= 0) && ($bytes < $kilobyte)) {
return $bytes . ' B';
}
elseif (($bytes >= $kilobyte) && ($bytes < $megabyte)) {
return round($bytes / $kilobyte, $precision) . ' KB';
}
elseif (($bytes >= $megabyte) && ($bytes < $gigabyte)) {
return round($bytes / $megabyte, $precision) . ' MB';
}
elseif (($bytes >= $gigabyte) && ($bytes < $terabyte)) {
return round($bytes / $gigabyte, $precision) . ' GB';
}
elseif ($bytes >= $terabyte) {
return round($bytes / $terabyte, $precision) . ' TB';
}
else {
return $bytes . ' B';
}
}
/**
* Creates a label for control group symbols.
*/
function islandora_control_group_to_human_readable($control_group) {
switch ($control_group) {
case 'M':
return 'Managed';
case 'X':
return 'Inline XML';
case 'R':
return 'Redirect';
case 'E':
return 'Externally Referenced';
default:
return $control_group;
}
}
/**
* Checks if the given pid is valid.
*
* @param string $pid
* The object id to check.
*
* @return boolean
* TRUE if valid, FALSE otherwise.
*/
function islandora_is_valid_pid($pid) {
return drupal_strlen(trim($pid)) <= 64 && preg_match('/^([A-Za-z0-9]|-|\.)+:(([A-Za-z0-9])|-|\.|~|_|(%[0-9A-F]{2}))+$/', trim($pid));
}
/**
* Checks if the given datastream id is valid.
*
* @param string $dsid
* The datastream id to check.
*
* @return boolean
* TRUE if valid, FALSE otherwise.
*/
function islandora_is_valid_dsid($dsid) {
return drupal_strlen(trim($dsid)) <= 64 && preg_match('/^[a-zA-Z0-9\_\-\.]+$/', trim($dsid));
}
/**
* Helper function to describe a Fedora repository.
*
* Can be used to check if Fedora is available.
*
* @param string $url
* A url to a Fedora repository, if NULL the default is used.
* @return
* Returns an array describing the repository. Returns FALSE if Fedora is down
* or if the url is incorrect.
*/
function islandora_describe_repository($url = NULL) {
$url = isset($url) ? $url : variable_get('islandora_base_url', 'http://localhost:8080/fedora');
$connection = new IslandoraTuque(NULL, $url);
try {
$info = $connection->api->a->describeRepository();
return $info;
}
catch (RepositoryException $e) {
return FALSE;
}
}
/**
* Build a list of all the hooks to call.
*
* Concatenates the each pid (escaped) to the hook name, for calling in
* module_invoke_all().
*
* @param string $hook
* A hook to call.
* @param array $pids
* An array of PIDs (probably content models).
*
* @return array
* An array with each PID escaped and concatenated with the base hook name,
* in addition to the base hook name at the end.
*/
function islandora_build_hook_list($hook, $pids = array()) {
$hooks = array();
foreach ($pids as $model) {
$hooks[] = islandora_escape_pid_for_function($model) . '_' . $hook;
}
$hooks[] = $hook;
return $hooks;
}
/**
* Escape a Fedora PID to be valid inside of a PHP function name.
*
* Originally intended to allow inclusion of a PID in a module_invoke_all()
* call.
*/
function islandora_escape_pid_for_function($pid) {
// Apparently, case doesn't matter for function calls in PHP, so let's not
// really worry about changing the case.
return str_replace(
// Any PID characters which are not valid in the name of a PHP function.
array(
':',
'-',
),
'_',
$pid
);
}
/**
* Gets the namespace of the given id.
*
* @param string $id
* Either a PID or namespace to check for accessibility. Any string like those
* below are fine.
*
* @code
* 'islandora',
* 'islandora:',
* 'islandora:1234',
* @endcode
*
* @return string
* The namespace portion of the given string.
*/
function islandora_get_namespace($id) {
$matches = array();
preg_match('/^([^:]*)/', $id, $matches);
return $matches[0];
}
/**
* Checks the given namespace or PID is/has an accessible namespace as defined
* by the "islandora_pids_allowed" variable.
*
* @param string $namespace
* Either a PID or namespace to check for accessibility. Any string like those
* below are fine.
*
* @code
* 'islandora',
* 'islandora:',
* 'islandora:1234',
* @endcode
*
* @return boolean
* TRUE if accessible, FALSE otherwise.
*/
function islandora_namespace_accessible($id) {
if (variable_get('islandora_namespace_restriction_enforced', FALSE)) {
$namespace = islandora_get_namespace($id) . ':';
$allowed_namespaces = explode(" ", variable_get('islandora_pids_allowed', 'default: demo: changeme: islandora: ilives: islandora-book: books: newspapers: '));
return in_array($namespace, $allowed_namespaces);
}
return TRUE;
}