IkiWiki/Plugin/comments.pm

   1 #!/usr/bin/perl
   2 # Copyright © 2006-2008 Joey Hess <joey@ikiwiki.info>
   3 # Copyright © 2008 Simon McVittie <http://smcv.pseudorandom.co.uk/>
   4 # Licensed under the GNU GPL, version 2, or any later version published by the
   5 # Free Software Foundation
   6 package IkiWiki::Plugin::comments;
   7
   8 use warnings;
   9 use strict;
  10 use IkiWiki 3.00;
  11 use Encode;
  12 use POSIX qw(strftime);
  13
  14 use constant PREVIEW => "Preview";
  15 use constant POST_COMMENT => "Post comment";
  16 use constant CANCEL => "Cancel";
  17
  18 my $postcomment;
  19 my %commentstate;
  20
  21 sub import {
  22         hook(type => "checkconfig", id => 'comments',  call => \&checkconfig);
  23         hook(type => "getsetup", id => 'comments',  call => \&getsetup);
  24         hook(type => "preprocess", id => 'comment', call => \&preprocess);
  25         hook(type => "preprocess", id => 'commentmoderation', call => \&preprocess_moderation);
  26         # here for backwards compatability with old comments
  27         hook(type => "preprocess", id => '_comment', call => \&preprocess);
  28         hook(type => "sessioncgi", id => 'comment', call => \&sessioncgi);
  29         hook(type => "htmlize", id => "_comment", call => \&htmlize);
  30         hook(type => "htmlize", id => "_comment_pending",
  31                 call => \&htmlize_pending);
  32         hook(type => "pagetemplate", id => "comments", call => \&pagetemplate);
  33         hook(type => "formbuilder_setup", id => "comments",
  34                 call => \&formbuilder_setup);
  35         # Load goto to fix up user page links for logged-in commenters
  36         IkiWiki::loadplugin("goto");
  37         IkiWiki::loadplugin("inline");
  38 }
  39
  40 sub getsetup () {
  41         return
  42                 plugin => {
  43                         safe => 1,
  44                         rebuild => 1,
  45                         section => "web",
  46                 },
  47                 comments_pagespec => {
  48                         type => 'pagespec',
  49                         example => 'blog/* and !*/Discussion',
  50                         description => 'PageSpec of pages where comments are allowed',
  51                         link => 'ikiwiki/PageSpec',
  52                         safe => 1,
  53                         rebuild => 1,
  54                 },
  55                 comments_closed_pagespec => {
  56                         type => 'pagespec',
  57                         example => 'blog/controversial or blog/flamewar',
  58                         description => 'PageSpec of pages where posting new comments is not allowed',
  59                         link => 'ikiwiki/PageSpec',
  60                         safe => 1,
  61                         rebuild => 1,
  62                 },
  63                 comments_pagename => {
  64                         type => 'string',
  65                         default => 'comment_',
  66                         description => 'Base name for comments, e.g. "comment_" for pages like "sandbox/comment_12"',
  67                         safe => 0, # manual page moving required
  68                         rebuild => undef,
  69                 },
  70                 comments_allowdirectives => {
  71                         type => 'boolean',
  72                         example => 0,
  73                         description => 'Interpret directives in comments?',
  74                         safe => 1,
  75                         rebuild => 0,
  76                 },
  77                 comments_allowauthor => {
  78                         type => 'boolean',
  79                         example => 0,
  80                         description => 'Allow anonymous commenters to set an author name?',
  81                         safe => 1,
  82                         rebuild => 0,
  83                 },
  84                 comments_commit => {
  85                         type => 'boolean',
  86                         example => 1,
  87                         description => 'commit comments to the VCS',
  88                         # old uncommitted comments are likely to cause
  89                         # confusion if this is changed
  90                         safe => 0,
  91                         rebuild => 0,
  92                 },
  93 }
  94
  95 sub checkconfig () {
  96         $config{comments_commit} = 1
  97                 unless defined $config{comments_commit};
  98         $config{comments_pagespec} = ''
  99                 unless defined $config{comments_pagespec};
 100         $config{comments_closed_pagespec} = ''
 101                 unless defined $config{comments_closed_pagespec};
 102         $config{comments_pagename} = 'comment_'
 103                 unless defined $config{comments_pagename};
 104 }
 105
 106 sub htmlize {
 107         my %params = @_;
 108         return $params{content};
 109 }
 110
 111 sub htmlize_pending {
 112         my %params = @_;
 113         return sprintf(gettext("this comment needs %s"),
 114                 '<a href="'.
