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<?php
// vim: set expandtab tabstop=4 shiftwidth=4:
// This code that was derived from the original PHPLIB Template class
// is copyright by Kristian Koehntopp, NetUSE AG and was released
// under the LGPL.
//
// Authors: Kristian Koehntopp <kris@koehntopp.de> (original from PHPLIB)
// Bjoern Schotte <bjoern@rent-a-phpwizard.de> (PEARification)
// Martin Jansen <mj@php.net> (PEAR conformance)
//
// $Id: PHPLIB.php,v 1.14 2003/06/11 06:03:32 bjoern Exp $
//
require_once "PEAR.php";
/**
* Converted PHPLIB Template class
*
* For those who want to use PHPLIB's fine template class,
* here's a PEAR conforming class with the original PHPLIB
* template code from phplib-stable CVS. Original author
* was Kristian Koehntopp <kris@koehntopp.de>
*
* @author Bjoern Schotte <bjoern@rent-a-phpwizard.de>
* @author Martin Jansen <mj@php.net> (PEAR conformance)
* @version 1.0
*/
class Template_PHPLIB
{
/**
* If set, echo assignments
* @var bool
*/
var $debug = false;
/**
* $file[handle] = "filename";
* @var array
*/
var $file = array();
/**
* fallback paths that should be defined in a child class
* @var array
*/
var $file_fallbacks = array();
/**
* Relative filenames are relative to this pathname
* @var string
*/
var $root = "";
/*
* $_varKeys[key] = "key"
* @var array
*/
var $_varKeys = array();
/**
* $_varVals[key] = "value";
* @var array
*/
var $_varVals = array();
/**
* "remove" => remove undefined variables
* "comment" => replace undefined variables with comments
* "keep" => keep undefined variables
* @var string
*/
var $unknowns = "remove";
/**
* "yes" => halt, "report" => report error, continue, "no" => ignore error quietly
* @var string
*/
var $haltOnError = "report";
/**
* The last error message is retained here
* @var string
* @see halt
*/
var $_lastError = "";
/**
* Constructor
*
* @access public
* @param string template root directory
* @param string how to handle unknown variables
* @param array fallback paths
*/
function Template_PHPLIB($root = ".", $unknowns = "remove", $fallback="")
{
$this->setRoot($root);
$this->setUnknowns($unknowns);
if (is_array($fallback)) $this->file_fallbacks = $fallback;
}
/**
* Sets the template directory
*
* @access public
* @param string new template directory
* @return bool
*/
function setRoot($root)
{
if (!is_dir($root)) {
$this->halt("setRoot: $root is not a directory.");
return false;
}
$this->root = $root;
return true;
}
/**
* What to do with unknown variables
*
* three possible values:
*
* - "remove" will remove unknown variables
* (don't use this if you define CSS in your page)
* - "comment" will replace undefined variables with comments
* - "keep" will keep undefined variables as-is
*
* @access public
* @param string unknowns
*/
function setUnknowns($unknowns = "keep")
{
$this->unknowns = $unknowns;
}
/**
* Set appropriate template files
*
* With this method you set the template files you want to use.
* Either you supply an associative array with key/value pairs
* where the key is the handle for the filname and the value
* is the filename itself, or you define $handle as the file name
* handle and $filename as the filename if you want to define only
* one template.
*
* @access public
* @param mixed handle for a filename or array with handle/name value pairs
* @param string name of template file
* @return bool
*/
function setFile($handle, $filename = "")
{
if (!is_array($handle)) {
if ($filename == "") {
$this->halt("setFile: For handle $handle filename is empty.");
return false;
}
$this->file[$handle] = $this->_filename($filename);
} else {
reset($handle);
while (list($h, $f) = each($handle)) {
$this->file[$h] = $this->_filename($f);
}
}
}
/**
* Set a block in the appropriate template handle
*
* By setting a block like that:
*
* <!-- BEGIN blockname -->
* html code
* <!-- END blockname -->
*
* you can easily do repeating HTML code, i.e. output
* database data nice formatted into a HTML table where
* each DB row is placed into a HTML table row which is
* defined in this block.
