IkiWiki/Plugin/editpage.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::editpage;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki;
   7 use open qw{:utf8 :std};
   8
   9 sub import {
  10         hook(type => "getsetup", id => "editpage", call => \&getsetup);
  11         hook(type => "refresh", id => "editpage", call => \&refresh);
  12         hook(type => "sessioncgi", id => "editpage", call => \&IkiWiki::cgi_editpage);
  13 }
  14
  15 sub getsetup () {
  16         return
  17                 plugin => {
  18                         safe => 1,
  19                         rebuild => 1,
  20                 },
  21 }
  22
  23 sub refresh () {
  24         if (exists $wikistate{editpage} && exists $wikistate{editpage}{previews}) {
  25                 # Expire old preview files after one hour.
  26                 my $expire=time - (60 * 60);
  27
  28                 my @previews;
  29                 foreach my $file (@{$wikistate{editpage}{previews}}) {
  30                         my $mtime=(stat("$config{destdir}/$file"))[9];
  31                         if (defined $mtime && $mtime <= $expire) {
  32                                 # Avoid deleting a preview that was later saved.
  33                                 my $delete=1;
  34                                 foreach my $page (keys %renderedfiles) {
  35                                         if (grep { $_ eq $file } @{$renderedfiles{$page}}) {
  36                                                 $delete=0;
  37                                         }
  38                                 }
  39                                 if ($delete) {
  40                                         debug(sprintf(gettext("removing old preview %s"), $file));
  41                                         IkiWiki::prune("$config{destdir}/$file");
  42                                 }
  43                         }
  44                         elsif (defined $mtime) {
  45                                 push @previews, $file;
  46                         }
  47                 }
  48                 $wikistate{editpage}{previews}=\@previews;
  49         }
  50 }
  51
  52 # Back to ikiwiki namespace for the rest, this code is very much
  53 # internal to ikiwiki even though it's separated into a plugin,
  54 # and other plugins use the functions below.
  55 package IkiWiki;
  56
  57 sub check_canedit ($$$;$) {
  58         my $page=shift;
  59         my $q=shift;
  60         my $session=shift;
  61         my $nonfatal=shift;
  62
  63         my $canedit;
  64         run_hooks(canedit => sub {
  65                 return if defined $canedit;
  66                 my $ret=shift->($page, $q, $session);
  67                 if (defined $ret) {
  68                         if ($ret eq "") {
  69                                 $canedit=1;
  70                         }
  71                         elsif (ref $ret eq 'CODE') {
  72                                 $ret->() unless $nonfatal;
  73                                 $canedit=0;
  74                         }
  75                         elsif (defined $ret) {
  76                                 error($ret) unless $nonfatal;
  77                                 $canedit=0;
  78                         }
  79                 }
  80         });
  81         return defined $canedit ? $canedit : 1;
  82 }
  83
  84 sub check_content (@) {
  85         my %params=@_;
  86
  87         return 1 if ! exists $hooks{checkcontent}; # optimisation
  88
  89         if (exists $pagesources{$params{page}}) {
  90                 my @diff;
  91                 my %old=map { $_ => 1 }
  92                         split("\n", readfile(srcfile($pagesources{$params{page}})));
  93                 foreach my $line (split("\n", $params{content})) {
  94                         push @diff, $line if ! exists $old{$_};
  95                 }
  96                 $params{content}=join("\n", @diff);
  97         }
  98
  99         my $ok;
 100         run_hooks(checkcontent => sub {
 101                 return if defined $ok;
 102                 my $ret=shift->(%params);
 103                 if (defined $ret) {
 104                         if ($ret eq "") {
 105                                 $ok=1;
 106                         }
 107                         elsif (ref $ret eq 'CODE') {
 108                                 $ret->() unless $params{nonfatal};
 109                                 $ok=0;
 110                         }
 111                         elsif (defined $ret) {
 112                                 error($ret) unless $params{nonfatal};
 113                                 $ok=0;
 114                         }
 115                 }
 116
 117         });
 118         return defined $ok ? $ok : 1;
 119 }
 120
 121 sub cgi_editpage ($$) {
 122         my $q=shift;
 123         my $session=shift;
 124
 125         my $do=$q->param('do');
 126         return unless $do eq 'create' || $do eq 'edit';
 127
 128         decode_cgi_utf8($q);
 129
 130         my @fields=qw(do rcsinfo subpage from page type editcontent comments);
 131         my @buttons=("Save Page", "Preview", "Cancel");
 132         eval q{use CGI::FormBuilder};
 133         error($@) if $@;
 134         my $form = CGI::FormBuilder->new(
 135                 fields => \@fields,
 136                 charset => "utf-8",
 137                 method => 'POST',
 138                 required => [qw{editcontent}],
 139                 javascript => 0,
 140                 params => $q,
 141                 action => $config{cgiurl},
 142                 header => 0,
 143                 table => 0,
 144                 template => scalar template_params("editpage.tmpl"),
 145         );
 146
 147         decode_form_utf8($form);
 148         run_hooks(formbuilder_setup => sub {
 149                 shift->(form => $form, cgi => $q, session => $session,
 150                         buttons => \@buttons);
 151         });
 152         decode_form_utf8($form);
 153
 154         # This untaint is safe because we check file_pruned and
 155         # wiki_file_regexp.