 115                 IkiWiki::cgiurl(do => "commentmoderation").'">'.
 116                 gettext("moderation").'</a>');
 117 }
 118
 119 # FIXME: copied verbatim from meta
 120 sub safeurl ($) {
 121         my $url=shift;
 122         if (exists $IkiWiki::Plugin::htmlscrubber::{safe_url_regexp} &&
 123             defined $IkiWiki::Plugin::htmlscrubber::safe_url_regexp) {
 124                 return $url=~/$IkiWiki::Plugin::htmlscrubber::safe_url_regexp/;
 125         }
 126         else {
 127                 return 1;
 128         }
 129 }
 130
 131 sub preprocess {
 132         my %params = @_;
 133         my $page = $params{page};
 134
 135         my $format = $params{format};
 136         if (defined $format && ! exists $IkiWiki::hooks{htmlize}{$format}) {
 137                 error(sprintf(gettext("unsupported page format %s"), $format));
 138         }
 139
 140         my $content = $params{content};
 141         if (! defined $content) {
 142                 error(gettext("comment must have content"));
 143         }
 144         $content =~ s/\\"/"/g;
 145
 146         if ($config{comments_allowdirectives}) {
 147                 $content = IkiWiki::preprocess($page, $params{destpage},
 148                         $content);
 149         }
 150
 151         # no need to bother with htmlize if it's just HTML
 152         $content = IkiWiki::htmlize($page, $params{destpage}, $format, $content)
 153                 if defined $format;
 154
 155         IkiWiki::run_hooks(sanitize => sub {
 156                 $content = shift->(
 157                         page => $page,
 158                         destpage => $params{destpage},
 159                         content => $content,
 160                 );
 161         });
 162
 163         # set metadata, possibly overriding [[!meta]] directives from the
 164         # comment itself
 165
 166         my $commentuser;
 167         my $commentip;
 168         my $commentauthor;
 169         my $commentauthorurl;
 170         my $commentopenid;
 171         if (defined $params{username}) {
 172                 $commentuser = $params{username};
 173
 174                 my $oiduser = eval { IkiWiki::openiduser($commentuser) };
 175
 176                 if (defined $oiduser) {
 177                         # looks like an OpenID
 178                         $commentauthorurl = $commentuser;
 179                         $commentauthor = (defined $params{nickname} && length $params{nickname}) ? $params{nickname} : $oiduser;
 180                         $commentopenid = $commentuser;
 181                 }
 182                 else {
 183                         $commentauthorurl = IkiWiki::cgiurl(
 184                                 do => 'goto',
 185                                 page => IkiWiki::userpage($commentuser)
 186                         );
 187
 188                         $commentauthor = $commentuser;
 189                 }
 190         }
 191         else {
 192                 if (defined $params{ip}) {
 193                         $commentip = $params{ip};
 194                 }
 195                 $commentauthor = gettext("Anonymous");
 196         }
 197
 198         $commentstate{$page}{commentuser} = $commentuser;
 199         $commentstate{$page}{commentopenid} = $commentopenid;
 200         $commentstate{$page}{commentip} = $commentip;
 201         $commentstate{$page}{commentauthor} = $commentauthor;
 202         $commentstate{$page}{commentauthorurl} = $commentauthorurl;
 203         if (! defined $pagestate{$page}{meta}{author}) {
 204                 $pagestate{$page}{meta}{author} = $commentauthor;
 205         }
 206         if (! defined $pagestate{$page}{meta}{authorurl}) {
 207                 $pagestate{$page}{meta}{authorurl} = $commentauthorurl;
 208         }
 209
 210         if ($config{comments_allowauthor}) {
 211                 if (defined $params{claimedauthor}) {
 212                         $pagestate{$page}{meta}{author} = $params{claimedauthor};
 213                 }
 214
 215                 if (defined $params{url}) {
 216                         my $url=$params{url};
 217
 218                         eval q{use URI::Heuristic};
 219                         if (! $@) {
 220                                 $url=URI::Heuristic::uf_uristr($url);
 221                         }
 222
 223                         if (safeurl($url)) {
 224                                 $pagestate{$page}{meta}{authorurl} = $url;
 225                         }
 226                 }
 227         }
 228         else {
 229                 $pagestate{$page}{meta}{author} = $commentauthor;
 230                 $pagestate{$page}{meta}{authorurl} = $commentauthorurl;
 231         }
 232
 233         if (defined $params{subject}) {
 234                 # decode title the same way meta does
 235                 eval q{use HTML::Entities};
 236                 $pagestate{$page}{meta}{title} = decode_entities($params{subject});
 237         }
 238
 239         if ($params{page} =~ m/\/\Q$config{comments_pagename}\E\d+_/) {
 240                 $pagestate{$page}{meta}{permalink} = urlto(IkiWiki::dirname($params{page}), undef, 1).
