From f168cf686316022dda1345ecacb6140e5027d1b1 Mon Sep 17 00:00:00 2001
From: KingOfDog <logins@kingofdog.eu>
Date: Thu, 1 Nov 2018 11:19:02 +0100
Subject: [PATCH] Minify CSS and JS

---
 combine.php | 465 ++++++++++++++++++++++++++--------------------------
 1 file changed, 234 insertions(+), 231 deletions(-)

diff --git a/combine.php b/combine.php
index 19a62b6..0a6465c 100644
--- a/combine.php
+++ b/combine.php
@@ -1,253 +1,256 @@
 <?php
-$cache = true;
-$cachedir = dirname(__FILE__) . '/assets/cache';
-$cssdir = dirname(__FILE__) . '/assets/css';
-$jsdir = dirname(__FILE__) . '/assets/js';
+    $cache = true;
+    $cachedir = dirname(__FILE__) . '/assets/cache';
+    $cssdir = dirname(__FILE__) . '/assets/css';
+    $jsdir = dirname(__FILE__) . '/assets/js';
 
 // Determine the directory and type we should use
-switch ($_GET['type']) {
-    case 'css':
-        $base = realpath($cssdir);
-        break;
-    case 'javascript':
-        $base = realpath($jsdir);
-        break;
-    default:
-        header("HTTP/1.0 503 Not Implemented");
-        exit;
-};
+    switch ($_GET['type']) {
+        case 'css':
+            $base = realpath($cssdir);
+            break;
+        case 'javascript':
+            $base = realpath($jsdir);
+            break;
+        default:
+            header("HTTP/1.0 503 Not Implemented");
+            exit;
+    };
 
-$type = $_GET['type'];
-$elements = explode(',', $_GET['files']);
+    $type = $_GET['type'];
+    $elements = explode(',', $_GET['files']);
 
 // Determine last modification date of the files
-$lastmodified = 0;
-while (list(, $element) = each($elements)) {
-    $path = realpath($base . '/' . $element);
-
-    if (($type == 'javascript' && substr($path, -3) != '.js') ||
-        ($type == 'css' && substr($path, -4) != '.css')) {
-        header("HTTP/1.0 403 Forbidden");
-        exit;
-    }
-
-    if (substr($path, 0, strlen($base)) != $base || !file_exists($path)) {
-        header("HTTP/1.0 404 Not Found");
-        exit;
-    }
-
-    $lastmodified = max($lastmodified, filemtime($path));
-}
-
-// Send Etag hash
-$hash = $lastmodified . '-' . md5($_GET['files']);
-header("Etag: \"" . $hash . "\"");
-
-if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
-    stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"') {
-    // Return visit and no modifications, so do not send anything
-    header("HTTP/1.0 304 Not Modified");
-    header('Content-Length: 0');
-} else {
-    // First time visit or files were modified
-    if ($cache) {
-        // Determine supported compression method
-        $gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
-        $deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate');
-
-        // Determine used compression method
-        $encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');
-
-        // Check for buggy versions of Internet Explorer
-        if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') &&
-            preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
-            $version = floatval($matches[1]);
-
-            if ($version < 6)
-                $encoding = 'none';
-
-            if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1'))
-                $encoding = 'none';
-        }
-
-        // Try the cache first to see if the combined files were already generated
-        $cachefile = 'cache-' . $hash . '.' . $type . ($encoding != 'none' ? '.' . $encoding : '');
-
-        if (file_exists($cachedir . '/' . $cachefile)) {
-            if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) {
-
-                if ($encoding != 'none') {
-                    header("Content-Encoding: " . $encoding);
-                }
-
-                header("Content-Type: text/" . $type);
-                header("Content-Length: " . filesize($cachedir . '/' . $cachefile));
-
-                fpassthru($fp);
-                fclose($fp);
-                exit;
-            }
-        }
-    }
-
-    // Get contents of the files
-    $contents = '';
-    reset($elements);
+    $lastmodified = 0;
     while (list(, $element) = each($elements)) {
         $path = realpath($base . '/' . $element);
-        $contents .= "\n\n" . file_get_contents($path);
-//        $contents = fn_minify_css($contents);
+
+        if (($type == 'javascript' && substr($path, -3) != '.js') ||
+            ($type == 'css' && substr($path, -4) != '.css')) {
+            header("HTTP/1.0 403 Forbidden");
+            exit;
+        }
+
+        if (substr($path, 0, strlen($base)) != $base || !file_exists($path)) {
+            header("HTTP/1.0 404 Not Found");
+            exit;
+        }
+
+        $lastmodified = max($lastmodified, filemtime($path));
     }
 
-    // Send Content-Type
-    header("Content-Type: text/" . $type);
+// Send Etag hash
+    $hash = $lastmodified . '-' . md5($_GET['files']);
+    header("Etag: \"" . $hash . "\"");
 
