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<?php namespace Chekote\NounStore; |
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use InvalidArgumentException; |
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use OutOfBoundsException; |
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class Store |
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{ |
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/** @var Key */ |
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protected $keyService; |
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/** @var array */ |
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protected $nouns; |
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/** |
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* @param Key $keyService the key service to use for parsing and building keys |
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* @codeCoverageIgnore |
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*/ |
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public function __construct(Key $keyService = null) |
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{ |
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$this->keyService = $keyService ?: Key::getInstance(); |
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} |
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/** |
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* Removes all entries from the store. |
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* |
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* @return void |
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*/ |
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public function reset() |
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{ |
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$this->nouns = []; |
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} |
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/** |
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* Retrieves a value for the specified key. |
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* |
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* Each key is actually a collection. If you do not specify which item in the collection you want, |
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* the method will return the most recent entry. You can specify the entry you want by either |
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* using the plain english 1st, 2nd, 3rd etc in the $key param, or by specifying 0, 1, 2 etc in |
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* the $index param. For example: |
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* |
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* Retrieve the most recent entry "Thing" collection: |
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* retrieve("Thing") |
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* |
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* Retrieve the 1st entry in the "Thing" collection: |
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* retrieve("1st Thing") |
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* retrieve("Thing", 0) |
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* |
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* Retrieve the 3rd entry in the "Thing" collection: |
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* retrieve("3rd Thing") |
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* retrieve("Thing", 2) |
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* |
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* Please note: The nth value in the string key is indexed from 1. In that "1st" is the first item stored. |
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* The index parameter is indexed from 0. In that 0 is the first item stored. |
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* |
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* Please Note: If you specify both an $index param and an nth in the $key, they must both reference the same index. |
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* If they do not, the method will throw an InvalidArgumentException. |
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* |
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* retrieve("1st Thing", 1); |
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* |
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* @param string $key The key to retrieve the value for. Can be prefixed with an nth descriptor. |
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* @param int $index [optional] The index of the key entry to retrieve. If not specified, the |
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* method will return the most recent value stored under the key. |
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* @throws InvalidArgumentException if both an $index and $key are provided, but the $key contains an nth value |
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* that does not match the index. |
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* @return mixed The value, or null if no value exists for the specified key/index combination. |
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*/ |
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public function get($key, $index = null) |
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{ |
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list($key, $index) = $this->keyService->parse($key, $index); |
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if (!$this->keyExists($key, $index)) { |
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return; |
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} |
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return $index !== null ? $this->nouns[$key][$index] : end($this->nouns[$key]); |
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} |
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/** |
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* Retrieves all values for the specified key. |
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* |
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* @param string $key The key to retrieve the values for. |
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* @throws OutOfBoundsException if the specified $key does not exist in the store. |
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* @return array The values. |
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*/ |
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public function getAll($key) |
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{ |
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if (!isset($this->nouns[$key])) { |
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throw new OutOfBoundsException("'$key' does not exist in the store"); |
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} |
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return $this->nouns[$key]; |
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} |
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/** |
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* Determines if a value has been stored for the specified key. |
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* |
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* @param string $key The key to check. |
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* @param int $index [optional] The index of the key entry to check. If not specified, the |
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* method will ensure that at least one item is stored for the key. |
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* @throws InvalidArgumentException if both an $index and $key are provided, but the $key contains an nth value |
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* that does not match the index. |
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* @return bool True if the a value has been stored, false if not. |
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*/ |
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public function keyExists($key, $index = null) |
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{ |
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list($key, $index) = $this->keyService->parse($key, $index); |
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return $index !== null ? isset($this->nouns[$key][$index]) : isset($this->nouns[$key]); |
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} |
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/** |
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* Asserts that the key's value contains the specified string. |
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* |
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* @param string $key The key to check. @see self::get() for formatting options. |
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* @param string $value The value expected to be contained within the key's value. |
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* @param int $index [optional] The index of the key entry to retrieve. If not specified, the |
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* method will check the most recent value stored under the key. |
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* @throws InvalidArgumentException if both an $index and $key are provided, but the $key contains an nth value |
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* that does not match the index. |
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* @return bool True if the key's value contains the specified string, false if not. |
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*/ |
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public function keyValueContains($key, $value, $index = null) |
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{ |
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list($key, $index) = $this->keyService->parse($key, $index); |
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$actual = $this->get($key, $index); |
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return is_string($actual) && strpos($actual, $value) !== false; |
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} |
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/** |
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* Stores a value for the specified key. |
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* |
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* @param string $key The key to store the value under. |
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* @param mixed $value The value to store. |
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*/ |
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public function set($key, $value) |
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{ |
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$this->nouns[$key][] = $value; |
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} |
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} |
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