<?php

class _BlockTag extends kBase {

	/**
	 * Enter description here...
	 *
	 * @var NParser
	 */
	var $Parser = null;
	var $Tag = null;

	function _BlockTag($tag)
	{
		parent::kBase();
		$this->Tag = $tag;
	}

	function Open($tag)
	{

	}

	/**
	 * All tags inside block tag are passed through to this method
	 * Any returned result is appened to current level's buffer
	 * This can be used to implement special handling of such tags as <inp2:m_else/>
	 *
	 * @param unknown_type $tag
	 * @return unknown
	 */
	function PassThrough(&$tag)
	{
		return '';
	}

	function Close($tag)
	{
		return $this->Parser->Buffers[$this->Parser->Level];
	}

	function AppendCode(&$o, $code)
	{
		$o .= '<?'."php\n" . ( is_array($code) ? implode("\n", $code)."\n" : $code) .'?>';
	}
}

class _Tag_Comment extends _BlockTag {
	function PassThrough(&$tag)
	{
		$tag['processed'] = true;
	}

	function Close($tag)
	{
		return '';
	}
}

class _Tag_DefineElement extends _BlockTag {

	function Open($tag)
	{
		$o = '';

		$f_name = $tag['NP']['name'].'_'.abs(crc32($tag['file'])).'_'.$tag['line'];

		$code[] = "\$_parser->Elements['{$tag['NP']['name']}'] = '$f_name';";

		// function_exists is required here, because a template may be included more than once
		// leading to Cannot redeclare error
		$code[] = "if (!function_exists('{$f_name}')) {";
		$code[] = "function $f_name(&\$_parser, \$params) {";
		$code[] = "global \$application;";

		$defaults = $this->Parser->CompileParamsArray($tag['NP']);

		$code[] = "\$params = array_merge($defaults, \$params);";
		$code[] = "if (!isset(\$params['PrefixSpecial']) && isset(\$params['prefix'])) {\$params['PrefixSpecial'] = \$params['prefix'];};";
		$code[] = "extract(\$params);";
		$code[] = "\$_parser->SetParams(\$params);";
		$code[] = 'ob_start();';
		$this->AppendCode($o, $code);
		return $o;
	}

	function Close($tag)
	{
		$o = $this->Parser->Buffers[$this->Parser->Level];
		$code[] = '$_output = ob_get_contents();';
		$code[] = 'ob_end_clean();';
		$code[] = 'return $_output;';
		$code[] = '}}';
		$this->AppendCode($o, $code);
		return $o;
	}
}

class _Tag_Capture extends _Tag_DefineElement {
	function Open($tag)
	{
		$tag['NP']['name'] = '__capture_'.$tag['NP']['to_var'];

		$o = '';
		$this->AppendCode($o, "\$_parser->Captures['{$tag['NP']['to_var']}'] = 1;");
		$o .= parent::Open($tag);
		return $o;
	}
}

class _Tag_RenderElement extends _Tag_DefineElement {
	var $Single = true;
	var $OriginalTag;

	function Open($tag)
	{
		$o = '';
		if ($tag['is_closing']) {
			if (isset($tag['NP']['design'])) {
				$this->RenderDesignCode($o, $tag['NP']);
				return $o;
			}
			$to_pass = $this->Parser->CompileParamsArray($tag['NP']);
			$this->AppendCode($o, "echo (\$_parser->ParseBlock($to_pass));");
			return $o;
		}
		$this->Single = false;
		$this->OriginalTag = $tag;
		$tag['NP']['name'] = '__lambda';
		return parent::Open($tag);
	}

	function RenderDesignCode(&$o, $params)
	{
		$to_pass = $this->Parser->CompileParamsArray($params);
		$code[] = "echo (\$_parser->ParseBlock(array_merge($to_pass, array('name'=>'{$params['design']}','content'=>\$_parser->ParseBlock($to_pass)))));";
		$this->AppendCode($o, $code);
	}

	function Close($tag)
	{
		if ($this->Single) {
			return $this->Parser->Buffers[$this->Parser->Level];
		}
		$o = parent::Close($tag);
		$this->OriginalTag['NP']['name'] = '__lambda';
		$this->RenderDesignCode($o, $this->OriginalTag['NP']);
		return $o;
	}
}

class _Tag_Param extends _BlockTag {
	function Open($tag)
	{
		$o = '';
		$code[] = "if (isset(\$_parser->Captures['{$tag['NP']['name']}'])) {";
		$code[] = "\${$tag['NP']['name']} = \$_parser->ParseBlock(array('name' => '__capture_{$tag['NP']['name']}'));";
		$code[] = "\$params['{$tag['NP']['name']}'] = \${$tag['NP']['name']};";
		$code[] = "}";
		$code[] = "echo (\${$tag['NP']['name']});";
		$this->AppendCode($o, $code);
		return $o;
	}
}

class _Tag_Include extends _BlockTag {
	function Open($tag)
	{
		$o = '';
		$to_pass = $this->Parser->CompileParamsArray($tag['NP']);
		$this->AppendCode($o, "echo (\$_parser->IncludeTemplate($to_pass))");
		return $o;
	}
}

class _Tag_If extends _BlockTag {
	function Open($tag)
	{
		$o = '';
		$to_pass = $this->Parser->CompileParamsArray($tag['NP']);

		if (!isset($tag['NP']['check'])) {
			$this->Application->handleError(E_USER_ERROR, 'Tag '.$this->Parser->TagInfo($tag, true).' called <b> without required check </b> attribute', $tag['file'], $tag['line']);
		}

		$code[] = "\$_splited = \$_parser->SplitTag(array('tag'=>\"{$tag['NP']['check']}\", 'file'=>'{$tag['file']}', 'line'=>{$tag['line']}));";
		$code[] = 'if ($_splited[\'prefix\'] == \'__auto__\') {$_splited[\'prefix\'] = $PrefixSpecial;}';
		$code[] = '$_p_ =& $_parser->GetProcessor($_splited[\'prefix\']);';
		if (isset($tag['NP']['inverse'])) {
			$code[] = "if (!\$_p_->ProcessParsedTag(\$_splited['name'], $to_pass, \$_splited['prefix'], '{$tag['file']}', {$tag['line']})) {";
		}
		else {
			$code[] = "if (\$_p_->ProcessParsedTag(\$_splited['name'], $to_pass, \$_splited['prefix'], '{$tag['file']}', {$tag['line']})) {";
		}
		$this->AppendCode($o, $code);
		return $o;
	}

	function PassThrough(&$tag)
	{
		$o = '';
		if ($tag['name'] == 'else') {
			$this->AppendCode($o, '} else {');
			$tag['processed'] = true;
		}
		return $o;
	}

	function Close($tag)
	{
		$o = $this->Parser->Buffers[$this->Parser->Level];
		$this->AppendCode($o, "}\n");
		return $o;
	}
}

class _Tag_DefaultParam extends _BlockTag {
	function Open($tag)
	{
		$o = '';
		foreach ($tag['NP'] as $key => $val)	{
			$code[] = 'if (!isset($'.$key.')) $params[\''.$key.'\'] = \''.$val.'\';';
			$code[] = '$'.$key.' = isset($'.$key.') ? $'.$key.' : \''.$val.'\';';
		}
		$this->AppendCode($o, $code);
		return $o;
	}
}