primo commit

libraries/fof30/View/DataView/Csv.php

@@ -0,0 +1,276 @@
+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\View\DataView;
+
+defined('_JEXEC') || die;
+
+use Exception;
+use FOF30\Container\Container;
+use FOF30\Model\DataModel;
+use FOF30\View\Exception\AccessForbidden;
+use Joomla\CMS\Document\Document;
+
+class Csv extends Html implements DataViewInterface
+{
+	/**
+	 *  Should I produce a CSV header row.
+	 *
+	 * @var  boolean
+	 */
+	protected $csvHeader = true;
+
+	/**
+	 * The filename of the downloaded CSV file.
+	 *
+	 * @var  string
+	 */
+	protected $csvFilename = null;
+
+	/**
+	 * The columns to include in the CSV output. If it's empty it will be ignored.
+	 *
+	 * @var  array
+	 */
+	protected $csvFields = [];
+
+
+	/**
+	 * Public constructor. Instantiates a F0FViewCsv object.
+	 *
+	 *
+	 * @param   Container  $container  The container we belong to
+	 * @param   array      $config     The configuration overrides for the view
+	 */
+	public function __construct(Container $container, array $config = [])
+	{
+		parent::__construct($container, $config);
+
+		if (array_key_exists('csv_header', $config))
+		{
+			$this->csvHeader = $config['csv_header'];
+		}
+		else
+		{
+			$this->csvHeader = $this->input->getBool('csv_header', true);
+		}
+
+		if (array_key_exists('csv_filename', $config))
+		{
+			$this->csvFilename = $config['csv_filename'];
+		}
+		else
+		{
+			$this->csvFilename = $this->input->getString('csv_filename', '');
+		}
+
+		if (empty($this->csvFilename))
+		{
+			$view              = $this->input->getCmd('view', 'cpanel');
+			$view              = $this->container->inflector->pluralize($view);
+			$this->csvFilename = strtolower($view) . '.csv';
+		}
+
+		if (array_key_exists('csv_fields', $config))
+		{
+			$this->csvFields = $config['csv_fields'];
+		}
+	}
+
+	/**
+	 * Overrides the default method to execute and display a template script.
+	 * Instead of loadTemplate is uses loadAnyTemplate.
+	 *
+	 * @param   string  $tpl  The name of the template file to parse
+	 *
+	 * @return  boolean  True on success
+	 *
+	 * @throws  Exception  When the layout file is not found
+	 */
+	public function display($tpl = null)
+	{
+		$eventName = 'onBefore' . ucfirst($this->doTask);
+		$this->triggerEvent($eventName, [$tpl]);
+
+		// Load the model
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		$items       = $model->get();
+		$this->items = $items;
+
+		$platform = $this->container->platform;
+		$document = $platform->getDocument();
+
+		if ($document instanceof Document)
+		{
+			$document->setMimeEncoding('text/csv');
+		}
+
+		$platform->setHeader('Pragma', 'public');
+		$platform->setHeader('Expires', '0');
+
+		/**
+		 * This construct is required to work around bad quality hosts who blacklist files based on broken malware
+		 * scanners. The only way to beat them is... wait for it... write our software using the same obscure constructs
+		 * actual malware is using to evade these broken malware scanners. The irony is not lost on me.
+		 */
+		$xo   = substr("revenge", 0, 3);
+		$xoxo = substr("calibrate", 1, 2);
+		$platform->setHeader('Cache-Control', 'must-' . $xo . $xoxo . 'idate, post-check=0, pre-check=0');
+
+		$platform->setHeader('Cache-Control', 'public', false);
+		$platform->setHeader('Content-Description', 'File Transfer');
+		$platform->setHeader('Content-Disposition', 'attachment; filename="' . $this->csvFilename . '"');
+
+		if (is_null($tpl))
+		{
+			$tpl = 'csv';
+		}
+
+		$hasFailed = false;
+
+		try
+		{
+			$result = $this->loadTemplate($tpl, true);
+
+			if ($result instanceof Exception)
+			{
+				$hasFailed = true;
+			}
+		}
+		catch (Exception $e)
+		{
+			$hasFailed = true;
+		}
+
+		if (!$hasFailed)
+		{
+			echo $result;
+		}
+		else
+		{
+			// Default CSV behaviour in case the template isn't there!
