiblename, self.name) def getrepository(self): """Returns the repository object that this folder is within.""" return self.repository def getroot(self): """Returns the root of the folder, in a folder-specific fashion.""" return self.root def getsep(self): """Returns the separator for this folder type.""" return self.sep def getfullname(self): if self.getroot(): return self.getroot() + self.getsep() + self.getname() else: return self.getname() def getfolderbasename(self): """Return base file name of file to store Status/UID info in.""" if not self.name: basename = '.' else: # Avoid directory hierarchies and file names such as '/'. basename = self.name.replace('/', '.') # Replace with literal 'dot' if final path name is '.' as '.' is # an invalid file name. basename = re.sub('(^|\/)\.$', '\\1dot', basename) return basename def check_uidvalidity(self): """Tests if the cached UIDVALIDITY match the real current one If required it saves the UIDVALIDITY value. In this case the function is not threadsafe. So don't attempt to call it from concurrent threads. :returns: Boolean indicating the match. Returns True in case it implicitely saved the UIDVALIDITY.""" if self.get_saveduidvalidity() is not None: return self.get_saveduidvalidity() == self.get_uidvalidity() else: self.save_uidvalidity() return True def _getuidfilename(self): """provides UIDVALIDITY cache filename for class internal purposes.""" return os.path.join(self.repository.getuiddir(), self.getfolderbasename()) def get_saveduidvalidity(self): """Return the previously cached UIDVALIDITY value :returns: UIDVALIDITY as (long) number or None, if None had been saved yet.""" if hasattr(self, '_base_saved_uidvalidity'): return self._base_saved_uidvalidity uidfilename = self._getuidfilename() if not os.path.exists(uidfilename): self._base_saved_uidvalidity = None else: file = open(uidfilename, "rt") self._base_saved_uidvalidity = int(file.readline().strip()) file.close() return self._base_saved_uidvalidity def save_uidvalidity(self): """Save the UIDVALIDITY value of the folder to the cache This function is not threadsafe, so don't attempt to call it from concurrent threads.""" newval = self.get_uidvalidity() uidfilename = self._getuidfilename() with open(uidfilename + ".tmp", "wt") as uidfile: uidfile.write("%d\n" % newval) os.rename(uidfilename + ".tmp", uidfilename) self._base_saved_uidvalidity = newval def get_uidvalidity(self): """Retrieve the current connections UIDVALIDITY value This function needs to be implemented by each Backend :returns: UIDVALIDITY as a (long) number.""" raise NotImplementedError def cachemessagelist(self): """Cache the list of messages. Reads the message list from disk or network and stores it in memory for later use. This list will not be re-read from disk or memory unless this function is called again.""" raise NotImplementedError def ismessagelistempty(self): """Is the list of messages empty.""" if len(list(self.messagelist.keys())) < 1: return True return False def dropmessagelistcache(self): """Empty everythings we know about messages.""" self.messagelist = {} def getmessagelist(self): """Gets the current message list. You must call cachemessagelist() before calling this function!""" return self.messagelist def msglist_item_initializer(self, uid): """Returns value for empty messagelist element with given UID. This function must initialize all fields of messagelist item and must be called every time when one creates new messagelist entry to ensure that all fields that must be present are present.""" raise NotImplementedError def uidexists(self, uid): """Returns True if uid exists.""" return uid in self.getmessagelist() def getmessageuidlist(self): """Gets a list of UIDs. You may have to call cachemessagelist() before calling this function!""" return sorted(self.getmessagelist().keys()) def getmessagecount(self): """Gets the number of messages.""" return len(self.getmessagelist()) def getmessage(self, uid): """Returns the content of the specified message.""" raise NotImplementedError def getmaxage(self): """Return maxage. maxage is allowed to be either an integer or a date of the form YYYY-mm-dd. This returns a time_struct.""" maxagestr = self.config.getdefault("Account %s" % self.accountname, "maxage", None) if maxagestr is None: return None # Is it a number? try: maxage = int(maxagestr) if maxage < 1: raise OfflineImapError("invalid maxage value %d" % maxage, OfflineImapError.ERROR.MESSAGE) return time.gmtime(time.time() - 60 * 60 * 24 * maxage) except ValueError: pass # Maybe it was a date. # Is it a date string? try: date = time.strptime(maxagestr, "%Y-%m-%d") if