 156         my ($page)=$form->field('page')=~/$config{wiki_file_regexp}/;
 157         $page=possibly_foolish_untaint($page);
 158         my $absolute=($page =~ s#^/+##);
 159         if (! defined $page || ! length $page ||
 160             file_pruned($page, $config{srcdir})) {
 161                 error(gettext("bad page name"));
 162         }
 163
 164         my $baseurl = urlto($page, undef, 1);
 165
 166         my $from;
 167         if (defined $form->field('from')) {
 168                 ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
 169         }
 170
 171         my $file;
 172         my $type;
 173         if (exists $pagesources{$page} && $form->field("do") ne "create") {
 174                 $file=$pagesources{$page};
 175                 $type=pagetype($file);
 176                 if (! defined $type || $type=~/^_/) {
 177                         error(sprintf(gettext("%s is not an editable page"), $page));
 178                 }
 179                 if (! $form->submitted) {
 180                         $form->field(name => "rcsinfo",
 181                                 value => rcs_prepedit($file), force => 1);
 182                 }
 183                 $form->field(name => "editcontent", validate => '/.*/');
 184         }
 185         else {
 186                 $type=$form->param('type');
 187                 if (defined $type && length $type && $hooks{htmlize}{$type}) {
 188                         $type=possibly_foolish_untaint($type);
 189                 }
 190                 elsif (defined $from && exists $pagesources{$from}) {
 191                         # favor the type of linking page
 192                         $type=pagetype($pagesources{$from});
 193                 }
 194                 $type=$config{default_pageext} unless defined $type;
 195                 $file=newpagefile($page, $type);
 196                 if (! $form->submitted) {
 197                         $form->field(name => "rcsinfo", value => "", force => 1);
 198                 }
 199                 $form->field(name => "editcontent", validate => '/.+/');
 200         }
 201
 202         $form->field(name => "do", type => 'hidden');
 203         $form->field(name => "sid", type => "hidden", value => $session->id,
 204                 force => 1);
 205         $form->field(name => "from", type => 'hidden');
 206         $form->field(name => "rcsinfo", type => 'hidden');
 207         $form->field(name => "subpage", type => 'hidden');
 208         $form->field(name => "page", value => $page, force => 1);
 209         $form->field(name => "type", value => $type, force => 1);
 210         $form->field(name => "comments", type => "text", size => 80);
 211         $form->field(name => "editcontent", type => "textarea", rows => 20,
 212                 cols => 80);
 213         $form->tmpl_param("can_commit", $config{rcs});
 214         $form->tmpl_param("indexlink", indexlink());
 215         $form->tmpl_param("helponformattinglink",
 216                 htmllink($page, $page, "ikiwiki/formatting",
 217                         noimageinline => 1,
 218                         linktext => "FormattingHelp"));
 219
 220         if ($form->submitted eq "Cancel") {
 221                 if ($form->field("do") eq "create" && defined $from) {
 222                         redirect($q, urlto($from, undef, 1));
 223                 }
 224                 elsif ($form->field("do") eq "create") {
 225                         redirect($q, $config{url});
 226                 }
 227                 else {
 228                         redirect($q, urlto($page, undef, 1));
 229                 }
 230                 exit;
 231         }
 232         elsif ($form->submitted eq "Preview") {
 233                 my $new=not exists $pagesources{$page};
 234                 if ($new) {
 235                         # temporarily record its type
 236                         $pagesources{$page}=$page.".".$type;
 237                 }
 238                 my %wasrendered=map { $_ => 1 } @{$renderedfiles{$page}};
 239
 240                 my $content=$form->field('editcontent');
 241
 242                 run_hooks(editcontent => sub {
 243                         $content=shift->(
 244                                 content => $content,
 245                                 page => $page,
 246                                 cgi => $q,
 247                                 session => $session,
 248                         );
 249                 });
 250                 my $preview=htmlize($page, $page, $type,
 251                         linkify($page, $page,
 252                         preprocess($page, $page,
 253                         filter($page, $page, $content), 0, 1)));
 254                 run_hooks(format => sub {
 255                         $preview=shift->(
 256                                 page => $page,
 257                                 content => $preview,
 258                         );
 259                 });
 260                 $form->tmpl_param("page_preview", $preview);
 261
 262                 if ($new) {
 263                         delete $pagesources{$page};
 264                 }
 265
 266                 # Previewing may have created files on disk.
