+}
+
+sub check_canedit ($$$;$) {
+ my $page=shift;
+ my $q=shift;
+ my $session=shift;
+ my $nonfatal=shift;
+
+ my $canedit;
+ run_hooks(canedit => sub {
+ return if defined $canedit;
+ my $ret=shift->($page, $q, $session);
+ if (defined $ret) {
+ if ($ret eq "") {
+ $canedit=1;
+ }
+ elsif (ref $ret eq 'CODE') {
+ $ret->() unless $nonfatal;
+ $canedit=0;
+ }
+ elsif (defined $ret) {
+ error($ret) unless $nonfatal;
+ $canedit=0;
+ }
+ }
+ });
+ return defined $canedit ? $canedit : 1;
+}
+
+sub check_content (@) {
+ my %params=@_;
+
+ return 1 if ! exists $hooks{checkcontent}; # optimisation
+
+ if (exists $pagesources{$params{page}}) {
+ my @diff;
+ my %old=map { $_ => 1 }
+ split("\n", readfile(srcfile($pagesources{$params{page}})));
+ foreach my $line (split("\n", $params{content})) {
+ push @diff, $line if ! exists $old{$_};
+ }
+ $params{diff}=join("\n", @diff);
+ }
+
+ my $ok;
+ run_hooks(checkcontent => sub {
+ return if defined $ok;
+ my $ret=shift->(%params);
+ if (defined $ret) {
+ if ($ret eq "") {
+ $ok=1;
+ }
+ elsif (ref $ret eq 'CODE') {
+ $ret->() unless $params{nonfatal};
+ $ok=0;
+ }
+ elsif (defined $ret) {
+ error($ret) unless $params{nonfatal};
+ $ok=0;
+ }
+ }
+
+ });
+ return defined $ok ? $ok : 1;
+}