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                         if (isset($args[4])) {
  75                                 list($strue, $sfalse)= explode($args[4], $args[3]);
  76                         } else {
  77                                 $strue = $args[3]; $sfalse = "";
  78                         }
  79
  80                         return ($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"), $s);
 138                         if ($s==Null) $this->_preg_error()
 139                         return $s;
 140                 }
 141
 142                 private function _replcb($m){
 143                         //var_dump(array_map('htmlspecialchars', $m));
 144                         $this->done = false;
 145                         $this->nodes[] = (array) $m;
 146                         return "||". (count($this->nodes)-1) ."||";
 147                 }
 148
 149                 private function _build_nodes($s){
 150                         $this->done = false;
 151                         while (!$this->done){
 152                                 $this->done=true;
 153                                 $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
 154                                 if ($s==Null) $this->_preg_error();
 155                         }
 156                         //({{ *else *}}[^{]*)?
 157                         krsort($this->nodes);
 158                         return $s;
 159                 }
 160
 161                 public function replace($s, $r) {
 162                         $this->r = $r;
 163                         $this->search = array();
 164                         $this->replace = array();
 165
 166                         $this->_build_replace($r, "");
 167
 168                         #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
 169                         $s = $this->_build_nodes($s);
 170                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 171                         if ($s==Null) $this->_preg_error()
 172                         $s = str_replace($this->search,$this->replace, $s);
 173
 174                         return $s;
 175                 }
 176         }
 177
 178         $t = new Template;