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DotNotation.php

<?php

namespace Liaison\Utility;


/**
 * Converts between  `['i.am.dotted.key' => 'value']` and `['i'=>['am'=>['dotted'=>['key'=>'value']]]]`
 * And retrieve value from nested array using dot key
 */
class DotNotation {

    /**
     * Convert an array from using dotkeys to nested 
     *
     * @return multidemensional / nested array
     */
    static public function nestedfromDotted($array){
        $nestedArray = [];
        foreach ($array as $key=>$value){
            $root = self::nestedFromPair($key, $value);
            $nestedArray = array_replace_recursive($nestedArray, $root);
        }
        return $nestedArray;
    }
    /**
     * Convert a single `[dot.key=>value]` pair into a `[dot=>[key=>value]]` nested array
     * @return multidemensional/nested array
     */
    static public function nestedFromPair($dotKey, $value){
        $parts = explode('.',$dotKey);
        $root = [];
        $flux = &$root;
        for ($i=0;$i<($c=count($parts));$i++){
            // if ($i==0)continue;
            $part = $parts[$i];
            $flux[$part] = [];
            if ($i==($c-1))$flux[$part] = $value;
            else $flux = &$flux[$part];
        }
        return $root;
    }

    /**
     * Get a value from a nested array, using a dotkey
     * @param $dotKey something like `'a.dot.key'`
     * @param $nestedArray something like `[a=>[dot=>[key=>'somevalue']]];`
     * @return mixed value in the given array
     */
    static public function getNestedValue($dotKey, $nestedArray){
        $array = $nestedArray;
        $parts = explode('.',$dotKey);
        $flux = $array;
        foreach ($parts as $key){
            if (!isset($flux[$key]))return null;
            if (!is_array($flux))return null;
            $flux = $flux[$key];
        }
        return $flux;
    }


//     static public function insertPair(&$array, $key, $value){
//         $parts = explode('.',$dotKey);
// //         $root = &$array;
//         $flux = &$array;
//         for ($i=0;$i<($c=count($parts));$i++){
//             // if ($i==0)continue;
//             $part = $parts[$i];
//             $flux[$part] = $flux[$part] ?? [];
//             if ($i==($c-1))$flux[$part] = $value;
//             else $flux = &$flux[$part];
//         }
//     }
}