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<?php
require_once 'include/ITemplateEngine.php';
define ("KEY_NOT_EXISTS", '^R_key_not_Exists^');
class Template implements ITemplateEngine {
static $name ="internal";
var $r;
var $search;
var $replace;
var $stack = array();
var $nodes = array();
var $done = false;
var $d = false;
var $lang = null;
var $debug=false;
private function _preg_error() {
switch(preg_last_error()) {
case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break;
case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break;
case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break;
case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break;
// This is only valid for php > 5.3, not certain how to code around it for unit tests
// case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break;
default:
//die("Unknown preg error.");
return;
}
echo "<hr><pre>";
debug_print_backtrace();
die();
}
private function _push_stack() {
$this->stack[] = array($this->r, $this->nodes);
}
private function _pop_stack(){
list($this->r, $this->nodes) = array_pop($this->stack);
}
private function _get_var($name, $retNoKey=false) {
$keys = array_map('trim',explode(".",$name));
if ($retNoKey && !array_key_exists($keys[0], $this->r))
return KEY_NOT_EXISTS;
$val = $this->r;
foreach($keys as $k) {
$val = (isset($val[$k]) ? $val[$k] : null);
}
return template_escape($val);
}
/**
* IF node
* \code
* {{ if <$var> }}...[{{ else }} ...] {{ endif }}
* {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }}
* {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }}
* \endcode
*/
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) = array_map("trim", 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]);
}
$x = preg_split("|{{ *else *}}|", $args[3]);
return ( ($val) ? $x[0] : (isset($x[1]) ? $x[1] : ""));
}
/**
* FOR node
* \code
* {{ for <$var> as $name }}...{{ endfor }}
* {{ for <$var> as $key=>$name }}...{{ endfor }}
* \endcode
*/
private function _replcb_for($args) {
$m = array_map('trim', explode(" as ", $args[2]));
$x = explode("=>",$m[1]);
if (count($x) == 1) {
$varname = $x[0];
$keyname = "";
} else {
list($keyname, $varname) = $x;
}
if ($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 === 0) ? '0' : $k);
$ret .= $this->replace($args[3], $r);
$this->_pop_stack();
}
return $ret;
}
/**
* INC node
* \code
* {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
* \endcode
*/
private function _replcb_inc($args) {
if (strpos($args[2],"with")) {
list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
} else {
$tplfile = trim($args[2]);
$newctx = null;
}
if ($tplfile[0]=="$") $tplfile = $this->_get_var($tplfile);
$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;
}
/**
* DEBUG node
* \code
* {{ debug $var [$var [$var [...]]] }}{{ enddebug }}
* \endcode
* replace node with <pre>var_dump($var, $var, ...);</pre>
*/
private function _replcb_debug($args) {
$vars = array_map('trim', explode(" ",$args[2]));
$vars[] = $args[1];
$ret = "<pre>";
foreach ($vars as $var){
$ret .= htmlspecialchars(var_export( $this->_get_var($var), true ));
$ret .= "\n";
}
$ret .= "</pre>";
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);
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 $s;
}
private function var_replace($s) {
$m = array();
/** regexp:
* \$ literal $
* (\[)? optional open square bracket
* ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional
* dot, repeated at least 1 time
* (?(1)\]) if there was opened square bracket
* (subgrup 1), match close bracket
*/
if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(?(1)\])/', $s,$m)) {
foreach ($m[0] as $var) {
$exp = str_replace(array("[", "]"), array("", ""), $var);
$exptks = explode("|", $exp);
$varn = $exptks[0];
unset($exptks[0]);
$val = $this->_get_var($varn, true);
if ($val != KEY_NOT_EXISTS) {
/* run filters */
/*
* Filter are in form of:
* filtername:arg:arg:arg
*
* "filtername" is function name
* "arg"s are optional, var value is appended to the end
* if one "arg"==='x' , is replaced with var value
*
* examples:
* $item.body|htmlspecialchars // escape html chars
* $item.body|htmlspecialchars|strtoupper // escape html and uppercase result
* $item.created|date:%Y %M %j // format date (created is a timestamp)
* $item.body|str_replace:cat:dog // replace all "cat" with "dog"
* $item.body|str_replace:cat:dog:x:1 // replace one "cat" with "dog"
*/
foreach ($exptks as $filterstr) {
$filter = explode(":", $filterstr);
$filtername = $filter[0];
unset($filter[0]);
$valkey = array_search("x", $filter);
if ($valkey === false) {
$filter[] = $val;
} else {
$filter[$valkey] = $val;
}
if (function_exists($filtername)) {
$val = call_user_func_array($filtername, $filter);
}
}
$s = str_replace($var, $val, $s);
}
}
}
return $s;
}
private function replace($s, $r) {
$this->replace_macros($s, $r);
}
// TemplateEngine interface
public function replace_macros($s, $r) {
$this->r = $r;
$s = $this->_build_nodes($s);
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
if ($s == Null)
$this->_preg_error();
// remove comments block
$s = preg_replace('/{#[^#]*#}/', "" , $s);
//$t2 = dba_timer();
// replace strings recursively (limit to 10 loops)
$os = "";
$count=0;
while (($os !== $s) && $count<10) {
$os=$s;
$count++;
$s = $this->var_replace($s);
}
return $s;
}
public function get_markup_template($file, $root='') {
$template_file = theme_include($file, $root);
if ($template_file) {
$content = file_get_contents($template_file);
}
return $content;
}
}
function template_escape($s) {
return str_replace(array('$','{{'),array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),$s);
}
function template_unescape($s) {
return str_replace(array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),array('$','{{'),$s);
}
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