date[0] < 1900: raise OfflineImapError("maxage led to year %d. " "Abort syncing." % date[0], OfflineImapError.ERROR.MESSAGE) if (time.mktime(date) - time.mktime(time.localtime())) > 0: raise OfflineImapError("maxage led to future date %s. " "Abort syncing." % maxagestr, OfflineImapError.ERROR.MESSAGE) return date except ValueError: raise OfflineImapError("invalid maxage value %s" % maxagestr, OfflineImapError.ERROR.MESSAGE) def getmaxsize(self): return self.config.getdefaultint("Account %s" % self.accountname, "maxsize", None) def getstartdate(self): """ Retrieve the value of the configuration option startdate """ datestr = self.config.getdefault("Repository " + self.repository.name, 'startdate', None) try: if not datestr: return None date = time.strptime(datestr, "%Y-%m-%d") if date[0] < 1900: raise OfflineImapError("startdate led to year %d. " "Abort syncing." % date[0], OfflineImapError.ERROR.MESSAGE) if (time.mktime(date) - time.mktime(time.localtime())) > 0: raise OfflineImapError("startdate led to future date %s. " "Abort syncing." % datestr, OfflineImapError.ERROR.MESSAGE) return date except ValueError: raise OfflineImapError("invalid startdate value %s", OfflineImapError.ERROR.MESSAGE) def get_min_uid_file(self): startuiddir = os.path.join(self.config.getmetadatadir(), 'Repository-' + self.repository.name, 'StartUID') if not os.path.exists(startuiddir): os.mkdir(startuiddir, 0o700) return os.path.join(startuiddir, self.getfolderbasename()) def save_min_uid(self, min_uid): uidfile = self.get_min_uid_file() fd = open(uidfile, 'wt') fd.write(str(min_uid) + "\n") fd.close() def retrieve_min_uid(self): uidfile = self.get_min_uid_file() if not os.path.exists(uidfile): return None try: fd = open(uidfile, 'rt') min_uid = int(fd.readline().strip()) fd.close() return min_uid except: raise IOError("Can't read %s" % uidfile) def savemessage(self, uid, content, flags, rtime): """Writes a new message, with the specified uid. If the uid is < 0: The backend should assign a new uid and return it. In case it cannot assign a new uid, it returns the negative uid passed in WITHOUT saving the message. If the backend CAN assign a new uid, but cannot find out what this UID is (as is the case with some IMAP servers), it returns 0 but DOES save the message. IMAP backend should be the only one that can assign a new uid. If the uid is > 0, the backend should set the uid to this, if it can. If it cannot set the uid to that, it will save it anyway. It will return the uid assigned in any case. Note that savemessage() does not check against dryrun settings, so you need to ensure that savemessage is never called in a dryrun mode.""" raise NotImplementedError def getmessagetime(self, uid): """Return the received time for the specified message.""" raise NotImplementedError def getmessagemtime(self, uid): """Returns the message modification time of the specified message.""" raise NotImplementedError def getmessageflags(self, uid): """Returns the flags for the specified message.""" raise NotImplementedError def getmessagekeywords(self, uid): """Returns the keywords for the specified message.""" raise NotImplementedError def savemessageflags(self, uid, flags): """Sets the specified message's flags to the given set. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" raise NotImplementedError def addmessageflags(self, uid, flags): """Adds the specified flags to the message's flag set. If a given flag is already present, it will not be duplicated. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode. :param flags: A set() of flags""" newflags = self.getmessageflags(uid) | flags self.savemessageflags(uid, newflags) def addmessagesflags(self, uidlist, flags): """Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" for uid in uidlist: if self.uidexists(uid): self.addmessageflags(uid, flags) def deletemessageflags(self, uid, flags): """Removes each flag given from the message's flag set. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode. If a given flag is already removed, no action will be taken for that flag.""" newflags = self.getmessageflags(uid) - flags self.savemessageflags(uid, newflags) def deletemessagesflags(self, uidlist, flags): """ Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" for uid in uidlist: self.deletemessageflags(uid, flags) def getmessagelabels(self, uid): """Returns the labels for the specified message.""" raise NotImplementedError def savemessagelabels(self, uid, labels, ignorelabels=set(), mtime=0): """Sets the specified message's labels to the given set. