common: bump version to 1.8

[sheet.git] / common.inc.plp

diff --git a/common.inc.plp b/common.inc.plp
index 576e39c88d25c1f50c3933b5fc156586da440aef..fe2a2878a6a09d8c5e7861b2bb6e7d12452e89d7 100644 (file)
--- a/common.inc.plp
+++ b/common.inc.plp
@@ -4,18 +4,144 @@ use strict;
 use warnings;
 no  warnings 'qw';  # you know what you doing
 no  warnings 'uninitialized';  # save some useless checks for more legible code
-use open IO => ':utf8';
+use open ':std' => ':utf8';
+
+use File::stat 'stat';
+use HTTP::Date;
+
+$PLP::ERROR = sub {
+       my ($text, $html) = @_;
+       print '<p class="error"><strong>Fatal error</strong>: '.$html."</p>\n\n";
+};
 
 our $style;
+our $showkeys = !exists $get{keys} ? undef :
+       ($get{keys} ne '0' && ($get{keys} || 'always'));
 
 $header{content_type} = 'text/html; charset=utf-8';
 
 sub stylesheet {
        my %styles = map {$_ => $_} @_;
-       $style = exists $get{style} && $styles{$get{style}} || $_[0];
+
+       if (defined( my $setstyle = $get{style} )) {
+               $style = $styles{ $setstyle };
+               eval {
+                       require CGI::Cookie;
+                       my $cookie = CGI::Cookie->new(
+                               -name    => 'style',
+                               -value   => $setstyle || '',
+                               -path    => '/',  # site-wide; current page is confusing to most users
+                               -expires => $setstyle ? '+5y' : '-1d',
+                       ) or die "empty object returned\n";
+                       AddCookie($cookie->as_string);
+               } or warn "Unable to create style cookie: $@";
+       }
+
+       $style ||= exists $cookie{style} && $styles{ $cookie{style} } || $_[0];
+
        return join "\n", map { sprintf(
                '<link rel="%s" type="text/css" media="all" href="%s" title="%s">',
-               $_ eq $style ? 'stylesheet' : 'alternate stylesheet', "/$_.css", $_
+               $_ eq $style ? 'stylesheet' : 'alternate stylesheet', "/$_.css?1.8", $_
        ) } @_;
 }
 
+sub checkmodified {
+       my $lastmod;
+       for (@_) {
+               my $mod = stat $_ or next;
+               $mod = $mod->mtime or next;
+               $lastmod = $mod if $mod gt $lastmod;
+       }
+
+       for ($ENV{HTTP_IF_MODIFIED_SINCE} || ()) {
+               next if str2time($_) < $lastmod;
+               $header{status} = '304 Same old';
+               exit;
+       }
+
+       $header{'Last-Modified'} = time2str($lastmod);
+}
+
+sub Html {
+       my ($meta) = @_;
+
+       # announce and check data modification
+       checkmodified(
+               $ENV{SCRIPT_FILENAME},
+               (grep { /\bShiar_/ } values %INC),
+               $meta->{data} ? @{ $meta->{data} } : (),
+       );
+       $header{'Cache-Control'} = sprintf 'max-age: ', 24*60*60;
+
+       # default fallbacks
+       $meta->{stylesheet} ||= [qw'light dark circus mono red terse'];
+       $meta->{charset} ||= 'utf-8';
+
+       ref $_ eq 'ARRAY' or $_ = [$_] for $meta->{raw};
+
+       # optional amends
+       push @{ $meta->{raw} }, (
+               '<!--[if lte IE 6]><style> .help dl.legend dt {margin:0 0 1px} </style><![endif]-->',
+               '<!--[if lte IE 7]><style> .help dl.legend dd {float:none} </style><![endif]-->',
+               !$showkeys ? '<style type="text/css"> .no {visibility:hidden} </style>'
+                       : $showkeys eq 'ghost' ? '<style type="text/css"> .no, .alias {opacity:.5} </style>'
+                       : (),
+               '<script type="text/javascript" src="/keys.js?1.6"></script>',
+       ) if $meta->{keys};
+
+       # flatten arrays
+       ref $_ eq 'ARRAY' and $_ = join ' ',  @$_ for $meta->{description};
+       ref $_ eq 'ARRAY' and $_ = join ', ', @$_ for $meta->{keywords};
+       ref $_ eq 'ARRAY' and $_ = join "\n", @$_ for $meta->{raw};
+       ref $_ eq 'ARRAY' and $_ = stylesheet(@$_)."\n" for $meta->{stylesheet};
+
+       # other vars
+       my ($file) = $ENV{SCRIPT_FILENAME} =~ m{ ([^/]+) \.plp$ }x;
+
+       # leading output
+       $header{content_type} = "text/html; charset=$meta->{charset}";
+       print <<"EOT";
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+<meta http-equiv="content-type" content="$header{content_type}">
+<title>$meta->{title}</title>
+<meta name="description" content="$meta->{description}">
+<meta name="keywords" content="$meta->{keywords}">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<link rel="icon" type="image/png" href="/clip.png">
+EOT
+       print $_, "\n" for $meta->{stylesheet} || ();
+       print $_, "\n" for $meta->{raw} || ();
+       print qq{</head>\n\n<body id="$file">\n};
+
+       # dev indicator
+       printf '<p style="%s">beta</p>', join('; ',
+               'position: fixed',
+               'right: 1em',
+               'opacity: .5',
+               'border: 1ex solid red',
+               'border-width: 1ex 0',
+               'z-index: 1',
+               'background: inherit',
+       ) if $ENV{HTTP_HOST} =~ /\bdev\./;
+
+       # prepare trailing output
+       PLP_END {
+               print <<"EOT";
+<p class="footer">
+       <a href="/" rel="start">sheet.shiar.nl</a>/$file.<a href="/source/$file.plp"
+        rel="source" title="Written in Perl">plp</a>
+       version <a href="http://git.shiar.nl/sheet.git/history/HEAD:/$file.plp"
+        rel="vcs-git" title="Git repository">$meta->{version}</a>
+       created by <a href="http://shiar.nl/" rel="author">Shiar</a> •
+       <a href="http://www.fsf.org/licensing/licenses/agpl-3.0.html" rel="license copyright"
+        title="Licensed under the GNU Affero General Public License, version 3">AGPLv3</a>
+</p>
+
+</html>
+EOT
+       };
+}
+