736 lines
20 KiB
Python
736 lines
20 KiB
Python
# MH interface -- purely object-oriented (well, almost)
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#
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# Executive summary:
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#
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# import mhlib
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#
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# mh = mhlib.MH() # use default mailbox directory and profile
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# mh = mhlib.MH(mailbox) # override mailbox location (default from profile)
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# mh = mhlib.MH(mailbox, profile) # override mailbox and profile
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#
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# mh.error(format, ...) # print error message -- can be overridden
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# s = mh.getprofile(key) # profile entry (None if not set)
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# path = mh.getpath() # mailbox pathname
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# name = mh.getcontext() # name of current folder
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#
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# list = mh.listfolders() # names of top-level folders
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# list = mh.listallfolders() # names of all folders, including subfolders
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# list = mh.listsubfolders(name) # direct subfolders of given folder
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# list = mh.listallsubfolders(name) # all subfolders of given folder
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#
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# mh.makefolder(name) # create new folder
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# mh.deletefolder(name) # delete folder -- must have no subfolders
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#
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# f = mh.openfolder(name) # new open folder object
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#
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# f.error(format, ...) # same as mh.error(format, ...)
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# path = f.getfullname() # folder's full pathname
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# path = f.getsequencesfilename() # full pathname of folder's sequences file
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# path = f.getmessagefilename(n) # full pathname of message n in folder
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#
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# list = f.listmessages() # list of messages in folder (as numbers)
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# n = f.getcurrent() # get current message
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# f.setcurrent(n) # set current message
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#
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# dict = f.getsequences() # dictionary of sequences in folder {name: list}
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# f.putsequences(dict) # write sequences back to folder
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#
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# m = f.openmessage(n) # new open message object (costs a file descriptor)
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# s = m.getheadertext() # text of message's headers
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# s = m.getheadertext(pred) # text of message's headers, filtered by pred
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# s = m.getbodytext() # text of message's body, decoded
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# s = m.getbodytext(0) # text of message's body, not decoded
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#
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# XXX To do, functionality:
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# - remove, refile messages
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# - annotate messages
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# - create, send messages
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#
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# XXX To do, orgaanization:
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# - move IntSet to separate file
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# - move most Message functionality to module mimetools
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# Customizable defaults
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MH_PROFILE = '~/.mh_profile'
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PATH = '~/Mail'
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MH_SEQUENCES = '.mh_sequences'
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FOLDER_PROTECT = 0700
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# Imported modules
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import os
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from stat import ST_NLINK
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import regex
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import string
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import mimetools
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import multifile
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# Exported constants
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Error = 'mhlib.Error'
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# Class representing a particular collection of folders.
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# Optional constructor arguments are the pathname for the directory
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# containing the collection, and the MH profile to use.
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# If either is omitted or empty a default is used; the default
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# directory is taken from the MH profile if it is specified there.
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class MH:
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# Constructor
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def __init__(self, path = None, profile = None):
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if not profile: profile = MH_PROFILE
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self.profile = os.path.expanduser(profile)
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if not path: path = self.getprofile('Path')
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if not path: path = PATH
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if not os.path.isabs(path) and path[0] != '~':
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path = os.path.join('~', path)
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path = os.path.expanduser(path)
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if not os.path.isdir(path): raise Error, 'MH() path not found'
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self.path = path
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# String representation
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def __repr__(self):
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return 'MH(%s, %s)' % (`self.path`, `self.profile`)
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# Routine to print an error. May be overridden by a derived class
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def error(self, msg, *args):
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sys.stderr.write('MH error: %\n' % (msg % args))
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# Return a profile entry, None if not found
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def getprofile(self, key):
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return pickline(self.profile, key)
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# Return the path (the name of the collection's directory)
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def getpath(self):
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return self.path
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# Return the name of the current folder
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def getcontext(self):
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context = pickline(os.path.join(self.getpath(), 'context'),
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'Current-Folder')
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if not context: context = 'inbox'
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return context
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# Return the names of the top-level folders
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def listfolders(self):
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folders = []
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path = self.getpath()
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for name in os.listdir(path):
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if name in (os.curdir, os.pardir): continue
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fullname = os.path.join(path, name)
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if os.path.isdir(fullname):
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folders.append(name)
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folders.sort()
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return folders
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# Return the names of the subfolders in a given folder
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# (prefixed with the given folder name)
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def listsubfolders(self, name):
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fullname = os.path.join(self.path, name)
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# Get the link count so we can avoid listing folders
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# that have no subfolders.