-    if (isset($encoding) && $encoding != 'none') {
-        // Send compressed contents
-        $contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE);
-        header("Content-Encoding: " . $encoding);
-        header('Content-Length: ' . strlen($contents));
-        echo $contents;
+    if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
+        stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"') {
+        // Return visit and no modifications, so do not send anything
+        header("HTTP/1.0 304 Not Modified");
+        header('Content-Length: 0');
     } else {
-        // Send regular contents
-        header('Content-Length: ' . strlen($contents));
-        echo $contents;
-    }
-    echo strlen($contents);
+        // First time visit or files were modified
+        if ($cache) {
+            // Determine supported compression method
+            $gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
+            $deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate');
 
-    // Store cache
-    if ($cache) {
-        if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) {
-            fwrite($fp, $contents);
-            fclose($fp);
-        }
-    }
-}
+            // Determine used compression method
+            $encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');
 
-define('MINIFY_STRING', '"(?:[^"\\\]|\\\.)*"|\'(?:[^\'\\\]|\\\.)*\'');
-define('MINIFY_COMMENT_CSS', '/\*[\s\S]*?\*/');
-define('MINIFY_COMMENT_HTML', '<!\-{2}[\s\S]*?\-{2}>');
-define('X', "\x1A");
+            // Check for buggy versions of Internet Explorer
+            if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') &&
+                preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
+                $version = floatval($matches[1]);
 
-function n($s)
-{
-    return str_replace(["\r\n", "\r"], "\n", $s);
-}
+                if ($version < 6)
+                    $encoding = 'none';
 
-function t($a, $b)
-{
-    if ($a && strpos($a, $b) === 0 && substr($a, -strlen($b)) === $b) {
-        return substr(substr($a, strlen($b)), 0, -strlen($b));
-    }
-    return $a;
-}
-
-function fn_minify($pattern, $input)
-{
-    return preg_split('#(' . implode('|', $pattern) . ')#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
-}
-
-function fn_minify_css($input, $comment = 2, $quote = 2)
-{
-    if (!is_string($input) || !$input = n(trim($input))) return $input;
-    $output = $prev = "";
-    foreach (fn_minify([MINIFY_COMMENT_CSS, MINIFY_STRING], $input) as $part) {
-        if (trim($part) === "") continue;
-        if ($comment !== 1 && strpos($part, '/*') === 0 && substr($part, -2) === '*/') {
-            if (
-                $comment === 2 && (
-                    // Detect special comment(s) from the third character. It should be a `!` or `*` → `/*! keep */` or `/** keep */`
-                    strpos('*!', $part[2]) !== false ||
-                    // Detect license comment(s) from the content. It should contains character(s) like `@license`
-                    stripos($part, '@licence') !== false || // noun
-                    stripos($part, '@license') !== false || // verb
-                    stripos($part, '@preserve') !== false
-                )
-            ) {
-                $output .= $part;
+                if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1'))
+                    $encoding = 'none';
             }
-            continue;
-        }
-        if ($part[0] === '"' && substr($part, -1) === '"' || $part[0] === "'" && substr($part, -1) === "'") {
-            // Remove quote(s) where possible …
-            $q = $part[0];
-            if (
-                $quote !== 1 && (
-                    // <https://www.w3.org/TR/CSS2/syndata.html#uri>
-                    substr($prev, -4) === 'url(' && preg_match('#\burl\($#', $prev) ||
-                    // <https://www.w3.org/TR/CSS2/syndata.html#characters>
-                    substr($prev, -1) === '=' && preg_match('#^' . $q . '[a-zA-Z_][\w-]*?' . $q . '$#', $part)
-                )
-            ) {
-                $part = t($part, $q); // trim quote(s)
+
+            // Try the cache first to see if the combined files were already generated
+            $cachefile = 'cache-' . $hash . '.' . $type . ($encoding != 'none' ? '.' . $encoding : '');
+
+            if (file_exists($cachedir . '/' . $cachefile)) {
+                if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) {
+
+                    if ($encoding != 'none') {
+                        header("Content-Encoding: " . $encoding);
+                    }
+
+                    header("Content-Type: text/" . $type);
+                    header("Content-Length: " . filesize($cachedir . '/' . $cachefile));
+
+                    fpassthru($fp);
+                    fclose($fp);
+                    exit;
+                }
             }
-            $output .= $part;
+        }
+
+        // Get contents of the files
+        $contents = '';
+        reset($elements);
+        while (list(, $element) = each($elements)) {
+            $path = realpath($base . '/' . $element);
+            $contents .= "\n\n" . file_get_contents($path);
+            $contents = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $contents);
+            $contents = str_replace(': ', ':', $contents);
+            $contents = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $contents);
+//        $contents = fn_minify_css($contents);
+        }
+
+        // Send Content-Type
+        header("Content-Type: text/" . $type);
+
+        if (isset($encoding) && $encoding != 'none') {
+            // Send compressed contents
+            $contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE);
+            header("Content-Encoding: " . $encoding);
+            header('Content-Length: ' . strlen($contents));
+            echo $contents;
         } else {
-            $output .= fn_minify_css_union($part);
+            // Send regular contents
+            header('Content-Length: ' . strlen($contents));
+            echo $contents;
         }
-        $prev = $part;
-    }
-    return trim($output);
-}
+        echo strlen($contents);
 
