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