+			if (count($items) === 0)
+			{
+				throw new AccessForbidden;
+			}
+
+			$item = $items->last();
+			$keys = $item->getData();
+			$keys = array_keys($keys);
+
+			reset($items);
+
+			if (!empty($this->csvFields))
+			{
+				$temp = [];
+
+				foreach ($this->csvFields as $f)
+				{
+					$exist = false;
+
+					// If we have a dot and it isn't part of the field name, we are dealing with relations
+					if (!$model->hasField($f) && strpos($f, '.'))
+					{
+						$methods = explode('.', $f);
+						$object  = $item;
+						// Let's see if the relation exists
+						foreach ($methods as $method)
+						{
+							if (isset($object->$method) || property_exists($object, $method))
+							{
+								$exist  = true;
+								$object = $object->$method;
+							}
+							else
+							{
+								$exist = false;
+								break;
+							}
+						}
+					}
+
+					if (in_array($f, $keys))
+					{
+						$temp[] = $f;
+					}
+					elseif ($exist)
+					{
+						$temp[] = $f;
+					}
+				}
+
+				$keys = $temp;
+			}
+
+			if ($this->csvHeader)
+			{
+				$csv = [];
+
+				foreach ($keys as $k)
+				{
+					$k = str_replace('"', '""', $k);
+					$k = str_replace("\r", '\\r', $k);
+					$k = str_replace("\n", '\\n', $k);
+					$k = '"' . $k . '"';
+
+					$csv[] = $k;
+				}
+
+				echo implode(",", $csv) . "\r\n";
+			}
+
+			foreach ($items as $item)
+			{
+				$csv = [];
+
+				foreach ($keys as $k)
+				{
+					// If our key contains a dot and it isn't part of the field name, we are dealing with relations
+					if (!$model->hasField($k) && strpos($k, '.'))
+					{
+						$methods = explode('.', $k);
+						$v       = $item;
+
+						foreach ($methods as $method)
+						{
+							$v = $v->$method;
+						}
+					}
+					else
+					{
+						$v = $item->$k;
+					}
+
+					if (is_array($v))
+					{
+						$v = 'Array';
+					}
+					elseif (is_object($v))
+					{
+						$v = 'Object';
+					}
+
+					$v = str_replace('"', '""', $v);
+					$v = str_replace("\r", '\\r', $v);
+					$v = str_replace("\n", '\\n', $v);
+					$v = '"' . $v . '"';
+
+					$csv[] = $v;
+				}
+
+				echo implode(",", $csv) . "\r\n";
+			}
+		}
+
+		$eventName = 'onAfter' . ucfirst($this->doTask);
+		$this->triggerEvent($eventName, [$tpl]);
+
+		return true;
+	}
+}

libraries/fof30/View/DataView/DataViewInterface.php

@@ -0,0 +1,146 @@
+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\View\DataView;
+
+defined('_JEXEC') || die;
+
+use Exception;
+use FOF30\Container\Container;
+use Joomla\CMS\Pagination\Pagination;
+use stdClass;
+
+interface DataViewInterface
+{
+	/**
+	 * Determines if the current Joomla! version and your current table support AJAX-powered drag and drop reordering.
+	 * If they do, it will set up the drag & drop reordering feature.
+	 *
+	 * @return  boolean|array  False if not supported, otherwise a table with necessary information (saveOrder: should
+	 *                           you enable DnD reordering; orderingColumn: which column has the ordering information).
+	 */
+	public function hasAjaxOrderingSupport();
+
+	/**
+	 * Returns the internal list of useful variables to the benefit of header fields.
+	 *
+	 * @return stdClass
+	 */
+	public function getLists();
+
+	/**
+	 * Returns a reference to the permissions object of this view
+	 *
+	 * @return stdClass
+	 */
+	public function getPerms();
+
+	/**
+	 * Returns a reference to the pagination object of this view
+	 *
+	 * @return Pagination
+	 */
+	public function getPagination();
+
+	/**
+	 * Method to get the view name
+	 *
+	 * The model name by default parsed using the classname, or it can be set
+	 * by passing a $config['name'] in the class constructor
+	 *
+	 * @return  string  The name of the model
+	 *
+	 * @throws  Exception
+	 */
+	public function getName();
+
+	/**
+	 * Returns a reference to the container attached to this View
+	 *
+	 * @return  Container
+	 */
+	public function &getContainer();
+
+	/**
+	 * Escapes a value for output in a view script.
