wikiq

   1 #!/usr/bin/env python3
   2
   3 # original wikiq headers are: title articleid revid date_time anon
   4 # editor editor_id minor text_size text_entropy text_md5 reversion
   5 # additions_size deletions_size
   6
   7 import argparse
   8 import sys
   9 import os, os.path
  10 import re
  11
  12 from subprocess import Popen, PIPE
  13 from collections import deque
  14 from hashlib import sha1
  15
  16 from mwxml import Dump
  17
  18 from deltas.tokenizers import wikitext_split
  19 import mwpersistence
  20 import mwreverts
  21 from urllib.parse import quote
  22 TO_ENCODE = ('title', 'editor')
  23 PERSISTENCE_RADIUS=7
  24 from deltas import SequenceMatcher
  25 from deltas import SegmentMatcher
  26
  27 class PersistMethod:
  28     none = 0
  29     sequence = 1
  30     segment = 2
  31     legacy = 3
  32
  33 def calculate_persistence(tokens_added):
  34     return(sum([(len(x.revisions)-1) for x in tokens_added]),
  35            len(tokens_added))
  36
  37 def matchmaker(rev_data, regular_expression, scanner, rev): #rev_data,self.regex,self.scanner, rev
  38     for location in scanner: #presumably 'comment' 'text' 'comment text' made into a list by args
  39         if location == "comment":
  40             matching_string = rev.comment
  41         elif location == "text":
  42             matching_string = rev.text
  43         else:
  44             sys.exit("regex scanner location must be 'comment' or 'text'.")
  45
  46         if (re.search(regular_expression, matching_string) is not None): # we know that there is a match somewhere
  47             m = re.finditer(regular_expression, matching_string) # all our matchObjects in a list
  48             blob=""
  49             for result in m:
  50                 blob = blob + "," + result.group(0)
  51             # columns we want
  52             rev_data['matches'] = blob #### the list of matchObjects. gleaned in post-processing
  53         else:
  54             rev_data['matches'] = None
  55
  56     return rev_data
  57
  58
  59
  60 class WikiqIterator():
  61     def __init__(self, fh, collapse_user=False):
  62         self.fh = fh
  63         self.collapse_user = collapse_user
  64         self.mwiterator = Dump.from_file(self.fh)
  65         self.namespace_map = { ns.id : ns.name for ns in
  66                                self.mwiterator.site_info.namespaces }
  67         self.__pages = self.load_pages()
  68
  69     def load_pages(self):
  70         for page in self.mwiterator:
  71             yield WikiqPage(page,
  72                             namespace_map = self.namespace_map,
  73                             collapse_user=self.collapse_user)
  74
  75     def __iter__(self):
  76         return self.__pages
  77
  78     def __next__(self):
  79         return next(self._pages)
  80
  81 class WikiqPage():
  82     __slots__ = ('id', 'title', 'namespace', 'redirect',
  83                  'restrictions', 'mwpage', '__revisions',
  84                  'collapse_user')
  85
  86     def __init__(self, page, namespace_map, collapse_user=False):
  87         self.id = page.id
  88         self.namespace = page.namespace
  89         # following mwxml, we assume namespace 0 in cases where
  90         # page.namespace is inconsistent with namespace_map
  91         if page.namespace not in namespace_map:
  92             self.title = page.title
  93             page.namespace = 0
  94         if page.namespace != 0:
  95             self.title = ':'.join([namespace_map[page.namespace], page.title])
  96         else:
  97             self.title = page.title
  98         self.restrictions = page.restrictions
  99         self.collapse_user = collapse_user
 100         self.mwpage = page
 101         self.__revisions = self.rev_list()
 102
 103     def rev_list(self):
 104         # Outline for how we want to handle collapse_user=True
 105         # iteration   rev.user   prev_rev.user   add prev_rev?
