<?
/*
    class name:     nGenie
    description:    simple template engine
    author:         Sergey Krivoy <hide@address.com>
    version:        0.1
*/
    
    class nGenie {
        var $section;
        var $data;
        var $body_tpl, $iface_tpl;
        var $tpl_path;
        
        function nGenie($tpl_path = "") {
            if ($tpl_path != "") {
                $this->tpl_path = $tpl_path."/";
            } else {
                $this->tpl_path = "";
            }
            $this->data["DOCUMENT_URL"] = "http://".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
        }
        
        function start($body_tpl, $iface_tpl = NULL, $section = NULL) {
            if (is_readable($this->tpl_path.$body_tpl)) {
                $this->body_tpl = join("", file($this->tpl_path.$body_tpl));
            } else {
                echo "body template '$body_tpl' not exists";
            }
            
            if (isset($iface_tpl)) {
                if (is_readable($this->tpl_path.$iface_tpl)) {
                    $this->iface_tpl = join("", file($this->tpl_path.$iface_tpl));
                } else {
                    echo "interface '$iface_tpl' not exists";
                }
            }
            
            if (isset($section)) {
                $this->section = $section;
            }
        }
        
        function set_param($name, $value) {
            $this->data[$name] = $value;
        }
        
        function set_block($name, $block) {
            $this->data[$name][] = $block;
        }
        
        function output() {
            $body = $this->parse_body();
            if (isset($this->iface_tpl)) {
                $iface = $this->parse_iface();
                $body = preg_replace("/\{BODY\}/", $body, $iface);
            }
            //$body = $this->prepare($body);
            echo $body;
        }
        
        function parse_body() {
            $body = $this->body_tpl;
            if (count($this->data)) foreach ($this->data as $key => $value) {
                if (is_array($value)) {
                    $blocks = array();
                    foreach ($value as $block) {
                        if (preg_match("/<!-- BEGIN ".$block->name." -->(.*)<!-- END ".$block->name." -->/s", $body, $matches)) {
                            $blocks[] = $block->parse($matches[1]);
                        }
                    }
                    if (count($blocks)) {
                        $body = preg_replace("/\{(".$key.")\}/", join("", $blocks), $body);
                    }
                } else {
                    $body = preg_replace("/\{(".$key.")\}/", $value, $body);
                }
            }
            $body = preg_replace("/<!-- BEGIN (\w+) -->(.*)<!-- END \\1 -->/s", "", $body);
            return $body;
        }
        
        function parse_iface() {
            $iface = $this->iface_tpl;
            
            if (count($this->data)) foreach ($this->data as $key => $value) {
                if (!is_array($value)) {
                    $iface = preg_replace("/\{(".$key.")\}/", $value, $iface);
                }
            }
            if (count($this->section) and preg_match_all("/<!-- MENUBEGIN (\w+)_(active|passive) -->(.*)<!-- MENUEND \\1_\\2 -->/s", $iface, $matches)) {
                foreach ($matches[1] as $key => $value) if (in_array($value, $this->section) and ($matches[2][$key] == "active")) {
                    $menu_items[] = $matches[3][$key];
                } else if (!in_array($value, $this->section) and $matches[2][$key] == "passive") {
                    $menu_items[] = $matches[3][$key];
                }
                $iface = preg_replace("/\{MENU\}/", join("", $menu_items), $iface);
                $iface = preg_replace("/<!-- MENUBEGIN (\w+)_(active|passive) -->.*<!-- MENUEND (\w+)_(active|passive) -->/s", "", $iface);
            } else {
                echo "empty $this->section or not matched";
            }
            return $iface;
        }
        
        function make($text) {
            $text = preg_replace("/(\r|\n)/s", "", $text);
            $text = preg_replace("/([\s]{2,})/s", " ", $text);
            return $text;
        }
        
        function prepare($text) {
            $text = preg_replace("/(\r|\n)/s", "", $text);
            $text = preg_replace("/([\s]{2,})/s", " ", $text);
            return $text;
        }
        
    }
    
    class block {
        var $name;
        var $data;
        
        function block($name, $data = NULL) {
            $this->name = $name;
            $this->data = $data;
        }
        
        function set_param($name, $value) {
            $this->data[$name] = $value;
        }
        
        function set_block($name, $block) {
            $this->data[$name][] = $block;
        }
        
        function parse($template) {
            if (count($this->data)) foreach ($this->data as $key => $value) {
                if (is_array($value)) {
                    $blocks = array();
                    foreach ($value as $block) {
                        if (preg_match("/<!-- BEGIN ".$block->name." -->(.*)<!-- END ".$block->name." -->/s", $template, $matches)) {
                            $blocks[] = $block->parse($matches[1]);
                        } else {
                            echo $block->name." not found in <pre>".$template."</pre>";
                        }
                    }
                    $template = preg_replace("/\{(".$key.")\}/", join("", $blocks), $template);
                    $template = preg_replace("/<!-- BEGIN (\w+) -->(.*)<!-- END \\1 -->/s", "", $template);
                } else {
                    $template = preg_replace("/\{(".$key.")\}/", $value, $template);
                }
            }
            return $template;
        }
    }
?>