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MDL-20196 improved plugin_supports() for all plugin types

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This commit is contained in:
skodak 2009-09-01 08:39:01 +00:00
parent a4397489c1
commit f5a08da4c5
1 changed files with 30 additions and 22 deletions
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52
lib/moodlelib.php
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@ -6969,41 +6969,49 @@ function plugin_callback($type, $name, $feature, $action, $options = null, $defa
* @param string $feature Feature code (FEATURE_xx constant)
* @param mixed $default default value if feature support unknown
* @return mixed Feature result (false if not supported, null if feature is unknown,
* otherwise usually true but may have other feature-specific value)
* otherwise usually true but may have other feature-specific value such as array)
*/
function plugin_supports($type, $name, $feature, $default=null) {
global $CFG;
$name = clean_param($name, PARAM_SAFEDIR);
$name = clean_param($name, PARAM_SAFEDIR); //bit of extra security
switch($type) {
case 'mod' :
$file = $CFG->dirroot.'/mod/'.$name.'/lib.php';
$function = $name.'_supports';
break;
default:
throw new Exception('Unsupported plugin type ('.$type.')');
if ($type === 'mod') {
// we need this special case because we support subplugins in modules,
// otherwise it would end up in infinite loop
if ($name === 'NEWMODULE') {
//somebody forgot to rename the module template
return false;
}
include_once("$CFG->dirroot/mod/$name/lib.php");
$function = $name.'_supports';
} else {
if (!$dir = get_plugin_directory($type, $name)) {
throw new coding_exception("Unsupported plugin type or name ($type/$name)");
}
$libfile = $dir.'/lib.php';
if (file_exists($libfile)) {
include_once($libfile);
}
$function = $type.'_'.$name.'_supports';
}
// Load library and look for function
if (file_exists($file)) {
require_once($file);
}
if (function_exists($function)) {
// Function exists, so just return function result
$supports = $function($feature);
if (is_null($supports)) {
// plugin does not know - use default
return $default;
} else {
return $supports;
}
} else {
switch($feature) {
// If some features can also be checked in other ways
// for legacy support, this could be added here
default: return $default;
}
}
//plugin does not care, so use default
return $default;
}
/**
@ -7928,7 +7936,7 @@ function make_menu_from_list($list, $separator=',') {
/**
* Creates an array that represents all the current grades that
* can be chosen using the given grading type.
* can be chosen using the given grading type.
*
* Negative numbers
* are scales, zero is no grade, and positive numbers are maximum
@ -9010,7 +9018,7 @@ function is_proxybypass( $url ) {
/**
* Check if the passed navigation is of the new style
*
*
* @param mixed $navigation
* @return bool true for yes false for no
*/