 106         #         0          A            None           Never
 107         #         1          A               A           False
 108         #         2          B               A            True
 109         #         3          A               B            True
 110         #         4          A               A           False
 111         # Post-loop                          A          Always
 112         for i, rev in enumerate(self.mwpage):
 113             # never yield the first time
 114             if i == 0:
 115                 if self.collapse_user:
 116                     collapsed_revs = 1
 117                     rev.collapsed_revs = collapsed_revs
 118
 119             else:
 120                 if self.collapse_user:
 121                     # yield if this is the last edit in a seq by a user and reset
 122                     # also yield if we do know who the user is
 123
 124                     if rev.deleted.user or prev_rev.deleted.user:
 125                         yield prev_rev
 126                         collapsed_revs = 1
 127                         rev.collapsed_revs = collapsed_revs
 128
 129                     elif not rev.user.text == prev_rev.user.text:
 130                         yield prev_rev
 131                         collapsed_revs = 1
 132                         rev.collapsed_revs = collapsed_revs
 133                     # otherwise, add one to the counter
 134                     else:
 135                         collapsed_revs += 1
 136                         rev.collapsed_revs = collapsed_revs
 137                 # if collapse_user is false, we always yield
 138                 else:
 139                     yield prev_rev
 140
 141             prev_rev = rev
 142
 143         # also yield the final time
 144         yield prev_rev
 145
 146     def __iter__(self):
 147         return self.__revisions
 148
 149     def __next__(self):
 150         return next(self.__revisions)
 151
 152 class WikiqParser():
 153
 154     def __init__(self, input_file, output_file, scanner, match_regex, collapse_user=False, persist=None, urlencode=False, namespaces = None):
 155         """
 156         Parameters:
 157            persist : what persistence method to use. Takes a PersistMethod value
 158         """
 159
 160         self.input_file = input_file
 161         self.output_file = output_file
 162         self.collapse_user = collapse_user
 163         self.persist = persist
 164         self.printed_header = False
 165         self.namespaces = []
 166         self.urlencode = urlencode
 167         self.scanner = scanner
 168         self.match_regex = match_regex
 169
 170         if namespaces is not None:
 171             self.namespace_filter = set(namespaces)
 172         else:
 173             self.namespace_filter = None
 174
 175     def __get_namespace_from_title(self, title):
 176         default_ns = None
 177
 178         for ns in self.namespaces:
 179             # skip if the namespace is not defined
 180             if ns == None:
 181                 default_ns = self.namespaces[ns]
 182                 continue
 183
 184             if title.startswith(ns + ":"):
 185                 return self.namespaces[ns]
 186
 187         # if we've made it this far with no matches, we return the default namespace
 188         return default_ns
 189
 190
 191     def process(self):
 192
 193         # create a regex that creates the output filename
 194         # output_filename = re.sub(r'^.*/(enwiki\-\d+)\-.*p(\d+)p.*$',
 195         #                         r'output/wikiq-\1-\2.tsv',
 196         #                         input_filename)
 197
 198         # Construct dump file iterator
 199         dump = WikiqIterator(self.input_file, collapse_user=self.collapse_user)
 200
 201         # extract list of namspaces
 202         self.namespaces = {ns.name : ns.id for ns in dump.mwiterator.site_info.namespaces}
 203
 204         page_count = 0
 205         rev_count = 0
 206
 207
 208         # Iterate through pages
 209         for page in dump:
 210             namespace = page.namespace if page.namespace is not None else self.__get_namespace_from_title(page.title)
 211
 212             # skip namespaces not in the filter
 213             if self.namespace_filter is not None:
 214                 if namespace not in self.namespace_filter:
 215                     continue
 216
 217             rev_detector = mwreverts.Detector()
 218
 219             if self.persist != PersistMethod.none:
 220                 window = deque(maxlen=PERSISTENCE_RADIUS)
 221
 222                 if self.persist == PersistMethod.sequence:
 223                     state = mwpersistence.DiffState(SequenceMatcher(tokenizer = wikitext_split),
