path: root/IkiWiki/Plugin/recentchanges.pm

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

use warnings;
use strict;
use IkiWiki 2.00;
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 => "cgi", id => "recentchanges", call => \&cgi);
}

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});
        }
    }
}

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

    if (defined $config{recentchangespage} && $config{rcs} &&
        $page ne $config{recentchangespage} &&
        $template->query(name => "recentchangesurl")) {
        $template->param(recentchangesurl => urlto($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 cgi ($) {
    my $cgi=shift;
    if (defined $cgi->param('do') && $cgi->param('do') eq "recentchanges_link") {
        # This is a link from a change page to some
        # other page. Since the change pages are only generated
        # once, statically, links on them won't be updated if the
        # page they link to is deleted, or newly created, or
        # changes for whatever reason. So this CGI handles that
        # dynamic linking stuff.
        my $page=decode_utf8($cgi->param("page"));
        if (!defined $page) {
            error("missing page parameter");
        }

        IkiWiki::loadindex();

        # If the page is internal (like a comment), see if it has a
        # permalink. Comments do.
        if (IkiWiki::isinternal($page) &&
            defined $pagestate{$page}{meta}{permalink}) {
            IkiWiki::redirect($cgi,
                              $pagestate{$page}{meta}{permalink});
            exit;
        }

        my $link=bestlink("", $page);
        if (! length $link) {
            print "Content-type: text/html\n\n";
            print IkiWiki::misctemplate(gettext(gettext("missing page")),
                "<p>".
                sprintf(gettext("The page %s does not exist."),
                    htmllink("", "", $page)).
                "</p>");
        }
        else {
            IkiWiki::redirect($cgi, urlto($link, undef, 1));
        }

        exit;
    }
}

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 => "recentchanges_link",
                        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;

    # See if the committer is an openid.
    $change->{author}=$change->{user};
    my $oiduser=eval { IkiWiki::openiduser($change->{user}) };
    if (defined $oiduser) {
        $change->{authorurl}=$change->{user};
        $change->{user}=$oiduser;
    }
    elsif (length $config{cgiurl}) {
        $change->{authorurl} = IkiWiki::cgiurl(
            do => "recentchanges_link",
            page => (length $config{userdir} ? "$config{userdir}/" : "").$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;
}

1