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https://github.com/friendica/friendica
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Merge pull request #543 from fabrixxm/master
template_processor: add filter support to variables
This commit is contained in:
friendica
commit
ca16302111
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@ -1,7 +1,9 @@
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<?php
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define("KEY_NOT_EXISTS", '^R_key_not_Exists^');
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class Template {
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var $r;
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var $search;
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var $replace;
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@ -15,10 +17,14 @@
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private function _preg_error() {
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switch (preg_last_error()) {
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case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break;
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case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break;
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case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break;
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case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break;
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case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR');
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break;
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case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR');
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break;
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case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR');
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break;
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case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR');
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break;
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// This is only valid for php > 5.3, not certain how to code around it for unit tests
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// case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break;
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default:
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@ -30,18 +36,18 @@
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die();
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}
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private function _push_stack() {
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$this->stack[] = array($this->r, $this->nodes);
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}
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private function _pop_stack() {
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list($this->r, $this->nodes) = array_pop($this->stack);
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}
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private function _get_var($name, $retNoKey = false) {
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$keys = array_map('trim', explode(".", $name));
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if ($retNoKey && !array_key_exists($keys[0], $this->r)) return KEY_NOT_EXISTS;
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if ($retNoKey && !array_key_exists($keys[0], $this->r))
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return KEY_NOT_EXISTS;
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$val = $this->r;
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foreach ($keys as $k) {
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$val = (isset($val[$k]) ? $val[$k] : null);
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@ -60,12 +66,14 @@
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if (strpos($args[2], "==") > 0) {
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list($a, $b) = array_map("trim", explode("==", $args[2]));
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$a = $this->_get_var($a);
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if ($b[0]=="$") $b = $this->_get_var($b);
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if ($b[0] == "$")
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$b = $this->_get_var($b);
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$val = ($a == $b);
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} else if (strpos($args[2], "!=") > 0) {
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list($a, $b) = array_map("trim", explode("!=", $args[2]));
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$a = $this->_get_var($a);
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if ($b[0]=="$") $b = $this->_get_var($b);
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if ($b[0] == "$")
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$b = $this->_get_var($b);
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$val = ($a != $b);
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} else {
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$val = $this->_get_var($args[2]);
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@ -89,16 +97,19 @@
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} else {
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list($keyname, $varname) = $x;
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}
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if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
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if ($m[0] == "" || $varname == "" || is_null($varname))
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die("template error: 'for " . $m[0] . " as " . $varname . "'");
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//$vals = $this->r[$m[0]];
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$vals = $this->_get_var($m[0]);
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$ret = "";
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if (!is_array($vals)) return $ret;
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if (!is_array($vals))
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return $ret;
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foreach ($vals as $k => $v) {
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$this->_push_stack();
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$r = $this->r;
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$r[$varname] = $v;
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if ($keyname!='') $r[$keyname] = (($k === 0) ? '0' : $k);
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if ($keyname != '')
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$r[$keyname] = (($k === 0) ? '0' : $k);
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$ret .= $this->replace($args[3], $r);
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$this->_pop_stack();
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}
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@ -118,7 +129,8 @@
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$newctx = null;
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}
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if ($tplfile[0]=="$") $tplfile = $this->_get_var($tplfile);
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if ($tplfile[0] == "$")
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$tplfile = $this->_get_var($tplfile);
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$this->_push_stack();
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$r = $this->r;
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@ -131,7 +143,6 @@
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$ret = $this->replace($tpl, $r);
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$this->_pop_stack();
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return $ret;
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}
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/**
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@ -177,14 +188,14 @@
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while (!$this->done) {
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$this->done = true;
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$s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s);
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if ($s==Null) $this->_preg_error();
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if ($s == Null)
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$this->_preg_error();
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}
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//({{ *else *}}[^{]*)?
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krsort($this->nodes);
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return $s;
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}
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private function var_replace($s) {
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$m = array();
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/** regexp:
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@ -192,18 +203,55 @@
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* (\[)? optional open square bracket
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* ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional
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* dot, repeated at least 1 time
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* (|[a-zA-Z0-9-_:]+)* pipe followed by filter name and args, zero or many
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* (?(1)\]) if there was opened square bracket
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* (subgrup 1), match close bracket
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*/
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if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(?(1)\])/', $s,$m)){
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if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(\|[a-zA-Z0-9-_:]+)*(?(1)\])/', $s, $m)) {
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foreach ($m[0] as $var) {
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$varn = str_replace(array("[","]"), array("",""), $var);
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$exp = str_replace(array("[", "]"), array("", ""), $var);
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$exptks = explode("|", $exp);
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$varn = $exptks[0];
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unset($exptks[0]);
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$val = $this->_get_var($varn, true);
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if ($val!=KEY_NOT_EXISTS)
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if ($val != KEY_NOT_EXISTS) {
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/* run filters */
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/*
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* Filter are in form of:
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* filtername:arg:arg:arg
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*
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* "filtername" is function name
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* "arg"s are optional, var value is appended to the end
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* if one "arg"==='x' , is replaced with var value
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*
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* examples:
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* $item.body|htmlspecialchars // escape html chars
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* $item.body|htmlspecialchars|strtoupper // escape html and uppercase result
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* $item.created|date:%Y %M %j // format date (created is a timestamp)
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* $item.body|str_replace:cat:dog // replace all "cat" with "dog"
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* $item.body|str_replace:cat:dog:x:1 // replace one "cat" with "dog"
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*/
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foreach ($exptks as $filterstr) {
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$filter = explode(":", $filterstr);
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$filtername = $filter[0];
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unset($filter[0]);
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$valkey = array_search("x", $filter);
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if ($valkey === false) {
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$filter[] = $val;
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} else {
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$filter[$valkey] = $val;
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}
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if (function_exists($filtername)) {
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$val = call_user_func_array($filtername, $filter);
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}
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}
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$s = str_replace($var, $val, $s);
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}
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}
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}
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return $s;
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}
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@ -214,37 +262,34 @@
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$s = $this->_build_nodes($s);
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$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
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if ($s==Null) $this->_preg_error();
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if ($s == Null)
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$this->_preg_error();
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// remove comments block
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$s = preg_replace('/{#[^#]*#}/', "", $s);
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// replace strings recursively (limit to 10 loops)
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$os = ""; $count=0;
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$os = "";
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$count = 0;
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while ($os != $s && $count < 10) {
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$os=$s; $count++;
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$os = $s;
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$count++;
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$s = $this->var_replace($s);
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}
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return $s;
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}
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}
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$t = new Template;
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function template_escape($s) {
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return str_replace(array('$', '{{'), array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), $s);
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}
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function template_unescape($s) {
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return str_replace(array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), array('$', '{{'), $s);
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}
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