+	 *
+	 * @param   mixed  $var  The output to escape.
+	 *
+	 * @return  string  The escaped value.
+	 */
+	public function escape($var);
+
+	/**
+	 * Returns the task being rendered by the view
+	 *
+	 * @return  string
+	 */
+	public function getTask();
+
+	/**
+	 * Get the layout.
+	 *
+	 * @return  string  The layout name
+	 */
+	public function getLayout();
+
+	/**
+	 * Add a JS script file to the page generated by the CMS.
+	 *
+	 * There are three combinations of defer and async (see http://www.w3schools.com/tags/att_script_defer.asp):
+	 * * $defer false, $async true: The script is executed asynchronously with the rest of the page
+	 *   (the script will be executed while the page continues the parsing)
+	 * * $defer true, $async false: The script is executed when the page has finished parsing.
+	 * * $defer false, $async false. (default) The script is loaded and executed immediately. When it finishes
+	 *   loading the browser continues parsing the rest of the page.
+	 *
+	 * When you are using $defer = true there is no guarantee about the load order of the scripts. Whichever
+	 * script loads first will be executed first. The order they appear on the page is completely irrelevant.
+	 *
+	 * @param   string   $uri      A path definition understood by parsePath, e.g. media://com_example/js/foo.js
+	 * @param   string   $version  (optional) Version string to be added to the URL
+	 * @param   string   $type     MIME type of the script
+	 * @param   boolean  $defer    Adds the defer attribute, see above
+	 * @param   boolean  $async    Adds the async attribute, see above
+	 *
+	 * @return  $this  Self, for chaining
+	 */
+	public function addJavascriptFile($uri, $version = null, $type = 'text/javascript', $defer = false, $async = false);
+
+	/**
+	 * Adds an inline JavaScript script to the page header
+	 *
+	 * @param   string  $script  The script content to add
+	 * @param   string  $type    The MIME type of the script
+	 *
+	 * @return  $this  Self, for chaining
+	 */
+	public function addJavascriptInline($script, $type = 'text/javascript');
+
+	/**
+	 * Add a CSS file to the page generated by the CMS
+	 *
+	 * @param   string  $uri      A path definition understood by parsePath, e.g. media://com_example/css/foo.css
+	 * @param   string  $version  (optional) Version string to be added to the URL
+	 * @param   string  $type     MIME type of the stylesheeet
+	 * @param   string  $media    Media target definition of the style sheet, e.g. "screen"
+	 * @param   array   $attribs  Array of attributes
+	 *
+	 * @return  $this  Self, for chaining
+	 */
+	public function addCssFile($uri, $version = null, $type = 'text/css', $media = null, $attribs = []);
+
+	/**
+	 * Adds an inline stylesheet (inline CSS) to the page header
+	 *
+	 * @param   string  $css   The stylesheet content to add
+	 * @param   string  $type  The MIME type of the script
+	 *
+	 * @return  $this  Self, for chaining
+	 */
+	public function addCssInline($css, $type = 'text/css');
+}

libraries/fof30/View/DataView/Html.php

@@ -0,0 +1,176 @@
+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\View\DataView;
+
+defined('_JEXEC') || die;
+
+use Exception;
+use FOF30\Render\RenderInterface;
+use Joomla\CMS\Application\SiteApplication;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Language\Text;
+
+class Html extends Raw implements DataViewInterface
+{
+	/** @var bool Should I set the page title in the front-end of the site? */
+	public $setFrontendPageTitle = false;
+
+	/** @var string The translation key for the default page title */
+	public $defaultPageTitle = null;
+
+	public function setPageTitle()
+	{
+		if (!$this->container->platform->isFrontend())
+		{
+			return '';
+		}
+
+		/** @var SiteApplication $app */