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st = os.stat(fullname)
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nlinks = st[ST_NLINK]
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if nlinks <= 2:
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return []
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subfolders = []
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subnames = os.listdir(fullname)
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for subname in subnames:
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if subname in (os.curdir, os.pardir): continue
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fullsubname = os.path.join(fullname, subname)
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if os.path.isdir(fullsubname):
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name_subname = os.path.join(name, subname)
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subfolders.append(name_subname)
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# Stop looking for subfolders when
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# we've seen them all
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nlinks = nlinks - 1
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if nlinks <= 2:
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break
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subfolders.sort()
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return subfolders
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# Return the names of all folders, including subfolders, recursively
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def listallfolders(self):
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return self.listallsubfolders('')
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# Return the names of subfolders in a given folder, recursively
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def listallsubfolders(self, name):
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fullname = os.path.join(self.path, name)
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# Get the link count so we can avoid listing folders
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# that have no subfolders.
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st = os.stat(fullname)
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nlinks = st[ST_NLINK]
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if nlinks <= 2:
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return []
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subfolders = []
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subnames = os.listdir(fullname)
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for subname in subnames:
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if subname in (os.curdir, os.pardir): continue
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if subname[0] == ',' or isnumeric(subname): continue
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fullsubname = os.path.join(fullname, subname)
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if os.path.isdir(fullsubname):
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name_subname = os.path.join(name, subname)
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subfolders.append(name_subname)
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if not os.path.islink(fullsubname):
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subsubfolders = self.listallsubfolders(
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name_subname)
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subfolders = subfolders + subsubfolders
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# Stop looking for subfolders when
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# we've seen them all
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nlinks = nlinks - 1
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if nlinks <= 2:
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break
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subfolders.sort()
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return subfolders
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# Return a new Folder object for the named folder
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def openfolder(self, name):
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return Folder(self, name)
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# Create a new folder. This raises os.error if the folder
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# cannot be created
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def makefolder(self, name):
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protect = pickline(self.profile, 'Folder-Protect')
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if protect and isnumeric(protect):
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mode = eval('0' + protect)
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else:
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mode = FOLDER_PROTECT
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os.mkdir(os.path.join(self.getpath(), name), mode)
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# Delete a folder. This removes files in the folder but not
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# subdirectories. If deleting the folder itself fails it
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# raises os.error
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def deletefolder(self, name):
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fullname = os.path.join(self.getpath(), name)
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for subname in os.listdir(fullname):
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if subname in (os.curdir, os.pardir): continue
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fullsubname = os.path.join(fullname, subname)
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try:
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os.unlink(fullsubname)
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except os.error:
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self.error('%s not deleted, continuing...' %
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fullsubname)
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os.rmdir(fullname)
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# Class representing a particular folder
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numericprog = regex.compile('[1-9][0-9]*')
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def isnumeric(str):
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return numericprog.match(str) == len(str)
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class Folder:
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# Constructor
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def __init__(self, mh, name):
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self.mh = mh
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self.name = name
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if not os.path.isdir(self.getfullname()):
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raise Error, 'no folder %s' % name
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# String representation
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def __repr__(self):
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return 'Folder(%s, %s)' % (`self.mh`, `self.name`)
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# Error message handler
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def error(self, *args):
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apply(self.mh.error, args)
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# Return the full pathname of the folder
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def getfullname(self):
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return os.path.join(self.mh.path, self.name)
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# Return the full pathname of the folder's sequences file
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def getsequencesfilename(self):
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return os.path.join(self.getfullname(), MH_SEQUENCES)
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# Return the full pathname of a message in the folder
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def getmessagefilename(self, n):
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return os.path.join(self.getfullname(), str(n))
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# Return list of direct subfolders
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def listsubfolders(self):
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return self.mh.listsubfolders(self.name)
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# Return list of all subfolders
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def listallsubfolders(self):
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return self.mh.listallsubfolders(self.name)
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# Return the list of messages currently present in the folder.
