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                 var $d = false;
  11
  12                 private function _preg_error(){
  13                         switch(preg_last_error()){
  14                             case PREG_INTERNAL_ERROR: die('PREG_INTERNAL_ERROR'); break;
  15                             case PREG_BACKTRACK_LIMIT_ERROR: die('PREG_BACKTRACK_LIMIT_ERROR'); break;
  16                             case PREG_RECURSION_LIMIT_ERROR: die('PREG_RECURSION_LIMIT_ERROR'); break;
  17                             case PREG_BAD_UTF8_ERROR: die('PREG_BAD_UTF8_ERROR'); break;
  18                             case PREG_BAD_UTF8_OFFSET_ERROR: die('PREG_BAD_UTF8_OFFSET_ERROR'); break;
  19                             default:
  20                                         //die("Unknown preg error.");
  21                                         return;
  22                         }
  23                 }
  24
  25                 private function _build_replace($r, $prefix){
  26
  27                         if(is_array($r) && count($r)) {
  28                                 foreach ($r as $k => $v ) {
  29                                         if (is_array($v))
  30                                                 $this->_build_replace($v, "$prefix$k.");
  31
  32                                         $this->search[] =  $prefix . $k;
  33                                         $this->replace[] = $v;
  34                                 }
  35                         }
  36                 }
  37
  38                 private function _push_stack(){
  39                         $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
  40                 }
  41                 private function _pop_stack(){
  42                         list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
  43
  44                 }
  45
  46                 private function _get_var($name){
  47                         $keys = array_map('trim',explode(".",$name));
  48                         $val = $this->r;
  49                         foreach($keys as $k) {
  50                                 $val = $val[$k];
  51                         }
  52                         return $val;
  53                 }
  54
  55                 /**
  56                  * IF node
  57                  *
  58                  * {{ if <$var> }}...[{{ else }} ...] {{ endif }}
  59                  * {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
  60                  * {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
  61                  */
  62                 private function _replcb_if($args){
  63                         if (strpos($args[2],"==")>0){
  64                                 list($a,$b) = array_map("trim",explode("==",$args[2]));
  65                                 $a = $this->_get_var($a);
  66                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  67                                 $val = ($a == $b);
  68                         } else if (strpos($args[2],"!=")>0){
  69                                 list($a,$b) = explode("!=",$args[2]);
  70                                 $a = $this->_get_var($a);
  71                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  72                                 $val = ($a != $b);
  73                         } else {
  74                                 $val = $this->_get_var($args[2]);
  75                         }
  76                         list($strue, $sfalse)= preg_split("|{{ *else *}}|", $args[3]);
  77                         return ($val?$strue:$sfalse);
  78                 }
  79
  80                 /**
  81                  * FOR node
  82                  *
  83                  * {{ for <$var> as $name }}...{{ endfor }}
  84                  * {{ for <$var> as $key=>$name }}...{{ endfor }}
  85                  */
  86                 private function _replcb_for($args){
  87                         $m = array_map('trim', explode(" as ", $args[2]));
  88                         list($keyname, $varname) = explode("=>",$m[1]);
  89                         if (is_null($varname)) { $varname=$keyname; $keyname=""; }
  90                         if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
  91                         //$vals = $this->r[$m[0]];
  92                         $vals = $this->_get_var($m[0]);
  93                         $ret="";
  94                         if (!is_array($vals)) return $ret;
  95                         foreach ($vals as $k=>$v){
  96                                 $this->_push_stack();
  97                                 $r = $this->r;
  98                                 $r[$varname] = $v;
  99                                 if ($keyname!='') $r[$keyname] = $k;
 100                                 $ret .=  $this->replace($args[3], $r);
 101                                 $this->_pop_stack();
 102                         }
 103                         return $ret;
 104                 }
 105
 106                 /**
 107                  * INC node
 108                  *
 109                  * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
 110                  */
 111                 private function _replcb_inc($args){
 112                         list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
 113                         $this->_push_stack();
 114                         $r = $this->r;
 115                         if (!is_null($newctx)) {
 116                                 list($a,$b) = array_map('trim', explode("=",$newctx));
 117                                 $r[$a] = $this->_get_var($b);
 118                         }
 119                         $this->nodes = Array();
 120                         $tpl = get_markup_template($tplfile);
 121                         $ret = $this->replace($tpl, $r);
 122                         $this->_pop_stack();
 123                         return $ret;
 124
 125                 }
 126
 127                 private function _replcb_node($m) {
 128                         $node = $this->nodes[$m[1]];
 129                         if (method_exists($this, "_replcb_".$node[1])){
 130                                 $s = call_user_func(array($this, "_replcb_".$node[1]),  $node);
 131                         } else {
 132                                 $s = "";
 133                         }
 134                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 135                         return $s;
 136                 }
 137
 138                 private function _replcb($m){
 139                         //var_dump(array_map('htmlspecialchars', $m));
 140                         $this->done = false;
 141                         $this->nodes[] = (array) $m;
 142                         return "||". (count($this->nodes)-1) ."||";
 143                 }
 144
 145                 private function _build_nodes($s){
 146                         $this->done = false;
 147                         while (!$this->done){
 148                                 $this->done=true;
 149                                 $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
 150                                 if ($s==Null) $this->_preg_error();
 151                         }
 152                         //({{ *else *}}[^{]*)?
 153                         krsort($this->nodes);
 154                         return $s;
 155                 }
 156
 157                 public function replace($s, $r) {
 158                         $this->r = $r;
 159                         $this->search = array();
 160                         $this->replace = array();
 161
 162                         $this->_build_replace($r, "");
 163
 164                         #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
 165                         $s = $this->_build_nodes($s);
 166                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 167                         if ($s==Null) $this->_preg_error();
 168
 169                         // remove comments block
 170                         $s = preg_replace('/{#[^#]*#}/', "" , $s);
 171
 172                         // replace strings recursively (limit to 10 loops)
 173                         $os = ""; $count=0;
 174                         while($os!=$s && $count<10){
 175                                 $os=$s; $count++;
 176                                 $s = str_replace($this->search,$this->replace, $s);
 177                         }
 178                         return $s;
 179                 }
 180         }
 181
 182         $t = new Template;