 224                                                     revert_radius=PERSISTENCE_RADIUS)
 225
 226                 elif self.persist == PersistMethod.segment:
 227                     state = mwpersistence.DiffState(SegmentMatcher(tokenizer = wikitext_split),
 228                                                     revert_radius=PERSISTENCE_RADIUS)
 229
 230                 # self.persist == PersistMethod.legacy
 231                 else:
 232                     from mw.lib import persistence
 233                     state = persistence.State()
 234
 235             # Iterate through a page's revisions
 236             for rev in page:
 237                 ## m = re.finditer() #so we can find all instances
 238                 ## m.groupdict() #so we can look at them all with their names
 239
 240                 # initialize rev_dat
 241                 rev_data = {}
 242
 243                 if self.scanner is not None: # we know we want to do a regex search
 244                     ## comment = want to look in comment attached to revision
 245                     ## text = want to look in revision text
 246
 247                     ### call the scanner function
 248                     rev_data = matchmaker(rev_data, self.match_regex, self.scanner, rev)
 249
 250                 if self.scanner is not None and rev_data['matches'] is None:
 251                     next
 252
 253                 # we fill out the rest of the data structure now
 254                 rev_data['revid'] = rev.id
 255                 rev_data['date_time'] = rev.timestamp.strftime('%Y-%m-%d %H:%M:%S')
 256                 rev_data['articleid'] = page.id
 257                 rev_data['editor_id'] = "" if rev.deleted.user == True or rev.user.id is None else rev.user.id
 258                 rev_data['title'] = '"' + page.title + '"'
 259                 rev_data['namespace'] = namespace
 260                 rev_data['deleted'] = "TRUE" if rev.deleted.text else "FALSE"
 261
 262                 # if revisions are deleted, /many/ things will be missing
 263                 if rev.deleted.text:
 264                     rev_data['text_chars'] = ""
 265                     rev_data['sha1'] = ""
 266                     rev_data['revert'] = ""
 267                     rev_data['reverteds'] = ""
 268
 269                 else:
 270                     # rev.text can be None if the page has no text
 271                     if not rev.text:
 272                         rev.text = ""
 273                     # if text exists, we'll check for a sha1 and generate one otherwise
 274
 275                     if rev.sha1:
 276                         text_sha1 = rev.sha1
 277                     else:
 278
 279                         text_sha1 = sha1(bytes(rev.text, "utf8")).hexdigest()
 280
 281                     rev_data['sha1'] = text_sha1
 282
 283                     # TODO rev.bytes doesn't work.. looks like a bug
 284                     rev_data['text_chars'] = len(rev.text)
 285
 286                     # generate revert data
 287                     revert = rev_detector.process(text_sha1, rev.id)
 288
 289                     if revert:
 290                         rev_data['revert'] = "TRUE"
 291                         rev_data['reverteds'] = '"' + ",".join([str(x) for x in revert.reverteds]) + '"'
 292                     else:
 293                         rev_data['revert'] = "FALSE"
 294                         rev_data['reverteds'] = ""
 295
 296                 # if the fact that the edit was minor can be hidden, this might be an issue
 297                 rev_data['minor'] = "TRUE" if rev.minor else "FALSE"
 298
 299                 if not rev.deleted.user:
 300                     # wrap user-defined editors in quotes for fread
 301                     rev_data['editor'] = '"' + rev.user.text + '"'
 302                     rev_data['anon'] = "TRUE" if rev.user.id == None else "FALSE"
 303
 304                 else:
 305                     rev_data['anon'] = ""
 306                     rev_data['editor'] = ""
 307
 308                 #if re.match(r'^#redirect \[\[.*\]\]', rev.text, re.I):
 309                 #    redirect = True
 310                 #else:
 311                 #    redirect = False
 312
 313                 #TODO missing: additions_size deletions_size
 314
 315                 # if collapse user was on, lets run that
 316                 if self.collapse_user:
 317                     rev_data['collapsed_revs'] = rev.collapsed_revs
 318
 319                 if self.persist != PersistMethod.none:
 320                     if rev.deleted.text:
 321                         for k in ["token_revs", "tokens_added", "tokens_removed", "tokens_window"]:
 322                             old_rev_data[k] = None
 323                     else:
 324
