Added file combiner and minification for prod deployment

_config/controller.yml

@@ -35,6 +35,9 @@ SilverStripe\CMS\Controllers\ContentController:
   load_themed_css: false
   load_custom_css: true
   disable_cache: true
+  combine_files: true
+  combined_js: combined.js
+  combined_css: combined.css
 
 ---
 Name: silverware-controller-live

src/Extensions/ControllerExtension.php

@@ -19,6 +19,7 @@
 
 use SilverStripe\CMS\Controllers\ContentController;
 use SilverStripe\Control\Director;
+use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Extension;
 use SilverStripe\Security\Security;
@@ -125,6 +126,103 @@ public function onBeforeInit()
         $this->initRequirements();
     }
 
+    /**
+     * Answers an array of all JavaScript files required by the content controllers of the app.
+     *
+     * @return array
+     */
+    public function getRequiredJSFiles()
+    {
+        $files = [];
+
+        foreach (ClassInfo::subclassesFor(ContentController::class) as $controller) {
+
+            if ($required_js = Config::inst()->get($controller, 'required_js')) {
+
+                foreach ($required_js as $file) {
+
+                    if (!isset($files[$file])) {
+                        $files[$file] = file_get_contents(Director::getAbsFile($file));
+                    }
+
+                }
+
+            }
+
+        }
+
+        return $files;
+    }
+
+    /**
+    /**
+     * Answers an array of all CSS files required by the content controllers of the app.
+     *
+     * @return array
+     */
+    public function getRequiredCSSFiles()
+    {
+        $files = [];
+
+        foreach (ClassInfo::subclassesFor(ContentController::class) as $controller) {
+
+            if ($required_css = Config::inst()->get($controller, 'required_css')) {
+
+                foreach ($required_css as $file) {
+
+                    if (!isset($files[$file])) {
+                        $files[$file] = file_get_contents(Director::getAbsFile($file));
+                    }
+
+                }
+
+            }
+
+        }
+
+        return $files;
+    }
+
+    /**
+     * Answers the custom CSS required for the template as a string.
+     *
+     * @return string
+     */
+    public function getCustomCSSAsString()
+    {
+        // Create CSS Array:
+
+        $css = [];
+
+        // Merge Custom CSS from Page Controller:
+
+        if ($this->owner instanceof PageController) {
+            $css = array_merge($css, $this->owner->getCustomCSS());
+        }
+
+        // Create CSS String:
+
+        $css = implode("\n", $css);
+
+        // Remove Empty Lines:
+
+        $css = ViewTools::singleton()->removeEmptyLines($css);
+
+        // Trim CSS String:
+
+        $css = trim($css);
+
+        // Minify CSS String:
+
+        if (!Director::isDev()) {
+            $css = ViewTools::singleton()->minifyCSS($css);
+        }
+
+        // Answer CSS String:
+
+        return $css;
+    }
+
     /**
      * Answers true if a webpack development server is currently being used.
      *
@@ -281,6 +379,10 @@ protected function initRequirements()
             }
 
         }
+
+        // Combine Files (dev only):
+
+        $this->combineFiles();
     }
 
     /**
@@ -378,40 +480,6 @@ protected function loadCustomCSS($css)
         Requirements::customCSS($css);
     }
 
-    /**
-     * Answers the custom CSS required for the template as a string.
-     *
-     * @return string
-     */
-    public function getCustomCSSAsString()
-    {
-        // Create CSS Array:
-
-        $css = [];
-
-        // Merge Custom CSS from Page Controller:
-
-        if ($this->owner instanceof PageController) {
-            $css = array_merge($css, $this->owner->getCustomCSS());
-        }
-
-        // Create CSS String:
-
-        $css = implode("\n", $css);
-
-        // Remove Empty Lines:
-
-        $css = ViewTools::singleton()->removeEmptyLines($css);
-
-        // Trim CSS String:
-
-        $css = trim($css);
-
-        // Answer CSS String:
-
-        return $css;
-    }
-
     /**
      * Loads the themed JavaScript with the given name.
      *
@@ -444,6 +512,27 @@ protected function loadThemedCSS($name)
         }
     }
 
+    /**
+     * Combines required files together for bundling with the theme.
+     *
+     * @return void
+     */
+    protected function combineFiles()
+    {
+        if (Director::isDev() && $this->owner->config()->combine_files) {
+
+            // Obtain Tools:
+
+            $tools = ViewTools::singleton();
+
+            // Combine Files:
+
+            $tools->combineFiles($this->owner->config()->combined_js,  $this->owner->getRequiredJSFiles());
+            $tools->combineFiles($this->owner->config()->combined_css, $this->owner->getRequiredCSSFiles());
+
+        }
+    }
+
     /**
      * Applies the given extension to the given file name if it is not already present.
      *

src/Tools/ViewTools.php

@@ -17,6 +17,7 @@
 
 namespace SilverWare\Tools;
 
+use SilverStripe\Assets\File;
 use SilverStripe\Control\Director;
 use SilverStripe\Core\Convert;
 use SilverStripe\Core\Injector\Injectable;
@@ -138,6 +139,61 @@ public function loadJSTemplate($file, $vars, $uniquenessID = null)
         Requirements::customScript($script, $uniquenessID);
     }
 
+    /**
+     * Combines the given array of files into a single file within the specified name and answers the URL.
+     *
+     * @param string $name
+     * @param array $files
+     *
+     * @return string
+     */
+    public function combineFiles($name, $files)
+    {
+        $backend = Requirements::backend();
+
+        $path = File::join_paths($backend->getCombinedFilesFolder(), $name);
+
+        return $backend->getAssetHandler()->getContentURL($path, function () use ($files) {
+
+            $output = [];
+
+            foreach ($files as $file => $data) {
+                $output[] = "/***** FILE: $file *****/";
+                $output[] = $data;
+            }
+
+            return implode("\n", $output);
+
+        });
+    }
+
+    /**
+     * Minifies and wraps the given string of CSS.
+     *
+     * @param string $css
+     * @param integer $wrap
+     *
+     * @return string
+     */
+    public function minifyCSS($css, $wrap = 200)
+    {
+        // Remove Comments:
+
+        $css = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $css);
+
+        // Remove Space Following Colons:
+
+        $css = str_replace(': ', ':', $css);
+
+        // Remove Whitespace:
+
+        $css = str_replace(["\r\n", "\r", "\n", "\t", '  ', '    ', '    '], '', $css);
+
+        // Wrap and Answer:
+
+        return wordwrap($css, $wrap);
+    }
+
     /**
      * Converts the given associative array of attributes to a string of HTML.
      *

src/View/Renderable.php

@@ -641,6 +641,12 @@ public function getCustomCSSAsString()
 
         $css = trim($css);
 
+        // Minify CSS String:
+
+        if (!Director::isDev()) {
+            $css = ViewTools::singleton()->minifyCSS($css);
+        }
+
         // Answer CSS String:
 
         return $css;