 241                         "#".page_to_id($params{page});
 242         }
 243
 244         eval q{use Date::Parse};
 245         if (! $@) {
 246                 my $time = str2time($params{date});
 247                 $IkiWiki::pagectime{$page} = $time if defined $time;
 248         }
 249
 250         return $content;
 251 }
 252
 253 sub preprocess_moderation {
 254         my %params = @_;
 255
 256         $params{desc}=gettext("Comment Moderation")
 257                 unless defined $params{desc};
 258
 259         if (length $config{cgiurl}) {
 260                 return '<a href="'.
 261                         IkiWiki::cgiurl(do => 'commentmoderation').
 262                         '">'.$params{desc}.'</a>';
 263         }
 264         else {
 265                 return $params{desc};
 266         }
 267 }
 268
 269 sub sessioncgi ($$) {
 270         my $cgi=shift;
 271         my $session=shift;
 272
 273         my $do = $cgi->param('do');
 274         if ($do eq 'comment') {
 275                 editcomment($cgi, $session);
 276         }
 277         elsif ($do eq 'commentmoderation') {
 278                 commentmoderation($cgi, $session);
 279         }
 280         elsif ($do eq 'commentsignin') {
 281                 IkiWiki::cgi_signin($cgi, $session);
 282                 exit;
 283         }
 284 }
 285
 286 # Mostly cargo-culted from IkiWiki::plugin::editpage
 287 sub editcomment ($$) {
 288         my $cgi=shift;
 289         my $session=shift;
 290
 291         IkiWiki::decode_cgi_utf8($cgi);
 292
 293         eval q{use CGI::FormBuilder};
 294         error($@) if $@;
 295
 296         my @buttons = (POST_COMMENT, PREVIEW, CANCEL);
 297         my $form = CGI::FormBuilder->new(
 298                 fields => [qw{do sid page subject editcontent type author url}],
 299                 charset => 'utf-8',
 300                 method => 'POST',
 301                 required => [qw{editcontent}],
 302                 javascript => 0,
 303                 params => $cgi,
 304                 action => $config{cgiurl},
 305                 header => 0,
 306                 table => 0,
 307                 template => { template('editcomment.tmpl') },
 308         );
 309
 310         IkiWiki::decode_form_utf8($form);
 311         IkiWiki::run_hooks(formbuilder_setup => sub {
 312                         shift->(title => "comment", form => $form, cgi => $cgi,
 313                                 session => $session, buttons => \@buttons);
 314                 });
 315         IkiWiki::decode_form_utf8($form);
 316
 317         my $type = $form->param('type');
 318         if (defined $type && length $type && $IkiWiki::hooks{htmlize}{$type}) {
 319                 $type = IkiWiki::possibly_foolish_untaint($type);
 320         }
 321         else {
 322                 $type = $config{default_pageext};
 323         }
 324
 325
 326         my @page_types;
 327         if (exists $IkiWiki::hooks{htmlize}) {
 328                 foreach my $key (grep { !/^_/ } keys %{$IkiWiki::hooks{htmlize}}) {
 329                         push @page_types, [$key, $IkiWiki::hooks{htmlize}{$key}{longname} || $key];
 330                 }
 331         }
 332         @page_types=sort @page_types;
 333
 334         $form->field(name => 'do', type => 'hidden');
 335         $form->field(name => 'sid', type => 'hidden', value => $session->id,
 336                 force => 1);
 337         $form->field(name => 'page', type => 'hidden');
 338         $form->field(name => 'subject', type => 'text', size => 72);
 339         $form->field(name => 'editcontent', type => 'textarea', rows => 10);
 340         $form->field(name => "type", value => $type, force => 1,
 341                 type => 'select', options => \@page_types);
 342
 343         $form->tmpl_param(username => $session->param('name'));
 344
 345         if ($config{comments_allowauthor} and
 346             ! defined $session->param('name')) {
 347                 $form->tmpl_param(allowauthor => 1);
 348                 $form->field(name => 'author', type => 'text', size => '40');
 349                 $form->field(name => 'url', type => 'text', size => '40');
 350         }
 351         else {
 352                 $form->tmpl_param(allowauthor => 0);
 353                 $form->field(name => 'author', type => 'hidden', value => '',
 354                         force => 1);
 355                 $form->field(name => 'url', type => 'hidden', value => '',
 356                         force => 1);
 357         }
 358
 359         if (! defined $session->param('name')) {
 360                 # Make signinurl work and return here.