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# As a side effect, set self.last to the last message (or 0)
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def listmessages(self):
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messages = []
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for name in os.listdir(self.getfullname()):
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if isnumeric(name):
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messages.append(eval(name))
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messages.sort()
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if messages:
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self.last = max(messages)
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else:
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self.last = 0
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return messages
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# Return the set of sequences for the folder
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def getsequences(self):
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sequences = {}
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fullname = self.getsequencesfilename()
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try:
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f = open(fullname, 'r')
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except IOError:
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return sequences
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while 1:
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line = f.readline()
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if not line: break
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fields = string.splitfields(line, ':')
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if len(fields) <> 2:
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self.error('bad sequence in %s: %s' %
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(fullname, string.strip(line)))
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key = string.strip(fields[0])
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value = IntSet(string.strip(fields[1]), ' ').tolist()
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sequences[key] = value
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return sequences
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# Write the set of sequences back to the folder
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def putsequences(self, sequences):
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fullname = self.getsequencesfilename()
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f = open(fullname, 'w')
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for key in sequences.keys():
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s = IntSet('', ' ')
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s.fromlist(sequences[key])
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f.write('%s: %s\n' % (key, s.tostring()))
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# Return the current message. Raise KeyError when there is none
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def getcurrent(self):
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return min(self.getsequences()['cur'])
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# Set the current message
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def setcurrent(self, n):
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updateline(self.getsequencesfilename(), 'cur', str(n), 0)
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# Open a message -- returns a mimetools.Message object
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def openmessage(self, n):
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path = self.getmessagefilename(n)
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return Message(self, n)
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# Remove one or more messages -- may raise os.error
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def removemessages(self, list):
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errors = []
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deleted = []
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for n in list:
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path = self.getmessagefilename(n)
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commapath = self.getmessagefilename(',' + str(n))
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try:
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os.unlink(commapath)
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except os.error:
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pass
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try:
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os.rename(path, commapath)
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except os.error, msg:
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errors.append(msg)
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else:
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deleted.append(n)
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if deleted:
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self.removefromallsequences(deleted)
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if errors:
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if len(errors) == 1:
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raise os.error, errors[0]
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else:
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raise os.error, ('multiple errors:', errors)
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# Refile one or more messages -- may raise os.error.
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# 'tofolder' is an open folder object
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def refilemessages(self, list, tofolder):
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errors = []
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refiled = []
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for n in list:
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ton = tofolder.getlast() + 1
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path = self.getmessagefilename(n)
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topath = tofolder.getmessagefilename(ton)
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try:
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os.rename(path, topath)
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# XXX What if it's on a different filesystem?
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except os.error, msg:
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errors.append(msg)
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else:
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tofolder.setlast(ton)
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refiled.append(n)
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if refiled:
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self.removefromallsequences(refiled)
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if errors:
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if len(errors) == 1:
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raise os.error, errors[0]
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else:
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raise os.error, ('multiple errors:', errors)
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# Remove one or more messages from all sequeuces (including last)
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def removefromallsequences(self, list):
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if hasattr(self, 'last') and self.last in list:
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del self.last
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sequences = self.getsequences()
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changed = 0
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for name, seq in sequences.items():
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for n in list:
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if n in seq:
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seq.remove(n)
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changed = 1
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if not seq:
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del sequences[name]
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if changed:
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self.putsequences(sequences)
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# Return the last message number
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def getlast(self):
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if not hasattr(self, 'last'):
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messages = self.listmessages()
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return self.last
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# Set the last message number
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def setlast(self, last):
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if last is None:
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if hasattr(self, 'last'):
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del self.last
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else:
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self.last = last
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class Message(mimetools.Message):
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# Constructor
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def __init__(self, f, n, fp = None):
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self.folder = f
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self.number = n
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if not fp:
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path = f.getmessagefilename(n)
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fp = open(path, 'r')
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mimetools.Message.__init__(self, fp)
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# String representation
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def __repr__(self):
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return 'Message(%s, %s)' % (repr(self.folder), self.number)
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# Return the message's header text as a string. If an
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# argument is specified, it is used as a filter predicate to
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# decide which headers to return (its argument is the header
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# name converted to lower case).
