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<?php

/*
 * This file is part of Mustache.php.
 *
 * (c) 2010-2017 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Mustache Lambda Helper.
 *
 * Passed as the second argument to section lambdas (higher order sections),
 * giving them access to a `render` method for rendering a string with the
 * current context.
 */
class Mustache_LambdaHelper
{
    private $mustache;
    private $context;
    private $delims;

/**
     * Mustache Lambda Helper constructor.
     *
     * @param Mustache_Engine  $mustache Mustache engine instance
     * @param Mustache_Context $context  Rendering context
     * @param string           $delims   Optional custom delimiters, in the format `{{= <% %> =}}`. (default: null)
     */
    public function __construct(Mustache_Engine $mustache, Mustache_Context $context, $delims = null)
    {
        $this->mustache = $mustache;
        $this->context  = $context;
        $this->delims   = $delims;
    }

/**
     * Render a string as a Mustache template with the current rendering context.
     *
     * @param string $string
     *
     * @return string Rendered template
     */
    public function render($string)
    {
        return $this->mustache
            ->loadLambda((string) $string, $this->delims)
            ->renderInternal($this->context);
    }

/**
     * Render a string as a Mustache template with the current rendering context.
     *
     * @param string $string
     *
     * @return string Rendered template
     */
    public function __invoke($string)
    {
        return $this->render($string);
    }

/**
     * Get a Lambda Helper with custom delimiters.
     *
     * @param string $delims Custom delimiters, in the format `{{= <% %> =}}`
     *
     * @return Mustache_LambdaHelper
     */
    public function withDelimiters($delims)
    {
        return new self($this->mustache, $this->context, $delims);
    }
}