 361                 $form->tmpl_param(signinurl => IkiWiki::cgiurl(do => 'commentsignin'));
 362                 $session->param(postsignin => $ENV{QUERY_STRING});
 363                 IkiWiki::cgi_savesession($session);
 364         }
 365
 366         # The untaint is OK (as in editpage) because we're about to pass
 367         # it to file_pruned anyway
 368         my $page = $form->field('page');
 369         $page = IkiWiki::possibly_foolish_untaint($page);
 370         if (! defined $page || ! length $page ||
 371                 IkiWiki::file_pruned($page)) {
 372                 error(gettext("bad page name"));
 373         }
 374
 375         my $baseurl = urlto($page, undef, 1);
 376
 377         $form->title(sprintf(gettext("commenting on %s"),
 378                         IkiWiki::pagetitle($page)));
 379
 380         $form->tmpl_param('helponformattinglink',
 381                 htmllink($page, $page, 'ikiwiki/formatting',
 382                         noimageinline => 1,
 383                         linktext => 'FormattingHelp'),
 384                         allowdirectives => $config{allow_directives});
 385
 386         if ($form->submitted eq CANCEL) {
 387                 # bounce back to the page they wanted to comment on, and exit.
 388                 # CANCEL need not be considered in future
 389                 IkiWiki::redirect($cgi, urlto($page, undef, 1));
 390                 exit;
 391         }
 392
 393         if (not exists $pagesources{$page}) {
 394                 error(sprintf(gettext(
 395                         "page '%s' doesn't exist, so you can't comment"),
 396                         $page));
 397         }
 398
 399         if (pagespec_match($page, $config{comments_closed_pagespec},
 400                 location => $page)) {
 401                 error(sprintf(gettext(
 402                         "comments on page '%s' are closed"),
 403                         $page));
 404         }
 405
 406         # Set a flag to indicate that we're posting a comment,
 407         # so that postcomment() can tell it should match.
 408         $postcomment=1;
 409         IkiWiki::check_canedit($page, $cgi, $session);
 410         $postcomment=0;
 411
 412         my $content = "[[!comment format=$type\n";
 413
 414         if (defined $session->param('name')) {
 415                 my $username = $session->param('name');
 416                 $username =~ s/"/&quot;/g;
 417                 $content .= " username=\"$username\"\n";
 418         }
 419         if (defined $session->param('nickname')) {
 420                 my $nickname = $session->param('nickname');
 421                 $nickname =~ s/"/&quot;/g;
 422                 $content .= " nickname=\"$nickname\"\n";
 423         }
 424         elsif (defined $session->remote_addr()) {
 425                 my $ip = $session->remote_addr();
 426                 if ($ip =~ m/^([.0-9]+)$/) {
 427                         $content .= " ip=\"$1\"\n";
 428                 }
 429         }
 430
 431         if ($config{comments_allowauthor}) {
 432                 my $author = $form->field('author');
 433                 if (defined $author && length $author) {
 434                         $author =~ s/"/&quot;/g;
 435                         $content .= " claimedauthor=\"$author\"\n";
 436                 }
 437                 my $url = $form->field('url');
 438                 if (defined $url && length $url) {
 439                         $url =~ s/"/&quot;/g;
 440                         $content .= " url=\"$url\"\n";
 441                 }
 442         }
 443
 444         my $subject = $form->field('subject');
 445         if (defined $subject && length $subject) {
 446                 $subject =~ s/"/&quot;/g;
 447         }
 448         else {
 449                 $subject = "comment ".(num_comments($page, $config{srcdir}) + 1);
 450         }
 451         $content .= " subject=\"$subject\"\n";
 452
 453         $content .= " date=\"" . decode_utf8(strftime('%Y-%m-%dT%H:%M:%SZ', gmtime)) . "\"\n";
 454
 455         my $editcontent = $form->field('editcontent');
 456         $editcontent="" if ! defined $editcontent;
 457         $editcontent =~ s/\r\n/\n/g;
 458         $editcontent =~ s/\r/\n/g;
 459         $editcontent =~ s/"/\\"/g;
 460         $content .= " content=\"\"\"\n$editcontent\n\"\"\"]]\n";
 461
 462         my $location=unique_comment_location($page, $content, $config{srcdir});
 463
 464         # This is essentially a simplified version of editpage:
 465         # - the user does not control the page that's created, only the parent
 466         # - it's always a create operation, never an edit
 467         # - this means that conflicts should never happen
 468         # - this means that if they do, rocks fall and everyone dies
 469
 470         if ($form->submitted eq PREVIEW) {
 471                 my $preview=previewcomment($content, $location, $page, time);
 472                 IkiWiki::run_hooks(format => sub {
 473                         $preview = shift->(page => $page,
 474                                 content => $preview);
 475                 });
 476                 $form->tmpl_param(page_preview => $preview);
 477         }
