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libraries/fof30/View/DataView/Json.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\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;
+		}
+	}
+}