* It extracts the template $handle from $parent and places
* variable {$name} instead.
*
* @access public
* @param string parent handle
* @param string block name handle
* @param string variable substitution name
*/
function setBlock($parent, $handle, $name = "")
{
if (!$this->_loadFile($parent)) {
$this->halt("setBlock: unable to load $parent.");
return false;
}
if ($name == "") {
$name = $handle;
}
$str = $this->getVar($parent);
$reg = "/[ \t]*<!--\s+BEGIN $handle\s+-->\s*?\n?(\s*.*?\n?)\s*<!--\s+END $handle\s+-->\s*?\n?/sm";
preg_match_all($reg, $str, $m);
$str = preg_replace($reg, "{" . "$name}", $str);
if (isset($m[1][0])) $this->setVar($handle, $m[1][0]);
$this->setVar($parent, $str);
}
/**
* Set corresponding substitutions for placeholders
*
* @access public
* @param string name of a variable that is to be defined or an array of variables with value substitution as key/value pairs
* @param string value of that variable
* @param boolean if true, the value is appended to the variable's existing value
*/
function setVar($varname, $value = "", $append = false)
{
if (!is_array($varname)) {
if (!empty($varname))
if ($this->debug) print "scalar: set *$varname* to *$value*<br>\n";
$this->_varKeys[$varname] = $this->_varname($varname);
($append) ? $this->_varVals[$varname] .= $value : $this->_varVals[$varname] = $value;
} else {
reset($varname);
while (list($k, $v) = each($varname)) {
if (!empty($k))
if ($this->debug) print "array: set *$k* to *$v*<br>\n";
$this->_varKeys[$k] = $this->_varname($k);
($append) ? $this->_varVals[$k] .= $v : $this->_varVals[$k] = $v;
}
}
}
/**
* Substitute variables in handle $handle
*
* @access public
* @param string name of handle
* @return mixed string substituted content of handle
*/
function subst($handle)
{
if (!$this->_loadFile($handle)) {
$this->halt("subst: unable to load $handle.");
return false;
}
return @str_replace($this->_varKeys, $this->_varVals, $this->getVar($handle));
}
/**
* Same as subst but printing the result
*
* @access public
* @brother subst
* @param string handle of template
* @return bool always false
*/
function pSubst($handle)
{
print $this->subst($handle);
return false;
}
/**
* Parse handle into target
*
* Parses handle $handle into $target, eventually
* appending handle at $target if $append is defined
* as TRUE.
*
* @access public
* @param string target handle to parse into
* @param string which handle should be parsed
* @param boolean append it to $target or not?
* @return string parsed handle
*/
function parse($target, $handle, $append = false)
{
if (!is_array($handle)) {
$str = $this->subst($handle);
($append) ? $this->setVar($target, $this->getVar($target) . $str) : $this->setVar($target, $str);
} else {
reset($handle);
while (list(, $h) = each($handle)) {
$str = $this->subst($h);
$this->setVar($target, $str);
}
}
return $str;
}
/**
* Same as parse, but printing it.
*
* @access public
* @brother parse
* @param string target to parse into
* @param string handle which should be parsed
* @param should $handle be appended to $target?
* @return bool
*/
function pParse($target, $handle, $append = false)
{
print $this->finish($this->parse($target, $handle, $append));
return false;
}
/**
* Return all defined variables and their values
*
* @access public
* @return array with all defined variables and their values
*/
function getVars()
{
reset($this->_varKeys);
while (list($k, ) = each($this->_varKeys)) {
$result[$k] = $this->getVar($k);
}
return $result;
}
/**
* Return one or more specific variable(s) with their values.
