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<?php declare(strict_types=1); |
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namespace FileEye\MimeMap\Map; |
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use FileEye\MimeMap\MappingException; |
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/** |
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* Abstract base class for managing MimeMap maps. |
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* |
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* This class cannot be instantiated. |
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*/ |
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abstract class BaseMap implements MapInterface |
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{ |
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/** |
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* Singleton instance. |
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* |
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* @var BaseMap |
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*/ |
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protected static $instance; |
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/** |
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* Mapping between file extensions and MIME types. |
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* |
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* @var array<string, array<int|string, array<string, array<int,string>>>> |
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*/ |
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protected static $map = []; |
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/** |
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* A backup of the mapping between file extensions and MIME types. |
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* |
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* Used during the map update process. |
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* |
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* @var array<string, array<int|string, array<string, array<int,string>>>>|null |
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*/ |
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protected static $backupMap; |
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public function __construct() |
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{ |
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} |
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public function backup(): void |
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{ |
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static::$backupMap = static::$map; |
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} |
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public function reset(): void |
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{ |
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if (isset(static::$backupMap)) { |
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static::$map = static::$backupMap; |
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} |
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static::$backupMap = null; |
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} |
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public static function getInstance(): MapInterface |
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{ |
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if (static::$instance === null) { |
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static::$instance = new static(); |
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} |
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return static::$instance; |
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} |
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public function getFileName(): string |
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{ |
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throw new \LogicException(__METHOD__ . ' is not implemented in ' . get_called_class()); |
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} |
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public function getMapArray(): array |
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{ |
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return static::$map; |
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} |
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public function sort(): MapInterface |
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{ |
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foreach (array_keys(static::$map) as $k) { |
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ksort(static::$map[$k]); |
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foreach (static::$map[$k] as &$sub) { |
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ksort($sub); |
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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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* Gets a list of entries of the map. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $match |
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* (Optional) a match wildcard to limit the list. |
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* |
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* @return array<int, int|string> |
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* The list of the entries. |
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*/ |
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protected function listEntries(string $entry, string $match = null): array |
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{ |
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if (!isset(static::$map[$entry])) { |
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return []; |
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} |
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$list = array_keys(static::$map[$entry]); |
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if (is_null($match)) { |
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return $list; |
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} else { |
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$re = strtr($match, ['/' => '\\/', '*' => '.*']); |
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return array_filter($list, function ($v) use ($re) { |
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return preg_match("/$re/", (string) $v) === 1; |
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}); |
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} |
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} |
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/** |
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* Gets the content of an entry of the map. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $entry_key |
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* The main entry value. |
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* |
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* @return array<string|int,array<string>> |
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* The values of the entry, or empty array if missing. |
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*/ |
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protected function getMapEntry(string $entry, string $entry_key): array |
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{ |
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return isset(static::$map[$entry][$entry_key]) ? static::$map[$entry][$entry_key] : []; |
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} |
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/** |
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* Gets the content of a subentry of the map. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $entry_key |
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* The main entry value. |
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* @param string $sub_entry |
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* The sub entry. |
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* |
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* @return string[] |
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* The values of the subentry, or empty array if missing. |
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*/ |
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protected function getMapSubEntry(string $entry, string $entry_key, string $sub_entry): array |
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{ |
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return isset(static::$map[$entry][$entry_key][$sub_entry]) ? static::$map[$entry][$entry_key][$sub_entry] : []; |
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} |
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/** |
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* Adds an entry to the map. |
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* |
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* Checks that no duplicate entries are made. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $entry_key |
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* The main entry value. |
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* @param string $sub_entry |
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* The sub entry. |
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* @param string $value |
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* The value to add. |
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* |
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* @return $this |
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*/ |
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protected function addMapSubEntry(string $entry, string $entry_key, string $sub_entry, string $value): MapInterface |
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{ |
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if (!isset(static::$map[$entry][$entry_key][$sub_entry])) { |
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static::$map[$entry][$entry_key][$sub_entry] = [$value]; |
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} else { |
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if (array_search($value, static::$map[$entry][$entry_key][$sub_entry]) === false) { |
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static::$map[$entry][$entry_key][$sub_entry][] = $value; |
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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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* Removes an entry from the map. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $entry_key |
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* The main entry value. |
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* @param string $sub_entry |
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* The sub entry. |
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* @param string $value |
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* The value to remove. |
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* |
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* @return bool |
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* true if the entry was removed, false if the entry was not present. |
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*/ |
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protected function removeMapSubEntry(string $entry, string $entry_key, string $sub_entry, string $value): bool |
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{ |
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// Return false if no entry. |
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if (!isset(static::$map[$entry][$entry_key][$sub_entry])) { |
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return false; |
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} |
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// Return false if no value. |
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$k = array_search($value, static::$map[$entry][$entry_key][$sub_entry]); |
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if ($k === false) { |
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return false; |
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} |
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// Remove the map sub entry key. |
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unset(static::$map[$entry][$entry_key][$sub_entry][$k]); |
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// Remove the sub entry if no more values. |
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if (empty(static::$map[$entry][$entry_key][$sub_entry])) { |
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unset(static::$map[$entry][$entry_key][$sub_entry]); |
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} else { |
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// Resequence the remaining values. |
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$tmp = []; |
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foreach (static::$map[$entry][$entry_key][$sub_entry] as $v) { |
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$tmp[] = $v; |
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} |
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static::$map[$entry][$entry_key][$sub_entry] = $tmp; |
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} |
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// Remove the entry if no more values. |
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if (empty(static::$map[$entry][$entry_key])) { |
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unset(static::$map[$entry][$entry_key]); |
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} |
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return true; |
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} |
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/** |
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* Sets a value as the default for an entry. |
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* |
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* @param string $entry |
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* The main array entry. |
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* @param string $entry_key |
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* The main entry value. |
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* @param string $sub_entry |
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* The sub entry. |
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* @param string $value |
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* The value to add. |
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* |
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* @throws MappingException if no mapping found. |
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* |
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* @return $this |
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*/ |
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protected function setValueAsDefault(string $entry, string $entry_key, string $sub_entry, string $value): MapInterface |
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{ |
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// Throw exception if no entry. |
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if (!isset(static::$map[$entry][$entry_key][$sub_entry])) { |
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throw new MappingException("Cannot set '{$value}' as default for '{$entry_key}', '{$entry_key}' not defined"); |
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} |
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// Throw exception if no entry-value pair. |
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$k = array_search($value, static::$map[$entry][$entry_key][$sub_entry]); |
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if ($k === false) { |
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throw new MappingException("Cannot set '{$value}' as default for '{$entry_key}', '{$value}' not associated to '{$entry_key}'"); |
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} |
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// Move value to top of array and resequence the rest. |
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$tmp = [$value]; |
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foreach (static::$map[$entry][$entry_key][$sub_entry] as $kk => $v) { |
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if ($kk === $k) { |
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continue; |
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} |
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$tmp[] = $v; |
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} |
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static::$map[$entry][$entry_key][$sub_entry] = $tmp; |
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return $this; |
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} |
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} |
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