 267                 # Keep a list of these to be deleted later.
 268                 my %previews = map { $_ => 1 } @{$wikistate{editpage}{previews}};
 269                 foreach my $f (@{$renderedfiles{$page}}) {
 270                         $previews{$f}=1 unless $wasrendered{$f};
 271                 }
 272                 @{$wikistate{editpage}{previews}} = keys %previews;
 273                 $renderedfiles{$page}=[keys %wasrendered];
 274                 saveindex();
 275         }
 276         elsif ($form->submitted eq "Save Page") {
 277                 $form->tmpl_param("page_preview", "");
 278         }
 279
 280         if ($form->submitted ne "Save Page" || ! $form->validate) {
 281                 if ($form->field("do") eq "create") {
 282                         my @page_locs;
 283                         my $best_loc;
 284                         if (! defined $from || ! length $from ||
 285                             $from ne $form->field('from') ||
 286                             file_pruned($from, $config{srcdir}) ||
 287                             $from=~/^\// ||
 288                             $absolute ||
 289                             $form->submitted) {
 290                                 @page_locs=$best_loc=$page;
 291                         }
 292                         else {
 293                                 my $dir=$from."/";
 294                                 $dir=~s![^/]+/+$!!;
 295
 296                                 if ((defined $form->field('subpage') && length $form->field('subpage')) ||
 297                                     $page eq gettext('discussion')) {
 298                                         $best_loc="$from/$page";
 299                                 }
 300                                 else {
 301                                         $best_loc=$dir.$page;
 302                                 }
 303
 304                                 push @page_locs, $dir.$page;
 305                                 push @page_locs, "$from/$page";
 306                                 while (length $dir) {
 307                                         $dir=~s![^/]+/+$!!;
 308                                         push @page_locs, $dir.$page;
 309                                 }
 310
 311                                 push @page_locs, "$config{userdir}/$page"
 312                                         if length $config{userdir};
 313                         }
 314
 315                         @page_locs = grep {
 316                                 ! exists $pagecase{lc $_}
 317                         } @page_locs;
 318                         if (! @page_locs) {
 319                                 # hmm, someone else made the page in the
 320                                 # meantime?
 321                                 if ($form->submitted eq "Preview") {
 322                                         # let them go ahead with the edit
 323                                         # and resolve the conflict at save
 324                                         # time
 325                                         @page_locs=$page;
 326                                 }
 327                                 else {
 328                                         redirect($q, urlto($page, undef, 1));
 329                                         exit;
 330                                 }
 331                         }
 332
 333                         my @editable_locs = grep {
 334                                 check_canedit($_, $q, $session, 1)
 335                         } @page_locs;
 336                         if (! @editable_locs) {
 337                                 # let it throw an error this time
 338                                 map { check_canedit($_, $q, $session) } @page_locs;
 339                         }
 340
 341                         my @page_types;
 342                         if (exists $hooks{htmlize}) {
 343                                 @page_types=grep { !/^_/ }
 344                                         keys %{$hooks{htmlize}};
 345                         }
 346
 347                         $form->tmpl_param("page_select", 1);
 348                         $form->field(name => "page", type => 'select',
 349                                 options => [ map { [ $_, pagetitle($_, 1) ] } @editable_locs ],
 350                                 value => $best_loc);
 351                         $form->field(name => "type", type => 'select',
 352                                 options => \@page_types);
 353                         $form->title(sprintf(gettext("creating %s"), pagetitle($page)));
 354
 355                 }
 356                 elsif ($form->field("do") eq "edit") {
 357                         check_canedit($page, $q, $session);
 358                         if (! defined $form->field('editcontent') ||
 359                             ! length $form->field('editcontent')) {
 360                                 my $content="";
 361                                 if (exists $pagesources{$page}) {
 362                                         $content=readfile(srcfile($pagesources{$page}));
 363                                         $content=~s/\n/\r\n/g;
 364                                 }
 365                                 $form->field(name => "editcontent", value => $content,
 366                                         force => 1);
 367                         }
 368                         $form->tmpl_param("page_select", 0);
 369                         $form->field(name => "page", type => 'hidden');
 370                         $form->field(name => "type", type => 'hidden');
 371                         $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
 372                 }
 373
 374                 showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
 375         }
 376         else {
 377                 # save page
 378                 check_canedit($page, $q, $session);
 379                 checksessionexpiry($q, $session, $q->param('sid'));
 380
 381                 my $exists=-e "$config{srcdir}/$file";
 382
 383                 if ($form->field("do") ne "create" && ! $exists &&
 384                     ! defined srcfile($file, 1)) {
 385                         $form->tmpl_param("message", template("editpagegone.tmpl")->output);
 386                         $form->field(name => "do", value => "create", force => 1);
 387                         $form->tmpl_param("page_select", 0);
 388                         $form->field(name => "page", type => 'hidden');
 389                         $form->field(name => "type", type => 'hidden');
 390                         $form->title(sprintf(gettext("editing %s"), $page));
 391                         showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
 392                         exit;
 393                 }
 394                 elsif ($form->field("do") eq "create" && $exists) {
 395                         $form->tmpl_param("message", template("editcreationconflict.tmpl")->output);
 396                         $form->field(name => "do", value => "edit", force => 1);
 397                         $form->tmpl_param("page_select", 0);
 398                         $form->field(name => "page", type => 'hidden');
 399                         $form->field(name => "type", type => 'hidden');
 400                         $form->title(sprintf(gettext("editing %s"), $page));
 401                         $form->field("editcontent",
 402                                 value => readfile("$config{srcdir}/$file").
