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<?php
class TagHandler {
/*
* Denied tags -- used to be able to process
* all this in two passes (eg: used for tags needing information for other stuff)
*/
private static $deniedtags = Array();
/*
* UBB tag configuration params
*/
public static $tagconfig =
Array(
/* ------- b -------------------- */
'b' =>
Array('b' =>
Array('closetags' => Array('b'),
'allowedchildren' => Array(NULL),
'handler' => Array('TagHandler', 'handle_bold') ),
'br' =>
Array('closetags' => Array(NULL),
'allowedchildren' => Array(''),
'handler' => Array('TagHandler', 'handle_br') )
),
/* ------- i -------------------- */
'i' =>
Array('i' =>
Array('closetags' => Array('i'),
'allowedchildren' => Array(NULL),
'handler' => Array('TagHandler', 'handle_italic') ),
'img' =>
Array('closetags' => Array(NULL),
'allowedchildren' => Array(''),
'handler' => Array('TagHandler', 'handle_img') )
),
/* ------- u ------------------- */
'u' =>
Array('u' =>
Array('closetags' => Array('u'),
'allowedchildren' => Array(NULL),
'handler' => Array('TagHandler', 'handle_underline')),
'url' =>
Array('closetags' => Array('url'),
'allowedchildren' => Array(''),
'handler' => Array('TagHandler', 'handle_url') )
),
/* ------- q ------------------- */
'q' =>
Array('quote' =>
Array('closetags' => Array('quote'),
'allowedchildren' => Array(NULL),
'handler' => Array('TagHandler', 'handle_quote'))
)
);
/**
* Returns the tag config for a given tag
*/
static function gettagconfig($tagname) {
if ((strlen($tagname) >= 1) && (isset(TagHandler::$tagconfig[$tagname[0]][$tagname]))) {
return TagHandler::$tagconfig[$tagname[0]][$tagname];
} else {
return NULL;
} // else
} // gettagconfig
/*
* Add additional configuration for a tag
*/
static function setadditionalinfo($tagname, $name, $value) {
TagHandler::$tagconfig[$tagname[0]][$tagname][$name] = $value;
} # setadditionalinfo
/*
* Set the list of denied tags
*/
static function setdeniedtags($deniedtags) {
TagHandler::$deniedtags = $deniedtags;
} // setdeniedtags
/*
* Returns the list of denied tags
*/
static function getdeniedtags($deniedtags) {
return TagHandler::$deniedtags;
} // getdeniedtags
/*
* Processes an tag (when allowed)
*/
static function process_tag($tagname, $params, $contents) {
if (array_search($tagname, TagHandler::$deniedtags) !== FALSE) {
return NULL;
} // if denied tag
if (isset(TagHandler::$tagconfig[$tagname[0]][$tagname]['handler'])) {
return call_user_func_array(TagHandler::$tagconfig[$tagname[0]][$tagname]['handler'],
array($params, $contents));
} else {
// ??
} # if
} // process_tag
/* Returns an empty append/prepend, used for deprecated tags */
static function handle_empty($params, $contents) {
return Array('prepend' => '', 'content' => $contents, 'append' => '');
} // func. handle_empty
static function handle_bold($params, $contents) {
return Array('prepend' => '<b>',
'content' => $contents,
'append' => '</b>');
} // handle_bold
static function handle_underline($params, $contents) {
return Array('prepend' => '<u>',
'content' => $contents,
'append' => '</u>');
} // handle_underline
static function handle_italic($params, $contents) {
return Array('prepend' => '<i>',
'content' => $contents,
'append' => '</i>');
} // handle_italic
/* Handles [br] */
static function handle_br($params, $contents) {
return Array('prepend' => '<br>',
'content' => $contents,
'append' => '');
} // handle_br
/* handle the img tag */
static function handle_img($params, $contents) {
$origAppend = '';
# are only specific images allowed?
if (isset(TagHandler::$tagconfig['i']['img']['allowedimgs'])) {
if (!isset(TagHandler::$tagconfig['i']['img']['allowedimgs'][$params['params'][0]])) {
return TagHandler::handle_empty($params, $contents);
} else {
$origAppend = $contents;
$contents = TagHandler::$tagconfig['i']['img']['allowedimgs'][$params['params'][0]];
} # if
} # if
return Array('prepend' => '<img src="' . $contents . '">',
'content' => $origAppend,
'append' => '');
} // handle_img
/* handle the quote tag */
static function handle_quote($params, $contents) {
# quote it
return Array('prepend' => '<blockquote><strong>' . sprintf(_("%s commented earlier:"), substr($params['originalparams'], 1)). '</strong><br>',
'content' => $contents,
'append' => '</blockquote>');
} // handle_quote
/* handle the img tag */
static function handle_url($params, $contents) {
# are only specific images allowed?
return Array('prepend' => '<a href="' . substr($params['originalparams'], 1) . '">',
'content' => $contents,
'append' => '</a>');
} // handle_url
/* handle the noubb tag */
static function handle_noubb($params, $contents) {
return Array('prepend' => '',
'content' => $contents,
'append' => '');
} // handle_noubb
} // class TagHandler
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