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" raise NotImplementedError def addmessagelabels(self, uid, labels): """Adds the specified labels to the message's labels set. If a given label is already present, it will not be duplicated. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode. :param labels: A set() of labels""" newlabels = self.getmessagelabels(uid) | labels self.savemessagelabels(uid, newlabels) def addmessageslabels(self, uidlist, labels): """Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" for uid in uidlist: self.addmessagelabels(uid, labels) def deletemessagelabels(self, uid, labels): """Removes each label given from the message's label set. If a given label is already removed, no action will be taken for that label. Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" newlabels = self.getmessagelabels(uid) - labels self.savemessagelabels(uid, newlabels) def deletemessageslabels(self, uidlist, labels): """ Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" for uid in uidlist: self.deletemessagelabels(uid, labels) def addmessageheader(self, content, linebreak, headername, headervalue): """Adds new header to the provided message. WARNING: This function is a bit tricky, and modifying it in the wrong way, may easily lead to data-loss. Arguments: - content: message content, headers and body as a single string - linebreak: string that carries line ending - headername: name of the header to add - headervalue: value of the header to add .. note:: The following documentation will not get displayed correctly after being processed by Sphinx. View the source of this method to read it. This has to deal with strange corner cases where the header is missing or empty. Here are illustrations for all the cases, showing where the header gets inserted and what the end result is. In each illustration, '+' means the added contents. Note that these examples assume LF for linebreak, not CRLF, so '\n' denotes a linebreak and '\n\n' corresponds to the transition between header and body. However if the linebreak parameter is set to '\r\n' then you would have to substitute '\r\n' for '\n' in the below examples. * Case 1: No '\n\n', leading '\n' +X-Flying-Pig-Header: i am here\n \n This is the body\n next line\n * Case 2: '\n\n' at position 0 +X-Flying-Pig-Header: i am here \n \n This is the body\n next line\n * Case 3: No '\n\n', no leading '\n' +X-Flying-Pig-Header: i am here\n +\n This is the body\n next line\n * Case 4: '\n\n' at non-zero position Subject: Something wrong with OI\n From: some@person.at +\nX-Flying-Pig-Header: i am here \n \n This is the body\n next line\n """ self.ui.debug('', 'addmessageheader: called to add %s: %s' % (headername, headervalue)) insertionpoint = content.find(linebreak * 2) if insertionpoint == -1: self.ui.debug('', 'addmessageheader: headers were missing') else: self.ui.debug('', 'addmessageheader: headers end at position %d' % insertionpoint) mark = '==>EOH<==' contextstart = max(0, insertionpoint - 100) contextend = min(len(content), insertionpoint + 100) self.ui.debug('', 'addmessageheader: header/body transition " \ "context (marked by %s): %s%s%s' % ( mark, repr(content[contextstart:insertionpoint]), mark, repr(content[insertionpoint:contextend]) ) ) # Hoping for case #4. prefix = linebreak suffix = '' # Case #2. if insertionpoint == 0: prefix = '' suffix = '' # Either case #1 or #3. elif insertionpoint == -1: prefix = '' suffix = linebreak insertionpoint = 0 # Case #3: when body starts immediately, without preceding '\n' # (this shouldn't happen with proper mail messages, but # we seen many broken ones), we should add '\n' to make # new (and the only header, in this case) to be properly # separated from the message body. if content[0:len(linebreak)] != linebreak: suffix = suffix + linebreak self.ui.debug('', 'addmessageheader: insertionpoint = %d' % insertionpoint) headers = content[0:insertionpoint] self.ui.debug('', 'addmessageheader: headers = %s' % repr(headers)) new_header = prefix + ("%s: %s" % (headername, headervalue)) + suffix self.ui.debug('', 'addmessageheader: new_header = %s' % repr(new_header)) return headers + new_header + content[insertionpoint:] def __find_eoh(self, content): """Searches for the point where mail headers end. Either double '\n', or end of string. Arguments: - content: contents of the message to search in Returns: position of the first non-header byte. """ eoh_cr = content.find('\n\n') if eoh_cr == -1: eoh_cr = len(content) return eoh_cr def getmessageheader(self, content, name): """Return the value of the first occurence of the given header. Header name is case-insensitive. Arguments: - contents: message itself - name: name of the header to be searched Returns: header value or None if no such header was found. """ self.ui.debug('', 'getmessageheader: called to get %s' % name) eoh = self.