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<?php |
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/** |
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* Copyright (c) 2015-present Ganbaro Digital Ltd |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* * Neither the names of the copyright holders nor the names of his |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* @category Libraries |
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* @package MissingBits/Types |
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* @author Stuart Herbert <[email protected]> |
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* @copyright 2015-present Ganbaro Digital Ltd www.ganbarodigital.com |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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* @link http://ganbarodigital.github.io/php-the-missing-bits |
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*/ |
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namespace GanbaroDigital\MissingBits\TypeInspectors; |
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use stdClass; |
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/** |
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* return a practical list of data types for any value or variable |
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*/ |
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class GetDuckTypes |
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{ |
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/** |
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* which method do we want to call for a given type? |
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* |
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* @var array |
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*/ |
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private static $dispatchTable = [ |
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'array' => 'fromArray', |
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'double' => 'fromDouble', |
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'integer' => 'fromInteger', |
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'object' => 'fromObject', |
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'string' => 'fromString' |
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]; |
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/** |
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* return a practical list of data types for any value or variable |
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* |
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* @param mixed $item |
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* the item to examine |
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* @return string[] |
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* the list of type(s) that this item can be |
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*/ |
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public function getDuckTypes($item) |
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{ |
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return self::from($item); |
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} |
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/** |
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* return a practical list of data types for any value or variable |
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* |
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* @param mixed $item |
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* the item to examine |
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* @return string[] |
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* the list of type(s) that this item can be |
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*/ |
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public static function from($item) |
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{ |
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$type = gettype($item); |
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if (isset(self::$dispatchTable[$type])) { |
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$method = self::$dispatchTable[$type]; |
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return self::$method($item); |
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} |
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// if we get here, then we just return the PHP scalar type |
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return [ $type => $type ]; |
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} |
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/** |
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* get the list of possible types that could match an array |
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* |
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* @param array $item |
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* the item to examine |
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* @return string[] |
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* a list of matching types |
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*/ |
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private static function fromArray($item) |
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{ |
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// our return type |
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$retval = array_merge( |
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array_slice(GetArrayTypes::from($item), 0, -1), |
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[ |
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'Traversable' => 'Traversable', |
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'array' => 'array' |
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] |
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); |
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// all done |
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return $retval; |
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} |
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/** |
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* get the list of possible types that could match a floating point |
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* number |
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* |
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* @param double $item |
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* the item to examine |
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* @return string[] |
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* a list of matching types |
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*/ |
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private static function fromDouble($item) |
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{ |
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return [ |
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"double" => "double", |
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"numeric" => "numeric", |
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]; |
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} |
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/** |
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* get the list of possible types that could match an integer |
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* |
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* @param integer $item |
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* the item to examine |
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* @return string[] |
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* a list of matching types |
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*/ |
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private static function fromInteger($item) |
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{ |
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return [ |
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"integer" => "integer", |
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"numeric" => "numeric", |
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]; |
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} |
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/** |
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* get the list of possible types that could match an object |
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* |
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* @param object $item |
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* the item to examine |
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* @return string[] |
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* a list of matching objects |
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*/ |
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private static function fromObject($item) |
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{ |
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$retval = array_merge( |
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GetObjectTypes::from($item), |
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self::getObjectSpecialTypes($item), |
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[ 'object' => 'object' ] |
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); |
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return $retval; |
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} |
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/** |
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* hard-coded rules for dealing with PHP's built-in classes |
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* |
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* @param object $object |
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* object to examine |
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* @return array |
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*/ |
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private static function getObjectSpecialTypes($object) |
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{ |
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$retval = []; |
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if ($object instanceof stdClass) { |
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$retval['Traversable'] = 'Traversable'; |
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} |
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return $retval; |
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} |
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/** |
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* return any data type's type name |
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* |
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* @param mixed $item |
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* the item to examine |
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* @return array |
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* the basic type of the examined item |
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*/ |
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private static function fromString($item) |
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{ |
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return GetStringDuckTypes::from($item); |
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} |
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} |
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