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<?php
class Template {
var $r;
var $search;
var $replace;
var $stack = array();
var $nodes = array();
var $done = false;
private function _preg_error(){
switch(preg_last_error()){
case PREG_INTERNAL_ERROR: die('PREG_INTERNAL_ERROR'); break;
case PREG_BACKTRACK_LIMIT_ERROR: die('PREG_BACKTRACK_LIMIT_ERROR'); break;
case PREG_RECURSION_LIMIT_ERROR: die('PREG_RECURSION_LIMIT_ERROR'); break;
case PREG_BAD_UTF8_ERROR: die('PREG_BAD_UTF8_ERROR'); break;
case PREG_BAD_UTF8_OFFSET_ERROR: die('PREG_BAD_UTF8_OFFSET_ERROR'); break;
default:
die("Unknown preg error.");
}
}
private function _build_replace($r, $prefix){
if(is_array($r) && count($r)) {
foreach ($r as $k => $v ) {
if (is_array($v))
$this->_build_replace($v, "$prefix$k.");
$this->search[] = $prefix . $k;
$this->replace[] = $v;
}
}
}
private function _push_stack(){
$this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
}
private function _pop_stack(){
list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
}
private function _get_var($name){
$keys = array_map('trim',explode(".",$name));
$val = $this->r;
foreach($keys as $k) {
$val = $val[$k];
}
return $val;
}
/**
* IF node
*
* {{ if <$var> }}...[{{ else }} ...] {{ endif }}
* {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
* {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
*/
private function _replcb_if($args){
if (strpos($args[2],"==")>0){
list($a,$b) = array_map("trim",explode("==",$args[2]));
$a = $this->_get_var($a);
if ($b[0]=="$") $b = $this->_get_var($b);
$val = ($a == $b);
} else if (strpos($args[2],"!=")>0){
list($a,$b) = explode("!=",$args[2]);
$a = $this->_get_var($a);
if ($b[0]=="$") $b = $this->_get_var($b);
$val = ($a != $b);
} else {
$val = $this->_get_var($args[2]);
}
if (isset($args[4])) {
list($strue, $sfalse)= explode($args[4], $args[3]);
} else {
$strue = $args[3]; $sfalse = "";
}
return ($val?$strue:$sfalse);
}
/**
* FOR node
*
* {{ for <$var> as $name }}...{{ endfor }}
* {{ for <$var> as $key=>$name }}...{{ endfor }}
*/
private function _replcb_for($args){
$m = array_map('trim', explode(" as ", $args[2]));
list($keyname, $varname) = explode("=>",$m[1]);
if (is_null($varname)) { $varname=$keyname; $keyname=""; }
if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
//$vals = $this->r[$m[0]];
$vals = $this->_get_var($m[0]);
$ret="";
if (!is_array($vals)) return $ret;
foreach ($vals as $k=>$v){
$this->_push_stack();
$r = $this->r;
$r[$varname] = $v;
if ($keyname!='') $r[$keyname] = $k;
$ret .= $this->replace($args[3], $r);
$this->_pop_stack();
}
return $ret;
}
/**
* INC node
*
* {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
*/
private function _replcb_inc($args){
list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
$this->_push_stack();
$r = $this->r;
if (!is_null($newctx)) {
list($a,$b) = array_map('trim', explode("=",$newctx));
$r[$a] = $this->_get_var($b);
}
$this->nodes = Array();
$tpl = get_markup_template($tplfile);
$ret = $this->replace($tpl, $r);
$this->_pop_stack();
return $ret;
}
private function _replcb_node($m) {
$node = $this->nodes[$m[1]];
if (method_exists($this, "_replcb_".$node[1])){
$s = call_user_func(array($this, "_replcb_".$node[1]), $node);
} else {
$s = "";
}
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
if ($s==Null) $this->_preg_error()
return $s;
}
private function _replcb($m){
//var_dump(array_map('htmlspecialchars', $m));
$this->done = false;
$this->nodes[] = (array) $m;
return "||". (count($this->nodes)-1) ."||";
}
private function _build_nodes($s){
$this->done = false;
while (!$this->done){
$this->done=true;
$s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
if ($s==Null) $this->_preg_error();
}
//({{ *else *}}[^{]*)?
krsort($this->nodes);
return $s;
}
public function replace($s, $r) {
$this->r = $r;
$this->search = array();
$this->replace = array();
$this->_build_replace($r, "");
#$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
$s = $this->_build_nodes($s);
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
if ($s==Null) $this->_preg_error()
$s = str_replace($this->search,$this->replace, $s);
return $s;
}
}
$t = new Template;
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