include/template_processor.php

   1 <?php
   2
   3         class Template {
   4                 var $r;
   5                 var $search;
   6                 var $replace;
   7                 var $stack = array();
   8                 var $nodes = array();
   9                 var $done = false;
  10
  11                 private function _build_replace($r, $prefix){
  12
  13                         if(is_array($r) && count($r)) {
  14                                 foreach ($r as $k => $v ) {
  15                                         if (is_array($v))
  16                                                 $this->_build_replace($v, "$prefix$k.");
  17
  18                                         $this->search[] =  $prefix . $k;
  19                                         $this->replace[] = $v;
  20                                 }
  21                         }
  22                 }
  23
  24                 private function _push_stack(){
  25                         $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
  26                 }
  27                 private function _pop_stack(){
  28                         list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
  29                 }
  30
  31                 private function _get_var($name){
  32                         $keys = array_map('trim',explode(".",$name));
  33                         $val = $this->r;
  34                         foreach($keys as $k) {
  35                                 $val = $val[$k];
  36                         }
  37                         return $val;
  38                 }
  39
  40                 /**
  41                  * IF node
  42                  *
  43                  * {{ if <$var> }}...{{ endif }}
  44                  */
  45                 private function _replcb_if($args){
  46                         $val = $this->_get_var($args[2]);
  47                         return ($val?$args[3]:"");
  48                 }
  49
  50                 /**
  51                  * FOR node
  52                  *
  53                  * {{ for <$var> as $name }}...{{ endfor }}
  54                  * {{ for <$var> as $key=>$name }}...{{ endfor }}
  55                  */
  56                 private function _replcb_for($args){
  57                         $m = array_map('trim', explode(" as ", $args[2]));
  58                         list($keyname, $varname) = explode("=>",$m[1]);
  59                         if (is_null($varname)) { $varname=$keyname; $keyname=""; }
  60                         if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
  61                         $vals = $this->r[$m[0]];
  62                         $ret="";
  63                         if (!is_array($vals)) return $ret;
  64                         foreach ($vals as $k=>$v){
  65                                 $this->_push_stack();
  66                                 $r = $this->r;
  67                                 $r[$varname] = $v;
  68                                 if ($keyname!='') $r[$keyname] = $k;
  69                                 $ret .=  $this->replace($args[3], $r);
  70                                 $this->_pop_stack();
  71                         }
  72                         return $ret;
  73                 }
  74
  75                 /**
  76                  * INC node
  77                  *
  78                  * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
  79                  */
  80                 private function _replcb_inc($args){
  81                         list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
  82                         $this->_push_stack();
  83                         $r = $this->r;
  84                         if (!is_null($newctx)) {
  85                                 list($a,$b) = array_map('trim', explode("=",$newctx));
  86                                 $r[$a] = $this->_get_var($b);
  87                         }
  88                         $this->nodes = Array();
  89                         $tpl = load_view_file($tplfile);
  90                         $ret = $this->replace($tpl, $r);
  91                         $this->_pop_stack();
  92                         return $ret;
  93
  94                 }
  95
  96                 private function _replcb_node($m) {
  97                         $node = $this->nodes[$m[1]];
  98                         if (method_exists($this, "_replcb_".$node[1])){
  99                                 return call_user_func(array($this, "_replcb_".$node[1]),  $node);
 100                         } else {
 101                                 return "";
 102                         }
 103                 }
 104
 105                 private function _replcb($m){
 106                         $this->done = false;
 107                         $this->nodes[] = (array) $m;
 108                         return "||". (count($this->nodes)-1) ."||";
 109                 }
 110
 111                 private function _build_nodes($s){
 112                         $this->done = false;
 113                         while (!$this->done){
 114                                 $this->done=true;
 115                                 $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*){{ *end\1 *}}|', array($this, "_replcb"), $s);
 116                         }
 117                         krsort($this->nodes);
 118                         return $s;
 119                 }
 120
 121                 public function replace($s, $r) {
 122                         $this->r = $r;
 123                         $this->search = array();
 124                         $this->replace = array();
 125
 126                         $this->_build_replace($r, "");
 127
 128                         #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
 129                         $s = $this->_build_nodes($s);
 130                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 131                         $s = str_replace($this->search,$this->replace,$s);
 132
 133                         return $s;
 134                 }
 135         }
 136
 137         $t = new Template;