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libraries/fof30/Model/DataModel/Behaviour/Own.php

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+<?php
+/**
+ * @package   FOF
+ * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 2, or later
+ */
+
+namespace FOF30\Model\DataModel\Behaviour;
+
+defined('_JEXEC') || die;
+
+use FOF30\Event\Observer;
+use FOF30\Model\DataModel;
+use JDatabaseQuery;
+
+/**
+ * FOF model behavior class to filter access to items owned by the currently logged in user only
+ *
+ * @since    2.1
+ */
+class Own extends Observer
+{
+	/**
+	 * This event runs after we have built the query used to fetch a record
+	 * list in a model. It is used to apply automatic query filters.
+	 *
+	 * @param   DataModel      &$model  The model which calls this event
+	 * @param   JDatabaseQuery &$query  The query we are manipulating
+	 *
+	 * @return  void
+	 */
+	public function onAfterBuildQuery(&$model, &$query)
+	{
+		// Make sure the field actually exists
+		if (!$model->hasField('created_by'))
+		{
+			return;
+		}
+
+		// Get the current user's id
+		$user_id = $model->getContainer()->platform->getUser()->id;
+
+		// And filter the query output by the user id
+		$db = $model->getContainer()->platform->getDbo();
+
+		$query->where($db->qn($model->getFieldAlias('created_by')) . ' = ' . $db->q($user_id));
+	}
+
+	/**
+	 * The event runs after DataModel has retrieved a single item from the database. It is used to apply automatic
+	 * filters.
+	 *
+	 * @param   DataModel &$model  The model which was called
+	 * @param   Array     &$keys   The keys used to locate the record which was loaded
+	 *
+	 * @return  void
+	 */
+	public function onAfterLoad(&$model, &$keys)
+	{
+		// Make sure we have a DataModel
+		if (!($model instanceof DataModel))
+		{
+			return;
+		}
+
+		// Make sure the field actually exists
+		if (!$model->hasField('created_by'))
+		{
+			return;
+		}
+
+		// Get the user
+		$user_id    = $model->getContainer()->platform->getUser()->id;
+		$recordUser = $model->getFieldValue('created_by', null);
+
+		// Filter by authorised access levels
+		if ($recordUser != $user_id)
+		{
+			$model->reset(true);
+		}
+	}
+}