 478         else {
 479                 $form->tmpl_param(page_preview => "");
 480         }
 481
 482         if ($form->submitted eq POST_COMMENT && $form->validate) {
 483                 IkiWiki::checksessionexpiry($cgi, $session);
 484
 485                 $postcomment=1;
 486                 my $ok=IkiWiki::check_content(content => $form->field('editcontent'),
 487                         subject => $form->field('subject'),
 488                         $config{comments_allowauthor} ? (
 489                                 author => $form->field('author'),
 490                                 url => $form->field('url'),
 491                         ) : (),
 492                         page => $location,
 493                         cgi => $cgi,
 494                         session => $session,
 495                         nonfatal => 1,
 496                 );
 497                 $postcomment=0;
 498
 499                 if (! $ok) {
 500                         $location=unique_comment_location($page, $content, $config{srcdir}, "._comment_pending");
 501                         writefile("$location._comment_pending", $config{srcdir}, $content);
 502
 503                         # Refresh so anything that deals with pending
 504                         # comments can be updated.
 505                         require IkiWiki::Render;
 506                         IkiWiki::refresh();
 507                         IkiWiki::saveindex();
 508
 509                         IkiWiki::printheader($session);
 510                         print IkiWiki::misctemplate(gettext(gettext("comment stored for moderation")),
 511                                 "<p>".
 512                                 gettext("Your comment will be posted after moderator review").
 513                                 "</p>");
 514                         exit;
 515                 }
 516
 517                 # FIXME: could probably do some sort of graceful retry
 518                 # on error? Would require significant unwinding though
 519                 my $file = "$location._comment";
 520                 writefile($file, $config{srcdir}, $content);
 521
 522                 my $conflict;
 523
 524                 if ($config{rcs} and $config{comments_commit}) {
 525                         my $message = gettext("Added a comment");
 526                         if (defined $form->field('subject') &&
 527                                 length $form->field('subject')) {
 528                                 $message = sprintf(
 529                                         gettext("Added a comment: %s"),
 530                                         $form->field('subject'));
 531                         }
 532
 533                         IkiWiki::rcs_add($file);
 534                         IkiWiki::disable_commit_hook();
 535                         $conflict = IkiWiki::rcs_commit_staged(
 536                                 message => $message,
 537                                 session => $session,
 538                         );
 539                         IkiWiki::enable_commit_hook();
 540                         IkiWiki::rcs_update();
 541                 }
 542
 543                 # Now we need a refresh
 544                 require IkiWiki::Render;
 545                 IkiWiki::refresh();
 546                 IkiWiki::saveindex();
 547
 548                 # this should never happen, unless a committer deliberately
 549                 # breaks it or something
 550                 error($conflict) if defined $conflict;
 551
 552                 # Jump to the new comment on the page.
 553                 # The trailing question mark tries to avoid broken
 554                 # caches and get the most recent version of the page.
 555                 IkiWiki::redirect($cgi, urlto($page, undef, 1).
 556                         "?updated#".page_to_id($location));
 557
 558         }
 559         else {
 560                 IkiWiki::showform ($form, \@buttons, $session, $cgi,
 561                         forcebaseurl => $baseurl, page => $page);
 562         }
 563
 564         exit;
 565 }
 566
 567 sub commentmoderation ($$) {
 568         my $cgi=shift;
 569         my $session=shift;
 570
 571         IkiWiki::needsignin($cgi, $session);
 572         if (! IkiWiki::is_admin($session->param("name"))) {
 573                 error(gettext("you are not logged in as an admin"));
 574         }
 575
 576         IkiWiki::decode_cgi_utf8($cgi);
 577
 578         if (defined $cgi->param('sid')) {
 579                 IkiWiki::checksessionexpiry($cgi, $session);
 580
 581                 my $rejectalldefer=$cgi->param('rejectalldefer');
 582
 583                 my %vars=$cgi->Vars;
 584                 my $added=0;
 585                 foreach my $id (keys %vars) {
 586                         if ($id =~ /(.*)\._comment(?:_pending)?$/) {
 587                                 $id=decode_utf8($id);
 588                                 my $action=$cgi->param($id);
 589                                 next if $action eq 'Defer' && ! $rejectalldefer;
 590
 591                                 # Make sure that the id is of a legal
 592                                 # pending comment.
