Reworked template processor. support for "if" "for" and "inc" blocks, also nested

diff --git a/include/template_processor.php b/include/template_processor.php
index f6d0264df9abc8d0bf0b35de53791a3d3d3efc8a..d1ff3998f0c84f0cf70a37a2d564a559da68e8f7 100644 (file)
--- a/include/template_processor.php
+++ b/include/template_processor.php
@@ -1,11 +1,12 @@
 <?php
-       
 
        class Template {
-               var $s;
                var $r;
                var $search;
                var $replace;
+               var $stack = array();
+               var $nodes = array();
+               var $done = false;
                
                private function _build_replace($r, $prefix){
        
@@ -20,31 +21,117 @@
                        }
                } 
                
-               private function _replcb_if($m){
-                       //echo "<pre>"; var_dump($m);
-                       $keys = explode(".",$m[1]);
+               private function _push_stack(){
+                       $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
+               }
+               private function _pop_stack(){
+                       list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
+               }
+               
+               private function _get_var($name){
+                       $keys = array_map('trim',explode(".",$name));                   
                        $val = $this->r;
                        foreach($keys as $k) {
                                $val = $val[$k];
                        }
+                       return $val;
+               }
+               
+               /**
+                * IF node
+                * 
+                * {{ if <$var> }}...{{ endif }}
+                */
+               private function _replcb_if($args){
+                       $val = $this->_get_var($args[2]);
+                       return ($val?$args[3]:"");
+               }
+               
+               /**
+                * FOR node
+                * 
+                * {{ for <$var> as $name }}...{{ endfor }}
+                * {{ for <$var> as $key=>$name }}...{{ endfor }}
+                */
+               private function _replcb_for($args){
+                       $m = array_map('trim', explode(" as ", $args[2]));
+                       list($keyname, $varname) = explode("=>",$m[1]);
+                       if (is_null($varname)) { $varname=$keyname; $keyname=""; }
+                       if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
+                       $vals = $this->r[$m[0]];
+                       $ret="";
+                       if (!is_array($vals)) return $ret; 
+                       foreach ($vals as $k=>$v){
+                               $this->_push_stack();
+                               $r = $this->r;
+                               $r[$varname] = $v;
+                               if ($keyname!='') $r[$keyname] = $k;
+                               $ret .=  $this->replace($args[3], $r);
+                               $this->_pop_stack();
+                       }
+                       return $ret;
+               }
+
+               /**
+                * INC node
+                * 
+                * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
+                */
+               private function _replcb_inc($args){
+                       list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
+                       $this->_push_stack();
+                       $r = $this->r;
+                       if (!is_null($newctx)) {
+                               list($a,$b) = array_map('trim', explode("=",$newctx));
+                               $r[$a] = $this->_get_var($b); 
+                       }
+                       $this->nodes = Array();
+                       $tpl = load_view_file($tplfile);
+                       $ret = $this->replace($tpl, $r);
+                       $this->_pop_stack();
+                       return $ret;
                        
-                       //echo $val;
-                       return ($val?$m[2]:"");
+               }
+
+               private function _replcb_node($m) {
+                       $node = $this->nodes[$m[1]];
+                       if (method_exists($this, "_replcb_".$node[1])){
+                               return call_user_func(array($this, "_replcb_".$node[1]),  $node);
+                       } else {
+                               return "";
+                       }
+               }
+                                               
+               private function _replcb($m){
+                       $this->done = false;    
+                       $this->nodes[] = (array) $m;
+                       return "||". (count($this->nodes)-1) ."||";
+               }
+               
+               private function _build_nodes($s){
+                       $this->done = false;
+                       while (!$this->done){
+                               $this->done=true;
+                               $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*){{ *end\1 *}}|', array($this, "_replcb"), $s);
+                       }
+                       krsort($this->nodes);
+                       return $s;
                }
                
                public function replace($s, $r) {
-                       $this->s = $s;
                        $this->r = $r;
                        $this->search = array();
                        $this->replace = array();
        
                        $this->_build_replace($r, "");
-       
                        
-                       $s = preg_replace_callback("|{{ *if *([^ }]*) *}}([^{]*){{ *endif *}}|", array($this, "_replcb_if"), $s);
+                       #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
+                       $s = $this->_build_nodes($s);
+                       $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
+                       $s = str_replace($this->search,$this->replace,$s);
                        
-                       return str_replace($this->search,$this->replace,$s);
+                       return $s;
                }
-               
-       }       
+       }
+       
        $t = new Template;