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 $d = false;
  11
  12                 private function _preg_error(){
  13                         switch(preg_last_error()){
  14                             case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break;
  15                             case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break;
  16                             case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break;
  17                             case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break;
  18                             case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break;
  19                             default:
  20                                         //die("Unknown preg error.");
  21                                         return;
  22                         }
  23                         echo "<hr><pre>";
  24                         debug_print_backtrace();
  25                         die();
  26                 }
  27
  28                 private function _build_replace($r, $prefix){
  29
  30                         if(is_array($r) && count($r)) {
  31                                 foreach ($r as $k => $v ) {
  32                                         if (is_array($v))
  33                                                 $this->_build_replace($v, "$prefix$k.");
  34
  35                                         $this->search[] =  $prefix . $k;
  36                                         $this->replace[] = $v;
  37                                 }
  38                         }
  39                 }
  40
  41                 private function _push_stack(){
  42                         $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
  43                 }
  44                 private function _pop_stack(){
  45                         list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
  46
  47                 }
  48
  49                 private function _get_var($name){
  50                         $keys = array_map('trim',explode(".",$name));
  51                         $val = $this->r;
  52                         foreach($keys as $k) {
  53                                 $val = $val[$k];
  54                         }
  55                         return $val;
  56                 }
  57
  58                 /**
  59                  * IF node
  60                  *
  61                  * {{ if <$var> }}...[{{ else }} ...] {{ endif }}
  62                  * {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
  63                  * {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
  64                  */
  65                 private function _replcb_if($args){
  66                         if (strpos($args[2],"==")>0){
  67                                 list($a,$b) = array_map("trim",explode("==",$args[2]));
  68                                 $a = $this->_get_var($a);
  69                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  70                                 $val = ($a == $b);
  71                         } else if (strpos($args[2],"!=")>0){
  72                                 list($a,$b) = explode("!=",$args[2]);
  73                                 $a = $this->_get_var($a);
  74                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  75                                 $val = ($a != $b);
  76                         } else {
  77                                 $val = $this->_get_var($args[2]);
  78                         }
  79                         list($strue, $sfalse)= preg_split("|{{ *else *}}|", $args[3]);
  80                         return ($val?$strue:$sfalse);
  81                 }
  82
  83                 /**
  84                  * FOR node
  85                  *
  86                  * {{ for <$var> as $name }}...{{ endfor }}
  87                  * {{ for <$var> as $key=>$name }}...{{ endfor }}
  88                  */
  89                 private function _replcb_for($args){
  90                         $m = array_map('trim', explode(" as ", $args[2]));
  91                         list($keyname, $varname) = explode("=>",$m[1]);
  92                         if (is_null($varname)) { $varname=$keyname; $keyname=""; }
  93                         if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
  94                         //$vals = $this->r[$m[0]];
  95                         $vals = $this->_get_var($m[0]);
  96                         $ret="";
  97                         if (!is_array($vals)) return $ret;
  98                         foreach ($vals as $k=>$v){
  99                                 $this->_push_stack();
 100                                 $r = $this->r;
 101                                 $r[$varname] = $v;
 102                                 if ($keyname!='') $r[$keyname] = $k;
 103                                 $ret .=  $this->replace($args[3], $r);
 104                                 $this->_pop_stack();
 105                         }
 106                         return $ret;
 107                 }
 108
 109                 /**
 110                  * INC node
 111                  *
 112                  * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
 113                  */
 114                 private function _replcb_inc($args){
 115                         list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
 116                         $this->_push_stack();
 117                         $r = $this->r;
 118                         if (!is_null($newctx)) {
 119                                 list($a,$b) = array_map('trim', explode("=",$newctx));
 120                                 $r[$a] = $this->_get_var($b);
 121                         }
 122                         $this->nodes = Array();
 123                         $tpl = get_markup_template($tplfile);
 124                         $ret = $this->replace($tpl, $r);
 125                         $this->_pop_stack();
 126                         return $ret;
 127
 128                 }
 129
 130                 private function _replcb_node($m) {
 131                         $node = $this->nodes[$m[1]];
 132                         if (method_exists($this, "_replcb_".$node[1])){
 133                                 $s = call_user_func(array($this, "_replcb_".$node[1]),  $node);
 134                         } else {
 135                                 $s = "";
 136                         }
 137                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 138                         return $s;
 139                 }
 140
 141                 private function _replcb($m){
 142                         //var_dump(array_map('htmlspecialchars', $m));
 143                         $this->done = false;
 144                         $this->nodes[] = (array) $m;
 145                         return "||". (count($this->nodes)-1) ."||";
 146                 }
 147
 148                 private function _build_nodes($s){
 149                         $this->done = false;
 150                         while (!$this->done){
 151                                 $this->done=true;
 152                                 $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
 153                                 if ($s==Null) $this->_preg_error();
 154                         }
 155                         //({{ *else *}}[^{]*)?
 156                         krsort($this->nodes);
 157                         return $s;
 158                 }
 159
 160                 public function replace($s, $r) {
 161                         $this->r = $r;
 162                         $this->search = array();
 163                         $this->replace = array();
 164
 165                         $this->_build_replace($r, "");
 166
 167                         #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
 168                         $s = $this->_build_nodes($s);
 169                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 170                         if ($s==Null) $this->_preg_error();
 171
 172                         // remove comments block
 173                         $s = preg_replace('/{#[^#]*#}/', "" , $s);
 174
 175                         // replace strings recursively (limit to 10 loops)
 176                         $os = ""; $count=0;
 177                         while($os!=$s && $count<10){
 178                                 $os=$s; $count++;
 179                                 $s = str_replace($this->search,$this->replace, $s);
 180                         }
 181                         return $s;
 182                 }
 183         }
 184
 185         $t = new Template;