path: root/IkiWiki/Plugin/inline.pm

#!/usr/bin/perl
# Page inlining and blogging.
package IkiWiki::Plugin::inline;

use warnings;
use strict;
use Encode;
use IkiWiki 3.00;
use URI;

my %knownfeeds;
my %page_numfeeds;
my @inline;
my $nested=0;

sub import {
    hook(type => "getopt", id => "inline", call => \&getopt);
    hook(type => "getsetup", id => "inline", call => \&getsetup);
    hook(type => "checkconfig", id => "inline", call => \&checkconfig);
    hook(type => "sessioncgi", id => "inline", call => \&sessioncgi);
    hook(type => "preprocess", id => "inline", 
        call => \&IkiWiki::preprocess_inline);
    hook(type => "pagetemplate", id => "inline",
        call => \&IkiWiki::pagetemplate_inline);
    hook(type => "format", id => "inline", call => \&format, first => 1);
    # Hook to change to do pinging since it's called late.
    # This ensures each page only pings once and prevents slow
    # pings interrupting page builds.
    hook(type => "change", id => "inline", call => \&IkiWiki::pingurl);
}

sub getopt () {
    eval q{use Getopt::Long};
    error($@) if $@;
    Getopt::Long::Configure('pass_through');
    GetOptions(
        "rss!" => \$config{rss},
        "atom!" => \$config{atom},
        "allowrss!" => \$config{allowrss},
        "allowatom!" => \$config{allowatom},
        "pingurl=s" => sub {
            push @{$config{pingurl}}, $_[1];
        },      
    );
}

sub getsetup () {
    return
        plugin => {
            safe => 1,
            rebuild => undef,
            section => "core",
        },
        rss => {
            type => "boolean",
            example => 0,
            description => "enable rss feeds by default?",
            safe => 1,
            rebuild => 1,
        },
        atom => {
            type => "boolean",
            example => 0,
            description => "enable atom feeds by default?",
            safe => 1,
            rebuild => 1,
        },
        allowrss => {
            type => "boolean",
            example => 0,
            description => "allow rss feeds to be used?",
            safe => 1,
            rebuild => 1,
        },
        allowatom => {
            type => "boolean",
            example => 0,
            description => "allow atom feeds to be used?",
            safe => 1,
            rebuild => 1,
        },
        pingurl => {
            type => "string",
            example => "http://rpc.technorati.com/rpc/ping",
            description => "urls to ping (using XML-RPC) on feed update",
            safe => 1,
            rebuild => 0,
        },
}

sub checkconfig () {
    if (($config{rss} || $config{atom}) && ! length $config{url}) {
        error(gettext("Must specify url to wiki with --url when using --rss or --atom"));
    }
    if ($config{rss}) {
        push @{$config{wiki_file_prune_regexps}}, qr/\.rss$/;
    }
    if ($config{atom}) {
        push @{$config{wiki_file_prune_regexps}}, qr/\.atom$/;
    }
    if (! exists $config{pingurl}) {
        $config{pingurl}=[];
    }
}

sub format (@) {
    my %params=@_;

    # Fill in the inline content generated earlier. This is actually an
    # optimisation.
    $params{content}=~s{<div class="inline" id="([^"]+)"></div>}{
        delete @inline[$1,]
    }eg;
    return $params{content};
}

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

    if ($q->param('do') eq 'blog') {
        my $page=titlepage(decode_utf8($q->param('title')));
        $page=~s/(\/)/"__".ord($1)."__"/eg; # don't create subdirs
        # if the page already exists, munge it to be unique
        my $from=$q->param('from');
        my $add="";
        while (exists $IkiWiki::pagecase{lc($from."/".$page.$add)}) {
            $add=1 unless length $add;
            $add++;
        }
        $q->param('page', "/$from/$page$add");
        # now go create the page
        $q->param('do', 'create');
        # make sure the editpage plugin is loaded
        if (IkiWiki->can("cgi_editpage")) {
            IkiWiki::cgi_editpage($q, $session);
        }
        else {
            error(gettext("page editing not allowed"));
        }
        exit;
    }
}

