path: root/IkiWiki/Plugin/rename.pm

#!/usr/bin/perl
package IkiWiki::Plugin::rename;

use warnings;
use strict;
use IkiWiki 2.00;

sub import { #{{{
    hook(type => "getsetup", id => "rename", call => \&getsetup);
    hook(type => "formbuilder_setup", id => "rename", call => \&formbuilder_setup);
    hook(type => "formbuilder", id => "rename", call => \&formbuilder);
    hook(type => "sessioncgi", id => "rename", call => \&sessioncgi);

} # }}}

sub getsetup () { #{{{
    return 
        plugin => {
            safe => 1,
            rebuild => 0,
        },
} #}}}

sub check_canrename ($$$$$$) { #{{{
    my $src=shift;
    my $srcfile=shift;
    my $dest=shift;
    my $destfile=shift;
    my $q=shift;
    my $session=shift;

    my $attachment=! defined IkiWiki::pagetype($pagesources{$src});

    # Must be a known source file.
    if (! exists $pagesources{$src}) {
        error(sprintf(gettext("%s does not exist"),
            htmllink("", "", $src, noimageinline => 1)));
    }
    
    # Must exist on disk, and be a regular file.
    if (! -e "$config{srcdir}/$srcfile") {
        error(sprintf(gettext("%s is not in the srcdir, so it cannot be renamed"), $srcfile));
    }
    elsif (-l "$config{srcdir}/$srcfile" && ! -f _) {
        error(sprintf(gettext("%s is not a file"), $srcfile));
    }

    # Must be editable.
    IkiWiki::check_canedit($src, $q, $session);
    if ($attachment) {
        if (IkiWiki::Plugin::attachment->can("check_canattach")) {
            IkiWiki::Plugin::attachment::check_canattach($session, $src, $srcfile);
        }
        else {
            error("renaming of attachments is not allowed");
        }
    }
    
    # Dest checks can be omitted by passing undef.
    if (defined $dest) {
        if ($srcfile eq $destfile) {
            error(gettext("no change to the file name was specified"));
        }

        # Must be a legal filename, and not absolute.
        if (IkiWiki::file_pruned($destfile, $config{srcdir}) || 
            $destfile=~/^\//) {
            error(sprintf(gettext("illegal name")));
        }

        # Must not be a known source file.
        if ($src ne $dest && exists $pagesources{$dest}) {
            error(sprintf(gettext("%s already exists"),
                htmllink("", "", $dest, noimageinline => 1)));
        }
    
        # Must not exist on disk already.
        if (-l "$config{srcdir}/$destfile" || -e _) {
            error(sprintf(gettext("%s already exists on disk"), $destfile));
        }
    
        # Must be editable.
        IkiWiki::check_canedit($dest, $q, $session);
        if ($attachment) {
            # Note that $srcfile is used here, not $destfile,
            # because it wants the current file, to check it.
            IkiWiki::Plugin::attachment::check_canattach($session, $dest, $srcfile);
        }
    }
} #}}}

sub rename_form ($$$) { #{{{ 
    my $q=shift;
    my $session=shift;
    my $page=shift;

    eval q{use CGI::FormBuilder};
    error($@) if $@;
    my $f = CGI::FormBuilder->new(
        name => "rename",
        title => sprintf(gettext("rename %s"), IkiWiki::pagetitle($page)),
        header => 0,
        charset => "utf-8",
        method => 'POST',
        javascript => 0,
        params => $q,
        action => $config{cgiurl},
        stylesheet => IkiWiki::baseurl()."style.css",
        fields => [qw{do page new_name attachment}],
    );
    
    $f->field(name => "do", type => "hidden", value => "rename", force => 1);
    $f->field(name => "page", type => "hidden", value => $page, force => 1);
    $f->field(name => "new_name", value => IkiWiki::pagetitle($page), size => 60);
    if (!$q->param("attachment")) {
        # insert the standard extensions
        my @page_types;
        if (exists $IkiWiki::hooks{htmlize}) {
            @page_types=grep { !/^_/ }
                keys %{$IkiWiki::hooks{htmlize}};
        }
    
        # make sure the current extension is in the list
        my ($ext) = $pagesources{$page}=~/\.([^.]+)$/;
        if (! $IkiWiki::hooks{htmlize}{$ext}) {
            unshift(@page_types, $ext);
        }
    
        $f->field(name => "type", type => 'select',
            options => \@page_types,
            value => $ext, force => 1);
        
