/**
* Deletes one or more object types from the system and cache
*
* @version 1.0
* @since 1.0
* @param int/array $type_id | Single type_id as int. Multiple type_ids as array of ints.
* @return bool | Exception on failure. True on success. False on nonexistent.
*/
public function dropType($type_id)
{
$db = new FOX_db();
if (!is_array($type_id)) {
$type_id = array($type_id);
}
// Fetch the type_id, type_slug, and module_id for each object type to be
// deleted. This info is necessary to remove each type's cache entries.
$args = array(array("col" => "type_id", "op" => "=", "val" => $type_id));
$columns = array("mode" => "include", "col" => array("type_id", "type_slug", "module_id"));
$ctrl = array("format" => "array_key_array", "key_col" => array("type_id"));
try {
$del_types = $db->runSelectQuery($this->_struct(), $args, $columns, $ctrl);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 1, 'text' => "Error reading from database", 'data' => array('args' => $args, 'columns' => $columns, 'ctrl' => $ctrl), 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
if ($del_types) {
// The if($del_types) prevents foreach() crashing if
// none of the object types specified actually exist in the db
// Lock and load the cache
// ==========================
try {
$cache_image = self::lockCache();
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 2, 'text' => "Error locking cache", 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Run the update
// ==========================
try {
$rows_changed = $db->runDeleteQueryCol($this->_struct(), "type_id", "=", $type_id);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 3, 'text' => "Error writing to database", 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Rebuild the cache image
// ==========================
foreach ($del_types as $type => $data) {
unset($cache_image["slug_to_type_id"][$data["module_id"]][$data["type_slug"]]);
unset($cache_image["module_id_types"][$data["module_id"]]);
unset($cache_image["keys"][$type]);
}
unset($type, $data);
// Update the persistent cache, releasing our lock
// ===========================================================
try {
self::writeCache($cache_image);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 4, 'text' => "Cache write error", 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Overwrite the class cache
$this->cache = $cache_image;
}
return (bool) $rows_changed;
}
/**
* Deletes one or more modules
*
* @version 1.0
* @since 1.0
* @param int/array $module_id | Single module_id as int. Multiple module_ids as array of ints.
* @return int | Exception on failure. Number of affected db rows on success.
*/
public function dropModule($module_id)
{
$db = new FOX_db();
if (!is_array($module_id)) {
$module_id = array($module_id);
}
// Fetch the level_id, level_slug, and type_id for each level_id owned
// by the module_id to be deleted.
// **This info is necessary to remove each level's cache entries**
// ========================================================================
$args = array(array("col" => "module_id", "op" => "=", "val" => $module_id));
$columns = array("mode" => "include", "col" => array("level_id", "level_slug", "type_id"));
$ctrl = array("format" => "array_key_array", "key_col" => array("level_id"));
try {
$del_types = $db->runSelectQuery($this->_struct(), $args, $columns, $ctrl);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 1, 'text' => "Error reading from database", 'data' => array('args' => $args, 'columns' => $columns, 'ctrl' => $ctrl), 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
if (!$del_types) {
// No items exist in the db
return 0;
}
// Lock the cache
// ==========================
try {
$cache_image = self::lockCache();
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 2, 'text' => "Cache read error", 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Clear items from the db
// ==========================
try {
$rows_changed = $db->runDeleteQueryCol($this->_struct(), "module_id", "=", $module_id);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 3, 'text' => "Error while deleting from database", 'data' => array("module_id" => $module_id), 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Rebuild the cache image
// ==========================
foreach ($del_types as $level => $data) {
unset($cache_image["slug_to_level_id"][$data["module_id"]][$data["type_id"]][$data["level_slug"]]);
unset($cache_image["type_levels"][$data["type_id"]]);
unset($cache_image["keys"][$level]);
}
unset($level, $data);
// Update the persistent cache, releasing our lock
// ===========================================================
try {
self::writeCache($cache_image);
} catch (FOX_exception $child) {
throw new FOX_exception(array('numeric' => 4, 'text' => "Cache write error", 'file' => __FILE__, 'class' => __CLASS__, 'function' => __FUNCTION__, 'line' => __LINE__, 'child' => $child));
}
// Overwrite the class cache
$this->cache = $cache_image;
return (int) $rows_changed;
}
