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Reworked template processor. support for "if" "for" and "inc" blocks, also nested

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This commit is contained in:
Fabio Comuni 2011-04-21 17:03:19 +02:00
parent 1fb097951d
commit e472d79b1e
1 changed files with 100 additions and 13 deletions
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111
include/template_processor.php
View file

@ -1,11 +1,12 @@
<?php
class Template {
var $s;
var $r;
var $search;
var $replace;
var $stack = array();
var $nodes = array();
var $done = false;
private function _build_replace($r, $prefix){
@ -20,31 +21,117 @@
}
}
private function _replcb_if($m){
//echo "<pre>"; var_dump($m);
$keys = explode(".",$m[1]);
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;
}
//echo $val;
return ($val?$m[2]:"");
/**
* IF node
*
* {{ if <$var> }}...{{ endif }}
*/
private function _replcb_if($args){
$val = $this->_get_var($args[2]);
return ($val?$args[3]:"");
}
/**
* 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]];
$ret="";
if (!is_array($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();
$tpl = load_view_file($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])){
return call_user_func(array($this, "_replcb_".$node[1]), $node);
} else {
return "";
}
}
private function _replcb($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;
$s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*){{ *end\1 *}}|', array($this, "_replcb"), $s);
}
krsort($this->nodes);
return $s;
}
public function replace($s, $r) {
$this->s = $s;
$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);
$s = str_replace($this->search,$this->replace,$s);
$s = preg_replace_callback("|{{ *if *([^ }]*) *}}([^{]*){{ *endif *}}|", array($this, "_replcb_if"), $s);
return str_replace($this->search,$this->replace,$s);
return $s;
}
}
}
$t = new Template;