Merge branch 'release/0.2.0'

Author: punkstar

README.md

@@ -1,6 +1,36 @@
-Mage-Cache-Viewer
-=================
+# Meanbee_CacheViewer
 
-View the status of Magento Caches
+Meanbee_CacheViewer provides interfaces for inspecting Magento cache.
 
-Access from System > Cache Management > View Cache Statistics.
+## Usage
+
+### Analysing Block Cache
+
+Enabled with a configuration setting in `System` » `Configuration` » `Cache Viewer`, the frontend overlay indicates
+which blocks were generated (red) and which were retrieved from the block_html cache (green) as well as showing the
+last modified time for each block and the total time taken to dispatch the request.
+
+This will become enabled for the frontend and the admin area and is controlled by the control bar added at the bottom of the viewport.
+
+![Cache Viewer frontend overlay](http://f.cl.ly/items/0F2D0s3c0I34210z1e3S/cache-viewer-frontend.png)
+
+![Cache Viewer frontend overlay with hints disabled](http://f.cl.ly/items/0N2t3R0R2a232R3w191L/cache-viewer-frontend-nohints.png)
+
+### View Cache Contents
+
+The backend interface, found in `System` » `Cache Management` » `View Cache Contents` in the Administration area, allows
+viewing, inspecting or deleting all of the cache entries present in the Magento cache.
+
+![Cache Viewer](http://up.nicksays.co.uk/image/0C1W29041R3y/release_0.1.0.png)
+
+## License
+
+	Meanbee_CacheViewer, a Magento extension for inspecting cache contents.
+	
+	Copyright (C) 2013, Meanbee Limited.
+	
+	This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+	
+	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+	
+	You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.

app/code/community/Meanbee/CacheViewer/Block/Adminhtml/Report.php

@@ -1,8 +1,21 @@
 <?php
 class Meanbee_CacheViewer_Block_Adminhtml_Report extends Mage_Adminhtml_Block_Template
 {
+    /**
+     * @var null
+     */
     public $_total_cache_size_bytes = null;
+
+    /**
+     * @var array
+     */
     public $_cache_items = array();
+
+    /**
+     * Regular expressions used to organise tags into groups.
+     *
+     * @var array
+     */
     public $_cache_types = array(
         "Block HTML" => array(
             "/BLOCK_HTML$/"
@@ -18,6 +31,9 @@ class Meanbee_CacheViewer_Block_Adminhtml_Report extends Mage_Adminhtml_Block_Te
         )
     );
 
+    /**
+     *
+     */
     public function _construct()
     {
         parent::_construct();
@@ -27,6 +43,9 @@ public function _construct()
         }
     }
 
+    /**
+     * @return Meanbee_CacheViewer_Model_CacheItemInfo[]
+     */
     public function getCacheItems()
     {
         if (count($this->_cache_items) == 0) {
@@ -100,7 +119,7 @@ public function getAsTimeUnits($raw_seconds)
     }
 
     /**
-     * @return int
+     * @return double
      */
     public function getUsedCacheSizeInMb()
     {
@@ -112,7 +131,7 @@ public function getUsedCacheSizeInMb()
     }
 
     /**
-     * @return int
+     * @return double
      */
     public function getTotalCacheSizeInMb()
     {
@@ -135,6 +154,9 @@ public function getCacheBackend()
         return get_class($this->_getCache()->getBackend());
     }
 
+    /**
+     * @return array
+     */
     public function getCacheStatistics()
     {
         $cache_tag_sizes = array();
@@ -168,4 +190,20 @@ public function getCacheStatistics()
 
         return $cache_tag_sizes;
     }
+
+    /**
+     * @return array
+     */
+    public function getCacheStatisticsGoogleChartsFormat()
+    {
+        $data_structure = array();
+
+        $data_structure[] = array('Cache Type', 'Usage');
+
+        foreach ($this->getCacheStatistics() as $name => $value) {
+            $data_structure[] = array($name, $value);
+        }
+
+        return $data_structure;
+    }
 }

app/code/community/Meanbee/CacheViewer/Block/Toolbar.php

@@ -0,0 +1,34 @@
+<?php
+
+class Meanbee_CacheViewer_Block_Toolbar extends Mage_Core_Block_Template {
+
+    public function _toHtml() {
+
+        if(!Mage::getStoreConfig(Meanbee_CacheViewer_Helper_Data::XML_PATH_CACHEVIEWER_BLOCKS_VIEW_FRONTEND))
+            return;
+
+        return parent::_toHtml();
+    }
+
+    /**
+     * Return the configured default cookie path.
+     *
+     * @return mixed
+     */
+    protected function getCookiePath() {
+        return Mage::getSingleton('core/cookie')->getPath();
+    }
+
+    /**
+     * Return the configured default cookie domain.
+     *
+     * @return string
+     */
+    protected function getCookieDomain() {
+        $domain = Mage::getSingleton('core/cookie')->getDomain();
+        if (!empty($domain[0]) && ($domain[0] !== '.')) {
+            $domain = '.'.$domain;
+        }
+        return $domain;
+    }
+}

app/code/community/Meanbee/CacheViewer/Helper/Data.php

@@ -1,3 +1,11 @@
 <?php
 
-class Meanbee_CacheViewer_Helper_Data extends Mage_Core_Helper_Abstract {}
+class Meanbee_CacheViewer_Helper_Data extends Mage_Core_Helper_Abstract {
+
+    const XML_PATH_CACHEVIEWER_BLOCKS_VIEW_FRONTEND = "cacheviewer/blocks/view_frontend";
+
+    public function isShowCacheStatusOnFrontend() {
+        return Mage::getStoreConfigFlag(self::XML_PATH_CACHEVIEWER_BLOCKS_VIEW_FRONTEND);
+    }
+
+}

app/code/community/Meanbee/CacheViewer/Model/CacheItemInfo.php

@@ -50,6 +50,9 @@ public function getModified()
         return new Zend_Date(parent::getModified());
     }
 