-function fn_minify_css_union($input)
-{
-    if (stripos($input, 'calc(') !== false) {
-        // Keep important white–space(s) in `calc()`
-        $input = preg_replace_callback('#\b(calc\()\s*(.*?)\s*\)#i', function ($m) {
-            return $m[1] . preg_replace('#\s+#', X, $m[2]) . ')';
-        }, $input);
+        // Store cache
+        if ($cache) {
+            if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) {
+                fwrite($fp, $contents);
+                fclose($fp);
+            }
+        }
     }
-    $input = preg_replace([
-        // Fix case for `#foo<space>[bar="baz"]`, `#foo<space>*` and `#foo<space>:first-child` [^1]
-        '#(?<=[\w])\s+(\*|\[|:[\w-]+)#',
-        // Fix case for `[bar="baz"]<space>.foo`, `*<space>.foo`, `:nth-child(2)<space>.foo` and `@media<space>(foo: bar)<space>and<space>(baz: qux)` [^2]
-        '#([*\]\)])\s+(?=[\w\#.])#', '#\b\s+\(#', '#\)\s+\b#',
-        // Minify HEX color code … [^3]
-        '#\#([a-f\d])\1([a-f\d])\2([a-f\d])\3\b#i',
-        // Remove white–space(s) around punctuation(s) [^4]
-        '#\s*([~!@*\(\)+=\{\}\[\]:;,>\/])\s*#',
-        // Replace zero unit(s) with `0` [^5]
-        '#\b(?<!\d\.)(?:0+\.)?0+(?:[a-z]+\b)#i',
-        // Replace `0.6` with `.6` [^6]
-        '#\b0+\.(\d+)#',
-        // Replace `:0 0`, `:0 0 0` and `:0 0 0 0` with `:0` [^7]
-        '#:(0\s+){0,3}0(?=[!,;\)\}]|$)#',
-        // Replace `background(?:-position)?:(0|none)` with `background$1:0 0` [^8]
-        '#\b(background(?:-position)?):(?:0|none)([;,\}])#i',
-        // Replace `(border(?:-radius)?|outline):none` with `$1:0` [^9]
-        '#\b(border(?:-radius)?|outline):none\b#i',
-        // Remove empty selector(s) [^10]
-        '#(^|[\{\}])(?:[^\{\}]+)\{\}#',
-        // Remove the last semi–colon and replace multiple semi–colon(s) with a semi–colon [^11]
-        '#;+([;\}])#',
-        // Replace multiple white–space(s) with a space [^12]
-        '#\s+#'
-    ], [
-        // [^1]
-        X . '$1',
-        // [^2]
-        '$1' . X, X . '(', ')' . X,
-        // [^3]
-        '#$1$2$3',
-        // [^4]
-        '$1',
-        // [^5]
-        '0',
-        // [^6]
-        '.$1',
-        // [^7]
-        ':0',
-        // [^8]
-        '$1:0 0$2',
-        // [^9]
-        '$1:0',
-        // [^10]
-        '$1',
-        // [^11]
-        '$1',
-        // [^12]
-        ' '
-    ], $input);
-    return trim(str_replace(X, ' ', $input));
-}
\ No newline at end of file
+
+    define('MINIFY_STRING', '"(?:[^"\\\]|\\\.)*"|\'(?:[^\'\\\]|\\\.)*\'');
+    define('MINIFY_COMMENT_CSS', '/\*[\s\S]*?\*/');
+    define('MINIFY_COMMENT_HTML', '<!\-{2}[\s\S]*?\-{2}>');
+    define('X', "\x1A");
+
+    function n($s)
+    {
+        return str_replace(["\r\n", "\r"], "\n", $s);
+    }
+
+    function t($a, $b)
+    {
+        if ($a && strpos($a, $b) === 0 && substr($a, -strlen($b)) === $b) {
+            return substr(substr($a, strlen($b)), 0, -strlen($b));
+        }
+        return $a;
+    }
+
+    function fn_minify($pattern, $input)
+    {
+        return preg_split('#(' . implode('|', $pattern) . ')#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
+    }
+
+    function fn_minify_css($input, $comment = 2, $quote = 2)
+    {
+        if (!is_string($input) || !$input = n(trim($input))) return $input;
+        $output = $prev = "";
+        foreach (fn_minify([MINIFY_COMMENT_CSS, MINIFY_STRING], $input) as $part) {
+            if (trim($part) === "") continue;
+            if ($comment !== 1 && strpos($part, '/*') === 0 && substr($part, -2) === '*/') {
+                if (
+                    $comment === 2 && (
+                        // Detect special comment(s) from the third character. It should be a `!` or `*` → `/*! keep */` or `/** keep */`
+                        strpos('*!', $part[2]) !== false ||