        $f->field(name => "subpages",
            label => "",
            type => "checkbox",
            options => [ [ 1 => gettext("Also rename SubPages and attachments") ] ],
            value => 1,
            force => 1);
    }
    $f->field(name => "attachment", type => "hidden");

    return $f, ["Rename", "Cancel"];
} #}}}

sub rename_start ($$$$) { #{{{
    my $q=shift;
    my $session=shift;
    my $attachment=shift;
    my $page=shift;

    check_canrename($page, $pagesources{$page}, undef, undef,
        $q, $session);

    # Save current form state to allow returning to it later
    # without losing any edits.
    # (But don't save what button was submitted, to avoid
    # looping back to here.)
    # Note: "_submit" is CGI::FormBuilder internals.
    $q->param(-name => "_submit", -value => "");
    $session->param(postrename => scalar $q->Vars);
    IkiWiki::cgi_savesession($session);
    
    my ($f, $buttons)=rename_form($q, $session, $page);
    if (defined $attachment) {
        $f->field(name => "attachment", value => $attachment, force => 1);
    }
    
    IkiWiki::showform($f, $buttons, $session, $q);
    exit 0;
} #}}}

sub postrename ($;$$$) { #{{{
    my $session=shift;
    my $src=shift;
    my $dest=shift;
    my $attachment=shift;

    # Load saved form state and return to edit page.
    my $postrename=CGI->new($session->param("postrename"));
    $session->clear("postrename");
    IkiWiki::cgi_savesession($session);

    if (defined $dest) {
        if (! $attachment) {
            # They renamed the page they were editing. This requires
            # fixups to the edit form state.
            # Tweak the edit form to be editing the new page.
            $postrename->param("page", $dest);
        }

        # Update edit form content to fix any links present
        # on it.
        $postrename->param("editcontent",
            renamepage_hook($dest, $src, $dest,
                 $postrename->param("editcontent")));

        # Get a new edit token; old was likely invalidated.
        $postrename->param("rcsinfo",
            IkiWiki::rcs_prepedit($pagesources{$dest}));
    }

    IkiWiki::cgi_editpage($postrename, $session);
} #}}}

sub formbuilder (@) { #{{{
    my %params=@_;
    my $form=$params{form};

    if (defined $form->field("do") && $form->field("do") eq "edit") {
        my $q=$params{cgi};
        my $session=$params{session};

        if ($form->submitted eq "Rename") {
            rename_start($q, $session, 0, $form->field("page"));
        }
        elsif ($form->submitted eq "Rename Attachment") {
            my @selected=$q->param("attachment_select");
            if (@selected > 1) {
                error(gettext("Only one attachment can be renamed at a time."));
            }
            elsif (! @selected) {
                error(gettext("Please select the attachment to rename."))
            }
            rename_start($q, $session, 1, $selected[0]);
        }
    }
} #}}}

my $renamesummary;

sub formbuilder_setup (@) { #{{{
    my %params=@_;
    my $form=$params{form};
    my $q=$params{cgi};

    if (defined $form->field("do") && $form->field("do") eq "edit") {
        # Rename button for the page, and also for attachments.
        push @{$params{buttons}}, "Rename";
        $form->tmpl_param("field-rename" => '<input name="_submit" type="submit" value="Rename Attachment" />');

        if (defined $renamesummary) {
            $form->tmpl_param(message => $renamesummary);
        }
    }
} #}}}

sub sessioncgi ($$) { #{{{
        my $q=shift;

    if ($q->param("do") eq 'rename') {
            my $session=shift;
        my ($form, $buttons)=rename_form($q, $session, $q->param("page"));
        IkiWiki::decode_form_utf8($form);

        if ($form->submitted eq 'Cancel') {
            postrename($session);
        }
        elsif ($form->submitted eq 'Rename' && $form->validate) {
            # These untaints are safe because of the checks
            # performed in check_canrename below.
            my $src=$q->param("page");
            my $srcfile=IkiWiki::possibly_foolish_untaint($pagesources{$src});
            my $dest=IkiWiki::possibly_foolish_untaint(IkiWiki::titlepage($q->param("new_name")));

            my $destfile=$dest;
            if (! $q->param("attachment")) {
                my $type=$q->param('type');
                if (defined $type && length $type && $IkiWiki::hooks{htmlize}{$type}) {
                    $type=IkiWiki::possibly_foolish_untaint($type);
                }
                else {
                    my ($ext)=$srcfile=~/\.([^.]+)$/;
                    $type=$ext;
                }
                
                $destfile.=".".$type;
            }

            check_canrename($src, $srcfile, $dest, $destfile,
                $q, $session);

