<?php

/**

 * Smarty Internal Plugin Compile Eval

 * Compiles the {eval} tag.

 *

 * @package    Smarty

 * @subpackage Compiler

 * @author     Uwe Tews

 */

/**

 * Smarty Internal Plugin Compile Eval Class

 *

 * @package    Smarty

 * @subpackage Compiler

 */

class Smarty_Internal_Compile_Eval extends Smarty_Internal_CompileBase {

    /**

     * Attribute definition: Overwrites base class.

     *

     * @var array

     * @see Smarty_Internal_CompileBase

     */

    public $required_attributes = array('var');

    /**

     * Attribute definition: Overwrites base class.

     *

     * @var array

     * @see Smarty_Internal_CompileBase

     */

    public $optional_attributes = array('assign');

    /**

     * Attribute definition: Overwrites base class.

     *

     * @var array

     * @see Smarty_Internal_CompileBase

     */

    public $shorttag_order = array('var', 'assign');

    /**

     * Compiles code for the {eval} tag

     *

     * @param  array $args array with attributes from parser

     * @param  object $compiler compiler object

     *

     * @return string compiled code

     */

    public function compile($args, $compiler) {

        $this->required_attributes = array('var');

        $this->optional_attributes = array('assign');

        // check and get attributes

        $_attr = $this->getAttributes($compiler, $args);

        if (isset($_attr['assign'])) {

            // output will be stored in a smarty variable instead of being displayed

            $_assign = $_attr['assign'];

        }

        // create template object

        $_output = "\$_template = new {$compiler->smarty->template_class}('eval:'." . $_attr['var'] . ", \$_smarty_tpl->smarty, \$_smarty_tpl);";

        //was there an assign attribute?

        if (isset($_assign)) {

            $_output .= "\$_smarty_tpl->assign($_assign,\$_template->fetch());";

        } else {

            $_output .= "echo \$_template->fetch();";

        }

        return "<?php $_output ?>";

    }

}