egroupware_official/phpgwapi/inc/class.template.inc.php

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<?php
/**************************************************************************\
* phpGroupWare API - Template class *
* (C) Copyright 2001 Ben Woodhead ben@echo-chn.net *
* ------------------------------------------------------------------------ *
* This is not part of phpGroupWare, but is used by phpGroupWare. *
* http://www.phpgroupware.org/ *
* ------------------------------------------------------------------------ *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* any later version. *
\**************************************************************************/
/**
* HTML template parser
* Ben Woodhead
* ben@echo-chn.net
* LGPL
* @package cPage
*/
class template {
/** Internal Use - Array of file names */
var $m_file = array();
/** Internal Use - Array of block names*/
var $m_block = array();
/** Internal Use */
var $m_varkeys = array();
/** Internal Use */
var $m_varvals = array();
/** Internal Use - Path definition */
var $m_root = array();
/** Internal Use - Defines what to do with unknown tags
* @param keep, remove, or comment
*/
var $m_unknowns = "";
/** Internal Use - class error instance */
var $c_error = "";
/** Default constructor
* @param path - Path to were templates are located (default in preferences)
* @param unknown - Defines what to do with unknown tags (default in preferences)
*/
function template($root="", $unknowns="") {
global $preferences;
$this->c_error = createObject("cError","1");
$this->c_error->setFile(__FILE__);
if (!empty($root)) {
$this->setRoot($root);
}
else {
$this->setRoot($preferences["template"]["path"]);
}
if (!empty($unknowns)) {
$this->setUnknowns($unknowns);
} else {
$this->setUnknowns($preferences["template"]["unknowns"]);
}
}
/** Set the path to templates
* @param path - Path to were templates are located
* @returns returns false if an error has occured
*/
function setRoot($root) {
if (!is_array($root)) {
if (!is_dir($root)) {
$this->c_error->halt("setRoot (scalar): $root is not a directory.",0,__LINE__);
return false;
}
$this->m_root[] = $root;
} else {
reset($root);
while(list($k, $v) = each($root)) {
if (!is_dir($v)) {
$this->c_error->halt("setRoot (array): $v (entry $k of root) is not a directory.",0,__LINE__);
return false;
}
$this->m_root[] = $v;
}
}
return true;
}
/** Sets what to do with unknown tags
* @param unknown - Path to were templates are located
* @notes keep - displays the unknown tags
* @notes remove - removes unknown tags
* @returns returns false if an error has occured
*/
function setUnknowns($unknowns = "") {
$this->m_unknowns = $unknowns;
}
/** Sets name of template file
* @blockname - alias for the block
* @filename - filename of block
* @notes Must be passed in as array
* @returns returns false if an error has occured
*/
function setFile($varname, $filename = "") {
if (!is_array($varname)) {
if ($filename == "") {
$c_error->halt("set_file: For varname $varname filename is empty.",0,__LINE__);
return false;
}
$this->m_file[$varname] = $this->fileName($filename);
} else {
reset($varname);
while(list($h, $f) = each($varname)) {
if ($f == "") {
$this->c_error->halt("set_file: For varname $h filename is empty.",0,__LINE__);
return false;
}
$this->m_file[$h] = $this->fileName($f);
}
}
return true;
}
/** Defines what block to use in template
* @param parent - is the block alias
* @param block - will look for this name in template file
* @param name - alias for block (defaults to block name)
* @notes Also can be used to define nested blocks
* @returns Currently returns true
*/
function setBlock($parent, $varname, $name = "") {
if ($name == "") {
$name = $varname;
}
$this->m_block[$varname]["parent"] = $parent;
$this->m_block[$varname]["alias"] = $name;
return true;
}
/** Sets the tags in template
* @param Tag name found in template file
* @param Value that will be included when parsing complete
* @return No return
*/
function setVar($varname, $value = "") {
if (!is_array($varname)) {
if (!empty($varname)) {
$this->m_varkeys[$varname] = "/".$this->varName($varname)."/";
$this->m_varvals[$varname] = $value;
}
} else {
reset($varname);
while(list($k, $v) = each($varname)) {
if (!empty($k)) {
$this->m_varkeys[$k] = "/".$this->varName($k)."/";
$this->m_varvals[$k] = $v;
}
}
}
}
/** Substitute text in templates
* @param Tag name found in template file
* @return processed string
* @notes Internal Use
*/
function subst($varname) {
$str = $this->getVar($varname);
$str = @preg_replace($this->m_varkeys, $this->m_varvals, $str);
return $str;
}
/** Substitute text in templates and prints
* @param Tag name found in template file
* @notes Internal Use
*/
function psubst($varname) {
print $this->subst($varname);
