Update midwinter to use hashes

include/themes/midwinter/main.css

@@ -1,22 +1,24 @@
 /* prerequisites  */
-@import url('./css/pre/fonts.css');
-@import url('./css/pre/colors.css');
-@import url('./css/pre/keyframes.css');
+@import url('./css/pre/fonts.css?a23648e6dc13c913f9ae2e993735631b');
+@import url('./css/pre/colors.css?6a3d4dc1567013fda818848070dd9939');
+@import url('./css/pre/keyframes.css?6d1d6a79b3c3bf783d25ff4a0cb83d59');
 
 /* Cacti core */
-@import url('./css/media/core.css') all;
-@import url('./css/media/print.css') print;
+@import url('./css/media/core.css?9aadb69fc9433c9f0651e07b511dff61') all;
+@import url('./css/media/print.css?f8c80271650344f45629199331592924') print;
 
 /* standard mode */
-@import url('./css/media/standard.css') screen;
-@import url('./css/media/standard-portrait.css') screen and (max-width: 600px);
-@import url('./css/media/standard-landscape.css') screen and (min-width: 601px);
+@import url('./css/media/standard.css?2458dd4d97dd94d3891b48e239ff6dd8') screen;
+@import url('./css/media/standard-portrait.css?1fc97918874907735b4ed825cbfd120c') screen and (max-width: 600px);
+@import url('./css/media/standard-landscape.css?857b8dce04e7cb60a0c06942c39fb51d') screen and (min-width: 601px);
 
 /* compact mode */
-@import url('./css/media/compact.css') screen;
-@import url('./css/media/compact-portrait.css') screen and (max-width: 600px);
-@import url('./css/media/compact-landscape.css') screen and (min-width: 601px);
+@import url('./css/media/compact.css?0bda9f47e7be64d1c2709f24cd70ba00') screen;
+@import url('./css/media/compact-portrait.css?9e14ab5e5fa525193e5cc164dc5a2e0c') screen and (max-width: 600px);
+@import url('./css/media/compact-landscape.css?3c35b3dd09c0671a596130206e72113a') screen and (min-width: 601px);
 
 /* extensions & addons */
-@import "billboard.midwinter.css";
-@import "jquery-ui.midwinter.css";
+@import url('billboard.midwinter.css?e442c55720734e56c33de67e26a596de');
+@import url('jquery-ui.midwinter.css?debef6327c75b81352f0efd40c83f809');
+
+/* End of file */

include/themes/midwinter/update_hash.php

@@ -0,0 +1,52 @@
+<?php
+
+function update_hash($file) {
+}
+
+function file_search($folder, $pattern_array) {
+	$return = array();
+	$iti = new RecursiveDirectoryIterator($folder);
+	foreach(new RecursiveIteratorIterator($iti) as $file){
+		$fileParts = explode('.', $file);
+		if (in_array(strtolower(array_pop($fileParts)), $pattern_array)){
+			$return[] = $file;
+		}
+	}
+	return $return;
+}
+
+function file_hash($match) {
+	global $cssFile;
+	$md5File = dirname($cssFile) . '/' . $match[2];
+	$md5Real = realpath($md5File);
+	$md5Hash = md5_file($md5File);
+	$result  = $match[1] . $match[2] . '?' . $md5Hash . $match[4];
+
+	return $result;
+}
+
+function file_update($cssFile) {
+	$fileContents = file($cssFile);
+	$fileUpdated  = preg_replace_callback_array(
+		[
+			'/(@import url\(\')([^?]*)(\?.*)*(\'\))/' => 'file_hash',
+			'/(@import url\(")([^?]*)(\?.*)*("\))/' => 'file_hash',
+		], $fileContents
+	);
+
+	if ($fileContents != $fileUpdated) {
+		echo "file_update(" . $cssFile . ")\n";
+		file_put_contents($cssFile, $fileUpdated);
+	}
+}
+
+global $cssFile;
+$cssFiles = file_search(__DIR__ . '/css', ['css']);
+$cssFiles[] = __DIR__ . '/main.css';
+$cssFiles[] = __DIR__ . '/billboard.midwinter.css';
+
+foreach ($cssFiles as $cssFile) {
+	file_update($cssFile);
+}
+
+echo PHP_EOL;