oidplus.min.css.php

<?php

/*
 * OIDplus 2.0
 * Copyright 2019 - 2024 Daniel Marschall, ViaThinkSoft
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use ViaThinkSoft\OIDplus\Core\OIDplus;
use ViaThinkSoft\OIDplus\Core\OIDplusDesignPlugin;
use MatthiasMullie\Minify;

require_once __DIR__ . '/includes/oidplus.inc.php';

error_reporting(OIDplus::baseConfig()->getValue('DEBUG') ? E_ALL : 0);
@ini_set('display_errors', OIDplus::baseConfig()->getValue('DEBUG') ? '1' : '0');

$files = array();

# ---

$req_file = ($_REQUEST["file"] ?: "base");
if ($req_file != "base") {
	$do_minify = false;
	$inc_file = realpath(__DIR__ . DIRECTORY_SEPARATOR . $req_file);
	if (!str_starts_with($inc_file, __DIR__ . DIRECTORY_SEPARATOR) || !str_ends_with($inc_file, ".css")) {
		http_response_code(404);
	} else {
		$files[] = $inc_file;
	}
} else {
	$do_minify = OIDplus::baseConfig()->getValue('MINIFY_CSS', true);

	// Loading animation CSS
	$files[] = __DIR__ . '/includes/loading.css';

	// Find out base CSS
	if (isset($_GET['theme'])) {
		$theme = $_GET['theme'];
		if (strpos($theme,'/') !== false) $theme = 'default';
		if (strpos($theme,'\\') !== false) $theme = 'default';
		if (strpos($theme,'..') !== false) $theme = 'default';
	} else {
		$theme = 'default';
	}

	if (file_exists($fil = OIDplus::getUserDataDir("styles").'oidplus_base.css')) {
		// There is a user defined CSS (not recommended, use design plugins instead!)
		$files[] = $fil;
	} else {
		// Use CSS of the design plugin
		OIDplus::registerAllPlugins('design', OIDplusDesignPlugin::class, array(OIDplus::class,'registerDesignPlugin'));
		$plugins = OIDplus::getDesignPlugins();
		foreach ($plugins as $plugin) {
			if ($plugin->id() == $theme) {
				$manifest = $plugin->getManifest();
				foreach ($manifest->getCSSFiles() as $css_file) {
					$files[] = $css_file;
				}
			}
		}
	}

	// Then plugins
	$manifests = OIDplus::getAllPluginManifests(implode(',',OIDplus::INTERACTIVE_PLUGIN_TYPES), true); // due to interface gridGeneratorLinks (INTF_OID_1_3_6_1_4_1_37476_2_5_2_3_6) this plugin type can also have CSS
	foreach ($manifests as $manifest) {
		foreach ($manifest->getCSSFiles() as $css_file) {
			$files[] = $css_file;
		}
	}

	// Now user-defined (additional) definitions
	if (file_exists($fil = OIDplus::getUserDataDir("styles").'oidplus_add.css')) {
		$files[] = $fil;
	}
}

# ---

$out = "";

foreach ($files as $file) {
	$out .= process_file($file);
}

$inv = $_GET['invert'] ?? 0;
if ($inv != 0) {
	$out = invertColorsOfCSS($out);
}

$hs = $_GET['h_shift'] ?? 0;
$ss = $_GET['s_shift'] ?? 0;
$vs = $_GET['v_shift'] ?? 0;
if (($hs != 0) ||($ss != 0) || ($vs != 0)) {
	$out = changeHueOfCSS($out, $hs, $ss, $vs);
}

# ---

if (OIDplus::baseConfig()->getValue('DEBUG')) {
	// In debug mode, we might get PHP error messages (see "error_reporting" above),
	// so it would be severe if we would allow ETAG! (since $out does not contain the PHP error messages!)
	header('Content-Type:text/css');
	echo $out;
} else {
	httpOutWithETag($out, 'text/css', 'oidplus_'.sha1($req_file).'.css');
}

# ---

/**
* @param string $filename
* @return string
 */
function process_file(string $filename): string {
	global $do_minify;

	$filename_min = preg_replace('/\.[^.]+$/', '.min.css', $filename);
	$filename_full = $filename;

	if ($do_minify) {
		if (file_exists($filename_min)) {
			// There is a file which is already minified
			$filename = $filename_min;
			$cont = file_get_contents($filename);
		} else if (file_exists($filename_full)) {
			// Otherwise, we minify it ourself
			$filename = $filename_full;
			$minifier = new Minify\CSS($filename);
			$cont = $minifier->minify();
		} else {
			return '';
		}
	} else {
		if (file_exists($filename_full)) {
			$filename = $filename_full;
			$cont = file_get_contents($filename);
		} else if (file_exists($filename_min)) {
			$filename = $filename_min;
			$cont = file_get_contents($filename);
		} else {
			return '';
		}
	}

	$thisdir = __DIR__;
	$thisdir = str_replace('\\', '/', $thisdir); // change Windows Backslashes into Web-Slashes
	$filename = str_replace('\\', '/', $filename); // change Windows Backslashes into Web-Slashes
	$dir = dirname((strpos($filename, $thisdir.'/') === 0) ? substr($filename, strlen($thisdir.'/')) : $filename);

	$cont = preg_replace('@url\\(\s+@im', 'url(', $cont);
	$cont = str_ireplace('url("data:', 'url###("data:', $cont);
	$cont = str_ireplace('url("', 'url###("'.$dir.'/', $cont);
	$cont = str_ireplace("url('data:", "url###('data:", $cont);
	$cont = str_ireplace("url('", "url###('".$dir.'/', $cont);
	$cont = str_ireplace("url(data:", "url###(data:", $cont);
	$cont = str_ireplace("url(", "url###(".$dir.'/', $cont);
	$cont = str_ireplace("url###(", "url(", $cont);
	return $cont."\n\n";
}