mirror of
https://github.com/EGroupware/egroupware.git
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347 lines
8.7 KiB
PHP
347 lines
8.7 KiB
PHP
<?php
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/*
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* Session Management for PHP3
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*
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* (C) Copyright 1999-2000 NetUSE GmbH
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* Kristian Koehntopp
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*
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* $Id$
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*
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*/
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class Template {
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var $classname = "Template";
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/* if set, echo assignments */
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var $debug = false;
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/* $file[handle] = "filename"; */
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var $file = array();
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/* relative filenames are relative to this pathname */
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var $root = "";
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/* $varkeys[key] = "key"; $varvals[key] = "value"; */
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var $varkeys = array();
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var $varvals = array();
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/* "remove" => remove undefined variables
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* "comment" => replace undefined variables with comments
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* "keep" => keep undefined variables
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*/
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var $unknowns = "remove";
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/* "yes" => halt, "report" => report error, continue, "no" => ignore error quietly */
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var $halt_on_error = "yes";
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/* last error message is retained here */
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var $last_error = "";
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/***************************************************************************/
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/* public: Constructor.
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* root: template directory.
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* unknowns: how to handle unknown variables.
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*/
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function Template($root = ".", $unknowns = "remove") {
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$this->set_root($root);
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$this->set_unknowns($unknowns);
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}
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/* public: setroot(pathname $root)
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* root: new template directory.
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*/
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function set_root($root) {
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if (!is_dir($root)) {
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$this->halt("set_root: $root is not a directory.");
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return false;
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}
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$this->root = $root;
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return true;
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}
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/* public: set_unknowns(enum $unknowns)
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* unknowns: "remove", "comment", "keep"
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*
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*/
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function set_unknowns($unknowns = "keep") {
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$this->unknowns = $unknowns;
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}
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/* public: set_file(array $filelist)
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* filelist: array of handle, filename pairs.
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*
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* public: set_file(string $handle, string $filename)
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* handle: handle for a filename,
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* filename: name of template file
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*/
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function set_file($handle, $filename = "") {
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if (!is_array($handle)) {
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if ($filename == "") {
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$this->halt("set_file: For handle $handle filename is empty.");
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return false;
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}
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$this->file[$handle] = $this->filename($filename);
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} else {
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reset($handle);
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while(list($h, $f) = each($handle)) {
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$this->file[$h] = $this->filename($f);
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}
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}
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}
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/* public: set_block(string $parent, string $handle, string $name = "")
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* extract the template $handle from $parent,
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* place variable {$name} instead.
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*/
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function set_block($parent, $handle, $name = "") {
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if (!$this->loadfile($parent)) {
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$this->halt("subst: unable to load $parent.");
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return false;
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}
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if ($name == "")
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$name = $handle;
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$str = $this->get_var($parent);
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$reg = "/<!--\s+BEGIN $handle\s+-->(.*)\n\s*<!--\s+END $handle\s+-->/sm";
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preg_match_all($reg, $str, $m);
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$str = preg_replace($reg, "{" . "$name}", $str);
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$this->set_var($handle, $m[1][0]);
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$this->set_var($parent, $str);
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}
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/* public: set_var(array $values)
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* values: array of variable name, value pairs.
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*
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* public: set_var(string $varname, string $value)
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* varname: name of a variable that is to be defined
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* value: value of that variable
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*/
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function set_var($varname, $value = "") {
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if (!is_array($varname)) {
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if (!empty($varname))
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if ($this->debug) print "scalar: set *$varname* to *$value*<br>\n";
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$this->varkeys[$varname] = "/".$this->varname($varname)."/";
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$this->varvals[$varname] = $value;
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} else {
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reset($varname);
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while(list($k, $v) = each($varname)) {
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if (!empty($k))
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if ($this->debug) print "array: set *$k* to *$v*<br>\n";
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$this->varkeys[$k] = "/".$this->varname($k)."/";
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$this->varvals[$k] = $v;
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}
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}
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}
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/* public: subst(string $handle)
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* handle: handle of template where variables are to be substituted.
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*/
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function subst($handle) {
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if (!$this->loadfile($handle)) {
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$this->halt("subst: unable to load $handle.");
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return false;
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}
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$str = $this->get_var($handle);
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$str = @preg_replace($this->varkeys, $this->varvals, $str);
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return $str;
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}
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/* public: psubst(string $handle)
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* handle: handle of template where variables are to be substituted.
