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 mw.xml_dump import Iterator
  17 from mw.lib import persistence
  18 from mw.lib import reverts
  19 from urllib.parse import quote
  20 TO_ENCODE = ('title', 'editor')
  21 PERSISTENCE_RADIUS=7
  22
  23 def calculate_persistence(tokens_added):
  24     return(sum([(len(x.revisions)-1) for x in tokens_added]),
  25            len(tokens_added))
  26
  27 class WikiqIterator():
  28     def __init__(self, fh, collapse_user=False):
  29         self.fh = fh
  30         self.collapse_user = collapse_user
  31         self.mwiterator = Iterator.from_file(self.fh)
  32         self.__pages = self.load_pages()
  33
  34     def load_pages(self):
  35         for page in self.mwiterator:
  36             yield WikiqPage(page, collapse_user=self.collapse_user)
  37
  38     def __iter__(self):
  39         return self.__pages
  40
  41     def __next__(self):
  42         return next(self._pages)
  43
  44 class WikiqPage():
  45     __slots__ = ('id', 'title', 'namespace', 'redirect',
  46                  'restrictions', 'mwpage', '__revisions',
  47                  'collapse_user')
  48
  49     def __init__(self, page, collapse_user=False):
  50         self.id = page.id
  51         self.title = page.title
  52         self.namespace = page.namespace
  53         self.redirect = page.redirect
  54         self.restrictions = page.restrictions
  55
  56         self.collapse_user = collapse_user
  57         self.mwpage = page
  58         self.__revisions = self.rev_list()
  59
  60     def rev_list(self):
  61         # Outline for how we want to handle collapse_user=True
  62         # iteration   rev.user   prev_rev.user   add prev_rev?
  63         #         0          A            None           Never
  64         #         1          A               A           False
  65         #         2          B               A            True
  66         #         3          A               B            True
  67         #         4          A               A           False
  68         # Post-loop                          A          Always
  69         for i, rev in enumerate(self.mwpage):
  70             # never yield the first time
  71             if i == 0:
  72                 if self.collapse_user:
  73                     collapsed_revs = 1
  74                     rev.collapsed_revs = collapsed_revs
  75
  76             else:
  77                 if self.collapse_user:
  78                     # yield if this is the last edit in a seq by a user and reset
  79                     if not rev.contributor.user_text == prev_rev.contributor.user_text:
  80                         yield prev_rev
  81                         collapsed_revs = 1
  82                         rev.collapsed_revs = collapsed_revs
  83                     # otherwise, add one to the counter
  84                     else:
  85                         collapsed_revs += 1
  86                         rev.collapsed_revs = collapsed_revs
  87                 # if collapse_user is false, we always yield
  88                 else:
  89                     yield prev_rev
  90
  91             prev_rev = rev
  92         # also yield the final time
  93         yield prev_rev
  94
  95     def __iter__(self):
  96         return self.__revisions
  97
  98     def __next__(self):
  99         return next(self.__revisions)
 100
 101 class WikiqParser():
 102
 103
 104     def __init__(self, input_file, output_file, collapse_user=False, persist=False, urlencode=False):
 105
 106         self.input_file = input_file
 107         self.output_file = output_file
 108         self.collapse_user = collapse_user
 109         self.persist = persist
 110         self.printed_header = False
 111         self.namespaces = []
 112         self.urlencode = urlencode
 113
 114     def __get_namespace_from_title(self, title):
 115         default_ns = None
 116
 117         for ns in self.namespaces:
 118             # skip if the namespace is not defined
 119             if ns == None:
 120                 default_ns = self.namespaces[ns]
 121                 continue
 122
 123             if title.startswith(ns + ":"):
 124                 return self.namespaces[ns]
 125
 126         # if we've made it this far with no matches, we return the default namespace
 127         return default_ns
 128
 129     def process(self):
 130
 131         # create a regex that creates the output filename
 132         # output_filename = re.sub(r'^.*/(enwiki\-\d+)\-.*p(\d+)p.*$',
 133         #                         r'output/wikiq-\1-\2.tsv',
 134         #                         input_filename)
 135
 136         # Construct dump file iterator
 137         dump = WikiqIterator(self.input_file, collapse_user=self.collapse_user)
 138
 139         # extract list of namspaces
 140         self.namespaces = {ns.name : ns.id for ns in dump.mwiterator.namespaces}
