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<?php
/*
* GNUfault.org - GNUfault's website
* Copyright (C) 2026 Connor Thomson
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
function strip_comments(string $html): string {
return preg_replace('/<!--(?!\[if).*?-->/s', '', $html);
}
function tidy(string $html): string {
$html = preg_replace('/[^\S\n]+$/m', '', $html);
$html = preg_replace('/\n{3,}/', "\n\n", $html);
return trim($html, "\n");
}
function dedent(string $html): string {
$width = null;
foreach (explode("\n", $html) as $line) {
if (trim($line) === '') {
continue;
}
$leading = strlen($line) - strlen(ltrim($line, " \t"));
if ($width === null || $leading < $width) {
$width = $leading;
}
}
if (!$width) {
return $html;
}
return preg_replace('/^[ \t]{1,' . $width . '}/m', '', $html);
}
function indent(string $html, string $indent): string {
$html = dedent($html);
if ($indent === '') {
return $html;
}
$lines = explode("\n", $html);
foreach ($lines as $number => $line) {
if ($line !== '') {
$lines[$number] = $indent . $line;
}
}
return implode("\n", $lines);
}
function preprocess(string $html): string {
return tidy(strip_comments($html));
}
function import(string $path): string {
if (!file_exists($path)) {
return '';
}
return preprocess(file_get_contents($path));
}
?>
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