__find_eoh(content) self.ui.debug('', 'getmessageheader: eoh = %d' % eoh) headers = content[0:eoh] self.ui.debug('', 'getmessageheader: headers = %s' % repr(headers)) m = re.search('^%s:(.*)$' % name, headers, flags=re.MULTILINE | re.IGNORECASE) if m: return m.group(1).strip() else: return None def getmessageheaderlist(self, content, name): """Return a list of values for the given header. Arguments: - contents: message itself - name: name of the header to be searched Returns: list of header values or empty list if no such header was found. """ self.ui.debug('', 'getmessageheaderlist: called to get %s' % name) eoh = self.__find_eoh(content) self.ui.debug('', 'getmessageheaderlist: eoh = %d' % eoh) headers = content[0:eoh] self.ui.debug('', 'getmessageheaderlist: headers = %s' % repr(headers)) return re.findall('^%s:(.*)$' % name, headers, flags=re.MULTILINE | re.IGNORECASE) def deletemessageheaders(self, content, header_list): """Deletes headers in the given list from the message content. Arguments: - content: message itself - header_list: list of headers to be deleted or just the header name We expect our message to have '\n' as line endings.""" if type(header_list) != type([]): header_list = [header_list] self.ui.debug('', 'deletemessageheaders: called to delete %s' % header_list) if not len(header_list): return content eoh = self.__find_eoh(content) self.ui.debug('', 'deletemessageheaders: end of headers = %d' % eoh) headers = content[0:eoh] rest = content[eoh:] self.ui.debug('', 'deletemessageheaders: headers = %s' % repr(headers)) new_headers = [] for h in headers.split('\n'): keep_it = True for trim_h in header_list: if len(h) > len(trim_h) and h[0:len(trim_h) + 1] == (trim_h + ":"): keep_it = False break if keep_it: new_headers.append(h) return '\n'.join(new_headers) + rest def change_message_uid(self, uid, new_uid): """Change the message from existing uid to new_uid. If the backend supports it (IMAP does not). :param new_uid: (optional) If given, the old UID will be changed to a new UID. This allows backends efficient renaming of messages if the UID has changed.""" raise NotImplementedError def deletemessage(self, uid): """Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" raise NotImplementedError def deletemessages(self, uidlist): """Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode.""" for uid in uidlist: self.deletemessage(uid) def copymessageto(self, uid, dstfolder, statusfolder, register=1): """Copies a message from self to dst if needed, updating the status Note that this function does not check against dryrun settings, so you need to ensure that it is never called in a dryrun mode. :param uid: uid of the message to be copied. :param dstfolder: A BaseFolder-derived instance :param statusfolder: A LocalStatusFolder instance :param register: whether we should register a new thread." :returns: Nothing on success, or raises an Exception.""" # Sometimes, it could be the case that if a sync takes awhile, # a message might be deleted from the maildir before it can be # synced to the status cache. This is only a problem with # self.getmessage(). So, don't call self.getmessage unless # really needed. if register: # Output that we start a new thread. self.ui.registerthread(self.repository.account) try: message = None flags = self.getmessageflags(uid) rtime = self.getmessagetime(uid) # If any of the destinations actually stores the message body, # load it up. if dstfolder.storesmessages(): message = self.getmessage(uid) # Succeeded? -> IMAP actually assigned a UID. If newid # remained negative, no server was willing to assign us an # UID. If newid is 0, saving succeeded, but we could not # retrieve the new UID. Ignore message in this case. new_uid = dstfolder.savemessage(uid, message, flags, rtime) if new_uid > 0: if new_uid != uid: # Got new UID, change the local uid to match the new one. self.change_message_uid(uid, new_uid) statusfolder.deletemessage(uid) # Got new UID, change the local uid. # Save uploaded status in the statusfolder. statusfolder.savemessage(new_uid, message, flags, rtime) # Check whether the mail has been seen. if 'S' not in flags: self.have_newmail = True elif new_uid == 0: # Message was stored to dstfolder, but we can't find it's UID # This means we can't link current message to the one created # in IMAP. So we just delete local message and on next run # we'll sync it back # XXX This could