# Back to ikiwiki namespace for the rest, this code is very much
# internal to ikiwiki even though it's separated into a plugin.
package IkiWiki;

my %toping;
my %feedlinks;

sub preprocess_inline (@) {
    my %params=@_;
    
    if (! exists $params{pages} && ! exists $params{pagenames}) {
        error gettext("missing pages parameter");
    }
    my $raw=yesno($params{raw});
    my $archive=yesno($params{archive});
    my $rss=(($config{rss} || $config{allowrss}) && exists $params{rss}) ? yesno($params{rss}) : $config{rss};
    my $atom=(($config{atom} || $config{allowatom}) && exists $params{atom}) ? yesno($params{atom}) : $config{atom};
    my $quick=exists $params{quick} ? yesno($params{quick}) : 0;
    my $feeds=exists $params{feeds} ? yesno($params{feeds}) : !$quick && ! $raw;
    my $emptyfeeds=exists $params{emptyfeeds} ? yesno($params{emptyfeeds}) : 1;
    my $feedonly=yesno($params{feedonly});
    if (! exists $params{show} && ! $archive) {
        $params{show}=10;
    }
    if (! exists $params{feedshow} && exists $params{show}) {
        $params{feedshow}=$params{show};
    }
    my $desc;
    if (exists $params{description}) {
        $desc = $params{description} 
    }
    else {
        $desc = $config{wikiname};
    }
    my $actions=yesno($params{actions});
    if (exists $params{template}) {
        $params{template}=~s/[^-_a-zA-Z0-9]+//g;
    }
    else {
        $params{template} = $archive ? "archivepage" : "inlinepage";
    }

    my @list;

    if (exists $params{pagenames}) {
        foreach my $p (qw(sort pages)) {
            if (exists $params{$p}) {
                error sprintf(gettext("the %s and %s parameters cannot be used together"),
                    "pagenames", $p);
            }
        }

        @list = map { bestlink($params{page}, $_) }
                split ' ', $params{pagenames};

        if (yesno($params{reverse})) {
            @list=reverse(@list);
        }

        foreach my $p (@list) {
            add_depends($params{page}, $p, deptype($quick ? "presence" : "content"));
        }
    }
    else {
        my $num=0;
        if ($params{show}) {
            $num=$params{show};
        }
        if ($params{feedshow} && $num < $params{feedshow} && $num > 0) {
            $num=$params{feedshow};
        }
        if ($params{skip} && $num) {
            $num+=$params{skip};
        }

        @list = pagespec_match_list($params{page}, $params{pages},
            deptype => deptype($quick ? "presence" : "content"),
            filter => sub { $_[0] eq $params{page} },
            sort => exists $params{sort} ? $params{sort} : "age",
            reverse => yesno($params{reverse}),
            ($num ? (num => $num) : ()),
        );
    }

    if (exists $params{skip}) {
        @list=@list[$params{skip} .. $#list];
    }
    
    my @feedlist;
    if ($feeds) {
        if (exists $params{feedshow} &&
            $params{feedshow} && @list > $params{feedshow}) {
            @feedlist=@list[0..$params{feedshow} - 1];
        }
        else {
            @feedlist=@list;
        }
    }
    
    if ($params{show} && @list > $params{show}) {
        @list=@list[0..$params{show} - 1];
    }

    if ($feeds && exists $params{feedpages}) {
        @feedlist = pagespec_match_list(
            $params{page}, "($params{pages}) and ($params{feedpages})",
            deptype => deptype($quick ? "presence" : "content"),
            list => \@feedlist,
        );
    }

    my ($feedbase, $feednum);
    if ($feeds) {
        # Ensure that multiple feeds on a page go to unique files.
        
