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