Generate data in key/value structure / For ex: for admin panel dashboard

DataStructureGenerator.php

<?php
/**
 *
  * @author      Saeedvir [
 *                      'email'     =>  'saeed.es91@gmail.com',
 *                      'telegram'  =>  'https://t.me/PhpWebDeveloper'
 *                     ]
 * @usage :
        $dataGenerator = new DataStructureGenerator('data', true,true);
        $dataGenerator->setData('users', 8);
        $dataGenerator->setData('payments', 8000);

        # laravel ex:
        $dataGenerator->setDataFromModel(new \App\User, function ($model) {
        return $model->select('id')->count();
        }, 'users', 8000);

        $dataGenerator->setKeyFunctions(
            [
                'payments' => function ($value) {
                    return number_format($value);
                },
            ]
        );

        print_r($dataGenerator->getJsonData(true);
        print_r($dataGenerator->getJsonData(false, ['users']));
 */
class DataStructureGenerator
{

    protected $data_response = [];
    protected $pkn;
    protected $enable_hash       = false;
    protected $enable_timestamps = false;
    protected $key_functions     = [];

    public function __construct($pkn = 'data', $enable_hash = false, $enable_timestamps = false)
    {
        if (is_string($pkn)) {
            $this->pkn = 'data';
        }
        $this->enable_hash               = $enable_hash;
        $this->enable_timestamps         = $enable_timestamps;
        $this->data_response[$this->pkn] = [];

    }

    public function setData($key, $value)
    {
        $this->data_response[$this->pkn][$key] = $value;
    }
    public function setDataFromModel($model, $func = null, $key, $value)
    {
        if (!$func) {
            return null;
        }
        $this->data_response[$this->pkn][$key] = $func($model);
    }
    public function getData($key)
    {
        if (isset($this->data_response[$this->pkn][$key])) {
            return $this->data_response[$this->pkn][$key];
        }
        return null;
    }
    public function removeData($key)
    {
        if (isset($this->data_response[$this->pkn][$key])) {
            unset($this->data_response[$this->pkn][$key]);
            return true;
        }
        return false;
    }

    public function emptyData()
    {
        $this->data_response[$this->pkn] = [];
    }

    public function setKeyFunctions($key_functions = [])
    {
        if (is_array($key_functions)) {
            $this->key_functions = $key_functions;
        } else {
            $this->key_functions = [];
        }

    }

    public function getJsonData($return_json = true, $keys = [])
    {
        if ($this->enable_hash) {
            $this->data_response['_hash'] = $this->generateArrayHash('serialize');
        }
        if ($this->enable_timestamps) {
            $this->data_response['_timestaps'] = time();
        }
        $this->data_response[$this->pkn] = $this->getDataWithKeys($keys);

        $this->walkKeyFunctions();

        if ($return_json) {
            return json_encode($this->data_response);
        } else {
            return $this->data_response;
        }

    }

    protected function getDataWithKeys($keys = [])
    {
        if (is_array($keys) && count($keys) > 0) {
            return array_intersect_key($this->data_response[$this->pkn], array_flip(array_values($keys)));
        } else {
            return $this->data_response[$this->pkn];
        }
    }

    protected function generateArrayHash($mode = 'serialize')
    {
        if ($mode === 'json_encode') {
            //use json_encode
            return md5(json_encode($this->data_response[$this->pkn]));
        } else {
            //use serialize
            return md5(serialize($this->data_response[$this->pkn]));
        }
    }

    protected function walkKeyFunctions()
    {
        if (count($this->key_functions) > 0) {
            foreach ($this->data_response[$this->pkn] as $key => $value) {
                if (isset($this->key_functions[$key])) {
                    if (is_callable($this->key_functions[$key])) {
                        $this->data_response[$this->pkn][$key] = $this->key_functions[$key]($value);
                    } else {
                        $this->data_response[$this->pkn][$key] = $this->key_functions[$key];
                    }
                }

            }
        }
    }

}