        # Feedfile can lead to conflicts if usedirs is not enabled,
        # so avoid supporting it in that case.
        delete $params{feedfile} if ! $config{usedirs};
        # Tight limits on legal feedfiles, to avoid security issues
        # and conflicts.
        if (defined $params{feedfile}) {
            if ($params{feedfile} =~ /\// ||
                $params{feedfile} !~ /$config{wiki_file_regexp}/) {
                error("illegal feedfile");
            }
            $params{feedfile}=possibly_foolish_untaint($params{feedfile});
        }
        $feedbase=targetpage($params{page}, "", $params{feedfile});

        my $feedid=join("\0", $feedbase, map { $_."\0".$params{$_} } sort keys %params);
        if (exists $knownfeeds{$feedid}) {
            $feednum=$knownfeeds{$feedid};
        }
        else {
            if (exists $page_numfeeds{$params{destpage}}{$feedbase}) {
                if ($feeds) {
                    $feednum=$knownfeeds{$feedid}=++$page_numfeeds{$params{destpage}}{$feedbase};
                }
            }
            else {
                $feednum=$knownfeeds{$feedid}="";
                if ($feeds) {
                    $page_numfeeds{$params{destpage}}{$feedbase}=1;
                }
            }
        }
    }

    my $rssurl=abs2rel($feedbase."rss".$feednum, dirname(htmlpage($params{destpage}))) if $feeds && $rss;
    my $atomurl=abs2rel($feedbase."atom".$feednum, dirname(htmlpage($params{destpage}))) if $feeds && $atom;

    my $ret="";

    if (length $config{cgiurl} && ! $params{preview} && (exists $params{rootpage} ||
        (exists $params{postform} && yesno($params{postform}))) &&
        IkiWiki->can("cgi_editpage")) {
        # Add a blog post form, with feed buttons.
        my $formtemplate=template_depends("blogpost.tmpl", $params{page}, blind_cache => 1);
        $formtemplate->param(cgiurl => IkiWiki::cgiurl());
        $formtemplate->param(rootpage => rootpage(%params));
        $formtemplate->param(rssurl => $rssurl) if $feeds && $rss;
        $formtemplate->param(atomurl => $atomurl) if $feeds && $atom;
        if (exists $params{postformtext}) {
            $formtemplate->param(postformtext =>
                $params{postformtext});
        }
        else {
            $formtemplate->param(postformtext =>
                gettext("Add a new post titled:"));
        }
        $ret.=$formtemplate->output;
            
        # The post form includes the feed buttons, so
        # emptyfeeds cannot be hidden.
        $emptyfeeds=1;
    }
    elsif ($feeds && !$params{preview} && ($emptyfeeds || @feedlist)) {
        # Add feed buttons.
        my $linktemplate=template_depends("feedlink.tmpl", $params{page}, blind_cache => 1);
        $linktemplate->param(rssurl => $rssurl) if $rss;
        $linktemplate->param(atomurl => $atomurl) if $atom;
        $ret.=$linktemplate->output;
    }
    
    if (! $feedonly) {
        my $template;
        if (! $raw) {
            # cannot use wiki pages as templates; template not sanitized due to
            # format hook hack
            eval {
                $template=template_depends($params{template}.".tmpl", $params{page},
                    blind_cache => 1);
            };
            if ($@) {
                error sprintf(gettext("failed to process template %s"), $params{template}.".tmpl").": $@";
            }
        }
        my $needcontent=$raw || (!($archive && $quick) && $template->query(name => 'content'));
    
        foreach my $page (@list) {
            my $file = $pagesources{$page};
            my $type = pagetype($file);
            if (! $raw) {
                if ($needcontent) {
                    # Get the content before populating the
                    # template, since getting the content uses
                    # the same template if inlines are nested.
                    my $content=get_inline_content($page, $params{destpage});
                    $template->param(content => $content);
                }
                $template->param(pageurl => urlto($page, $params{destpage}));
                $template->param(inlinepage => $page);
                $template->param(title => pagetitle(basename($page)));
                $template->param(ctime => displaytime($pagectime{$page}, $params{timeformat}, 1));
                $template->param(mtime => displaytime($pagemtime{$page}, $params{timeformat}));
                $template->param(first => 1) if $page eq $list[0];
                $template->param(last => 1) if $page eq $list[$#list];
                $template->param(html5 => $config{html5});
    
