path: root/IkiWiki/Plugin/recentchanges.pm

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

use warnings;
use strict;
use IkiWiki 3.00;
use Encode;
use HTML::Entities;

sub import {
    hook(type => "getsetup", id => "recentchanges", call => \&getsetup);
    hook(type => "checkconfig", id => "recentchanges", call => \&checkconfig);
    hook(type => "refresh", id => "recentchanges", call => \&refresh);
    hook(type => "pagetemplate", id => "recentchanges", call => \&pagetemplate);
    hook(type => "htmlize", id => "_change", call => \&htmlize);
    hook(type => "sessioncgi", id => "recentchanges", call => \&sessioncgi);
    # Load goto to fix up links from recentchanges
    IkiWiki::loadplugin("goto");
}

sub getsetup () {
    return
        plugin => {
            safe => 1,
            rebuild => 1,
        },
        recentchangespage => {
            type => "string",
            example => "recentchanges",
            description => "name of the recentchanges page",
            safe => 1,
            rebuild => 1,
        },
        recentchangesnum => {
            type => "integer",
            example => 100,
            description => "number of changes to track",
            safe => 1,
            rebuild => 0,
        },
}

sub checkconfig () {
    $config{recentchangespage}='recentchanges' unless defined $config{recentchangespage};
    $config{recentchangesnum}=100 unless defined $config{recentchangesnum};
}

sub refresh ($) {
    my %seen;

    # add new changes
    foreach my $change (IkiWiki::rcs_recentchanges($config{recentchangesnum})) {
        $seen{store($change, $config{recentchangespage})}=1;
    }
    
    # delete old and excess changes
    foreach my $page (keys %pagesources) {
        if ($pagesources{$page} =~ /\._change$/ && ! $seen{$page}) {
            unlink($config{srcdir}.'/'.$pagesources{$page});
        }
    }
}

sub confirmation_form {
    my ($q, $session, $rev) = @_;

    eval q{use CGI::FormBuilder};
    error($@) if $@;
    my $f = CGI::FormBuilder->new(
        name => "revert",
        header => 0,
        charset => "utf-8",
        method => 'POST',
        javascript => 0,
        params => $q,
        action => $config{cgiurl},
        stylesheet => 1,
        template => { template('revert.tmpl') },
    );

    $f->field(name => "sid", type => "hidden", value => $session->id,
        force => 1);
    $f->field(name => "do", type => "hidden", value => "revert",
        force => 1);

    return $f, ["Revert", "Cancel"];
}

sub sessioncgi ($$) {
    my ($q, $session) = @_;
    my $do = $q->param('do');
    my $rev = $q->param('rev');

    return unless $do eq 'revert' && $rev;

    my @changes=$IkiWiki::hooks{rcs}{rcs_preprevert}{call}->($rev);
    IkiWiki::check_canchange(
        cgi => $q,
        session => $session,
        changes => \@changes,
    );

    my ($form, $buttons) = confirmation_form($q, $session);
    IkiWiki::decode_form_utf8($form);

    if ($form->submitted eq 'Revert' && $form->validate) {
        IkiWiki::checksessionexpiry($q, $session, $q->param('sid'));
        IkiWiki::disable_commit_hook();
        my $r = $IkiWiki::hooks{rcs}{rcs_revert}{call}->($rev);
        if (! defined $r) { # success
            rcs_commit_staged(
                message => sprintf(gettext("This reverts commit %s"), $rev),
                session => $session,
                rev => $rev,
            );
        }
        IkiWiki::enable_commit_hook();
    
        if (defined $r) {
            die "Revert '$rev' failed.";
        }
        else {
            require IkiWiki::Render;
            IkiWiki::refresh();
            IkiWiki::saveindex();
        }
    }
    elsif ($form->submitted ne 'Cancel') {
            $form->title(sprintf(gettext("confirm reversion of %s"), $rev));
        $form->tmpl_param(diff => encode_entities(scalar IkiWiki::rcs_diff($rev)));
        $form->field(name => "rev", type => "hidden", value => $rev, force => 1);
        IkiWiki::showform($form, $buttons, $session, $q);
        exit 0;
    }