return false;
}
/** Parse complete template
* @param Target - Alias for processed text
* @param Block - Name of block to process
* @param Append - Should text be append to file (defaults no false)
* @return processed string
*/
function parse($target, $varname, $append = false) {
if (!is_array($varname)) {
$str = $this->subst($varname);
if ($append) {
$this->setVar($target, $this->getVar($target) . $str);
} else {
$this->setVar($target, $str);
}
} else {
reset($varname);
while(list($i, $h) = each($varname)) {
$str = $this->subst($h);
$this->setVar($target, $str);
}
}
return $str;
}
/** Parse complete template and print results
* @param Target - Alias for processed text
* @param Block - Name of block to process
* @param Append - Should text be append to file (defaults no false)
*/
function pparse($target, $varname, $append = false) {
print $this->parse($target, $varname, $append);
return false;
}
/** Gets the tags from the array
* @notes Internal use
*/
function getVars() {
reset($this->m_varkeys);
while(list($k, $v) = each($this->m_varkeys)) {
$result[$k] = $this->getVar($k);
}
return $result;
}
/** Gets the tags from the single input
* @notes Internal use
* @returns Result array
*/
function getVar($varname) {
if (!is_array($varname)) {
if (!isset($this->m_varkeys[$varname]) or empty($this->m_varvals[$varname])) {
if (isset($this->m_file[$varname])) {
$this->loadFile($varname);
}
if (isset($this->m_block[$varname])) {
$this->implodeBlock($varname);
}
}
return(isset($this->m_varvals[$varname]) ? $this->m_varvals[$varname] : "");
} else {
reset($varname);
while(list($k, $v) = each($varname)) {
if (!isset($this->m_varkeys[$varname]) or empty($this->m_varvals[$varname])) {
if ($this->m_file[$v]) {
$this->loadFile($v);
}
if ($this->m_block[$v]) {
$this->implodeBlock($v);
}
}
$result[$v] = $this->m_varvals[$v];
}
return $result;
}
}
/** Gets undefined
* @notes Internal Use
*/
function getUndefined($varname) {
$str = $this->getVar($varname);
preg_match_all("/\\{([a-zA-Z0-9_]+)\\}/", $str, $m);
$m = $m[1];
if (!is_array($m)) {
return false;
}
reset($m);
while(list($k, $v) = each($m)) {
if (!isset($this->m_varkeys[$v]))
$result[$v] = $v;
}
if (count($result)) {
return $result;
}
else {
return false;
}
}
/** Decided what to do with unknown tags
* @notes Internal use
* @returns Processed string
*/
function finish($str) {
switch ($this->m_unknowns) {
case "keep":
break;
case "remove":
$str = preg_replace("/{[^ \t\r\n}]+}/", "", $str);
break;
case "comment":
$str = preg_replace("/{[^ \t\r\n}]+}/", "<!-- Template $varname: Variable \\1 undefined -->", $str);
break;
}
return $str;
}
/** Print out template
* @param Alias to processed template
*/
function p($varname) {
print $this->finish($this->getVar($varname));
}
/** Gets results for finished
* @notes Internal use
* @returns processed tabs from finished
*/
function get($varname) {
return $this->finish($this->getVar($varname));
}
/** Remove unwanted characters from filename
* @notes Internal use
* @returns Returns file name if not error has occured
*/
function fileName($filename) {
if (substr($filename, 0, 1) == "/" || preg_match("/[a-z]{1}:/i",$fileName) ) {
if (file_exists($filename)) {
return $filename;
}
else {
$this->c_error->halt("filename (absolute): $filename does not exist.",0,__LINE__);
return false;
}
}
reset($this->m_root);
while(list($k, $v) = each($this->m_root)) {
$f = "$v/$filename";
if (file_exists($f)) {
return $f;
}
}
$this->c_error->halt("filename (relative): file $filename does not exist.",0,__LINE__);
return false;
}
/** Removed unwanted characters for block name
* @notes Internal use
* @returns Block name
*/
function varName($m_varname) {
return preg_quote("{".$m_varname."}");
}
/** Open the files
* @notes Internal use
* @returns Processed string
*/
function loadFile($varname) {
if (!isset($this->m_file[$varname])) {
$this->c_error->halt("loadfile: $varname is not a valid varname.",0,__LINE__);
return false;
}
$filename = $this->fileName($this->m_file[$varname]);
$str = implode("", @file($filename));
if (empty($str)) {
$this->c_error->halt("loadfile: While loading $varname, $filename does not exist or is empty.",0,__LINE__);
return false;
}
$this->setVar($varname, $str);
return true;
}
/** Implode Blocks
* @notes Internal use
*/
function implodeBlock($varname) {
$parent = $this->m_block[$varname]["parent"];
$alias = $this->m_block[$varname]["alias"];
$str = $this->getVar($parent);
$reg = "/<!--\\s+BEGIN $varname\\s+-->(.*)\n\s*<!--\\s+END $varname\\s+-->/sm";
if (!preg_match_all($reg, $str, $m))
{
$this->c_error->halt("implodeBlock - no match for $varname variable",0,__LINE__);
}
else
{
$str = preg_replace($reg, "{"."$alias}", $str);
$this->setVar($varname, $m[1][0]);
$this->setVar($parent, $str);
}
}
}
?>