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