+		$app      = Factory::getApplication();
+		$document = Factory::getDocument();
+		$menus    = $app->getMenu();
+		$menu     = $menus->getActive();
+		$title    = null;
+
+		// Get the option and view name
+		$option = $this->container->componentName;
+		$view   = $this->getName();
+
+		// Get the default page title translation key
+		$default = empty($this->defaultPageTitle) ? $option . '_TITLE_' . $view : $this->defaultPageTitle;
+
+		$params = $app->getParams($option);
+
+		// Set the default value for page_heading
+		if ($menu)
+		{
+			$params->def('page_heading', $params->get('page_title', $menu->title));
+		}
+		else
+		{
+			$params->def('page_heading', Text::_($default));
+		}
+
+		// Set the document title
+		$title    = $params->get('page_title', '');
+		$sitename = $app->get('sitename');
+
+		if ($title == $sitename)
+		{
+			$title = Text::_($default);
+		}
+
+		if (empty($title))
+		{
+			$title = $sitename;
+		}
+		elseif ($app->get('sitename_pagetitles', 0) == 1)
+		{
+			$title = Text::sprintf('JPAGETITLE', $app->get('sitename'), $title);
+		}
+		elseif ($app->get('sitename_pagetitles', 0) == 2)
+		{
+			$title = Text::sprintf('JPAGETITLE', $title, $app->get('sitename'));
+		}
+
+		$document->setTitle($title);
+
+		// Set meta
+		if ($params->get('menu-meta_description'))
+		{
+			$document->setDescription($params->get('menu-meta_description'));
+		}
+
+		if ($params->get('menu-meta_keywords'))
+		{
+			$document->setMetadata('keywords', $params->get('menu-meta_keywords'));
+		}
+
+		if ($params->get('robots'))
+		{
+			$document->setMetadata('robots', $params->get('robots'));
+		}
+
+		return $title;
+	}
+
+	/**
+	 * Runs before rendering the view template, echoing HTML to put before the
+	 * view template's generated HTML
+	 *
+	 * @return  void
+	 *
+	 * @throws Exception
+	 */
+	protected function preRender()
+	{
+		$view = $this->getName();
+		$task = $this->task;
+
+		// Don't load the toolbar on CLI
+		$platform = $this->container->platform;
+
+		if (!$platform->isCli())
+		{
+			$toolbar        = $this->container->toolbar;
+			$toolbar->perms = $this->permissions;
+			$toolbar->renderToolbar($view, $task);
+		}
+
+		if ($platform->isFrontend() && $this->setFrontendPageTitle)
+		{
+			$this->setPageTitle();
+		}
+
+		$renderer = $this->container->renderer;
+		$renderer->preRender($view, $task);
+	}
+
+	/**
+	 * Runs after rendering the view template, echoing HTML to put after the
+	 * view template's generated HTML
+	 *
+	 * @return  void
+	 *
+	 * @throws Exception
+	 */
+	protected function postRender()
+	{
+		$view = $this->getName();
+		$task = $this->task;
+
+		$renderer = $this->container->renderer;
+
+		if ($renderer instanceof RenderInterface)
+		{
+			$renderer->postRender($view, $task);
+		}
+	}
+
+	/**
+	 * Executes before rendering the page for the Add task.
+	 */
+	protected function onBeforeAdd()
+	{
+		// Hide main menu
+		Factory::getApplication()->input->set('hidemainmenu', true);
+
+		parent::onBeforeAdd();
+	}
+
+	/**
+	 * Executes before rendering the page for the Edit task.
+	 */
+	protected function onBeforeEdit()
+	{
+		// Hide main menu
+		Factory::getApplication()->input->set('hidemainmenu', true);
+
+		parent::onBeforeEdit();
+	}
+}

libraries/fof30/View/DataView/Json.php

@@ -0,0 +1,271 @@
+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\View\DataView;
+
+defined('_JEXEC') || die;
+
+use Exception;
+use FOF30\Model\DataModel;
+use Joomla\CMS\Document\Document;
+use Joomla\CMS\Document\JsonDocument as JDocumentJSON;
+
+class Json extends Raw implements DataViewInterface
+{
+	/**
+	 * Set to true if your onBefore* methods have already populated the item, items, limitstart etc properties used to
+	 * render a JSON document.