 593                                 my ($f) = $id =~ /$config{wiki_file_regexp}/;
 594                                 if (! defined $f || ! length $f ||
 595                                     IkiWiki::file_pruned($f)) {
 596                                         error("illegal file");
 597                                 }
 598
 599                                 my $page=IkiWiki::dirname($f);
 600                                 my $file="$config{srcdir}/$f";
 601                                 if (! -e $file) {
 602                                         # old location
 603                                         $file="$config{wikistatedir}/comments_pending/".$f;
 604                                 }
 605
 606                                 if ($action eq 'Accept') {
 607                                         my $content=eval { readfile($file) };
 608                                         next if $@; # file vanished since form was displayed
 609                                         my $dest=unique_comment_location($page, $content, $config{srcdir})."._comment";
 610                                         writefile($dest, $config{srcdir}, $content);
 611                                         if ($config{rcs} and $config{comments_commit}) {
 612                                                 IkiWiki::rcs_add($dest);
 613                                         }
 614                                         $added++;
 615                                 }
 616
 617                                 require IkiWiki::Render;
 618                                 IkiWiki::prune($file);
 619                         }
 620                 }
 621
 622                 if ($added) {
 623                         my $conflict;
 624                         if ($config{rcs} and $config{comments_commit}) {
 625                                 my $message = gettext("Comment moderation");
 626                                 IkiWiki::disable_commit_hook();
 627                                 $conflict=IkiWiki::rcs_commit_staged(
 628                                         message => $message,
 629                                         session => $session,
 630                                 );
 631                                 IkiWiki::enable_commit_hook();
 632                                 IkiWiki::rcs_update();
 633                         }
 634
 635                         # Now we need a refresh
 636                         require IkiWiki::Render;
 637                         IkiWiki::refresh();
 638                         IkiWiki::saveindex();
 639
 640                         error($conflict) if defined $conflict;
 641                 }
 642         }
 643
 644         my @comments=map {
 645                 my ($id, $dir, $ctime)=@{$_};
 646                 my $content=readfile("$dir/$id");
 647                 my $preview=previewcomment($content, $id,
 648                         $id, $ctime);
 649                 {
 650                         id => $id,
 651                         view => $preview,
 652                 }
 653         } sort { $b->[2] <=> $a->[2] } comments_pending();
 654
 655         my $template=template("commentmoderation.tmpl");
 656         $template->param(
 657                 sid => $session->id,
 658                 comments => \@comments,
 659         );
 660         IkiWiki::printheader($session);
 661         my $out=$template->output;
 662         IkiWiki::run_hooks(format => sub {
 663                 $out = shift->(page => "", content => $out);
 664         });
 665         print IkiWiki::misctemplate(gettext("comment moderation"), $out);
 666         exit;
 667 }
 668
 669 sub formbuilder_setup (@) {
 670         my %params=@_;
 671
 672         my $form=$params{form};
 673         if ($form->title eq "preferences" &&
 674             IkiWiki::is_admin($params{session}->param("name"))) {
 675                 push @{$params{buttons}}, "Comment Moderation";
 676                 if ($form->submitted && $form->submitted eq "Comment Moderation") {
 677                         commentmoderation($params{cgi}, $params{session});
 678                 }
 679         }
 680 }
 681
 682 sub comments_pending () {
 683         my @ret;
 684
 685         eval q{use File::Find};
 686         error($@) if $@;
 687         eval q{use Cwd};
 688         error($@) if $@;
 689         my $origdir=getcwd();
 690
 691         my $find_comments=sub {
 692                 my $dir=shift;
 693                 my $extension=shift;
 694                 return unless -d $dir;
 695
 696                 chdir($dir) || die "chdir $dir: $!";
 697
 698                 find({
 699                         no_chdir => 1,
 700                         wanted => sub {
 701                                 my $file=decode_utf8($_);
 702                                 $file=~s/^\.\///;
 703                                 return if ! length $file || IkiWiki::file_pruned($file)
 704                                         || -l $_ || -d _ || $file !~ /\Q$extension\E$/;
 705                                 my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
 706                                 if (defined $f) {
 707                                         my $ctime=(stat($_))[10];
 708                                         push @ret, [$f, $dir, $ctime];
 709                                 }
 710                         }
 711                 }, ".");
 712
 713                 chdir($origdir) || die "chdir $origdir: $!";
 714         };
 715
 716         $find_comments->($config{srcdir}, "._comment_pending");
 717         # old location
 718         $find_comments->("$config{wikistatedir}/comments_pending/",
 719                 "._comment");
 720
 721         return @ret;
 722 }
 723
 724 sub previewcomment ($$$) {
 725         my $content=shift;
 726         my $location=shift;
 727         my $page=shift;
 728         my $time=shift;
 729
 730         # Previewing a comment should implicitly enable comment posting mode.