    IkiWiki::redirect($q, urlto($config{recentchangespage}, ''));
    exit 0;
}

# Enable the recentchanges link.
sub pagetemplate (@) {
    my %params=@_;
    my $template=$params{template};
    my $page=$params{page};

    if (defined $config{recentchangespage} && $config{rcs} &&
        $template->query(name => "recentchangesurl") &&
        $page ne $config{recentchangespage}) {
        $template->param(recentchangesurl => urlto($config{recentchangespage}, $page));
        $template->param(have_actions => 1);
    }
}

# Pages with extension _change have plain html markup, pass through.
sub htmlize (@) {
    my %params=@_;
    return $params{content};
}

sub store ($$$) {
    my $change=shift;

    my $page="$config{recentchangespage}/change_".titlepage($change->{rev});

    # Optimisation to avoid re-writing pages. Assumes commits never
    # change (or that any changes are not important).
    return $page if exists $pagesources{$page} && ! $config{rebuild};

    # Limit pages to first 10, and add links to the changed pages.
    my $is_excess = exists $change->{pages}[10];
    delete @{$change->{pages}}[10 .. @{$change->{pages}}] if $is_excess;
    $change->{pages} = [
        map {
            if (length $config{cgiurl}) {
                $_->{link} = "<a href=\"".
                    IkiWiki::cgiurl(
                        do => "goto",
                        page => $_->{page}
                    ).
                    "\" rel=\"nofollow\">".
                    pagetitle($_->{page}).
                    "</a>"
            }
            else {
                $_->{link} = pagetitle($_->{page});
            }
            $_->{baseurl}="$config{url}/" if length $config{url};

            $_;
        } @{$change->{pages}}
    ];
    push @{$change->{pages}}, { link => '...' } if $is_excess;
    
    if (length $config{cgiurl} &&
        exists $IkiWiki::hooks{rcs}{rcs_preprevert} &&
        exists $IkiWiki::hooks{rcs}{rcs_revert}) {
        $change->{reverturl} = IkiWiki::cgiurl(
            do => "revert",
            rev => $change->{rev}
        );
    }

    $change->{author}=$change->{user};
    my $oiduser=eval { IkiWiki::openiduser($change->{user}) };
    if (defined $oiduser) {
        $change->{authorurl}=$change->{user};
        $change->{user}=defined $change->{nickname} ? $change->{nickname} : $oiduser;
    }
    elsif (length $config{cgiurl}) {
        $change->{authorurl} = IkiWiki::cgiurl(
            do => "goto",
            page => IkiWiki::userpage($change->{author}),
        );
    }

    if (ref $change->{message}) {
        foreach my $field (@{$change->{message}}) {
            if (exists $field->{line}) {
                # escape html
                $field->{line} = encode_entities($field->{line});
                # escape links and preprocessor stuff
                $field->{line} = encode_entities($field->{line}, '\[\]');
            }
        }
    }

    # Fill out a template with the change info.
    my $template=template("change.tmpl", blind_cache => 1);
    $template->param(
        %$change,
        commitdate => displaytime($change->{when}, "%X %x"),
        wikiname => $config{wikiname},
    );
    
    $template->param(permalink => "$config{url}/$config{recentchangespage}/#change-".titlepage($change->{rev}))
        if exists $config{url};
    
    IkiWiki::run_hooks(pagetemplate => sub {
        shift->(page => $page, destpage => $page,
            template => $template, rev => $change->{rev});
    });

    my $file=$page."._change";
    writefile($file, $config{srcdir}, $template->output);
    utime $change->{when}, $change->{when}, "$config{srcdir}/$file";

    return $page;
}

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