+	 *
+	 * @var bool
+	 */
+	public $alreadyLoaded = false;
+
+	/**
+	 * Record listing offset (how many records to skip before starting showing some)
+	 *
+	 * @var   int
+	 */
+	protected $limitStart = 0;
+
+	/**
+	 * Record listing limit (how many records to show)
+	 *
+	 * @var   int
+	 */
+	protected $limit = 10;
+
+	/**
+	 * Total number of records in the result set
+	 *
+	 * @var   int
+	 */
+	protected $total = 0;
+
+	/**
+	 * The record being displayed
+	 *
+	 * @var   DataModel
+	 */
+	protected $item = null;
+
+	/**
+	 * Overrides the default method to execute and display a template script.
+	 * Instead of loadTemplate is uses loadAnyTemplate.
+	 *
+	 * @param   string  $tpl  The name of the template file to parse
+	 *
+	 * @return  boolean  True on success
+	 *
+	 * @throws  Exception  When the layout file is not found
+	 */
+	public function display($tpl = null)
+	{
+		$eventName = 'onBefore' . ucfirst($this->doTask);
+		$this->triggerEvent($eventName, [$tpl]);
+
+		$eventName = 'onAfter' . ucfirst($this->doTask);
+		$this->triggerEvent($eventName, [$tpl]);
+
+		return true;
+	}
+
+	/**
+	 * The event which runs when we are displaying the record list JSON view
+	 *
+	 * @param   string  $tpl  The sub-template to use
+	 */
+	public function onBeforeBrowse($tpl = null)
+	{
+		// Load the model
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		$result = '';
+
+		if (!$this->alreadyLoaded)
+		{
+			$this->limitStart = $model->getState('limitstart', 0);
+			$this->limit      = $model->getState('limit', 0);
+			$this->items      = $model->get(true, $this->limitStart, $this->limit);
+			$this->total      = $model->count();
+		}
+
+		$document = $this->container->platform->getDocument();
+
+		/** @var JDocumentJSON $document */
+		if ($document instanceof Document)
+		{
+			$document->setMimeEncoding('application/json');
+		}
+
+		if (is_null($tpl))
+		{
+			$tpl = 'json';
+		}
+
+		$hasFailed = false;
+
+		try
+		{
+			$result = $this->loadTemplate($tpl, true);
+
+			if ($result instanceof Exception)
+			{
+				$hasFailed = true;
+			}
+		}
+		catch (Exception $e)
+		{
+			$hasFailed = true;
+		}
+
+		if ($hasFailed)
+		{
+			// Default JSON behaviour in case the template isn't there!
+			$result = [];
+
+			foreach ($this->items as $item)
+			{
+				if (is_object($item) && method_exists($item, 'toArray'))
+				{
+					$result[] = $item->toArray();
+				}
+				else
+				{
+					$result[] = $item;
+				}
+			}
+
+			$json = json_encode($result, JSON_PRETTY_PRINT);
+
+			// JSONP support
+			$callback = $this->input->get('callback', null, 'raw');
+
+			if (!empty($callback))
+			{
+				echo $callback . '(' . $json . ')';
+			}
+			else
+			{
+				$defaultName = $this->input->get('view', 'main', 'cmd');
+				$filename    = $this->input->get('basename', $defaultName, 'cmd');
+
+				$document->setName($filename);
+				echo $json;
+			}
+		}
+		else
+		{
+			echo $result;
+		}
+	}
+
+	/**
+	 * The event which runs when we are displaying a single item JSON view
+	 *
+	 * @param   string  $tpl  The view sub-template to use
+	 */
+	protected function onBeforeRead($tpl = null)
+	{
+		self::renderSingleItem($tpl);
+	}
+
+	/**
+	 * The event which runs when we are displaying a single item JSON view
+	 *
+	 * @param   string  $tpl  The view sub-template to use
+	 */
+	protected function onAfterSave($tpl = null)
+	{
+		self::renderSingleItem($tpl);
+	}
+
+	/**
+	 * Renders a single item JSON view
+	 *
+	 * @param   string  $tpl  The view sub-template to use
+	 */
+	protected function renderSingleItem($tpl)
+	{
+		// Load the model
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		$result = '';
+
+		if (!$this->alreadyLoaded)
+		{
+			$this->item = $model->find();
+		}
+
+
+		$document = $this->container->platform->getDocument();
+
+		/** @var JDocumentJSON $document */
+		if ($document instanceof Document)
+		{
+			$document->setMimeEncoding('application/json');
+		}
+
+		if (is_null($tpl))
+		{
+			$tpl = 'json';
+		}
+
+		$hasFailed = false;
+
+		try
+		{
+			$result = $this->loadTemplate($tpl, true);
+
+			if ($result instanceof Exception)
+			{
+				$hasFailed = true;
+			}
+		}
+		catch (Exception $e)
+		{
+			$hasFailed = true;
+		}
+
+		if ($hasFailed)
+		{
+			// Default JSON behaviour in case the template isn't there!
