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<?php |
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/** |
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* Caridea |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not |
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* use this file except in compliance with the License. You may obtain a copy of |
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* the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
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* License for the specific language governing permissions and limitations under |
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* the License. |
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* |
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* @copyright 2015-2018 LibreWorks contributors |
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* @license Apache-2.0 |
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*/ |
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namespace Caridea\Session; |
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/** |
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* Session value namespace |
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* |
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* @copyright 2015-2018 LibreWorks contributors |
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* @license Apache-2.0 |
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*/ |
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class Values implements Map |
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{ |
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/** |
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* @var Session |
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*/ |
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protected $session; |
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/** |
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* @var string |
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*/ |
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protected $name; |
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/** |
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* Creates a new Session value namespace. |
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* |
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* @param \Caridea\Session\Session $session The session utility |
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* @param string $name The session value namespace |
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*/ |
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public function __construct(Session $session, string $name) |
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{ |
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if ($name === null || !strlen(trim($name))) { |
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throw new \InvalidArgumentException('Session namespace cannot be blank'); |
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} |
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$this->name = $name; |
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$this->session = $session; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function clear(): void |
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{ |
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if ($this->resume()) { |
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$_SESSION[$this->name] = []; |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function count(): int |
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{ |
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$this->resume(); |
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return count($_SESSION[$this->name]); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function get(string $offset, $alt = null) |
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{ |
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$this->resume(); |
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return isset($_SESSION[$this->name][$offset]) ? |
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$_SESSION[$this->name][$offset] : $alt; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getIterator(): \Iterator |
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{ |
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$this->resume(); |
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return new \ArrayIterator($_SESSION[$this->name]); |
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} |
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/** |
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* Gets the values namespace in the session. |
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* |
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* @return string The values namespace |
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*/ |
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public function getNamespace(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function merge(\Caridea\Session\Map $values): void |
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{ |
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$this->start(); |
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if ($values instanceof Values) { |
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$values->resume(); |
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$_SESSION[$this->name] = array_merge($_SESSION[$this->name], $_SESSION[$values->name]); |
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} else { |
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foreach ($values as $k => $v) { |
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$_SESSION[$this->name][$k] = $v; |
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} |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function offsetExists($offset): bool |
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{ |
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$this->resume(); |
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return isset($_SESSION[$this->name][$offset]); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function offsetGet($offset) |
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{ |
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$this->resume(); |
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return $this->get($offset); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->start(); |
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$_SESSION[$this->name][$offset] = $value; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function offsetUnset($offset) |
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{ |
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if ($this->resume()) { |
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unset($_SESSION[$this->name][$offset]); |
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} |
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} |
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/** |
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* Resumes the session. |
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* |
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* @return bool Whether the session resumed successfully |
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*/ |
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protected function resume(): bool |
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{ |
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return $this->session->resume() && $this->init(); |
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} |
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/** |
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* Starts the session, trying to resume it first. |
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* |
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* @return bool Whether the session started successfully |
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*/ |
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protected function start(): bool |
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{ |
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return $this->resume() || ($this->session->start() && $this->init()); |
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} |
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/** |
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* Initializes the session. |
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* |
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* @return bool Always `true` |
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*/ |
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protected function init(): bool |
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{ |
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if (!isset($_SESSION[$this->name])) { |
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$_SESSION[$this->name] = []; |
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} |
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return true; |
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} |
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} |
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