include/template_processor.php

   1 <?php
   2
   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 $lang = null;
  13
  14
  15                 private function _preg_error(){
  16                         switch(preg_last_error()){
  17                             case PREG_INTERNAL_ERROR: die('PREG_INTERNAL_ERROR'); break;
  18                             case PREG_BACKTRACK_LIMIT_ERROR: die('PREG_BACKTRACK_LIMIT_ERROR'); break;
  19                             case PREG_RECURSION_LIMIT_ERROR: die('PREG_RECURSION_LIMIT_ERROR'); break;
  20                             case PREG_BAD_UTF8_ERROR: die('PREG_BAD_UTF8_ERROR'); break;
  21                             case PREG_BAD_UTF8_OFFSET_ERROR: die('PREG_BAD_UTF8_OFFSET_ERROR'); break;
  22                             default:
  23                                         //die("Unknown preg error.");
  24                                         return;
  25                         }
  26                 }
  27
  28                 private function _build_replace($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                                         if (is_object($v))
  35                                                 $this->_build_replace($v->getKeys(), "$prefix$k.");
  36
  37                                         $this->search[] =  $prefix . $k;
  38                                         $this->replace[] = $v;
  39                                 }
  40                         }
  41                 }
  42
  43                 private function _push_stack(){
  44                         $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
  45                 }
  46                 private function _pop_stack(){
  47                         list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
  48
  49                 }
  50
  51                 private function _get_var($name){
  52                         $keys = array_map('trim',explode(".",$name));
  53                         $val = $this->r;
  54                         foreach($keys as $k) {
  55                                 $val = $val[$k];
  56                         }
  57                         return $val;
  58                 }
  59
  60                 /**
  61                  * IF node
  62                  *
  63                  * {{ if <$var> }}...[{{ else }} ...] {{ endif }}
  64                  * {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
  65                  * {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
  66                  */
  67                 private function _replcb_if($args){
  68                         if (strpos($args[2],"==")>0){
  69                                 list($a,$b) = array_map("trim",explode("==",$args[2]));
  70                                 $a = $this->_get_var($a);
  71                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  72                                 $val = ($a == $b);
  73                         } else if (strpos($args[2],"!=")>0){
  74                                 list($a,$b) = explode("!=",$args[2]);
  75                                 $a = $this->_get_var($a);
  76                                 if ($b[0]=="$") $b =  $this->_get_var($b);
  77                                 $val = ($a != $b);
  78                         } else {
  79                                 $val = $this->_get_var($args[2]);
  80                         }
  81                         list($strue, $sfalse)= preg_split("|{{ *else *}}|", $args[3]);
  82                         return ($val?$strue:$sfalse);
  83                 }
  84
  85                 /**
  86                  * FOR node
  87                  *
  88                  * {{ for <$var> as $name }}...{{ endfor }}
  89                  * {{ for <$var> as $key=>$name }}...{{ endfor }}
  90                  */
  91                 private function _replcb_for($args){
  92                         $m = array_map('trim', explode(" as ", $args[2]));
  93                         list($keyname, $varname) = explode("=>",$m[1]);
  94                         if (is_null($varname)) { $varname=$keyname; $keyname=""; }
  95                         if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
  96                         //$vals = $this->r[$m[0]];
  97                         $vals = $this->_get_var($m[0]);
  98                         $ret="";
  99                         if (!is_array($vals)) return $ret;
 100                         foreach ($vals as $k=>$v){
 101                                 $this->_push_stack();
 102                                 $r = $this->r;
 103                                 $r[$varname] = $v;
 104                                 if ($keyname!='') $r[$keyname] = $k;
 105                                 $ret .=  $this->replace($args[3], $r);
 106                                 $this->_pop_stack();
 107                         }
 108                         return $ret;
 109                 }
 110
 111                 /**
 112                  * INC node
 113                  *
 114                  * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
 115                  */
 116                 private function _replcb_inc($args){
 117                         list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
 118                         $this->_push_stack();
 119                         $r = $this->r;
 120                         if (!is_null($newctx)) {
 121                                 list($a,$b) = array_map('trim', explode("=",$newctx));
 122                                 $r[$a] = $this->_get_var($b);
 123                         }
 124                         $this->nodes = Array();
 125                         $tpl = get_markup_template($tplfile);
 126                         $ret = $this->replace($tpl, $r);
 127                         $this->_pop_stack();
 128                         return $ret;
 129
 130                 }
 131
 132                 private function _replcb_node($m) {
 133                         $node = $this->nodes[$m[1]];
 134                         if (method_exists($this, "_replcb_".$node[1])){
 135                                 $s = call_user_func(array($this, "_replcb_".$node[1]),  $node);
 136                         } else {
 137                                 $s = "";
 138                         }
 139                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 140                         return $s;
 141                 }
 142
 143                 private function _replcb($m){
 144                         //var_dump(array_map('htmlspecialchars', $m));
 145                         $this->done = false;
 146                         $this->nodes[] = (array) $m;
 147                         return "||". (count($this->nodes)-1) ."||";
 148                 }
 149
 150                 private function _build_nodes($s){
 151                         $this->done = false;
 152                         while (!$this->done){
 153                                 $this->done=true;
 154                                 $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
 155                                 if ($s==Null) $this->_preg_error();
 156                         }
 157                         //({{ *else *}}[^{]*)?
 158                         krsort($this->nodes);
 159                         return $s;
 160                 }
 161
 162                 private function _get_lang(){
 163                         if ($this->lang!=null) return $this->lang;
 164
 165                         $a = get_app();
 166                         $this->lang=array();
 167                         if(is_array($a->strings) && count($a->strings)) {
 168                                 foreach ($a->strings as $k=>$v){
 169                                         $k =  preg_replace("/[^a-z0-9-]/", "", str_replace(" ","-", strtolower($k)));
 170                                         $this->lang[$k] = $v;
 171                                 }
 172                         }
 173                         return $this->lang;
 174                 }
 175
 176
 177                 public function replace($s, $r) {
 178                         if (!x($r,'$lang')){
 179                                 $r['$lang'] = &$this->_get_lang();
 180                         }
 181                         $this->r = $r;
 182                         $this->search = array();
 183                         $this->replace = array();
 184                         $this->_build_replace($r, "");
 185                         #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
 186                         $s = $this->_build_nodes($s);
 187                         $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
 188                         if ($s==Null) $this->_preg_error();
 189
 190                         // remove comments block
 191                         $s = preg_replace('/{#[^#]*#}/', "" , $s);
 192
 193                         // replace strings recursively (limit to 10 loops)
 194                         $os = ""; $count=0;
 195                         while($os!=$s && $count<10){
 196                                 $os=$s; $count++;
 197                                 $s = str_replace($this->search,$this->replace, $s);
 198                         }
 199                         return $s;
 200                 }
 201         }
 202
 203         $t = new Template;