template_processor: add filter support to variables

This commit is contained in:
Fabrixxm 2012-12-14 10:10:33 -05:00
parent 6b36863dd8
commit 71751ecb8c

View file

@ -1,250 +1,295 @@
<?php <?php
define ("KEY_NOT_EXISTS", '^R_key_not_Exists^');
class Template { define("KEY_NOT_EXISTS", '^R_key_not_Exists^');
var $r;
var $search; class Template {
var $replace;
var $stack = array(); var $r;
var $nodes = array(); var $search;
var $done = false; var $replace;
var $d = false; var $stack = array();
var $lang = null; var $nodes = array();
var $debug=false; var $done = false;
var $d = false;
private function _preg_error(){ var $lang = null;
var $debug = false;
switch(preg_last_error()){
case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break; private function _preg_error() {
case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break;
case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break; switch (preg_last_error()) {
case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break; case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR');
// This is only valid for php > 5.3, not certain how to code around it for unit tests break;
// case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break; case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR');
default: break;
//die("Unknown preg error."); case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR');
return; break;
} case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR');
echo "<hr><pre>"; break;
debug_print_backtrace(); // This is only valid for php > 5.3, not certain how to code around it for unit tests
die(); // 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();
private function _push_stack(){ die();
$this->stack[] = array($this->r, $this->nodes); }
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);
} }
private function _pop_stack(){ return $val;
list($this->r, $this->nodes) = array_pop($this->stack); }
/**
* 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) = 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 *}}|", $args[3]);
private function _get_var($name, $retNoKey=false){ return ( $val ? $x[0] : (isset($x[1]) ? $x[1] : ""));
$keys = array_map('trim',explode(".",$name)); }
if ($retNoKey && !array_key_exists($keys[0], $this->r)) return KEY_NOT_EXISTS;
$val = $this->r; /**
foreach($keys as $k) { * FOR node
$val = (isset($val[$k]) ? $val[$k] : null); *
} * {{ for <$var> as $name }}...{{ endfor }}
return $val; * {{ for <$var> as $key=>$name }}...{{ endfor }}
*/
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 " . $varname . "'");
* IF node //$vals = $this->r[$m[0]];
* $vals = $this->_get_var($m[0]);
* {{ if <$var> }}...[{{ else }} ...] {{ endif }} $ret = "";
* {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }} if (!is_array($vals))
* {{ 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) = 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]) ? $x[1] : ""));
}
/**
* FOR node
*
* {{ for <$var> as $name }}...{{ endfor }}
* {{ for <$var> as $key=>$name }}...{{ endfor }}
*/
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; return $ret;
} foreach ($vals as $k => $v) {
/**
* INC node
*
* {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
*/
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(); $this->_push_stack();
$r = $this->r; $r = $this->r;
if (!is_null($newctx)) { $r[$varname] = $v;
list($a,$b) = array_map('trim', explode("=",$newctx)); if ($keyname != '')
$r[$a] = $this->_get_var($b); $r[$keyname] = (($k === 0) ? '0' : $k);
} $ret .= $this->replace($args[3], $r);
$this->nodes = Array();
$tpl = get_markup_template($tplfile);
$ret = $this->replace($tpl, $r);
$this->_pop_stack(); $this->_pop_stack();
return $ret;
} }
return $ret;
/** }
* DEBUG node
* /**
* {{ debug $var [$var [$var [...]]] }}{{ enddebug }} * INC node
* *
* replace node with <pre>var_dump($var, $var, ...);</pre> * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
*/
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
*
* {{ debug $var [$var [$var [...]]] }}{{ enddebug }}
*
* replace node with <pre>var_dump($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 $
* (\[)? optional open square bracket
* ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional
* dot, repeated at least 1 time
* (|[a-zA-Z0-9-_:]+)* pipe followed by filter name and args, zero or many
* (?(1)\]) if there was opened square bracket
* (subgrup 1), match close bracket
*/ */
private function _replcb_debug($args){ if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(\|[a-zA-Z0-9-_:]+)*(?(1)\])/', $s, $m)) {
$vars = array_map('trim', explode(" ",$args[2])); foreach ($m[0] as $var) {
$vars[] = $args[1];
$ret = "<pre>"; $exp = str_replace(array("[", "]"), array("", ""), $var);
foreach ($vars as $var){ $exptks = explode("|", $exp);
$ret .= htmlspecialchars(var_export( $this->_get_var($var), true ));
$ret .= "\n";
}
$ret .= "</pre>";
return $ret;
}
private function _replcb_node($m) { $varn = $exptks[0];
$node = $this->nodes[$m[1]]; unset($exptks[0]);
if (method_exists($this, "_replcb_".$node[1])){ $val = $this->_get_var($varn, true);
$s = call_user_func(array($this, "_replcb_".$node[1]), $node); if ($val != KEY_NOT_EXISTS) {
} else { /* run filters */
$s = ""; /*
} * Filter are in form of:
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s); * filtername:arg:arg:arg
return $s; *
} * "filtername" is function name
* "arg"s are optional, var value is appended to the end
private function _replcb($m){ * if one "arg"==='x' , is replaced with var value
//var_dump(array_map('htmlspecialchars', $m)); *
$this->done = false; * examples:
$this->nodes[] = (array) $m; * $item.body|htmlspecialchars // escape html chars
return "||". (count($this->nodes)-1) ."||"; * $item.body|htmlspecialchars|strtoupper // escape html and uppercase result
} * $item.created|date:%Y %M %j // format date (created is a timestamp)
* $item.body|str_replace:cat:dog // replace all "cat" with "dog"
private function _build_nodes($s){ * $item.body|str_replace:cat:dog:x:1 // replace one "cat" with "dog"
$this->done = false;
while (!$this->done){ */
$this->done=true; foreach ($exptks as $filterstr) {
$s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s); $filter = explode(":", $filterstr);
if ($s==Null) $this->_preg_error(); $filtername = $filter[0];
} unset($filter[0]);
//({{ *else *}}[^{]*)? $valkey = array_search("x", $filter);
krsort($this->nodes); if ($valkey === false) {
return $s; $filter[] = $val;
} } else {
$filter[$valkey] = $val;
}
private function var_replace($s){ if (function_exists($filtername)) {
$m = array(); $val = call_user_func_array($filtername, $filter);
/** regexp: }
* \$ literal $ }
* (\[)? optional open square bracket $s = str_replace($var, $val, $s);
* ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional
* dot, repeated at least 1 time
* (?(1)\]) 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){
$varn = str_replace(array("[","]"), array("",""), $var);
$val = $this->_get_var($varn, true);
if ($val!=KEY_NOT_EXISTS)
$s = str_replace($var, $val, $s);
} }
} }
return $s;
} }
public function replace($s, $r) {
$this->r = $r;
$s = $this->_build_nodes($s);
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s); return $s;
if ($s==Null) $this->_preg_error();
// remove comments block
$s = preg_replace('/{#[^#]*#}/', "" , $s);
// 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;
}
} }
$t = new Template;
public function replace($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);
// 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;
}
}
$t = new Template;
function template_escape($s) { function template_escape($s) {
return str_replace(array('$','{{'),array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),$s); return str_replace(array('$', '{{'), array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), $s);
} }
function template_unescape($s) { function template_unescape($s) {
return str_replace(array('!_Doll^Ars1Az_!','!_DoubLe^BraceS4Rw_!'),array('$','{{'),$s); return str_replace(array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), array('$', '{{'), $s);
} }