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def getheadertext(self, pred = None):
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if not pred:
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return string.joinfields(self.headers, '')
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headers = []
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hit = 0
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for line in self.headers:
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if line[0] not in string.whitespace:
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i = string.find(line, ':')
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if i > 0:
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hit = pred(string.lower(line[:i]))
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if hit: headers.append(line)
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return string.joinfields(headers, '')
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# Return the message's body text as string. This undoes a
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# Content-Transfer-Encoding, but does not interpret other MIME
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# features (e.g. multipart messages). To suppress to
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# decoding, pass a 0 as argument
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def getbodytext(self, decode = 1):
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self.fp.seek(self.startofbody)
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encoding = self.getencoding()
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if not decode or encoding in ('7bit', '8bit', 'binary'):
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return self.fp.read()
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from StringIO import StringIO
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output = StringIO()
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mimetools.decode(self.fp, output, encoding)
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return output.getvalue()
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# Only for multipart messages: return the message's body as a
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# list of SubMessage objects. Each submessage object behaves
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# (almost) as a Message object.
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def getbodyparts(self):
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if self.getmaintype() != 'multipart':
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raise Error, \
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'Content-Type is not multipart/*'
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bdry = self.getparam('boundary')
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if not bdry:
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raise Error, 'multipart/* without boundary param'
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self.fp.seek(self.startofbody)
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mf = multifile.MultiFile(self.fp)
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mf.push(bdry)
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parts = []
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while mf.next():
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n = str(self.number) + '.' + `1 + len(parts)`
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part = SubMessage(self.folder, n, mf)
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parts.append(part)
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mf.pop()
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return parts
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# Return body, either a string or a list of messages
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def getbody(self):
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if self.getmaintype() == 'multipart':
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return self.getbodyparts()
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else:
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return self.getbodytext()
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|
|
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class SubMessage(Message):
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|
# Constructor
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|
def __init__(self, f, n, fp):
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Message.__init__(self, f, n, fp)
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if self.getmaintype() == 'multipart':
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self.body = Message.getbodyparts(self)
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else:
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self.body = Message.getbodytext(self)
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# XXX If this is big, should remember file pointers
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# String representation
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def __repr__(self):
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f, n, fp = self.folder, self.number, self.fp
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return 'SubMessage(%s, %s, %s)' % (f, n, fp)
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def getbodytext(self):
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if type(self.body) == type(''):
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return self.body
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def getbodyparts(self):
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if type(self.body) == type([]):
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return self.body
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|
|
def getbody(self):
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return self.body
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|
|
|
|
# Class implementing sets of integers.
|
|
#
|
|
# This is an efficient representation for sets consisting of several
|
|
# continuous ranges, e.g. 1-100,200-400,402-1000 is represented
|
|
# internally as a list of three pairs: [(1,100), (200,400),
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# (402,1000)]. The internal representation is always kept normalized.
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|
#
|
|
# The constructor has up to three arguments:
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# - the string used to initialize the set (default ''),
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# - the separator between ranges (default ',')
|
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# - the separator between begin and end of a range (default '-')
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|
# The separators may be regular expressions and should be different.
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#
|
|
# The tostring() function yields a string that can be passed to another
|
|
# IntSet constructor; __repr__() is a valid IntSet constructor itself.
|
|
#
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# XXX The default begin/end separator means that negative numbers are
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# not supported very well.
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#
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# XXX There are currently no operations to remove set elements.
