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<?php |
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namespace CarbonFramework\Flash; |
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use ArrayAccess; |
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use Exception; |
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/** |
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* Provide a way to flash data into the session for the next request |
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*/ |
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class Flash { |
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/** |
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* Root storage array or object implementing ArrayAccess |
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* |
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* @var array|\ArrayAccess |
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*/ |
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protected $root_storage = null; |
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/** |
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* Child storage array or object implementing ArrayAccess |
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* |
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* @var array|\ArrayAccess |
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*/ |
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protected $storage = null; |
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/** |
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* Key to store flashed data in storage with |
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* |
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* @var string |
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*/ |
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protected $storage_key = '__carbonFrameworkFlash'; |
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/** |
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* Constructor |
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* |
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* @param array|\ArrayAccess $storage |
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*/ |
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public function __construct( &$storage ) { |
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$this->setStorage( $storage ); |
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} |
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/** |
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* Return whether a storage object is valid |
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* |
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* @param mixed $storage |
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* @return boolean |
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*/ |
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protected function isValidStorage( $storage ) { |
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return ( is_array( $storage ) || is_a( $storage, ArrayAccess::class ) ); |
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} |
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/** |
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* Throw an exception if storage is not valid |
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* |
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* @throws Exception |
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* @return null |
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*/ |
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protected function validateStorage() { |
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if ( ! $this->isValidStorage( $this->storage ) ) { |
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throw new Exception( 'Attempted to use Flash without an active session. Did you forget to call session_start()?' ); |
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} |
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} |
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/** |
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* Get the storage for flash messages |
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* |
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* @return array|\ArrayAccess |
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*/ |
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public function getStorage() { |
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return $this->root_storage; |
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} |
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/** |
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* Set the storage for flash messages |
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* |
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* @param array|\ArrayAccess $storage |
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* @return null |
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*/ |
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public function setStorage( &$storage ) { |
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if ( ! $this->isValidStorage( $storage ) ) { |
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return; |
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} |
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if ( ! isset( $storage[ $this->storage_key ] ) ) { |
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$storage[ $this->storage_key ] = []; |
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} |
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$this->root_storage = &$storage; |
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$this->storage = &$this->root_storage[ $this->storage_key ]; |
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} |
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/** |
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* Return whether the flash service is enabled |
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* |
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* @return boolean |
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*/ |
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public function enabled() { |
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return $this->isValidStorage( $this->storage ); |
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} |
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/** |
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* Get the entire storage or the values for a key |
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* |
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* @param string|null $key |
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* @return array|\ArrayAccess |
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*/ |
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public function peek( $key = null ) { |
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$this->validateStorage(); |
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if ( $key === null ) { |
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return $this->storage; |
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} |
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if ( isset( $this->storage[ $key ] ) ) { |
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return $this->storage[ $key ]; |
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} |
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return []; |
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} |
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/** |
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* Get and clear the entire storage or the values for a key |
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* |
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* @param string|null $key |
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* @return array|\ArrayAccess |
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*/ |
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public function get( $key = null ) { |
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$this->validateStorage(); |
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$items = $this->peek( $key ); |
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$this->clear( $key ); |
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return $items; |
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} |
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/** |
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* Add values for a key |
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* |
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* @param string $key |
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* @param mixed $new_items |
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*/ |
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public function add( $key, $new_items ) { |
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$this->validateStorage(); |
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$new_items = is_array( $new_items ) ? $new_items : [$new_items]; |
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$items = (array) $this->peek( $key ); |
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$items = array_merge( $items, $new_items ); |
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$this->storage[ $key ] = $items; |
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} |
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/** |
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* Clear the entire storage or the values for a key |
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* |
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* @param string|null $key |
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* @return null |
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*/ |
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public function clear( $key = null ) { |
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$this->validateStorage(); |
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if ( $key === null ) { |
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foreach ( $this->storage as $key => $value ) { |
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$this->storage[ $key ] = []; |
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} |
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} else { |
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$this->storage[ $key ] = []; |
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} |
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} |
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} |
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htmlburger /
wpemerge
