X-Git-Url: http://git.shiar.net/sheet.git/blobdiff_plain/28151a28db84c6d6018232f36c0003ecd562b3f0..HEAD:/common.inc.plp

diff --git a/common.inc.plp b/common.inc.plp
index 576e39c..a634733 100644
--- a/common.inc.plp
+++ b/common.inc.plp
@@ -1,21 +1,246 @@
 <:
-use utf8;
+use 5.014;
 use strict;
+use utf8;
 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;
+use Encode qw( decode_utf8 );
+
+our $Dev;
+
+sub Alert {
+	my ($html, $debug) = @_;
+	ref $html eq 'ARRAY' or $html = [$html];
+	my ($title, @lines) = @{$html};
+	my $body = "<h2>$title</h2>";
+	$body .= "\n<p>$_</p>" for @lines;
+	$body .= "\n<pre>$debug</pre>" if $Dev and $debug;
+	say "<div class=error>$body</div>\n";
+}
+
+sub Abort {
+	my ($html, $code, $debug) = @_;
+	unless ($PLP::sentheaders) {
+		$header{Status} = $code || 500;
+	}
+	elsif ($Dev) {
+		ref $html eq 'ARRAY' or $html = [$html];
+		push @{$html}, "Also failed to set HTTP status <q>$code</q>"
+			. " after output!";
+	}
+	Alert($html, $debug);
+	exit;
+}
+
+BEGIN {
+	require Time::HiRes;
+	our $Time = [Time::HiRes::gettimeofday()];
+
+	push @INC, '.';
+
+	# user request
+	our $Dev = $ENV{HTTP_HOST} =~ /\bdev\./;
+}
+
+our $Request //= decode_utf8($ENV{PATH_INFO} =~ s{^/}{}r);
 
 our $style;
 
 $header{content_type} = 'text/html; charset=utf-8';
 
 sub stylesheet {
-	my %styles = map {$_ => $_} @_;
-	$style = exists $get{style} && $styles{$get{style}} || $_[0];
-	return join "\n", map { sprintf(
+	my ($avail) = @_;
+	my @avail = ref $avail eq 'ARRAY' ? @{$avail} : $avail or return;
+	my %styles = map {$_ => $_} @avail;
+
+	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
+				-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} } || $avail[0];
+
+	return 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?1.18", $_
+	) } @avail;
+}
+
+sub checkmodified {
+	my $lastmod = 0;
+	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 Data {
+	my ($filename) = @_;
+	my @data = eval {
+		open my $cache, '<:raw', "data/$filename.json"
+			or return do "./$filename.inc.pl"; # silent fallback to original code
+		require JSON;
+		local $/; # slurp
+		return JSON::decode_json(readline $cache);
+	};
+	if ($@ or !@data or !$data[0]) {
+		die ['Table data not found', $@ || $!];
+	}
+	if (@data == 1 and ref $data[0] eq 'HASH' and not %{$data[0]}) {
+		die ['Table data missing'];
+	}
+	return wantarray ? @data : $data[0]; # list compatibility like do does
+}
+
+sub Html {
+	my ($meta) = @_;
+
+	unless ($meta->{nocache}) {
+		# announce and check data modification
+		checkmodified(
+			$ENV{SCRIPT_FILENAME},
+			(grep { /\bShiar_/ } values %INC),
+			$meta->{data} ? @{ $meta->{data} } : (),
+		);
+		$header{'Cache-Control'} = 'max-age='.(24*60*60);
+	}
+
+	# default fallbacks
+	$meta->{stylesheet} ||= [qw( light dark circus mono red )];
+	$meta->{charset} ||= 'utf-8';
+	$meta->{lang} ||= 'en';
+
+	# convert options to arrays
+	ref $_ eq 'ARRAY' or $_ = [$_]
+		for grep {$_} $meta->{raw}, $meta->{description}, $meta->{keywords};
+
+	# document headers before output
+	$header{content_type} = "text/html; charset=$meta->{charset}"
+		unless $PLP::sentheaders;
+	exit if $ENV{REQUEST_METHOD} eq 'HEAD';
+	unshift @{ $meta->{raw} }, stylesheet($meta->{stylesheet});
+
+	push @{ $meta->{raw} }, (
+		'<link rel="stylesheet" type="text/css" media="monochrome" href="/mono.css?1.11" title="light">',
+	);
+
+	if (my $img = $meta->{image}) {
+		my $proto = sprintf('http%s://', !!$ENV{HTTPS} && 's');
+		my $url = "$proto$ENV{HTTP_HOST}/$img";
+		push @{ $meta->{raw} }, (
+			qq(<meta property="og:image" content="$url" />),
+		);
+	}
+
+	my ($file) = $ENV{SCRIPT_FILENAME} =~ m{ ([^/]+) \.plp$ }x;
+
+	$meta->{canonical} //= "/$file" . ($Request ne '' && "/$Request");
+	if (my $url = $meta->{canonical}) {
+		$url = "https://sheet.shiar.nl$url";
+		push @{ $meta->{raw} }, qq(<link rel="canonical" href="$url" />);
+	}
+
+	PLP_START {
+		# leading output
+		say '<!DOCTYPE html>';
+		say qq(<html lang="$meta->{lang}">);
+		say '';
+		say '<head>';
+		say sprintf '<meta http-equiv="content-type" content="%s">', $_
+			for $header{content_type};
+		say sprintf '<title>%s</title>', $meta->{title};
+		say sprintf '<meta name="description" content="%s">', EscapeHTML($_)
+			for join(' ', @{ $meta->{description} // [] }) || ();
+		say sprintf '<meta name="keywords" content="%s">', EscapeHTML($_)
+			for join(', ', @{ $meta->{keywords} // [] }) || ();
+		say '<meta name="viewport" content="width=device-width, initial-scale=1">';
+		say '<link rel="icon" type="image/png" href="/clip.png">';
+		say for map { @{$_} } $meta->{raw} || ();
+		say '<meta name="robots" content="noindex">' if $Dev;
+		say '</head>';
+		say '';
+		say sprintf '<body id="%s">', $file;
+
+		# development version 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 $Dev;
+	};
+
+	# prepare trailing output
+	PLP_END {
+		print <<"EOT";
+<p class="footer">
+	<a href="/" rel="start">sheet.shiar.nl</a>/$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"
+	 title="Licensed under the GNU Affero General Public License, version 3"
+	 rel="license">AGPLv3</a>
+EOT
+		our $Time;
+		say sprintf '• %.3fs', Time::HiRes::tv_interval($Time) if $Dev and $Time;
+		say '</p>';
+		say '';
+		say '</html>';
+	};
+}
+
+BEGIN {
+	$PLP::ERROR = sub {
+		my ($message, $html) = @_;
+		if (ref $message) {
+			warn join ': ', @{$message};
+			$html = shift @{$message};
+		}
+		else {
+			warn $message;
+			$message = [];
+		}
+		unless ($PLP::sentheaders) {
+			Html({nocache => 1});
+			say '<h1>Page unavailable</h1>';
+		}
+		Alert("Fatal error: $html.", @{$message});
+	};
+}
+
+sub showlink {
+	my ($title, $href, $selected) = @_;
+	EscapeHTML($title);
+	return $title if not $href;
+	return "<strong>$title</strong>" if $selected;
+	return sprintf '<a href="%s">%s</a>', EscapeHTML($href), $title;
 }