 731         my $oldpostcomment=$postcomment;
 732         $postcomment=1;
 733
 734         my $preview = IkiWiki::htmlize($location, $page, '_comment',
 735                         IkiWiki::linkify($location, $page,
 736                         IkiWiki::preprocess($location, $page,
 737                         IkiWiki::filter($location, $page, $content), 0, 1)));
 738
 739         my $template = template("comment.tmpl");
 740         $template->param(content => $preview);
 741         $template->param(ctime => displaytime($time, undef, 1));
 742         $template->param(html5 => $config{html5});
 743
 744         IkiWiki::run_hooks(pagetemplate => sub {
 745                 shift->(page => $location,
 746                         destpage => $page,
 747                         template => $template);
 748         });
 749
 750         $template->param(have_actions => 0);
 751
 752         $postcomment=$oldpostcomment;
 753
 754         return $template->output;
 755 }
 756
 757 sub commentsshown ($) {
 758         my $page=shift;
 759
 760         return ! pagespec_match($page, "comment(*)",
 761                                 location => $page) &&
 762                pagespec_match($page, $config{comments_pagespec},
 763                               location => $page);
 764 }
 765
 766 sub commentsopen ($) {
 767         my $page = shift;
 768
 769         return length $config{cgiurl} > 0 &&
 770                (! length $config{comments_closed_pagespec} ||
 771                 ! pagespec_match($page, $config{comments_closed_pagespec},
 772                                  location => $page));
 773 }
 774
 775 sub pagetemplate (@) {
 776         my %params = @_;
 777
 778         my $page = $params{page};
 779         my $template = $params{template};
 780         my $shown = ($template->query(name => 'commentslink') ||
 781                      $template->query(name => 'commentsurl') ||
 782                      $template->query(name => 'atomcommentsurl') ||
 783                      $template->query(name => 'comments')) &&
 784                     commentsshown($page);
 785
 786         if ($template->query(name => 'comments')) {
 787                 my $comments = undef;
 788                 if ($shown) {
 789                         $comments = IkiWiki::preprocess_inline(
 790                                 pages => "comment($page)",
 791                                 template => 'comment',
 792                                 show => 0,
 793                                 reverse => 'yes',
 794                                 page => $page,
 795                                 destpage => $params{destpage},
 796                                 feedfile => 'comments',
 797                                 emptyfeeds => 'no',
 798                         );
 799                 }
 800
 801                 if (defined $comments && length $comments) {
 802                         $template->param(comments => $comments);
 803                 }
 804
 805                 if ($shown && commentsopen($page)) {
 806                         $template->param(addcommenturl => addcommenturl($page));
 807                 }
 808         }
 809
 810         if ($shown) {
 811                 if ($template->query(name => 'commentsurl')) {
 812                         $template->param(commentsurl =>
 813                                 urlto($page, undef, 1).'#comments');
 814                 }
 815
 816                 if ($template->query(name => 'atomcommentsurl') && $config{usedirs}) {
 817                         # This will 404 until there are some comments, but I
 818                         # think that's probably OK...
 819                         $template->param(atomcommentsurl =>
 820                                 urlto($page, undef, 1).'comments.atom');
 821                 }
 822
 823                 if ($template->query(name => 'commentslink')) {
 824                         my $num=num_comments($page, $config{srcdir});
 825                         my $link;
 826                         if ($num > 0) {
 827                                 $link = htmllink($page, $params{destpage}, $page,
 828                                         linktext => sprintf(ngettext("%i comment", "%i comments", $num), $num),
 829                                         anchor => "comments",
 830                                         noimageinline => 1
 831                                 );
 832                         }
 833                         elsif (commentsopen($page)) {
 834                                 $link = "<a href=\"".addcommenturl($page)."\">".
 835                                         #translators: Here "Comment" is a verb;
 836                                         #translators: the user clicks on it to
 837                                         #translators: post a comment.
 838                                         gettext("Comment").