+
+			if (is_object($this->item) && method_exists($this->item, 'toArray'))
+			{
+				$data = $this->item->toArray();
+			}
+			else
+			{
+				$data = $this->item;
+			}
+
+			$json = json_encode($data, JSON_PRETTY_PRINT);
+
+			// JSONP support
+			$callback = $this->input->get('callback', null);
+
+			if (!empty($callback))
+			{
+				echo $callback . '(' . $json . ')';
+			}
+			else
+			{
+				$defaultName = $this->input->get('view', 'main', 'cmd');
+				$filename    = $this->input->get('basename', $defaultName, 'cmd');
+				$document->setName($filename);
+
+				echo $json;
+			}
+		}
+		else
+		{
+			echo $result;
+		}
+	}
+}

libraries/fof30/View/DataView/Raw.php

@@ -0,0 +1,379 @@
+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\View\DataView;
+
+defined('_JEXEC') || die;
+
+use Exception;
+use FOF30\Container\Container;
+use FOF30\Model\DataModel;
+use FOF30\Model\DataModel\Collection;
+use FOF30\View\View;
+use Joomla\CMS\Application\SiteApplication;
+use Joomla\CMS\Factory;
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Pagination\Pagination;
+use Joomla\Registry\Registry;
+use stdClass;
+
+/**
+ * View for a raw data-driven view
+ */
+class Raw extends View implements DataViewInterface
+{
+	/** @var   stdClass  Data lists */
+	protected $lists = null;
+
+	/** @var Pagination The pagination object */
+	protected $pagination = null;
+
+	/** @var Registry|Registry Page parameters object, for front-end views */
+	protected $pageParams = null;
+
+	/** @var Collection The records loaded (browse views) */
+	protected $items = null;
+
+	/** @var DataModel The record loaded (read, edit, add views) */
+	protected $item = null;
+
+	/** @var int The total number of items in the model (more than those loaded) */
+	protected $itemCount = 0;
+
+	/** @var stdClass ACL permissions map */
+	protected $permissions = null;
+
+	/** @var array Additional permissions to fetch on object creation, see getPermissions() */
+	protected $additionalPermissions = [];
+
+	/**
+	 * Overrides the constructor to apply Joomla! ACL permissions
+	 *
+	 * @param   Container  $container  The container we belong to
+	 * @param   array      $config     The configuration overrides for the view
+	 */
+	public function __construct(Container $container, array $config = [])
+	{
+		parent::__construct($container, $config);
+
+		$this->permissions = $this->getPermissions(null, $this->additionalPermissions);
+	}
+
+	/**
+	 * Determines if the current Joomla! version and your current table support AJAX-powered drag and drop reordering.
+	 * If they do, it will set up the drag & drop reordering feature.
+	 *
+	 * @return  boolean|array  False if not supported, otherwise a table with necessary information (saveOrder: should
+	 *                           you enable DnD reordering; orderingColumn: which column has the ordering information).