 403                                          "\n\n\n".$form->field("editcontent"),
 404                                 force => 1);
 405                         showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
 406                         exit;
 407                 }
 408
 409                 my $message="";
 410                 if (defined $form->field('comments') &&
 411                     length $form->field('comments')) {
 412                         $message=$form->field('comments');
 413                 }
 414
 415                 my $content=$form->field('editcontent');
 416                 check_content(content => $content, page => $page,
 417                         cgi => $q, session => $session,
 418                         subject => $message);
 419                 run_hooks(editcontent => sub {
 420                         $content=shift->(
 421                                 content => $content,
 422                                 page => $page,
 423                                 cgi => $q,
 424                                 session => $session,
 425                         );
 426                 });
 427                 $content=~s/\r\n/\n/g;
 428                 $content=~s/\r/\n/g;
 429                 $content.="\n" if $content !~ /\n$/;
 430
 431                 $config{cgi}=0; # avoid cgi error message
 432                 eval { writefile($file, $config{srcdir}, $content) };
 433                 $config{cgi}=1;
 434                 if ($@) {
 435                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 436                                 force => 1);
 437                         my $mtemplate=template("editfailedsave.tmpl");
 438                         $mtemplate->param(error_message => $@);
 439                         $form->tmpl_param("message", $mtemplate->output);
 440                         $form->field("editcontent", value => $content, force => 1);
 441                         $form->tmpl_param("page_select", 0);
 442                         $form->field(name => "page", type => 'hidden');
 443                         $form->field(name => "type", type => 'hidden');
 444                         $form->title(sprintf(gettext("editing %s"), $page));
 445                         showform($form, \@buttons, $session, $q,
 446                                 forcebaseurl => $baseurl);
 447                         exit;
 448                 }
 449
 450                 my $conflict;
 451                 if ($config{rcs}) {
 452                         if (! $exists) {
 453                                 rcs_add($file);
 454                         }
 455
 456                         # Prevent deadlock with post-commit hook by
 457                         # signaling to it that it should not try to
 458                         # do anything.
 459                         disable_commit_hook();
 460                         $conflict=rcs_commit($file, $message,
 461                                 $form->field("rcsinfo"),
 462                                 $session->param("name"), $ENV{REMOTE_ADDR});
 463                         enable_commit_hook();
 464                         rcs_update();
 465                 }
 466
 467                 # Refresh even if there was a conflict, since other changes
 468                 # may have been committed while the post-commit hook was
 469                 # disabled.
 470                 require IkiWiki::Render;
 471                 refresh();
 472                 saveindex();
 473
 474                 if (defined $conflict) {
 475                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 476                                 force => 1);
 477                         $form->tmpl_param("message", template("editconflict.tmpl")->output);
 478                         $form->field("editcontent", value => $conflict, force => 1);
 479                         $form->field("do", "edit", force => 1);
 480                         $form->tmpl_param("page_select", 0);
 481                         $form->field(name => "page", type => 'hidden');
 482                         $form->field(name => "type", type => 'hidden');
 483                         $form->title(sprintf(gettext("editing %s"), $page));
 484                         showform($form, \@buttons, $session, $q,
 485                                 forcebaseurl => $baseurl);
 486                 }
 487                 else {
 488                         # The trailing question mark tries to avoid broken
 489                         # caches and get the most recent version of the page.
 490                         redirect($q, urlto($page, undef, 1)."?updated");
 491                 }
 492         }
 493
 494         exit;
 495 }
 496
 497 1