+    /**
+     * @return Zend_Date
+     */
     public function getExpires()
     {
         return new Zend_Date(parent::getExpires());

app/code/community/Meanbee/CacheViewer/Model/DateInterval.php

@@ -6,6 +6,10 @@
  */
 class Meanbee_CacheViewer_Model_DateInterval extends DateInterval {
 
+    /**
+     * @param $seconds
+     * @return Meanbee_CacheViewer_Model_DateInterval
+     */
     public static function createFromSeconds($seconds)
     {
         if ($seconds > 0) {

app/code/community/Meanbee/CacheViewer/Model/Observer.php

@@ -0,0 +1,93 @@
+<?php
+
+class Meanbee_CacheViewer_Model_Observer extends Mage_Core_Model_Abstract {
+
+    const EVENT_BEFORE = 'core_block_abstract_to_html_before';
+    const EVENT_AFTER  = 'core_block_abstract_to_html_after';
+
+    /** @var Meanbee_CacheViewer_Helper_Data */
+    protected $_helper;
+
+    protected $_dispatch_start_time;
+
+    public function _construct() {
+        parent::_construct();
+
+        $this->_helper = Mage::helper('cacheviewer');
+    }
+
+    /**
+     * Add cache block status
+     * @param Varien_Event_Observer $observer
+     * @return void
+     */
+    public function addBlockCacheStatuses(Varien_Event_Observer $observer) {
+        $event = $observer->getEvent();
+        $block = $event->getBlock();
+        $transportObject = $event->getTransport();
+
+        if (!$this->_helper->isShowCacheStatusOnFrontend()) {
+            return;
+        }
+
+        if (in_array(get_class($block), array("Mage_Page_Block_Html", "Mage_Adminhtml_Block_Page"))) {
+            return;
+        }
+
+        // Get cache status
+        $cache = Mage::app()->getCache()->test(strtoupper($block->getCacheKey()));
+        $lastModified = date(DATE_ATOM, time());
+        $blockName = get_class($block);
+        $cacheClass = "";
+
+
+        // If cached, get last modified date and add cached class for css.
+        if($cache) {
+            $lastModified = date(DATE_ATOM, $cache);
+            $cacheClass = " cacheviewer-block-cached";
+        }
+
+        // Get transport object passed through event and wrap out hints around it.
+        $html = $transportObject->getHtml();
+        $html = <<<HTML
+<div class="cacheviewer-container clearer">
+    <div class="cacheviewer-block{$cacheClass}">
+        <div class="cacheviewer-hints">
+            <span class="cacheviewer-lastmodified">{$lastModified}</span>
+            <span class="cacheviewer-name">{$blockName}</span>
+        </div>
+    </div>
+    {$html}
+</div>
+HTML;
+
+        $transportObject->setHtml($html);
+
+        return;
+    }
+
+    /**
+     * Start the timer for tracking dispatch time.
+     * Observe: controller_action_predispatch
+     *
+     * @param Varien_Event_Observer $observer
+     */
+    public function startTimer(Varien_Event_Observer $observer) {
+        $this->_dispatch_start_time = microtime(true);
+    }
+
+    /**
+     * Stop the timer tracking dispatch time and set the elapsed time in a cookie.
+     *
+     * @param Varien_Event_Observer $observer
+     */
+    public function stopTimer(Varien_Event_Observer $observer) {
+        $dispatch_finish_time = microtime(true);
+
+        $elapsed_time = $dispatch_finish_time - $this->_dispatch_start_time;
+
+        if ($this->_helper->isShowCacheStatusOnFrontend()) {
+            Mage::getSingleton('core/cookie')->set("cacheviewer_dispatch_time", sprintf("%.3fs", $elapsed_time), 0, null, null, null, false);
+        }
+    }
+}

app/code/community/Meanbee/CacheViewer/controllers/Adminhtml/Meanbee/CacheviewerController.php

@@ -1,13 +1,24 @@
 <?php
 class Meanbee_CacheViewer_Adminhtml_Meanbee_CacheviewerController extends Mage_Adminhtml_Controller_Action
 {
+    /**
+     * Route: /admin/meanbee_cacheviewer/report/
+     *
+     * Show the cache report.
+     */
     public function reportAction()
     {
         $this->loadLayout();
         $this->getLayout()->getBlock('head')->setTitle("Meanbee CacheViewer");
         $this->renderLayout();
     }
 
+    /**
+     * Route: /admin/meanbee_cacheviewer/view_single/
+     * Params: cache_id
+     *
+     * Fetch the value of a given cache key.
+     */
     public function view_singleAction()
     {
         $cache_id = $this->getRequest()->getParam('cache_id');
@@ -17,6 +28,12 @@ public function view_singleAction()
         $this->getResponse()->setBody(($cache_data) ? Mage::helper('core')->escapeHtml($cache_data) : '(false/empty)');
     }
 
+    /**
+     * Route: /admin/meanbee_cacheviewer/delete_single/
+     * Params: cache_id
+     *
+     * Delete a single cache entry.
+     */
     public function delete_singleAction()
     {
         $cache_id = $this->getRequest()->getParam('cache_id');