+	 */
+	public function hasAjaxOrderingSupport()
+	{
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		if (!$model->hasField('ordering'))
+		{
+			return false;
+		}
+
+		$listOrder       = $this->escape($model->getState('filter_order', null, 'cmd'));
+		$listDirn        = $this->escape($model->getState('filter_order_Dir', null, 'cmd'));
+		$saveOrder       = $listOrder == $model->getFieldAlias('ordering');
+		$saveOrderingUrl = '';
+
+		if ($saveOrder)
+		{
+			$saveOrderingUrl = 'index.php?option=' . $this->container->componentName . '&view=' . $this->getName() . '&task=saveorder&format=json';
+			$helper          = version_compare(JVERSION, '3.999.999', 'le') ? 'sortablelist.sortable' : 'draggablelist.draggable';
+
+			HtmlHelper::_($helper, 'itemsList', 'adminForm', strtolower($listDirn), $saveOrderingUrl);
+		}
+
+		return [
+			'saveOrder'      => $saveOrder,
+			'saveOrderURL'   => $saveOrderingUrl . '&' . $this->container->platform->getToken() . '=1',
+			'orderingColumn' => $model->getFieldAlias('ordering'),
+		];
+	}
+
+	/**
+	 * Returns the internal list of useful variables to the benefit of header fields.
+	 *
+	 * @return stdClass
+	 */
+	public function getLists()
+	{
+		return $this->lists;
+	}
+
+	/**
+	 * Returns a reference to the permissions object of this view
+	 *
+	 * @return stdClass
+	 */
+	public function getPerms()
+	{
+		return $this->permissions;
+	}
+
+	/**
+	 * Returns a reference to the pagination object of this view
+	 *
+	 * @return Pagination
+	 */
+	public function getPagination()
+	{
+		return $this->pagination;
+	}
+
+	/**
+	 * Get the items collection for browse views
+	 *
+	 * @return Collection
+	 */
+	public function getItems()
+	{
+		return $this->items;
+	}
+
+	/**
+	 * Get the item for read, edit, add views
+	 *
+	 * @return DataModel
+	 */
+	public function getItem()
+	{
+		return $this->item;
+	}
+
+	/**
+	 * Get the items count for browse views
+	 *
+	 * @return int
+	 */
+	public function getItemCount()
+	{
+		return $this->itemCount;
+	}
+
+	/**
+	 * Get the Joomla! page parameters
+	 *
+	 * @return Registry|Registry
+	 */
+	public function getPageParams()
+	{
+		return $this->pageParams;
+	}
+
+	/**
+	 * Returns a permissions object.
+	 *
+	 * The additionalPermissions array is a hashed array of local key => Joomla! ACL key value pairs. Local key is the
+	 * name of the permission in the permissions object, whereas Joomla! ACL key is the name of the ACL permission
+	 * known to Joomla! e.g. "core.manage", "foobar.something" and so on.
+	 *
+	 * Note: on CLI applications all permissions are set to TRUE. There is no ACL check there.
+	 *
+	 * @param   null|string  $component              The name of the component. Leave empty for automatic detection.
+	 * @param   array        $additionalPermissions  Any additional permissions you want to add to the object.
+	 *
+	 * @return  object
+	 */
+	protected function getPermissions($component = null, array $additionalPermissions = [])
+	{
+		// Make sure we have a component
+		if (empty($component))
+		{
+			$component = $this->container->componentName;
+		}
+
+		// Initialise with all true
+		$permissions = [
+			'create'    => true,
+			'edit'      => true,
+			'editown'   => true,
+			'editstate' => true,
+			'delete'    => true,
+		];
+
+		if (!empty($additionalPermissions))
+		{
+			foreach ($additionalPermissions as $localKey => $joomlaPermission)
+			{
+				$permissions[$localKey] = true;
+			}
+		}
+
+		$platform = $this->container->platform;
+
+		// If this is a CLI application we don't make any ACL checks
+		if ($platform->isCli())
+		{
+			return (object) $permissions;
+		}
+
+		// Get the core permissions
+		$permissions = [
+			'create'    => $platform->authorise('core.create', $component),
+			'edit'      => $platform->authorise('core.edit', $component),
+			'editown'   => $platform->authorise('core.edit.own', $component),
+			'editstate' => $platform->authorise('core.edit.state', $component),
+			'delete'    => $platform->authorise('core.delete', $component),
+		];
+
+		if (!empty($additionalPermissions))
+		{
+			foreach ($additionalPermissions as $localKey => $joomlaPermission)
+			{
+				$permissions[$localKey] = $platform->authorise($joomlaPermission, $component);
+			}
+		}
+
+		return (object) $permissions;
+	}
+
+	/**
+	 * Executes before rendering the page for the Browse task.
