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<?php |
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namespace Rexlabs\Smokescreen\Includes; |
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use Rexlabs\Smokescreen\Exception\ParseIncludesException; |
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/** |
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* Container object for managing include keys and optional mapped parameters. |
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* @package Rexlabs\Smokescreen\Includes |
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*/ |
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class Includes |
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{ |
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/** @var array */ |
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protected $keys; |
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/** @var array */ |
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protected $params = []; |
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/** |
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* Provide a list of keys, and optional parameters for those keys |
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* @param array $keys |
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* @param array $params |
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*/ |
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public function __construct(array $keys = [], array $params = []) |
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{ |
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$this->set($keys); |
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$this->params = $params; |
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} |
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/** |
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* @param array $keys |
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* @return $this |
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*/ |
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public function set(array $keys) |
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{ |
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$this->keys = $this->expandKeys($keys); |
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return $this; |
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} |
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/** |
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* Provide a list of keys, so that depth-keys are expanded to include parents |
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* Given a two keys of [user.id, photo.url], this method will return [user, photo, user.id, photo.url] |
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* @param array $keys |
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* @return array |
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*/ |
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protected function expandKeys(array $keys): array |
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{ |
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$allKeys = []; |
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// Search all keys that contain the '.', and add their parents all the way up. |
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foreach ($keys as $key) { |
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$allKeys[] = $key; |
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while (($dot = \strrpos($key, '.')) !== false) { |
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$key = \substr($key, 0, $dot); |
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$allKeys[] = $key; |
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} |
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} |
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// We probably created some dupes ... |
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$allKeys = \array_unique($allKeys); |
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return $allKeys; |
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} |
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/** |
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* Add one or more keys. |
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* Duplicate keys will be silently ignored. |
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* @param string|array|mixed $keys |
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* @return $this |
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*/ |
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public function add($keys) |
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{ |
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foreach ($this->expandKeys((array)$keys) as $key) { |
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if (!$this->has($key)) { |
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$this->keys[] = $key; |
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} |
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} |
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return $this; |
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} |
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/** |
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* Determine if a given key exists |
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* @param $key |
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* @return bool |
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*/ |
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public function has($key): bool |
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{ |
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return \in_array($key, $this->keys(), true); |
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} |
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/** |
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* Get an array of all keys, note this will include expanded keys (parents) |
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* @return array |
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*/ |
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public function keys(): array |
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{ |
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return $this->keys; |
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} |
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/** |
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* Returns true if any keys have been set. |
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* @return bool |
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*/ |
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public function hasKeys(): bool |
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{ |
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return \count($this->keys) > 0; |
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} |
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/** |
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* Remove one or more keys |
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* @param array|string $keys |
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*/ |
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public function remove($keys) |
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{ |
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$keys = (array)$keys; // Cast all the things |
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$this->keys = array_filter($this->keys(), function($key) use ($keys) { |
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foreach ($keys as $remove) { |
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if (preg_match('/^' . preg_quote($remove, '/') . '(\..+)?$/', $key)) { |
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// Keys and descendant keys will be removed |
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return false; |
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} |
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} |
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return true; |
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}); |
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} |
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/** |
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* Only keys that don't descend (eg. don't contain a dot) |
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* @return array |
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*/ |
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public function baseKeys(): array |
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{ |
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return \array_values(\array_filter($this->keys(), function($key) { |
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return \strpos($key, '.') === false; |
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})); |
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} |
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/** |
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* Return the params associative array |
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* @return array |
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*/ |
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public function params(): array |
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{ |
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return $this->params; |
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} |
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/** |
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* Returns true if any parameters have been set |
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* @return bool |
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*/ |
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public function hasParams(): bool |
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{ |
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return \count($this->params) > 0; |
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} |
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/** |
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* An array of parameters indexed by key |
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* @param array $params |
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* @return $this |
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* @throws ParseIncludesException |
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*/ |
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public function setParams(array $params) |
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{ |
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// Is this an associative array? |
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if (!empty($params)) { |
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if (\count(array_filter(array_keys($params), '\is_string')) < 1) { |
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throw new ParseIncludesException('Parameters must be an associative array indexed by key'); |
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} |
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} |
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$this->params = $params; |
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return $this; |
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} |
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/** |
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* Get the parameters for the given key |
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* An empty array will be returned for non-matched keys |
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* @param string $key |
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* @return array |
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*/ |
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public function paramsFor(string $key): array |
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{ |
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$params = []; |
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if (isset($this->params[$key])) { |
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$params = $this->params[$key]; |
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} |
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return $params; |
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} |
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/** |
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* All keys and params will be reset |
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* @return $this |
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*/ |
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public function reset() |
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{ |
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$this->keys = []; |
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$this->params = []; |
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return $this; |
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} |
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/** |
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* Returns a new Includes object containing all keys spliced below the given parent key, |
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* as well as any mapped params |
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* @param string $parentKey |
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* @return static |
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* @see Includes::descendantsOf() |
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* @see Includes::allParamsFor() |
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*/ |
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public function splice($parentKey) |
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{ |
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// Get all the descendant keys |
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$keys = $this->descendantsOf($parentKey); |
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// Cool, we have a list of keys, now let's get the associated params |
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$params = $this->allParamsFor($keys); // That was hard |
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return new static( |
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$keys, |
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$params |
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); |
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} |
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/** |
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* Given a parent key, return all the descendant keys (without the parent prefix) |
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* Example: Given key is "user", the current keys are ["user.id", "user.photos", "user.photos.id"] |
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* The result will be: ["id", "photos", "photos.id"] |
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* @param string $parentKey |
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* @return array |
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*/ |
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public function descendantsOf(string $parentKey): array |
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{ |
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// First get child keys of the given parent key |
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$keys = []; |
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foreach ($this->keys() as $key) { |
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if (strpos($key, "{$parentKey}.") === 0) { |
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// Found a match, chop off the parent key |
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$keys[] = preg_replace( |
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'/^' . preg_quote($parentKey . '.', '/') . '/', // Starts with parent |
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'', // Remove it |
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$key |
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); |
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} |
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} |
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return $keys; |
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} |
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/** |
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* Get the parameters for the given keys as an associative array indexed by key |
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* An empty array will be returned if there are no matched keys |
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* @param array $keys |
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* @return array |
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*/ |
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public function allParamsFor(array $keys): array |
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{ |
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$params = []; |
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foreach ($keys as $key) { |
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if (isset($this->params[$key])) { |
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$params[$key] = $this->params[$key]; |
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} |
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} |
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return $params; |
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} |
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} |