                if ($actions) {
                    my $file = $pagesources{$page};
                    my $type = pagetype($file);
                    if ($config{discussion}) {
                        if ($page !~ /.*\/\Q$config{discussionpage}\E$/i &&
                            (length $config{cgiurl} ||
                             exists $pagesources{$page."/".lc($config{discussionpage})})) {
                            $template->param(have_actions => 1);
                            $template->param(discussionlink =>
                                htmllink($page,
                                    $params{destpage},
                                    $config{discussionpage},
                                    noimageinline => 1,
                                    forcesubpage => 1));
                        }
                    }
                    if (length $config{cgiurl} &&
                        defined $type &&
                        IkiWiki->can("cgi_editpage")) {
                        $template->param(have_actions => 1);
                        $template->param(editurl => cgiurl(do => "edit", page => $page));

                    }
                }
    
                run_hooks(pagetemplate => sub {
                    shift->(page => $page, destpage => $params{destpage},
                        template => $template,);
                });
    
                $ret.=$template->output;
                $template->clear_params;
            }
            else {
                if (defined $type) {
                    $ret.="\n".
                          linkify($page, $params{destpage},
                          preprocess($page, $params{destpage},
                          filter($page, $params{destpage},
                          readfile(srcfile($file)))));
                }
                else {
                    $ret.="\n".
                          readfile(srcfile($file));
                }
            }
        }
    }
    
    if ($feeds && ($emptyfeeds || @feedlist)) {
        if ($rss) {
            my $rssp=$feedbase."rss".$feednum;
            will_render($params{destpage}, $rssp);
            if (! $params{preview}) {
                writefile($rssp, $config{destdir},
                    genfeed("rss",
                        $config{url}."/".$rssp, $desc, $params{guid}, $params{destpage}, @feedlist));
                $toping{$params{destpage}}=1 unless $config{rebuild};
                $feedlinks{$params{destpage}}.=qq{<link rel="alternate" type="application/rss+xml" title="$desc (RSS)" href="$rssurl" />};
            }
        }
        if ($atom) {
            my $atomp=$feedbase."atom".$feednum;
            will_render($params{destpage}, $atomp);
            if (! $params{preview}) {
                writefile($atomp, $config{destdir},
                    genfeed("atom", $config{url}."/".$atomp, $desc, $params{guid}, $params{destpage}, @feedlist));
                $toping{$params{destpage}}=1 unless $config{rebuild};
                $feedlinks{$params{destpage}}.=qq{<link rel="alternate" type="application/atom+xml" title="$desc (Atom)" href="$atomurl" />};
            }
        }
    }
    
    clear_inline_content_cache();

    return $ret if $raw || $nested;
    push @inline, $ret;
    return "<div class=\"inline\" id=\"$#inline\"></div>\n\n";
}

sub pagetemplate_inline (@) {
    my %params=@_;
    my $page=$params{page};
    my $template=$params{template};

    $template->param(feedlinks => $feedlinks{$page})
        if exists $feedlinks{$page} && $template->query(name => "feedlinks");
}