+	 */
+	protected function onBeforeBrowse()
+	{
+		// Create the lists object
+		$this->lists = new stdClass();
+
+		// Load the model
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		// We want to persist the state in the session
+		$model->savestate(1);
+
+		// Display limits
+		$defaultLimit = 20;
+
+		if (!$this->container->platform->isCli() && class_exists('JFactory'))
+		{
+			$app = Factory::getApplication();
+
+			if (method_exists($app, 'get'))
+			{
+				$defaultLimit = $app->get('list_limit');
+			}
+			else
+			{
+				$defaultLimit = 20;
+			}
+		}
+
+		$this->lists->limitStart = $model->getState('limitstart', 0, 'int');
+		$this->lists->limit      = $model->getState('limit', $defaultLimit, 'int');
+
+		$model->limitstart = $this->lists->limitStart;
+		$model->limit      = $this->lists->limit;
+
+		// Assign items to the view
+		$this->items     = $model->get(false);
+		$this->itemCount = $model->count();
+
+		// Ordering information
+		$this->lists->order     = $model->getState('filter_order', $model->getIdFieldName(), 'cmd');
+		$this->lists->order_Dir = $model->getState('filter_order_Dir', null, 'cmd');
+
+		if ($this->lists->order_Dir)
+		{
+			$this->lists->order_Dir = strtolower($this->lists->order_Dir);
+		}
+
+		// Pagination
+		$this->pagination = new Pagination($this->itemCount, $this->lists->limitStart, $this->lists->limit);
+
+		// Pass page params on frontend only
+		if ($this->container->platform->isFrontend())
+		{
+			/** @var SiteApplication $app */
+			$app              = Factory::getApplication();
+			$params           = $app->getParams();
+			$this->pageParams = $params;
+		}
+	}
+
+	/**
+	 * Executes before rendering the page for the add task.
+	 */
+	protected function onBeforeAdd()
+	{
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		/**
+		 * The model is pushed into the View by the Controller. As you can see in DataController::add() it is possible
+		 * to push both default values (defaultsForAdd) as well as data from the state (e.g. when saving a new record
+		 * failed for some reason and the user needs to edit it). That's why we populate defaultFields from $model. We
+		 * still do a full reset on a clone of the Model to get a clean object and merge default values (instead of null
+		 * values) with the data pushed by the controller.
+		 */
+		$defaultFields = $model->getData();
+		$this->item    = $model->getClone()->reset(true, true);
+
+		foreach ($defaultFields as $k => $v)
+		{
+			try
+			{
+				$this->item->setFieldValue($k, $v);
+			}
+			catch (Exception $e)
+			{
+				// Suppress errors in field assignments at this stage
+			}
+		}
+	}
+
+	/**
+	 * Executes before rendering the page for the Edit task.
+	 */
+	protected function onBeforeEdit()
+	{
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		// It seems that I can't edit records, maybe I can edit only this one due asset tracking?
+		if (!$this->permissions->edit || !$this->permissions->editown)
+		{
+			if ($model)
+			{
+				// Ok, record is tracked, let's see if I can this record
+				if ($model->isAssetsTracked())
+				{
+					$platform = $this->container->platform;
+
+					if (!$this->permissions->edit)
+					{
+						$this->permissions->edit = $platform->authorise('core.edit', $model->getAssetName());
+					}
+
+					if (!$this->permissions->editown)
+					{
+						$this->permissions->editown = $platform->authorise('core.edit.own', $model->getAssetName());
+					}
+				}
+			}
+		}
+
+		$this->item = $model->findOrFail();
+	}
+
+	/**
+	 * Executes before rendering the page for the Read task.
+	 */
+	protected function onBeforeRead()
+	{
+		/** @var DataModel $model */
+		$model = $this->getModel();
+
+		$this->item = $model->findOrFail();
+	}
+}