From fc5f40bd059207b985d4b82fa1d4433b3a225b08 Mon Sep 17 00:00:00 2001
From: emkael <emkael@tlen.pl>
Date: Thu, 14 Apr 2016 13:31:39 +0200
Subject:  * compiling minified JS files in Performance mode

---
 app/php/application.xml                    |   4 +-
 app/php/components/ClientScriptManager.php | 168 +++++++++++++++++++++++++++++
 2 files changed, 171 insertions(+), 1 deletion(-)
 create mode 100644 app/php/components/ClientScriptManager.php

diff --git a/app/php/application.xml b/app/php/application.xml
index 8b76f74..7c976e5 100644
--- a/app/php/application.xml
+++ b/app/php/application.xml
@@ -9,7 +9,9 @@
   <include file="Application.controls.config" />
 
   <services>
-    <service id="page" class="TPageService" />
+    <service id="page"
+             class="TPageService"
+             ClientScriptManagerClass="Application.components.ClientScriptManager" />
   </services>
 
   <modules>
diff --git a/app/php/components/ClientScriptManager.php b/app/php/components/ClientScriptManager.php
new file mode 100644
index 0000000..64e5b58
--- /dev/null
+++ b/app/php/components/ClientScriptManager.php
@@ -0,0 +1,168 @@
+<?php
+
+class ClientScriptManager extends TClientScriptManager {
+
+    private $_page;
+    public function __construct(TPage $page) {
+        $this->_page = $page;
+        parent::__construct($page);
+    }
+
+    private function _getBasePath() {
+        $assetManager = $this->Application->AssetManager;
+        return preg_replace(
+            '#' . preg_quote($assetManager->BaseUrl) . '$#',
+            '',
+            $assetManager->BasePath
+        );
+    }
+
+    private function _getBasePaths($urls) {
+        $basePath = $this->_getBasePath();
+        return array_map(
+            function($path) use($basePath) {
+                return $basePath . DIRECTORY_SEPARATOR . $path;
+            },
+            $urls
+        );
+    }
+
+    private function _getCachePath($subdir = 'assets') {
+        $cachePath = $this->Application->RuntimePath
+            . DIRECTORY_SEPARATOR
+            . $subdir;
+        if (!is_dir($cachePath)) {
+            if (file_exists($cachePath)) {
+                throw new TIOException(
+                    'Client script manager cache path "'
+                    . $cachePath
+                    . ' "exists and is not a directory'
+                );
+            } else {
+                mkdir($cachePath);
+            }
+        }
+        return $cachePath;
+    }
+
+    private function _getCacheFilePath($path, $type) {
+        return $this->_getCachePath($type)
+            . DIRECTORY_SEPARATOR
+            . $path;
+    }
+
+    private function _getFileCollectionCacheKey($files) {
+        sort($files);
+        return md5(implode(PHP_EOL, $files));
+    }
+
+    private function _getFileCollectionMTime($files) {
+        return max(array_map('filemtime', $files));
+    }
+
+    private $_renderedScriptsInitialized = FALSE;
+
+    private function _getRenderedScripts() {
+        if ($this->_page->IsCallBack || $this->_renderedScriptsInitialized) {
+            return $this->Session->itemAt('RenderedScripts') ?: [];
+        } else {
+            $this->Session->remove('RenderedScripts');
+            $this->_renderedScriptsInitialized = TRUE;
+            return [];
+        }
+    }
+
+    private function _appendRenderedScripts(array $newScripts, $compiledFileKey) {
+        $scripts = $this->_getRenderedScripts();
+        if (!isset($scripts[$compiledFileKey])) {
+            $scripts[$compiledFileKey] = [];
+        }
+        $scripts[$compiledFileKey] = array_unique(
+            array_merge(
+                $scripts[$compiledFileKey],
+                $newScripts
+            )
+        );
+        $this->Session->add('RenderedScripts', $scripts);
+    }
+
+    private function _compileFiles($files) {
+        foreach ($files as $file) {
+            $this->markScriptFileAsRendered($file);
+        }
+        $paths = $this->_getBasePaths($files);
+        $cacheKey = $this->_getFileCollectionCacheKey($paths);
+        $cacheFile = $this->_getCacheFilePath($cacheKey . '.js', 'scripts');
+        $this->_appendRenderedScripts($files, $cacheFile);
+        if (!file_exists($cacheFile)
+            || (filemtime($cacheFile)
+                < $this->_getFileCollectionMTime($paths))) {
+            $scriptContent = implode(
+                PHP_EOL,
+                array_map('file_get_contents', $paths)
+            );
+            file_put_contents($cacheFile, $scriptContent);
+        }
+        return $this->Application->AssetManager->publishFilePath($cacheFile);
+    }
+
+    public function renderScriptFiles($writer, Array $files) {
+        if ($this->getApplication()->getMode() !== TApplicationMode::Debug) {
+            if ($files) {
+                $assetPath = $this->_compileFiles($files);
+                $writer->write(TJavascript::renderScriptFile($assetPath));
+            }
+        } else {
+            parent::renderScriptFiles($writer, $files);
+        }
+    }
+
+    public function getScriptUrls() {
+        if ($this->getApplication()->getMode() !== TApplicationMode::Debug) {
+            $registeredScripts = array_unique(
+                array_merge(
+                    $this->_scripts, $this->_headScripts
+                )
+            );
+            $renderedScripts = $this->_getRenderedScripts();
+            $scriptUrls = [];
+            $newScripts = [];
+            foreach ($registeredScripts as $registeredScript) {
+                $found = FALSE;
+                foreach ($renderedScripts as $compiledFile => $scripts) {
+                    if (in_array($registeredScript, $scripts)) {
+                        $scriptUrls[] = $this->Application->AssetManager->getPublishedUrl(
+                            $compiledFile
+                        );
+                        $found = TRUE;
+                    }
+                }
+                if (!$found) {
+                    $newScripts[] = $registeredScript;
+                }
+            }
+            if ($newScripts) {
+                $scriptUrls[] = $this->_compileFiles($newScripts);
+            }
+            return $scriptUrls;
+        } else {
+            return parent::getScriptUrls();
+        }
+    }
+
+    private $_scripts = [];
+    private $_headScripts = [];
+
+    public function registerScriptFile($key, $file) {
+        $this->_scripts[$key] = $file;
+        return parent::registerScriptFile($key, $file);
+    }
+
+    public function registerHeadScriptFile($key, $file) {
+        $this->_headScripts[$key] = $file;
+        return parent::registerHeadScriptFile($key, $file);
+    }
+
+}
+
+?>
-- 
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