include/template_processor.php

   1 <?php
   2         define ("KEY_NOT_EXISTS", '^R_key_not_Exists^');
   3
   4         class Template {
   5                 var $r;
   6                 var $search;
   7                 var $replace;
   8                 var $stack = array();
   9                 var $nodes = array();
  10                 var $done = false;
  11                 var $d = false;
  12                 var $lang = null;
  13                 var $debug=false;
  14
  15                 private function _preg_error(){
  16                         switch(preg_last_error()){
  17                             case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break;
  18                             case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break;
  19                             case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break;
  20                             case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break;
  21                             case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break;
  22                             default:
  23                                         //die("Unknown preg error.");
  24                                         return;
  25                         }
  26                         echo "<hr><pre>";
  27                         debug_print_backtrace();
  28                         die();
  29                 }
  30
  31
  32                 private function _push_stack(){
  33                         $this->stack[] = array($this->r, $this->nodes);
  34                 }
  35                 private function _pop_stack(){
  36                         list($this->r, $this->nodes) = array_pop($this->stack);
  37
  38                 }
  39
  40                 private function _get_var($name, $retNoKey=false){
  41                         $keys = array_map('trim',explode(".",$name));
  42                         if ($retNoKey && !array_key_exists($keys[0], $this->r)) return KEY_NOT_EXISTS;
  43                         $val = $this->r;
  44                         foreach($keys as $k) {
  45                                 $val = (isset($val[$k]) ? $val[$k] : null);
  46                         }
  47                         return $val;
  48                 }
  49
  50                 /**
  51                  * IF node
  52                  *
  53                  * {{ if <$var> }}...[{{ else }} ...] {{ endif }}
  54                  * {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
  55                  * {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
  56                  */
  57                 private function _replcb_if($args){
  58                         if (strpos($args[2],"==")>0){
  59                                 list($a,$b) = array_map("trim",explode("==",$args[2]));
  60                                 $a = $this->_get_var($a);
  61                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  62                                 $val = ($a == $b);
  63                         } else if (strpos($args[2],"!=")>0){
  64                                 list($a,$b) = explode("!=",$args[2]);
  65                                 $a = $this->_get_var($a);
  66                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  67                                 $val = ($a != $b);
  68                         } else {
  69                                 $val = $this->_get_var($args[2]);
  70                         }
  71                         $x = preg_split("|{{ *else *}}|", $args[3]);
  72                         return ( $val ? $x[0] : (isset($x[1]) ? $x[1] : ""));
  73                 }
  74
  75                 /**
  76                  * FOR node
  77                  *
  78                  * {{ for <$var> as $name }}...{{ endfor }}
  79                  * {{ for <$var> as $key=>$name }}...{{ endfor }}
  80                  */
  81                 private function _replcb_for($args){
  82                         $m = array_map('trim', explode(" as ", $args[2]));
  83                         list($keyname, $varname) = explode("=>",$m[1]);
  84                         if (is_null($varname)) { $varname=$keyname; $keyname=""; }
  85                         if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
  86                         //$vals = $this->r[$m[0]];
  87                         $vals = $this->_get_var($m[0]);
  88                         $ret="";
  89                         if (!is_array($vals)) return $ret;
  90                         foreach ($vals as $k=>$v){
  91                                 $this->_push_stack();
  92                                 $r = $this->r;
  93                                 $r[$varname] = $v;
  94                                 if ($keyname!='') $r[$keyname] = $k;
  95                                 $ret .=  $this->replace($args[3], $r);
  96                                 $this->_pop_stack();
  97                         }
  98                         return $ret;
  99                 }
 100
 101                 /**
 102                  * INC node
 103                  *
 104                  * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
 105                  */
 106                 private function _replcb_inc($args){
 107                         if (strpos($args[2],"with")) {
 108                                 list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
 109                         } else {
 110                                 $tplfile = trim($args[2]);
 111                                 $newctx = null;
 112                         }
 113
 114                         if ($tplfile[0]=="$") $tplfile = $this->_get_var($tplfile);
 115
 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 $s;
 158                 }
 159
 160
 161                 private function var_replace($s){
 162                         $m = array();
 163                         /** regexp:
 164                          * \$                                           literal $
 165                          * (\[)?                                        optional open square bracket
 166                          * ([a-zA-Z0-9-_]+\.?)+         var name, followed by optional
 167                          *                                                      dot, repeated at least 1 time
 168                          * (?(1)\])                                     if there was opened square bracket
 169                          *                                                      (subgrup 1), match close bracket
 170                          */
 171                         if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(?(1)\])/', $s,$m)){
 172
 173                                 foreach($m[0] as $var){
 174                                         $varn = str_replace(array("[","]"), array("",""), $var);
 175                                         $val = $this->_get_var($varn, true);
 176                                         if ($val!=KEY_NOT_EXISTS)
 177                                                 $s = str_replace($var, $val, $s);
 178                                 }
 179                         }
 180
 181                         return $s;
 182                 }
 183
 184                 public function replace($s, $r) {
 185                         $this->r = $r;
 186
 187                         $s = $this->_build_nodes($s);
 188
 189                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 190                         if ($s==Null) $this->_preg_error();
 191
 192                         // remove comments block
 193                         $s = preg_replace('/{#[^#]*#}/', "" , $s);
 194
 195                         // replace strings recursively (limit to 10 loops)
 196                         $os = ""; $count=0;
 197                         while($os!=$s && $count<10){
 198                                 $os=$s; $count++;
 199                                 $s = $this->var_replace($s);
 200                         }
 201                         return template_unescape($s);
 202                 }
 203         }
 204
 205         $t = new Template;
 206
 207
 208
 209
 210 function template_escape($s) {
 211
 212         return str_replace(array('$','{{'),array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),$s);
 213
 214
 215 }
 216
 217 function template_unescape($s) {
 218
 219         return str_replace(array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),array('$','{{'),$s);
 220
 221
 222
 223 }