 839                                         "</a>";
 840                         }
 841                         $template->param(commentslink => $link)
 842                                 if defined $link;
 843                 }
 844         }
 845
 846         # everything below this point is only relevant to the comments
 847         # themselves
 848         if (!exists $commentstate{$page}) {
 849                 return;
 850         }
 851
 852         if ($template->query(name => 'commentid')) {
 853                 $template->param(commentid => page_to_id($page));
 854         }
 855
 856         if ($template->query(name => 'commentuser')) {
 857                 $template->param(commentuser =>
 858                         $commentstate{$page}{commentuser});
 859         }
 860
 861         if ($template->query(name => 'commentopenid')) {
 862                 $template->param(commentopenid =>
 863                         $commentstate{$page}{commentopenid});
 864         }
 865
 866         if ($template->query(name => 'commentip')) {
 867                 $template->param(commentip =>
 868                         $commentstate{$page}{commentip});
 869         }
 870
 871         if ($template->query(name => 'commentauthor')) {
 872                 $template->param(commentauthor =>
 873                         $commentstate{$page}{commentauthor});
 874         }
 875
 876         if ($template->query(name => 'commentauthorurl')) {
 877                 $template->param(commentauthorurl =>
 878                         $commentstate{$page}{commentauthorurl});
 879         }
 880
 881         if ($template->query(name => 'removeurl') &&
 882             IkiWiki::Plugin::remove->can("check_canremove") &&
 883             length $config{cgiurl}) {
 884                 $template->param(removeurl => IkiWiki::cgiurl(do => 'remove',
 885                         page => $page));
 886                 $template->param(have_actions => 1);
 887         }
 888 }
 889
 890 sub addcommenturl ($) {
 891         my $page=shift;
 892
 893         return IkiWiki::cgiurl(do => 'comment', page => $page);
 894 }
 895
 896 sub num_comments ($$) {
 897         my $page=shift;
 898         my $dir=shift;
 899
 900         my @comments=glob("$dir/$page/$config{comments_pagename}*._comment");
 901         return int @comments;
 902 }
 903
 904 sub unique_comment_location ($$$$) {
 905         my $page=shift;
 906         eval q{use Digest::MD5 'md5_hex'};
 907         error($@) if $@;
 908         my $content_md5=md5_hex(Encode::encode_utf8(shift));
 909         my $dir=shift;
 910         my $ext=shift || "._comment";
 911
 912         my $location;
 913         my $i = num_comments($page, $dir);
 914         do {
 915                 $i++;
 916                 $location = "$page/$config{comments_pagename}${i}_${content_md5}";
 917         } while (-e "$dir/$location$ext");
 918
 919         return $location;
 920 }
 921
 922 sub page_to_id ($) {
 923         # Converts a comment page name into a unique, legal html id
 924         # attribute value, that can be used as an anchor to link to the
 925         # comment.
 926         my $page=shift;
 927
 928         eval q{use Digest::MD5 'md5_hex'};
 929         error($@) if $@;
 930
 931         return "comment-".md5_hex(Encode::encode_utf8(($page)));
 932 }
 933
 934 package IkiWiki::PageSpec;
 935
 936 sub match_postcomment ($$;@) {
 937         my $page = shift;
 938         my $glob = shift;
 939
 940         if (! $postcomment) {
 941                 return IkiWiki::FailReason->new("not posting a comment");
 942         }
 943         return match_glob($page, $glob, @_);
 944 }
 945
 946 sub match_comment ($$;@) {
 947         my $page = shift;
 948         my $glob = shift;
 949
 950         if (! $postcomment) {
 951                 # To see if it's a comment, check the source file type.
 952                 # Deal with comments that were just deleted.
 953                 my $source=exists $IkiWiki::pagesources{$page} ?
 954                         $IkiWiki::pagesources{$page} :
 955                         $IkiWiki::delpagesources{$page};
 956                 my $type=defined $source ? IkiWiki::pagetype($source) : undef;
 957                 if (! defined $type || $type ne "_comment") {
 958                         return IkiWiki::FailReason->new("$page is not a comment");
 959                 }
 960         }
 961
 962         return match_glob($page, "$glob/*", internal => 1, @_);
 963 }
 964
 965 sub match_comment_pending ($$;@) {
 966         my $page = shift;
 967         my $glob = shift;
 968
 969         my $source=exists $IkiWiki::pagesources{$page} ?
 970                 $IkiWiki::pagesources{$page} :
 971                 $IkiWiki::delpagesources{$page};
 972         my $type=defined $source ? IkiWiki::pagetype($source) : undef;
 973         if (! defined $type || $type ne "_comment_pending") {
 974                 return IkiWiki::FailReason->new("$page is not a pending comment");
 975         }
 976
 977         return match_glob($page, "$glob/*", internal => 1, @_);
 978 }
 979
 980 1