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class IntSet:
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def __init__(self, data = None, sep = ',', rng = '-'):
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self.pairs = []
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self.sep = sep
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self.rng = rng
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if data: self.fromstring(data)
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def reset(self):
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self.pairs = []
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def __cmp__(self, other):
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return cmp(self.pairs, other.pairs)
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def __hash__(self):
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return hash(self.pairs)
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def __repr__(self):
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return 'IntSet(%s, %s, %s)' % (`self.tostring()`,
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`self.sep`, `self.rng`)
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def normalize(self):
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self.pairs.sort()
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i = 1
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while i < len(self.pairs):
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alo, ahi = self.pairs[i-1]
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blo, bhi = self.pairs[i]
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if ahi >= blo-1:
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self.pairs[i-1:i+1] = [
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(alo, max(ahi, bhi))]
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else:
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i = i+1
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def tostring(self):
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s = ''
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for lo, hi in self.pairs:
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if lo == hi: t = `lo`
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else: t = `lo` + self.rng + `hi`
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if s: s = s + (self.sep + t)
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else: s = t
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return s
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def tolist(self):
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l = []
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for lo, hi in self.pairs:
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m = range(lo, hi+1)
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l = l + m
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return l
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def fromlist(self, list):
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for i in list:
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self.append(i)
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def clone(self):
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new = IntSet()
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new.pairs = self.pairs[:]
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return new
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def min(self):
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return self.pairs[0][0]
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def max(self):
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return self.pairs[-1][-1]
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def contains(self, x):
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for lo, hi in self.pairs:
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if lo <= x <= hi: return 1
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return 0
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def append(self, x):
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for i in range(len(self.pairs)):
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lo, hi = self.pairs[i]
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if x < lo: # Need to insert before
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if x+1 == lo:
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self.pairs[i] = (x, hi)
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else:
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self.pairs.insert(i, (x, x))
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if i > 0 and x-1 == self.pairs[i-1][1]:
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# Merge with previous
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self.pairs[i-1:i+1] = [
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(self.pairs[i-1][0],
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self.pairs[i][1])
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]
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return
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if x <= hi: # Already in set
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return
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i = len(self.pairs) - 1
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if i >= 0:
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lo, hi = self.pairs[i]
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if x-1 == hi:
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self.pairs[i] = lo, x
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return
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self.pairs.append((x, x))
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def addpair(self, xlo, xhi):
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if xlo > xhi: return
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self.pairs.append((xlo, xhi))
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self.normalize()
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def fromstring(self, data):
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import string, regsub
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new = []
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for part in regsub.split(data, self.sep):
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list = []
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for subp in regsub.split(part, self.rng):
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s = string.strip(subp)
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list.append(string.atoi(s))
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if len(list) == 1:
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new.append((list[0], list[0]))
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elif len(list) == 2 and list[0] <= list[1]:
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new.append((list[0], list[1]))
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else:
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raise ValueError, 'bad data passed to IntSet'
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self.pairs = self.pairs + new
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self.normalize()
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# Subroutines to read/write entries in .mh_profile and .mh_sequences
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def pickline(file, key, casefold = 1):
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try:
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f = open(file, 'r')
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except IOError:
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return None
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pat = key + ':'
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if casefold:
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prog = regex.compile(pat, regex.casefold)
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else:
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prog = regex.compile(pat)
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while 1:
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line = f.readline()
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if not line: break
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if prog.match(line) == len(line):
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text = line[len(key)+1:]
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while 1:
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line = f.readline()
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if not line or \
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line[0] not in string.whitespace:
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break
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text = text + line
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return string.strip(text)
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return None
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def updateline(file, key, value, casefold = 1):
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try:
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f = open(file, 'r')
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lines = f.readlines()
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f.close()
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except IOError:
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lines = []
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pat = key + ':\(.*\)\n'
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if casefold:
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prog = regex.compile(pat, regex.casefold)
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else:
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prog = regex.compile(pat)
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if value is None:
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newline = None
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else:
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newline = '%s: %s' % (key, value)
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for i in range(len(lines)):
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line = lines[i]
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if prog.match(line) == len(line):
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if newline is None:
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del lines[i]
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else:
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lines[i] = newline
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break
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else:
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if newline is not None:
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lines.append(newline)
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f = open(tempfile, 'w')
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for line in lines:
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f.write(line)
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f.close()
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# Test program
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def test():
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global mh, f
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os.system('rm -rf $HOME/Mail/@test')
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mh = MH()
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def do(s): print s; print eval(s)
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do('mh.listfolders()')
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do('mh.listallfolders()')
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testfolders = ['@test', '@test/test1', '@test/test2',
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'@test/test1/test11', '@test/test1/test12',
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'@test/test1/test11/test111']
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for t in testfolders: do('mh.makefolder(%s)' % `t`)
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do('mh.listsubfolders(\'@test\')')
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do('mh.listallsubfolders(\'@test\')')
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f = mh.openfolder('@test')
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do('f.listsubfolders()')
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do('f.listallsubfolders()')
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do('f.getsequences()')
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seqs = f.getsequences()
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seqs['foo'] = IntSet('1-10 12-20', ' ').tolist()
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print seqs
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f.putsequences(seqs)
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do('f.getsequences()')
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testfolders.reverse()
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for t in testfolders: do('mh.deletefolder(%s)' % `t`)
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do('mh.getcontext()')
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context = mh.getcontext()
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f = mh.openfolder(context)
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do('f.listmessages()')
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do('f.getcurrent()')
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if __name__ == '__main__':
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test()
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