SendOwl - Simple API Wrapper

example.php

<?php

class WPEPAddOnSalesEngine_SendOwlAPI {

  /**
   * @var string
   */
  private $_api_end_point_products = 'https://www.sendowl.com/api/v1_2/products';
  private $_api_end_point_product_subscriptions = 'https://www.sendowl.com/api/v1_3/subscriptions';

  /**
   * @var string
   */
  private $_request_information;

  /**
   * WPEPAddOnSalesEngine_SendOwlAPI constructor.
   * @param string $key
   * @param string $secret
   */
  public function __construct( string $key, string $secret ) {
    $this->_request_information = [
      'auth'  => [ $key, $secret ]
    ];
  }

  /**
   * @param int $pagination_limit
   * @param int $pagination_page
   * @return array|mixed|object
   */
  public function get_products( $pagination_limit = 10, $pagination_page = 1 ) {
    return $this->_request_get_entries( $this->_api_end_point_products, $pagination_limit, $pagination_page, 'product' );
  }

  /**
   * @param int $pagination_limit
   * @param int $pagination_page
   * @return array|mixed|object
   */
  public function get_subscriptions( $pagination_limit = 10, $pagination_page = 1 ) {
    return $this->_request_get_entries( $this->_api_end_point_product_subscriptions, $pagination_limit, $pagination_page, 'subscription' );
  }

  /**
   * @param $endpoint
   * @param int $pagination_limit
   * @param int $pagination_page
   * @param bool|string $response_item_inner_key
   * @return array
   */
  private function _request_get_entries( $endpoint, $pagination_limit = 10, $pagination_page = 1, $response_item_inner_key = false ) {
    if( $pagination_limit > 50 ) {
      $so_pagination_limit_current_page = $pagination_page;

      $response = [];

      for( $so_pagination_limit_start = 0; $so_pagination_limit_start <= $pagination_limit; $so_pagination_limit_start++ ) {
        $so_pagination_limit_response = $this->_request_get_entries( $endpoint, 50, $so_pagination_limit_current_page, $response_item_inner_key );

        if( empty( $so_pagination_limit_response ) )
          return $response;

        $response = array_merge( $response, $so_pagination_limit_response );

        if( count( $so_pagination_limit_response ) < 50 )
          return $response;

        $so_pagination_limit_current_page++;
      }

      return $response;
    }

    $response = Requests::get( $endpoint .'/?' . http_build_query( [
        'per_page' => $pagination_limit,
        'page'     => $pagination_page
      ] ), [ 'Accept' => 'application/json' ], $this->_request_information );

    if ( $response->success ) {
      $end_point_response = json_decode( $response->body, true );

      if( !is_array( $end_point_response ) )
        return [];

      if( $response_item_inner_key === false )
        return $end_point_response;

      $response = [];

      foreach( $end_point_response as $end_point_response_item )
        $response[] = $end_point_response_item[ $response_item_inner_key ];

      return $response;
    }

    return [];
  }

  /**
   * @param int $product_id
   * @return array|bool
   */
  public function get_product( $product_id ) {
    $response = Requests::get( $this->_api_end_point_products .'/' . intval( $product_id ), [ 'Accept' => 'application/json' ], $this->_request_information );

    if ( $response->success ) {
      $response = json_decode( $response->body, true );

      return ( is_array( $response ) ? $response : [] );
    }

    return false;
  }

}