 325                         if self.persist != PersistMethod.legacy:
 326                             _, tokens_added, tokens_removed = state.update(rev.text, rev.id)
 327
 328                         else:
 329                             _, tokens_added, tokens_removed = state.process(rev.text, rev.id, text_sha1)
 330
 331                         window.append((rev.id, rev_data, tokens_added, tokens_removed))
 332
 333                         if len(window) == PERSISTENCE_RADIUS:
 334                             old_rev_id, old_rev_data, old_tokens_added, old_tokens_removed = window[0]
 335
 336                             num_token_revs, num_tokens = calculate_persistence(old_tokens_added)
 337
 338                             old_rev_data["token_revs"] = num_token_revs
 339                             old_rev_data["tokens_added"] = num_tokens
 340                             old_rev_data["tokens_removed"] = len(old_tokens_removed)
 341                             old_rev_data["tokens_window"] = PERSISTENCE_RADIUS-1
 342
 343                             self.print_rev_data(old_rev_data)
 344
 345                 else:
 346                     self.print_rev_data(rev_data)
 347
 348                 rev_count += 1
 349
 350             if self.persist != PersistMethod.none:
 351                 # print out metadata for the last RADIUS revisions
 352                 for i, item in enumerate(window):
 353                     # if the window was full, we've already printed item 0
 354                     if len(window) == PERSISTENCE_RADIUS and i == 0:
 355                         continue
 356
 357                     rev_id, rev_data, tokens_added, tokens_removed = item
 358                     num_token_revs, num_tokens = calculate_persistence(tokens_added)
 359
 360                     rev_data["token_revs"] = num_token_revs
 361                     rev_data["tokens_added"] = num_tokens
 362                     rev_data["tokens_removed"] = len(tokens_removed)
 363                     rev_data["tokens_window"] = len(window)-(i+1)
 364
 365                     self.print_rev_data(rev_data)
 366
 367             page_count += 1
 368
 369         print("Done: %s revisions and %s pages." % (rev_count, page_count),
 370               file=sys.stderr)
 371
 372     def print_rev_data(self, rev_data):
 373         # if it's the first time through, print the header
 374         if self.urlencode:
 375             for field in TO_ENCODE:
 376                 rev_data[field] = quote(str(rev_data[field]))
 377
 378         if not self.printed_header:
 379             print("\t".join([str(k) for k in sorted(rev_data.keys())]), file=self.output_file)
 380             self.printed_header = True
 381
 382         print("\t".join([str(v) for k, v in sorted(rev_data.items())]), file=self.output_file)
 383
 384
 385 def open_input_file(input_filename):
 386     if re.match(r'.*\.7z$', input_filename):
 387         cmd = ["7za", "x", "-so", input_filename, '*']
 388     elif re.match(r'.*\.gz$', input_filename):
 389         cmd = ["zcat", input_filename]
 390     elif re.match(r'.*\.bz2$', input_filename):
 391         cmd = ["bzcat", "-dk", input_filename]
 392
 393     try:
 394         input_file = Popen(cmd, stdout=PIPE).stdout
 395     except NameError:
 396         input_file = open(input_filename, 'r')
 397
 398     return input_file
 399
 400 def open_output_file(input_filename):
 401     # create a regex that creates the output filename
 402     output_filename = re.sub(r'\.(7z|gz|bz2)?$', '', input_filename)
 403     output_filename = re.sub(r'\.xml', '', output_filename)
 404     output_filename = output_filename + ".tsv"
 405     output_file = open(output_filename, "w")
 406
 407     return output_file
 408
 409 parser = argparse.ArgumentParser(description='Parse MediaWiki XML database dumps into tab delimitted data.')
 410
 411 # arguments for the input direction
 412 parser.add_argument('dumpfiles', metavar="DUMPFILE", nargs="*", type=str,
 413                     help="Filename of the compressed or uncompressed XML database dump. If absent, we'll look for content on stdin and output on stdout.")
 414
 415 parser.add_argument('-o', '--output-dir', metavar='DIR', dest='output_dir', type=str, nargs=1,
 416                     help="Directory for output files.")
 417
 418 parser.add_argument('-s', '--stdout', dest="stdout", action="store_true",
 419                     help="Write output to standard out (do not create dump file)")
 420
 421 parser.add_argument('--collapse-user', dest="collapse_user", action="store_true",
 422                     help="Operate only on the final revision made by user a user within all sequences of consecutive edits made by a user. This can be useful for addressing issues with text persistence measures.")
