silverstripe-framework/View/SSViewer_FromString.php

<?php

namespace SilverStripe\View;

use SilverStripe\Core\Config\Config;

/**
 * Special SSViewer that will process a template passed as a string, rather than a filename.
 */
class SSViewer_FromString extends SSViewer
{

	/**
	 * The global template caching behaviour if no instance override is specified
	 * @config
	 * @var bool
	 */
	private static $cache_template = true;

	/**
	 * The template to use
	 * @var string
	 */
	protected $content;

	/**
	 * Indicates whether templates should be cached
	 *
	 * @var bool
	 */
	protected $cacheTemplate;

	public function __construct($content, TemplateParser $parser = null)
	{
		if ($parser) {
			$this->setParser($parser);
		}

		$this->content = $content;
	}

	public function process($item, $arguments = null, $scope = null)
	{
		$hash = sha1($this->content);
		$cacheFile = TEMP_FOLDER . "/.cache.$hash";

		if (!file_exists($cacheFile) || isset($_GET['flush'])) {
			$content = $this->parseTemplateContent($this->content, "string sha1=$hash");
			$fh = fopen($cacheFile, 'w');
			fwrite($fh, $content);
			fclose($fh);
		}

		$val = $this->includeGeneratedTemplate($cacheFile, $item, $arguments, null, $scope);

		if ($this->cacheTemplate !== null) {
			$cacheTemplate = $this->cacheTemplate;
		} else {
			$cacheTemplate = Config::inst()->get('SilverStripe\\View\\SSViewer_FromString', 'cache_template');
		}

		if (!$cacheTemplate) {
			unlink($cacheFile);
		}

		return $val;
	}

	/**
	 * @param boolean $cacheTemplate
	 */
	public function setCacheTemplate($cacheTemplate)
	{
		$this->cacheTemplate = (bool)$cacheTemplate;
	}

	/**
	 * @return boolean
	 */
	public function getCacheTemplate()
	{
		return $this->cacheTemplate;
	}
}