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