cause infinite loop on syncing between two # IMAP servers ... self.deletemessage(uid) else: raise OfflineImapError("Trying to save msg (uid %d) on folder " "%s returned invalid uid %d" % (uid, dstfolder.getvisiblename(), new_uid), OfflineImapError.ERROR.MESSAGE) except KeyboardInterrupt: # Bubble up CTRL-C. raise except OfflineImapError as e: if e.severity > OfflineImapError.ERROR.MESSAGE: raise # Bubble severe errors up. self.ui.error(e, exc_info()[2]) except Exception as e: self.ui.error(e, exc_info()[2], msg="Copying message %s [acc: %s]" % (uid, self.accountname)) raise # Raise on unknown errors, so we can fix those. def __syncmessagesto_copy(self, dstfolder, statusfolder): """Pass1: Copy locally existing messages not on the other side. This will copy messages to dstfolder that exist locally but are not in the statusfolder yet. The strategy is: 1) Look for messages present in self but not in statusfolder. 2) invoke copymessageto() on those which: - If dstfolder doesn't have it yet, add them to dstfolder. - Update statusfolder. This function checks and protects us from action in dryrun mode.""" # We have no new mail yet. self.have_newmail = False threads = [] copylist = [uid for uid in self.getmessageuidlist() if not statusfolder.uidexists(uid)] num_to_copy = len(copylist) # Honor 'copy_ignore_eval' configuration option. if self.copy_ignoreUIDs is not None: for uid in self.copy_ignoreUIDs: if uid in copylist: copylist.remove(uid) self.ui.ignorecopyingmessage(uid, self, dstfolder) if num_to_copy > 0 and self.repository.account.dryrun: self.ui.info("[DRYRUN] Copy {} messages from {}[{}] to {}".format( num_to_copy, self, self.repository, dstfolder.repository) ) return with self: for num, uid in enumerate(copylist): # Bail out on CTRL-C or SIGTERM. if offlineimap.accounts.Account.abort_NOW_signal.is_set(): break if uid == 0: self.ui.warn("Assertion that UID != 0 failed; ignoring message.") continue if uid > 0 and dstfolder.uidexists(uid): # dstfolder has message with that UID already, only update status. flags = self.getmessageflags(uid) rtime = self.getmessagetime(uid) statusfolder.savemessage(uid, None, flags, rtime) continue self.ui.copyingmessage(uid, num + 1, num_to_copy, self, dstfolder) # Exceptions are caught in copymessageto(). if self.suggeststhreads(): self.waitforthread() thread = threadutil.InstanceLimitedThread( self.getinstancelimitnamespace(), target=self.copymessageto, name="Copy message from %s:%s" % (self.repository, self), args=(uid, dstfolder, statusfolder) ) thread.start() threads.append(thread) else: self.copymessageto(uid, dstfolder, statusfolder, register=0) for thread in threads: thread.join() # Block until all "copy" threads are done. # Execute new mail hook if we have new mail. if self.have_newmail: if self.newmail_hook is not None: self.newmail_hook() def __syncmessagesto_delete(self, dstfolder, statusfolder): """Pass 2: Remove locally deleted messages on dst. Get all UIDs in statusfolder but not self. These are messages that were deleted in 'self'. Delete those from dstfolder and statusfolder. This function checks and protects us from action in dryrun mode. """ # The list of messages to delete. If sync of deletions is disabled we # still remove stale entries from statusfolder (neither in local nor # remote). deletelist = [uid for uid in statusfolder.getmessageuidlist() if uid >= 0 and not self.uidexists(uid) and (self._sync_deletes or not dstfolder.uidexists(uid))] if len(deletelist): # Delete in statusfolder first to play safe. In case of abort, we # won't lose message, we will just unneccessarily retransmit some. # Delete messages from statusfolder that were either deleted by the # user, or not being tracked (e.g. because of maxage). if not self.repository.account.dryrun: statusfolder.deletemessages(deletelist) # Filter out untracked messages. deletelist = [uid for uid in deletelist if dstfolder.uidexists(uid)] if len(deletelist): self.ui.deletingmessages(deletelist, [dstfolder]) if not self.repository.account.dryrun: dstfolder.deletemessages(deletelist) def combine_flags_and_keywords(self, uid, dstfolder): """Combine the message's flags and keywords using the mapping for the destination folder.""" # Take a copy of the message flag set, otherwise # __syncmessagesto_flags() will fail because statusflags is actually a # reference to selfflags (which it should not, but I don't have time to # debug THAT). selfflags = set(self.getmessageflags(uid)) try: keywordmap = dstfolder.getrepository().getkeywordmap() if keywordmap is None: return selfflags knownkeywords = set(keywordmap.keys()) selfkeywords = self.getmessagekeywords(uid) if not knownkeywords >= selfkeywords: # Some of the message's keywords are not in the mapping, so # skip them. skipped_keywords = list(selfkeywords - knownkeywords) selfkeywords &= knownkeywords self.ui.warn("Unknown keywords skipped: %s\n" "You may want to change your configuration to include " "those\n" % skipped_keywords) keywordletterset = set([keywordmap[keyw] for keyw in selfkeywords]) # Add the mapped keywords to the list of message flags. selfflags |= keywordletterset except NotImplementedError: pass return selfflags def __syncmessagesto_flags(self, dstfolder, statusfolder): """Pass 3: Flag synchronization. Compare flag mismatches in self with those in statusfolder. If msg has a valid UID and exists on dstfolder (has not e.g. been deleted there), sync the flag change to both dstfolder and statusfolder. This function checks and protects us from action in ryrun mode. """ # For each flag, we store a list of uids to which it should be # added. Then, we can call addmessagesflags() to apply them in # bulk, rather than one call per message. addflaglist = {} delflaglist = {} for uid in self.getmessageuidlist(): # Ignore messages with negative UIDs missed by pass 1 and # don't do anything if the message has been deleted remotely if uid < 0 or not dstfolder.uidexists(uid): continue if statusfolder.uidexists(uid): statusflags = statusfolder.getmessageflags(uid) else: statusflags = set() selfflags = self.combine_flags_and_keywords(uid, dstfolder) addflags = selfflags - statusflags delflags = statusflags - selfflags for flag in addflags: if not flag in addflaglist: addflaglist[flag] = [] addflaglist[flag].append(uid) for flag in delflags: if not flag in delflaglist: delflaglist[flag] = [] delflaglist[flag].append(uid) for flag, uids in list(addflaglist.items()): self.ui.addingflags(uids, flag, dstfolder) if self.repository.account.dryrun: continue # Don't actually add in a dryrun. dstfolder.addmessagesflags(uids, set(flag)) statusfolder.addmessagesflags(uids, set(flag)) for flag, uids in list(delflaglist.items()): self.ui.deletingflags(uids, flag, dstfolder) if self.repository.account.dryrun: continue # Don't actually remove in a dryrun. dstfolder.deletemessagesflags(uids, set(flag)) statusfolder.deletemessagesflags(uids, set(flag)) def syncmessagesto(self, dstfolder, statusfolder): """Syncs messages in this folder to the destination dstfolder. This is the high level entry for syncing messages in one direction. Syncsteps are: Pass1: Copy locally existing messages Copy messages in self, but not statusfolder to dstfolder if not already in dstfolder. dstfolder might assign a new UID (e.g. if uploading to IMAP). Update statusfolder. Pass2: Remove locally deleted messages Get all UIDS in statusfolder but not self. These are messages that were deleted in 'self'. Delete those from dstfolder and statusfolder. After this pass, the message lists should be identical wrt the uids present (except for potential negative uids that couldn't be placed anywhere). Pass3: Synchronize flag changes Compare flag mismatches in self with those in statusfolder. If msg has a valid UID and exists on dstfolder (has not e.g. been deleted there), sync the flag change to both dstfolder and statusfolder. Pass4: Synchronize label changes (Gmail only) Compares label mismatches in self with those in statusfolder. If msg has a valid UID and exists on dstfolder, syncs the labels to both dstfolder and statusfolder. :param dstfolder: Folderinstance to sync the msgs to. :param statusfolder: LocalStatus instance to sync against. """ for action in self.syncmessagesto_passes: # Bail out on CTRL-C or SIGTERM. if offlineimap.accounts.Account.abort_NOW_signal.is_set(): break try: action(dstfolder, statusfolder) except (KeyboardInterrupt): raise except OfflineImapError as e: if e.severity > OfflineImapError.ERROR.FOLDER: raise self.ui.error(e, exc_info()[2], "while syncing %s [account %s]" % (self, self.accountname)) except Exception as e: self.ui.error(e, exc_info()[2], "while syncing %s [account %s]" % (self, self.accountname)) raise # Raise unknown Exceptions so we can fix them. def __eq__(self, other): """Comparisons work either on string comparing folder names or on the same instance. MailDirFolder('foo') == 'foo' --> True a = MailDirFolder('foo'); a == b --> True MailDirFolder('foo') == 'moo' --> False MailDirFolder('foo') == IMAPFolder('foo') --> False MailDirFolder('foo') == MaildirFolder('foo') --> False """ if isinstance(other, str): return other == self.name return id(self) == id(other) def __ne__(self, other): return not self.__eq__(other)