 141
 142         page_count = 0
 143         rev_count = 0
 144         # Iterate through pages
 145         for page in dump:
 146             if self.persist:
 147                 state = persistence.State()
 148                 window = deque(maxlen=PERSISTENCE_RADIUS)
 149
 150             rev_detector = reverts.Detector()
 151
 152             # Iterate through a page's revisions
 153             for rev in page:
 154
 155                 rev_data = {'revid' : rev.id,
 156                             'date_time' : rev.timestamp.strftime('%Y-%m-%d %H:%M:%S'),
 157                             'articleid' : page.id,
 158                             'editor_id' : "" if rev.contributor.id == None else rev.contributor.id,
 159                             'title' : '"' + page.title + '"',
 160                             'namespace' : page.namespace if page.namespace else self.__get_namespace_from_title(page.title),
 161                             'deleted' : "TRUE" if rev.text.deleted else "FALSE" }
 162
 163                 # if revisions are deleted, /many/ things will be missing
 164                 if rev.text.deleted:
 165                     rev_data['text_chars'] = ""
 166                     rev_data['sha1'] = ""
 167                     rev_data['revert'] = ""
 168                     rev_data['reverteds'] = ""
 169
 170                 else:
 171                     # if text exists, we'll check for a sha1 and generate one otherwise
 172                     if rev.sha1:
 173                         text_sha1 = rev.sha1
 174                     else:
 175                         text_sha1 = sha1(bytes(rev.text, "utf8")).hexdigest()
 176
 177                     rev_data['sha1'] = text_sha1
 178
 179                     # TODO rev.bytes doesn't work.. looks like a bug
 180                     rev_data['text_chars'] = len(rev.text)
 181
 182                     # generate revert data
 183                     revert = rev_detector.process(text_sha1, rev.id)
 184                     if revert:
 185                         rev_data['revert'] = "TRUE"
 186                         rev_data['reverteds'] = '"' + ",".join([str(x) for x in revert.reverteds]) + '"'
 187                     else:
 188                         rev_data['revert'] = "FALSE"
 189                         rev_data['reverteds'] = ""
 190
 191                 # if the fact that the edit was minor can be hidden, this might be an issue
 192                 rev_data['minor'] = "TRUE" if rev.minor else "FALSE"
 193
 194                 if rev.contributor.user_text:
 195                     # wrap user-defined editors in quotes for fread
 196                     rev_data['editor'] = '"' + rev.contributor.user_text + '"'
 197                     rev_data['anon'] = "TRUE" if rev.contributor.id == None else "FALSE"
 198
 199                 else:
 200                     rev_data['anon'] = ""
 201                     rev_data['editor'] = ""
 202
 203                 #if re.match(r'^#redirect \[\[.*\]\]', rev.text, re.I):
 204                 #    redirect = True
 205                 #else:
 206                 #    redirect = False
 207
 208                 #TODO missing: additions_size deletions_size
 209
 210                 # if collapse user was on, lets run that
 211                 if self.collapse_user:
 212                     rev_data['collapsed_revs'] = rev.collapsed_revs
 213
 214                 if self.persist:
 215                     if rev.text.deleted:
 216                         for k in ["token_revs", "tokens_added", "tokens_removed", "tokens_window"]:
 217                             old_rev_data[k] = None
 218                     else:
 219                         _, tokens_added, tokens_removed = state.process(rev.text, rev.id, text_sha1)
 220                         window.append((rev.id, rev_data, tokens_added, tokens_removed))
 221
 222                         if len(window) == PERSISTENCE_RADIUS:
 223                             old_rev_id, old_rev_data, old_tokens_added, old_tokens_removed = window[0]
 224
 225                             num_token_revs, num_tokens = calculate_persistence(old_tokens_added)
 226
 227                             old_rev_data["token_revs"] = num_token_revs
 228                             old_rev_data["tokens_added"] = num_tokens
 229                             old_rev_data["tokens_removed"] = len(old_tokens_removed)
 230                             old_rev_data["tokens_window"] = PERSISTENCE_RADIUS-1
 231
 232                             self.print_rev_data(old_rev_data)
 233
 234                 else:
 235                     self.print_rev_data(rev_data)
 236
 237                 rev_count += 1
 238
 239             if self.persist:
 240                 # print out metadata for the last RADIUS revisions
 241                 for i, item in enumerate(window):
 242                     # if the window was full, we've already printed item 0
