<?php
/**
 * Smarty Internal Plugin Compile Print Expression
 * Compiles any tag which will output an expression or variable
 *
 * @package    Smarty
 * @subpackage Compiler
 * @author     Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Print Expression Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Private_Print_Expression extends Smarty_Internal_CompileBase
{
    /**
     * 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 $option_flags = array('nocache', 'nofilter');

    /**
     * Compiles code for generating output from any expression
     *
     * @param array                                 $args      array with attributes from parser
     * @param \Smarty_Internal_TemplateCompilerBase $compiler  compiler object
     * @param array                                 $parameter array with compilation parameter
     *
     * @return string
     * @throws \SmartyException
     */
    public function compile($args, Smarty_Internal_TemplateCompilerBase $compiler, $parameter)
    {
        // check and get attributes
        $_attr = $this->getAttributes($compiler, $args);
        $output = $parameter[ 'value' ];
        // tag modifier
        if (!empty($parameter[ 'modifierlist' ])) {
            $output = $compiler->compileTag('private_modifier', array(),
                                            array('modifierlist' => $parameter[ 'modifierlist' ],
                                                  'value' => $output));
        }
        if (isset($_attr[ 'assign' ])) {
            // assign output to variable
            return "<?php \$_smarty_tpl->assign({$_attr['assign']},{$output});?>";
        } else {
            // display value
            if (!$_attr[ 'nofilter' ]) {
                // default modifier
                if (!empty($compiler->smarty->default_modifiers)) {
                    if (empty($compiler->default_modifier_list)) {
                        $modifierlist = array();
                        foreach ($compiler->smarty->default_modifiers as $key => $single_default_modifier) {
                            preg_match_all('/(\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\'|"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"|:|[^:]+)/',
                                           $single_default_modifier, $mod_array);
                            for ($i = 0, $count = count($mod_array[ 0 ]); $i < $count; $i ++) {
                                if ($mod_array[ 0 ][ $i ] !== ':') {
                                    $modifierlist[ $key ][] = $mod_array[ 0 ][ $i ];
                                }
                            }
                        }
                        $compiler->default_modifier_list = $modifierlist;
                    }
                    $output = $compiler->compileTag('private_modifier', array(),
                                                    array('modifierlist' => $compiler->default_modifier_list,
                                                          'value' => $output));
                }
                // autoescape html
                if ($compiler->template->smarty->escape_html) {
                    $output = "htmlspecialchars({$output}, ENT_QUOTES, '" . addslashes(Smarty::$_CHARSET) . "')";
                }
                // loop over registered filters
                if (!empty($compiler->template->smarty->registered_filters[ Smarty::FILTER_VARIABLE ])) {
                    foreach ($compiler->template->smarty->registered_filters[ Smarty::FILTER_VARIABLE ] as $key =>
                             $function) {
                        if (!is_array($function)) {
                            $output = "{$function}({$output},\$_smarty_tpl)";
                        } elseif (is_object($function[ 0 ])) {
                            $output =
                                "\$_smarty_tpl->smarty->registered_filters[Smarty::FILTER_VARIABLE]['{$key}'][0]->{$function[1]}({$output},\$_smarty_tpl)";
                        } else {
                            $output = "{$function[0]}::{$function[1]}({$output},\$_smarty_tpl)";
                        }
                    }
                }
                // auto loaded filters
                if (isset($compiler->smarty->autoload_filters[ Smarty::FILTER_VARIABLE ])) {
                    foreach ((array) $compiler->template->smarty->autoload_filters[ Smarty::FILTER_VARIABLE ] as $name)
                    {
                        $result = $this->compile_variable_filter($compiler, $name, $output);
                        if ($result !== false) {
                            $output = $result;
                        } else {
                            // not found, throw exception
                            throw new SmartyException("Unable to load variable filter '{$name}'");
                        }
                    }
                }
                foreach ($compiler->variable_filters as $filter) {
                    if (count($filter) === 1 &&
                        ($result = $this->compile_variable_filter($compiler, $filter[ 0 ], $output)) !== false
                    ) {
                        $output = $result;
                    } else {
                        $output = $compiler->compileTag('private_modifier', array(),
                                                        array('modifierlist' => array($filter), 'value' => $output));
                    }
                }
            }
            $output = "<?php echo {$output};?>\n";
        }

        return $output;
    }

    /**
     * @param \Smarty_Internal_TemplateCompilerBase $compiler compiler object
     * @param string                                $name     name of variable filter
     * @param string                                $output   embedded output
     *
     * @return string
     * @throws \SmartyException
     */
    private function compile_variable_filter(Smarty_Internal_TemplateCompilerBase $compiler, $name, $output)
    {
       $function= $compiler->getPlugin($name, 'variablefilter');
       if ($function) {
            return "{$function}({$output},\$_smarty_tpl)";
       } else {
            // not found
            return false;
       }
    }
}