+                        // Detect license comment(s) from the content. It should contains character(s) like `@license`
+                        stripos($part, '@licence') !== false || // noun
+                        stripos($part, '@license') !== false || // verb
+                        stripos($part, '@preserve') !== false
+                    )
+                ) {
+                    $output .= $part;
+                }
+                continue;
+            }
+            if ($part[0] === '"' && substr($part, -1) === '"' || $part[0] === "'" && substr($part, -1) === "'") {
+                // Remove quote(s) where possible …
+                $q = $part[0];
+                if (
+                    $quote !== 1 && (
+                        // <https://www.w3.org/TR/CSS2/syndata.html#uri>
+                        substr($prev, -4) === 'url(' && preg_match('#\burl\($#', $prev) ||
+                        // <https://www.w3.org/TR/CSS2/syndata.html#characters>
+                        substr($prev, -1) === '=' && preg_match('#^' . $q . '[a-zA-Z_][\w-]*?' . $q . '$#', $part)
+                    )
+                ) {
+                    $part = t($part, $q); // trim quote(s)
+                }
+                $output .= $part;
+            } else {
+                $output .= fn_minify_css_union($part);
+            }
+            $prev = $part;
+        }
+        return trim($output);
+    }
+
+    function fn_minify_css_union($input)
+    {
+        if (stripos($input, 'calc(') !== false) {
+            // Keep important white–space(s) in `calc()`
+            $input = preg_replace_callback('#\b(calc\()\s*(.*?)\s*\)#i', function ($m) {
+                return $m[1] . preg_replace('#\s+#', X, $m[2]) . ')';
+            }, $input);
+        }
+        $input = preg_replace([
+            // Fix case for `#foo<space>[bar="baz"]`, `#foo<space>*` and `#foo<space>:first-child` [^1]
+            '#(?<=[\w])\s+(\*|\[|:[\w-]+)#',
+            // Fix case for `[bar="baz"]<space>.foo`, `*<space>.foo`, `:nth-child(2)<space>.foo` and `@media<space>(foo: bar)<space>and<space>(baz: qux)` [^2]
+            '#([*\]\)])\s+(?=[\w\#.])#', '#\b\s+\(#', '#\)\s+\b#',
+            // Minify HEX color code … [^3]
+            '#\#([a-f\d])\1([a-f\d])\2([a-f\d])\3\b#i',
+            // Remove white–space(s) around punctuation(s) [^4]
+            '#\s*([~!@*\(\)+=\{\}\[\]:;,>\/])\s*#',
+            // Replace zero unit(s) with `0` [^5]
+            '#\b(?<!\d\.)(?:0+\.)?0+(?:[a-z]+\b)#i',
+            // Replace `0.6` with `.6` [^6]
+            '#\b0+\.(\d+)#',
+            // Replace `:0 0`, `:0 0 0` and `:0 0 0 0` with `:0` [^7]
+            '#:(0\s+){0,3}0(?=[!,;\)\}]|$)#',
+            // Replace `background(?:-position)?:(0|none)` with `background$1:0 0` [^8]
+            '#\b(background(?:-position)?):(?:0|none)([;,\}])#i',
+            // Replace `(border(?:-radius)?|outline):none` with `$1:0` [^9]
+            '#\b(border(?:-radius)?|outline):none\b#i',
+            // Remove empty selector(s) [^10]
+            '#(^|[\{\}])(?:[^\{\}]+)\{\}#',
+            // Remove the last semi–colon and replace multiple semi–colon(s) with a semi–colon [^11]
+            '#;+([;\}])#',
+            // Replace multiple white–space(s) with a space [^12]
+            '#\s+#'
+        ], [
+            // [^1]
+            X . '$1',
+            // [^2]
+            '$1' . X, X . '(', ')' . X,
+            // [^3]
+            '#$1$2$3',
+            // [^4]
+            '$1',
+            // [^5]
+            '0',
+            // [^6]
+            '.$1',
+            // [^7]
+            ':0',
+            // [^8]
+            '$1:0 0$2',
+            // [^9]
+            '$1:0',
+            // [^10]
+            '$1',
+            // [^11]
+            '$1',
+            // [^12]
+            ' '
+        ], $input);
+        return trim(str_replace(X, ' ', $input));
+    }
\ No newline at end of file