 243                     if len(window) == PERSISTENCE_RADIUS and i == 0:
 244                         continue
 245
 246                     rev_id, rev_data, tokens_added, tokens_removed = item
 247                     num_token_revs, num_tokens = calculate_persistence(tokens_added)
 248
 249                     rev_data["token_revs"] = num_token_revs
 250                     rev_data["tokens_added"] = num_tokens
 251                     rev_data["tokens_removed"] = len(tokens_removed)
 252                     rev_data["tokens_window"] = len(window)-(i+1)
 253
 254                     self.print_rev_data(rev_data)
 255
 256             page_count += 1
 257
 258         print("Done: %s revisions and %s pages." % (rev_count, page_count),
 259               file=sys.stderr)
 260
 261     def print_rev_data(self, rev_data):
 262         # if it's the first time through, print the header
 263         if self.urlencode:
 264             for field in TO_ENCODE:
 265                 rev_data[field] = quote(str(rev_data[field]))
 266
 267         if not self.printed_header:
 268             print("\t".join([str(k) for k in sorted(rev_data.keys())]), file=self.output_file)
 269             self.printed_header = True
 270
 271         print("\t".join([str(v) for k, v in sorted(rev_data.items())]), file=self.output_file)
 272
 273
 274 def open_input_file(input_filename):
 275     if re.match(r'.*\.7z$', input_filename):
 276         cmd = ["7za", "x", "-so", input_filename, '*']
 277     elif re.match(r'.*\.gz$', input_filename):
 278         cmd = ["zcat", input_filename]
 279     elif re.match(r'.*\.bz2$', input_filename):
 280         cmd = ["zcat", input_filename]
 281
 282     try:
 283         input_file = Popen(cmd, stdout=PIPE).stdout
 284     except NameError:
 285         input_file = open(input_filename, 'r')
 286
 287     return input_file
 288
 289 def open_output_file(input_filename):
 290     # create a regex that creates the output filename
 291     output_filename = re.sub(r'\.(7z|gz|bz2)?$', '', input_filename)
 292     output_filename = re.sub(r'\.xml', '', output_filename)
 293     output_filename = output_filename + ".tsv"
 294     output_file = open(output_filename, "w")
 295
 296     return output_file
 297
 298 parser = argparse.ArgumentParser(description='Parse MediaWiki XML database dumps into tab delimitted data.')
 299
 300 # arguments for the input direction
 301 parser.add_argument('dumpfiles', metavar="DUMPFILE", nargs="*", type=str,
 302                     help="Filename of the compressed or uncompressed XML database dump. If absent, we'll look for content on stdin and output on stdout.")
 303
 304 parser.add_argument('-o', '--output-dir', metavar='DIR', dest='output_dir', type=str, nargs=1,
 305                     help="Directory for output files.")
 306
 307 parser.add_argument('-s', '--stdout', dest="stdout", action="store_true",
 308                     help="Write output to standard out (do not create dump file)")
 309
 310 parser.add_argument('--collapse-user', dest="collapse_user", action="store_true",
 311                     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.")
 312
 313 parser.add_argument('-p', '--persistence', dest="persist", action="store_true",
 314                     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.")
 315
 316 parser.add_argument('-u', '--url-encode', dest="urlencode", action="store_true",
 317                     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.")
 318
 319 args = parser.parse_args()
 320
 321 if len(args.dumpfiles) > 0:
 322     for filename in args.dumpfiles:
 323         input_file = open_input_file(filename)
 324
 325         # open directory for output
 326         if args.output_dir:
 327             output_dir = args.output_dir[0]
 328         else:
 329             output_dir = "."
 330
 331         print("Processing file: %s" % filename, file=sys.stderr)
 332
 333         if args.stdout:
 334             output_file = sys.stdout
 335         else:
 336             filename = os.path.join(output_dir, os.path.basename(filename))
 337             output_file = open_output_file(filename)
 338
 339         wikiq = WikiqParser(input_file, output_file,
 340                             collapse_user=args.collapse_user,
 341                             persist=args.persist,
 342                             urlencode=args.urlencode)
 343
 344
 345         wikiq.process()
 346
 347         # close things
 348         input_file.close()
 349         output_file.close()
 350 else:
 351     wikiq = WikiqParser(sys.stdin, sys.stdout,
 352                         collapse_user=args.collapse_user,
 353                         persist=args.persist,
 354                         urlencode=args.urlencode)
 355     wikiq.process()
 356
 357 # 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"
 358 # stop_words = stop_words.split(",")