<?php
/**
 * Smarty Internal Plugin Compile Block Plugin
 * Compiles code for the execution of block plugin
 *
 * @package    Smarty
 * @subpackage Compiler
 * @author     Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Block Plugin Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Private_Block_Plugin extends Smarty_Internal_CompileBase
{
    /**
     * Attribute definition: Overwrites base class.
     *
     * @var array
     * @see Smarty_Internal_CompileBase
     */
    public $optional_attributes = array('_any');

    /**
     * nesting level
     *
     * @var int
     */
    public $nesting = 0;

    /**
     * Compiles code for the execution of block plugin
     *
     * @param  array                                $args      array with attributes from parser
     * @param \Smarty_Internal_TemplateCompilerBase $compiler  compiler object
     * @param  array                                $parameter array with compilation parameter
     * @param  string                               $tag       name of block plugin
     * @param  string                               $function  PHP function name
     *
     * @return string compiled code
     * @throws \SmartyCompilerException
     * @throws \SmartyException
     */
    public function compile($args, Smarty_Internal_TemplateCompilerBase $compiler, $parameter, $tag, $function = null)
    {
        if (!isset($tag[ 5 ]) || substr($tag, - 5) !== 'close') {
            // opening tag of block plugin
            // check and get attributes
            $_attr = $this->getAttributes($compiler, $args);
            $this->nesting ++;
            unset($_attr[ 'nocache' ]);
            list($callback, $_paramsArray, $callable) = $this->setup($compiler, $_attr, $tag, $function);
            $_params = 'array(' . implode(',', $_paramsArray) . ')';

            // compile code
            $output = "<?php ";
            if (is_array($callback)) {
                $output .= "\$_block_plugin{$this->nesting} = isset({$callback[0]}) ? {$callback[0]} : null;\n";
                $callback = "\$_block_plugin{$this->nesting}{$callback[1]}";
            }
            if (isset($callable)) {
                $output .= "if (!is_callable({$callable})) {\nthrow new SmartyException('block tag \'{$tag}\' not callable or registered');\n}\n";
            }
            $output .= "\$_smarty_tpl->smarty->_cache['_tag_stack'][] = array('{$tag}', {$_params});\n";
            $output .= "\$_block_repeat=true;\necho {$callback}({$_params}, null, \$_smarty_tpl, \$_block_repeat);\nwhile (\$_block_repeat) {\nob_start();?>";
            $this->openTag($compiler, $tag, array($_params, $compiler->nocache, $callback));
            // maybe nocache because of nocache variables or nocache plugin
            $compiler->nocache = $compiler->nocache | $compiler->tag_nocache;
        } else {
            // must endblock be nocache?
            if ($compiler->nocache) {
                $compiler->tag_nocache = true;
            }
            // closing tag of block plugin, restore nocache
            list($_params, $compiler->nocache, $callback) = $this->closeTag($compiler, substr($tag, 0, - 5));
            // compile code
            if (!isset($parameter[ 'modifier_list' ])) {
                $mod_pre = $mod_post = $mod_content = '';
                $mod_content2 = 'ob_get_clean()';
            } else {
                $mod_content2 = "\$_block_content{$this->nesting}";
                $mod_content = "\$_block_content{$this->nesting} = ob_get_clean();\n";
                $mod_pre = "ob_start();\n";
                $mod_post = 'echo ' . $compiler->compileTag('private_modifier', array(),
                                                            array('modifierlist' => $parameter[ 'modifier_list' ],
                                                                  'value' => 'ob_get_clean()')) . ";\n";
            }
            $output = "<?php {$mod_content}\$_block_repeat=false;\n{$mod_pre}echo {$callback}({$_params}, {$mod_content2}, \$_smarty_tpl, \$_block_repeat);\n{$mod_post}}\n";
            $output .= 'array_pop($_smarty_tpl->smarty->_cache[\'_tag_stack\']);?>';
        }
        return $output;
    }

    /**
     * Setup callback and parameter array
     *
     * @param \Smarty_Internal_TemplateCompilerBase $compiler
     * @param  array                                $_attr attributes
     * @param  string                               $tag
     * @param  string                               $function
     *
     * @return array
     */
    public function setup(Smarty_Internal_TemplateCompilerBase $compiler, $_attr, $tag, $function)
    {
        $_paramsArray = array();
        foreach ($_attr as $_key => $_value) {
            if (is_int($_key)) {
                $_paramsArray[] = "$_key=>$_value";
            } else {
                $_paramsArray[] = "'$_key'=>$_value";
            }
        }
        return array($function, $_paramsArray, null);
    }
}