 423
 424 parser.add_argument('-p', '--persistence', dest="persist", default=None, const='', type=str, choices = ['','segment','sequence','legacy'], nargs='?',
 425                     help="Compute and report measures of content persistent: (1) persistent token revisions, (2) tokens added, and (3) number of revision used in computing the first measure. This may by slow.  The defualt is -p=sequence, which uses the same algorithm as in the past, but with improvements to wikitext parsing. Use -p=legacy for old behavior used in older research projects. Use -p=segment for advanced persistence calculation method that is robust to content moves, but prone to bugs, and slower.")
 426
 427 parser.add_argument('-u', '--url-encode', dest="urlencode", action="store_true",
 428                     help="Output url encoded text strings. This works around some data issues like newlines in editor names. In the future it may be used to output other text data.")
 429
 430 parser.add_argument('-n', '--namespace-include', dest="namespace_filter", type=int, action='append',
 431                     help="Id number of namspace to include. Can be specified more than once.")
 432
 433 parser.add_argument('-rs', '--regex-scanner', dest="scanner",type=str, action='append',
 434                     help="Find the regex match specified by -R/--match searching in: (1) comment (2) text.")
 435
 436 parser.add_argument('-R', '--match', dest="match_regex", type=str,
 437                     help="The regular expression you would like to find in the string and put in capture group")
 438
 439 args = parser.parse_args()
 440
 441 # set persistence method
 442
 443 if args.persist is None:
 444     persist = PersistMethod.none
 445 elif args.persist == "segment":
 446     persist = PersistMethod.segment
 447 elif args.persist == "legacy":
 448     persist = PersistMethod.legacy
 449 else:
 450     persist = PersistMethod.sequence
 451
 452 if args.namespace_filter is not None:
 453     namespaces = args.namespace_filter
 454 else:
 455     namespaces = None
 456
 457 if len(args.dumpfiles) > 0:
 458     for filename in args.dumpfiles:
 459         input_file = open_input_file(filename)
 460
 461         # open directory for output
 462         if args.output_dir:
 463             output_dir = args.output_dir[0]
 464         else:
 465             output_dir = "."
 466
 467         print("Processing file: %s" % filename, file=sys.stderr)
 468
 469         if args.stdout:
 470             output_file = sys.stdout
 471         else:
 472             filename = os.path.join(output_dir, os.path.basename(filename))
 473             output_file = open_output_file(filename)
 474
 475         wikiq = WikiqParser(input_file, output_file,
 476                             collapse_user=args.collapse_user,
 477                             persist=persist,
 478                             urlencode=args.urlencode,
 479                             namespaces = namespaces,
 480                             match_regex=args.match_regex, # adding in the new 2 args for regex searching
 481                             scanner=args.scanner)
 482
 483         wikiq.process()
 484
 485         # close things
 486         input_file.close()
 487         output_file.close()
 488 else:
 489     wikiq = WikiqParser(sys.stdin, sys.stdout,
 490                         collapse_user=args.collapse_user,
 491                         persist=persist,
 492                         #persist_legacy=args.persist_legacy,
 493                         urlencode=args.urlencode,
 494                         namespaces = namespaces,
 495                         match_regex=args.match_regex, # adding in the new 2 args for regex searching
 496                         scanner=args.scanner)
 497     wikiq.process()
 498
 499 # stop_words = "a,able,about,across,after,all,almost,also,am,among,an,and,any,are,as,at,be,because,been,but,by,can,cannot,could,dear,did,do,does,either,else,ever,every,for,from,get,got,had,has,have,he,her,hers,him,his,how,however,i,if,in,into,is,it,its,just,least,let,like,likely,may,me,might,most,must,my,neither,no,nor,not,of,off,often,on,only,or,other,our,own,rather,said,say,says,she,should,since,so,some,than,that,the,their,them,then,there,these,they,this,tis,to,too,twas,us,wants,was,we,were,what,when,where,which,while,who,whom,why,will,with,would,yet,you,your"
 500 # stop_words = stop_words.split(",")