<?php namespace Zotlabs\Render; define ("KEY_NOT_EXISTS", '^R_key_not_Exists^'); class SimpleTemplate implements TemplateEngine { 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); }