            # See if subpages need to be renamed.
            my @subpages;
            if ($q->param("subpages") && $src ne $dest) {
                    foreach my $p (keys %pagesources) {
                    if ($pagesources{$p}=~m/^\Q$src\E\/$/) {
                        push @subpages, $p;
                    }
                }
            }

            # Begin renaming process, which will end with a
            # wiki refresh.
            require IkiWiki::Render;
            IkiWiki::disable_commit_hook() if $config{rcs};

            do_rename($srcfile, $destfile, $session);

            foreach my $subpage (@subpages) {
                my $subsrc=$pagesources{$subpage};
                my $subdest=$subsrc;
                $subdest=~s/^\Q$src\E\//$dest/;
                eval {
                    do_rename($subsrc, $subdest, $session)
                };
            }

            my @fixedlinks;
            if ($src ne $dest) {
                push @fixedlinks, fixlinks($src, $dest, $session);
            }

            # End renaming process and refresh wiki.
            if ($config{rcs}) {
                IkiWiki::enable_commit_hook();
                IkiWiki::rcs_update();
            }
            IkiWiki::refresh();
            IkiWiki::saveindex();

            # Scan for any remaining broken links to $src.
            my @brokenlinks;
            if ($src ne $dest) {
                foreach my $page (keys %links) {
                    my $broken=0;
                    foreach my $link (@{$links{$page}}) {
                        my $bestlink=bestlink($page, $link);
                        if ($bestlink eq $src) {
                            $broken=1;
                            last;
                        }
                    }
                    push @brokenlinks, $page if $broken;
                }
            }

            # Generate a rename summary, that will be shown at the top
            # of the edit template.
            my $template=template("renamesummary.tmpl");
            $template->param(src => $srcfile);
            $template->param(dest => $destfile);
            if ($src ne $dest) {
                $template->param(brokenlinks_checked => 1);
                $template->param(brokenlinks => [
                    map {
                        {
                            page => htmllink($dest, $dest, $_,
                                    noimageinline => 1)
                        }
                    } @brokenlinks
                ]);
                $template->param(fixedlinks => [
                    map {
                        {
                            page => htmllink($dest, $dest, $_,
                                    noimageinline => 1)
                        }
                    } @fixedlinks
                ]);
            }
            $renamesummary=$template->output;

            postrename($session, $src, $dest, $q->param("attachment"));
        }
        else {
            IkiWiki::showform($form, $buttons, $session, $q);
        }

        exit 0;
    }
} #}}}

sub renamepage_hook ($$$$) { #{{{
    my ($page, $src, $dest, $content)=@_;

    IkiWiki::run_hooks(renamepage => sub {
        $content=shift->(
            page => $page,
            oldpage => $src,
            newpage => $dest,
            content => $content,
        );
    });

    return $content;
}# }}}
            
sub do_rename ($$$) { #{{{
    my $srcfile=shift;
    my $destfile=shift;
    my $session=shift;
            
    # Actual file rename happens here.
    # First, ensure that the dest directory exists and is ok.
    IkiWiki::prep_writefile($destfile, $config{srcdir});
    if ($config{rcs}) {
        IkiWiki::rcs_rename($srcfile, $destfile);
        IkiWiki::rcs_commit_staged(
            sprintf(gettext("rename %s to %s"), $srcfile, $destfile),
            $session->param("name"), $ENV{REMOTE_ADDR});
    }
    else {
        if (! rename("$config{srcdir}/$srcfile", "$config{srcdir}/$destfile")) {
            error("rename: $!");
        }
    }
} # }}}

sub fixlinks ($$$) { #{{{
    my $src=shift;
    my $dest=shift;
    my $session=shift;

    my @fixedlinks;

    foreach my $page (keys %links) {
        my $needfix=0;
        foreach my $link (@{$links{$page}}) {
            my $bestlink=bestlink($page, $link);
            if ($bestlink eq $src) {
                $needfix=1;
                last;
            }
        }
        if ($needfix) {
            my $file=$pagesources{$page};
            my $oldcontent=readfile($config{srcdir}."/".$file);
            my $content=renamepage_hook($page, $src, $dest, $oldcontent);
            if ($oldcontent ne $content) {
                my $token=IkiWiki::rcs_prepedit($file);
                eval { writefile($file, $config{srcdir}, $content) };
                next if $@;
                my $conflict=IkiWiki::rcs_commit(
                    $file,
                    sprintf(gettext("update for rename of %s to %s"), $src, $dest),
                    $token,
                    $session->param("name"), 
                    $ENV{REMOTE_ADDR}
                );
                push @fixedlinks, $page if ! defined $conflict;
            }
        }
    }

    return @fixedlinks;
} #}}}

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