*
* @access public
* @param mixed array with variable names or one variable name as a string
* @return mixed array of variable names with their values or value of one specific variable
*/
function getVar($varname)
{
if (!is_array($varname)) {
if (isset($this->_varVals[$varname])) {
return $this->_varVals[$varname];
} else {
return "";
}
} else {
reset($varname);
while (list($k, ) = each($varname)) {
$result[$k] = (isset($this->_varVals[$k])) ? $this->_varVals[$k] : "";
}
return $result;
}
}
/**
* Get undefined values of a handle
*
* @access public
* @param string handle name
* @return mixed false if an error occured or the undefined values
*/
function getUndefined($handle)
{
if (!$this->_loadFile($handle)) {
$this->halt("getUndefined: unable to load $handle.");
return false;
}
preg_match_all("/{([^ \t\r\n}]+)}/", $this->getVar($handle), $m);
$m = $m[1];
if (!is_array($m)) {
return false;
}
reset($m);
while (list(, $v) = each($m)) {
if (!isset($this->_varKeys[$v])) {
$result[$v] = $v;
}
}
if (isset($result) && count($result)) {
return $result;
} else {
return false;
}
}
/**
* Finish string
*
* @access public
* @param string string to finish
* @return finished, i.e. substituted string
*/
function finish($str)
{
switch ($this->unknowns) {
case "remove":
$str = preg_replace('/{[^ \t\r\n}]+}/', "", $str);
break;
case "comment":
$str = preg_replace('/{([^ \t\r\n}]+)}/', "<!-- Template $handle: Variable \\1 undefined -->", $str);
break;
}
return $str;
}
/**
* Print variable to the browser
*
* @access public
* @param string name of variable to print
*/
function p($varname)
{
print $this->finish($this->getVar($varname));
}
/**
* Get finished variable
*
* @access public public
* @param string variable to get
* @return string string with finished variable
*/
function get($varname)
{
return $this->finish($this->getVar($varname));
}
/**
* Complete filename
*
* Complete filename, i.e. testing it for slashes
*
* @access private
* @param string filename to be completed
* @return string completed filename
*/
function _filename($filename)
{
if (substr($filename, 0, 1) != "/") {
$filename = $this->root."/".$filename;
}
if (file_exists($filename)) return $filename;
if (is_array($this->file_fallbacks) && count($this->file_fallbacks) > 0) {
reset($this->file_fallbacks);
while (list(,$v) = each($this->file_fallbacks)) {
if (file_exists($v.basename($filename))) return $v.basename($filename);
}
$this->halt(sprintf("filename: file %s does not exist in the fallback paths %s.",$filename,implode(",",$this->file_fallbacks)));
return false;
} else {
$this->halt(sprintf("filename: file %s does not exist.",$filename));
return false;
}
return $filename;
}
/**
* Protect a replacement variable
*
* @access private
* @param string name of replacement variable
* @return string replaced variable
*/
function _varname($varname)
{
return "{".$varname."}";
}
/**
* load file defined by handle if it is not loaded yet
*
* @access private
* @param string handle
* @return bool FALSE if error, true if all is ok
*/
function _loadFile($handle)
{
if (isset($this->_varKeys[$handle]) and !empty($this->_varVals[$handle])) {
return true;
}
if (!isset($this->file[$handle])) {
$this->halt("loadfile: $handle is not a valid handle.");
return false;
}
$filename = $this->file[$handle];
if (function_exists("file_get_contents")) {
$str = file_get_contents($filename);
} else {
if (!$fp = @fopen($filename,"r")) {
$this->halt("loadfile: couldn't open $filename");
return false;
}
$str = fread($fp,filesize($filename));
fclose($fp);
}
if ($str=='') {
$this->halt("loadfile: While loading $handle, $filename does not exist or is empty.");
return false;
}
$this->setVar($handle, $str);
return true;
}
/**
* Error function. Halt template system with message to show
*
* @access public
* @param string message to show
* @return bool
*/
function halt($msg)
{
$this->_lastError = $msg;
if ($this->haltOnError != "no") {
return $this->haltMsg($msg);
}
return false;
}
/**
* printf error message to show
*
* @access public
* @param string message to show
* @return object PEAR error object
*/
function haltMsg($msg)
{
PEAR::raiseError(sprintf("<b>Template Error:</b> %s<br>\n", $msg));
}
}
?>
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