{
my %inline_content;
my $cached_destpage="";

sub get_inline_content ($$) {
    my $page=shift;
    my $destpage=shift;
    
    if (exists $inline_content{$page} && $cached_destpage eq $destpage) {
        return $inline_content{$page};
    }

    my $file=$pagesources{$page};
    my $type=pagetype($file);
    my $ret="";
    if (defined $type) {
        $nested++;
        $ret=htmlize($page, $destpage, $type,
               linkify($page, $destpage,
               preprocess($page, $destpage,
               filter($page, $destpage,
               readfile(srcfile($file))))));
        $nested--;
        if (isinternal($page)) {
            # make inlined text of internal pages searchable
            run_hooks(indexhtml => sub {
                shift->(page => $page, destpage => $page,
                    content => $ret);
            });
        }
    }
    
    if ($cached_destpage ne $destpage) {
        clear_inline_content_cache();
        $cached_destpage=$destpage;
    }
    return $inline_content{$page}=$ret;
}

sub clear_inline_content_cache () {
    %inline_content=();
}

}

sub date_822 ($) {
    my $time=shift;

    my $lc_time=POSIX::setlocale(&POSIX::LC_TIME);
    POSIX::setlocale(&POSIX::LC_TIME, "C");
    my $ret=POSIX::strftime("%a, %d %b %Y %H:%M:%S %z", localtime($time));
    POSIX::setlocale(&POSIX::LC_TIME, $lc_time);
    return $ret;
}

sub absolute_urls ($$) {
    # needed because rss sucks
    my $html=shift;
    my $baseurl=shift;

    my $url=$baseurl;
    $url=~s/[^\/]+$//;
    my $urltop; # calculated if needed

    my $ret="";

    eval q{use HTML::Parser; use HTML::Tagset};
    die $@ if $@;
    my $p = HTML::Parser->new(api_version => 3);
    $p->handler(default => sub { $ret.=join("", @_) }, "text");
    $p->handler(start => sub {
        my ($tagname, $pos, $text) = @_;
        if (ref $HTML::Tagset::linkElements{$tagname}) {
            while (4 <= @$pos) {
                # use attribute sets from right to left
                # to avoid invalidating the offsets
                # when replacing the values
                my ($k_offset, $k_len, $v_offset, $v_len) =
                    splice(@$pos, -4);
                my $attrname = lc(substr($text, $k_offset, $k_len));
                next unless grep { $_ eq $attrname } @{$HTML::Tagset::linkElements{$tagname}};
                next unless $v_offset; # 0 v_offset means no value
                my $v = substr($text, $v_offset, $v_len);
                $v =~ s/^([\'\"])(.*)\1$/$2/;
                if ($v=~/^#/) {
                    $v=$baseurl.$v; # anchor
                }
                elsif ($v=~/^(?!\w+:)[^\/]/) {
                    $v=$url.$v; # relative url
                }
                elsif ($v=~/^\//) {
                    if (! defined $urltop) {
                        # what is the non path part of the url?
                        my $top_uri = URI->new($url);
                        $top_uri->path_query(""); # reset the path
                        $urltop = $top_uri->as_string;
                    }
                    $v=$urltop.$v; # url relative to top of site
                }
                $v =~ s/\"/&quot;/g; # since we quote with ""
                substr($text, $v_offset, $v_len) = qq("$v");
            }
        }
        $ret.=$text;
    }, "tagname, tokenpos, text");
    $p->parse($html);
    $p->eof;

    return $ret;
}

sub genfeed ($$$$$@) {
    my $feedtype=shift;
    my $feedurl=shift;
    my $feeddesc=shift;
    my $guid=shift;
    my $page=shift;
    my @pages=@_;
    
    my $url=URI->new(encode_utf8(urlto($page,"",1)));
    
    my $itemtemplate=template_depends($feedtype."item.tmpl", $page, blind_cache => 1);
    my $content="";
    my $lasttime = 0;
    foreach my $p (@pages) {
        my $u=URI->new(encode_utf8(urlto($p, "", 1)));
        my $pcontent = absolute_urls(get_inline_content($p, $page), $url);