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*/
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function psubst($handle) {
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print $this->subst($handle);
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return false;
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}
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/* public: parse(string $target, string $handle, boolean append)
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* public: parse(string $target, array $handle, boolean append)
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* target: handle of variable to generate
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* handle: handle of template to substitute
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* append: append to target handle
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*/
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function parse($target, $handle, $append = false) {
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if (!is_array($handle)) {
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$str = $this->subst($handle);
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if ($append) {
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$this->set_var($target, $this->get_var($target) . $str);
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} else {
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$this->set_var($target, $str);
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}
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} else {
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reset($handle);
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while(list($i, $h) = each($handle)) {
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$str = $this->subst($h);
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$this->set_var($target, $str);
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}
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}
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return $str;
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}
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function pparse($target, $handle, $append = false) {
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print $this->parse($target, $handle, $append);
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return false;
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}
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/* public: get_vars()
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*/
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function get_vars() {
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reset($this->varkeys);
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while(list($k, $v) = each($this->varkeys)) {
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$result[$k] = $this->varvals[$k];
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}
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return $result;
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}
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/* public: get_var(string varname)
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* varname: name of variable.
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*
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* public: get_var(array varname)
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* varname: array of variable names
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*/
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function get_var($varname) {
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if (!is_array($varname)) {
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return $this->varvals[$varname];
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} else {
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reset($varname);
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while(list($k, $v) = each($varname)) {
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$result[$k] = $this->varvals[$k];
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}
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return $result;
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}
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}
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/* public: get_undefined($handle)
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* handle: handle of a template.
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*/
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function get_undefined($handle) {
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if (!$this->loadfile($handle)) {
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$this->halt("get_undefined: unable to load $handle.");
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return false;
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}
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preg_match_all("/\{([^}]+)\}/", $this->get_var($handle), $m);
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$m = $m[1];
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if (!is_array($m))
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return false;
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reset($m);
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while(list($k, $v) = each($m)) {
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if (!isset($this->varkeys[$v]))
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$result[$v] = $v;
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}
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if (count($result))
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return $result;
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else
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return false;
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}
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/* public: finish(string $str)
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* str: string to finish.
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*/
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function finish($str) {
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switch ($this->unknowns) {
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case "keep":
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break;
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case "remove":
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$str = preg_replace('/{[^ \t\r\n}]+}/', "", $str);
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break;
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case "comment":
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$str = preg_replace('/{([^ \t\r\n}]+)}/', "<!-- Template $handle: Variable \\1 undefined -->", $str);
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break;
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}
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return $str;
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}
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/* public: p(string $varname)
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* varname: name of variable to print.
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*/
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function p($varname) {
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print $this->finish($this->get_var($varname));
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}
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function get($varname) {
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return $this->finish($this->get_var($varname));
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}
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/***************************************************************************/
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/* private: filename($filename)
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* filename: name to be completed.
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*/
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function filename($filename) {
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if (substr($filename, 0, 1) != "/") {
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$filename = $this->root."/".$filename;
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}
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if (!file_exists($filename))
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$this->halt("filename: file $filename does not exist.");
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return $filename;
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}
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/* private: varname($varname)
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* varname: name of a replacement variable to be protected.
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*/
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function varname($varname) {
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return preg_quote("{".$varname."}");
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}
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/* private: loadfile(string $handle)
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* handle: load file defined by handle, if it is not loaded yet.
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*/
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function loadfile($handle) {
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if (isset($this->varkeys[$handle]) and !empty($this->varvals[$handle]))
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return true;
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if (!isset($this->file[$handle])) {
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$this->halt("loadfile: $handle is not a valid handle.");
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return false;
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}
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$filename = $this->file[$handle];
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$str = implode("", @file($filename));
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if (empty($str)) {
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$this->halt("loadfile: While loading $handle, $filename does not exist or is empty.");
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return false;
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}
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$this->set_var($handle, $str);
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return true;
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}
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/***************************************************************************/
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/* public: halt(string $msg)
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* msg: error message to show.
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*/
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function halt($msg) {
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$this->last_error = $msg;
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if ($this->halt_on_error != "no")
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$this->haltmsg($msg);
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if ($this->halt_on_error == "yes")
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die("<b>Halted.</b>");
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return false;
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}
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/* public, override: haltmsg($msg)
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* msg: error message to show.
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*/
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function haltmsg($msg) {
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printf("<b>Template Error:</b> %s<br>\n", $msg);
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}
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}
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