        $itemtemplate->param(
            title => pagetitle(basename($p)),
            url => $u,
            permalink => $u,
            cdate_822 => date_822($pagectime{$p}),
            mdate_822 => date_822($pagemtime{$p}),
            cdate_3339 => date_3339($pagectime{$p}),
            mdate_3339 => date_3339($pagemtime{$p}),
        );

        if (exists $pagestate{$p}) {
            if (exists $pagestate{$p}{meta}{guid}) {
                eval q{use HTML::Entities};
                $itemtemplate->param(guid => HTML::Entities::encode_numeric($pagestate{$p}{meta}{guid}));
            }

            if (exists $pagestate{$p}{meta}{updated}) {
                $itemtemplate->param(mdate_822 => date_822($pagestate{$p}{meta}{updated}));
                $itemtemplate->param(mdate_3339 => date_3339($pagestate{$p}{meta}{updated}));
            }
        }

        if ($itemtemplate->query(name => "enclosure")) {
            my $file=$pagesources{$p};
            my $type=pagetype($file);
            if (defined $type) {
                $itemtemplate->param(content => $pcontent);
            }
            else {
                my $size=(srcfile_stat($file))[8];
                my $mime="unknown";
                eval q{use File::MimeInfo};
                if (! $@) {
                    $mime = mimetype($file);
                }
                $itemtemplate->param(
                    enclosure => $u,
                    type => $mime,
                    length => $size,
                );
            }
        }
        else {
            $itemtemplate->param(content => $pcontent);
        }

        run_hooks(pagetemplate => sub {
            shift->(page => $p, destpage => $page,
                template => $itemtemplate);
        });

        $content.=$itemtemplate->output;
        $itemtemplate->clear_params;

        $lasttime = $pagemtime{$p} if $pagemtime{$p} > $lasttime;
    }

    my $template=template_depends($feedtype."page.tmpl", $page, blind_cache => 1);
    $template->param(
        title => $page ne "index" ? pagetitle($page) : $config{wikiname},
        wikiname => $config{wikiname},
        pageurl => $url,
        content => $content,
        feeddesc => $feeddesc,
        guid => $guid,
        feeddate => date_3339($lasttime),
        feedurl => $feedurl,
        version => $IkiWiki::version,
    );
    run_hooks(pagetemplate => sub {
        shift->(page => $page, destpage => $page,
            template => $template);
    });
    
    return $template->output;
}

sub pingurl (@) {
    return unless @{$config{pingurl}} && %toping;

    eval q{require RPC::XML::Client};
    if ($@) {
        debug(gettext("RPC::XML::Client not found, not pinging"));
        return;
    }

    # daemonize here so slow pings don't slow down wiki updates
    defined(my $pid = fork) or error("Can't fork: $!");
    return if $pid;
    chdir '/';
    POSIX::setsid() or error("Can't start a new session: $!");
    open STDIN, '/dev/null';
    open STDOUT, '>/dev/null';
    open STDERR, '>&STDOUT' or error("Can't dup stdout: $!");

    # Don't need to keep a lock on the wiki as a daemon.
    IkiWiki::unlockwiki();

    foreach my $page (keys %toping) {
        my $title=pagetitle(basename($page), 0);
        my $url=urlto($page, "", 1);
        foreach my $pingurl (@{$config{pingurl}}) {
            debug("Pinging $pingurl for $page");
            eval {
                my $client = RPC::XML::Client->new($pingurl);
                my $req = RPC::XML::request->new('weblogUpdates.ping',
                    $title, $url);
                my $res = $client->send_request($req);
                if (! ref $res) {
                    error("Did not receive response to ping");
                }
                my $r=$res->value;
                if (! exists $r->{flerror} || $r->{flerror}) {
                    error("Ping rejected: ".(exists $r->{message} ? $r->{message} : "[unknown reason]"));
                }
            };
            if ($@) {
                error "Ping failed: $@";
            }
        }
    }

    exit 0; # daemon done
}


sub rootpage (@) {
    my %params=@_;

    my $rootpage;
    if (exists $params{rootpage}) {
        $rootpage=bestlink($params{page}, $params{rootpage});
        if (!length $rootpage) {
            $rootpage=$params{rootpage};
        }
    }
    else {
        $rootpage=$params{page};
    }
    return $rootpage;
}

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