Easy Digital Download Automatic class.

EDD Software License Activating Class

<?php
/**
 * Created by PhpStorm.
 * User: apurbapodder
 * Date: 11/9/20
 * Time: 2:56 PM
 */


class BDS_License_For_PPU {

	private $bds_store_url;
	private $bds_product_id;
	private $bds_product_name;
	private $bds_license_page_slug;
	private $parent_page_slug;
	private $bds_license_field_key;


	public function __construct(
		$parent_page_slug = null,
		$bds_store_url,
		$bds_product_id,
		$bds_product_name,
		$bds_license_page_slug,
		$bds_plugin_version,
		$bds_plugin_main_file
	) {

		if ( $parent_page_slug !== null ) {
			$this->parent_page_slug = $parent_page_slug;
			$this->bds_license_page_slug = $bds_license_page_slug;
			$this->bds_product_id = $bds_product_id;
			$this->bds_product_name = $bds_product_name;
			$this->bds_store_url = $bds_store_url;
			$this->bds_plugin_version = $bds_plugin_version;
			$this->bds_license_field_key = $bds_license_page_slug . '_key';
			$this->bds_license_status = $bds_license_page_slug . '_status';
			$this->bds_plugin_main_file = $bds_plugin_main_file;
			add_action( 'admin_menu', array( $this, 'bds_license_page' ) );
			add_action( 'init', array( $this, 'bds_plugin_updater' ) );
			add_action( 'admin_init', array( $this, 'bds_license_register_option' ) );
			add_action( 'admin_init', array( $this,'bds_activate_license' ));
			add_action( 'admin_init', array( $this,'bds_deactivate_license' ));
			add_action( 'admin_notices', array( $this, 'bds_license_admin_notices' ) );

		}

	}


	/************************************
	 * this illustrates how to activate
	 * a license key
	 *************************************/

	function bds_activate_license() {

		// listen for our activate button to be clicked
		if ( isset( $_POST['bds_license_activate'] ) ) {

			// run a quick security check
			if ( ! check_admin_referer( 'bds_license_nonce', 'bds_license_nonce' ) ) {
				return;
			} // get out if we didn't click the Activate button

			// retrieve the license from the database
			$license = trim( get_option( $this->bds_license_field_key ) );


			// data to send in our API request
			$api_params = array(
				'edd_action' => 'activate_license',
				'license'    => $license,
				'item_name'  => urlencode( $this->bds_product_name ), // the name of our product in EDD
				'url'        => home_url(),
			);

			// Call the custom API.
			$response = wp_remote_post( $this->bds_store_url,
				array( 'timeout' => 15, 'sslverify' => false, 'body' => $api_params ) );

			// make sure the response came back okay
			if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {

				if ( is_wp_error( $response ) ) {
					$message = $response->get_error_message();
				} else {
					$message = __( 'An error occurred, please try again.' );
				}

			} else {

				$license_data = json_decode( wp_remote_retrieve_body( $response ) );

				if ( false === $license_data->success ) {

					switch ( $license_data->error ) {

						case 'expired' :

							$message = sprintf(
								__( 'Your license key expired on %s.' ),
								date_i18n( get_option( 'date_format' ),
									strtotime( $license_data->expires, current_time( 'timestamp' ) ) )
							);
							break;

						case 'disabled' :
						case 'revoked' :

							$message = __( 'Your license key has been disabled.' );
							break;

						case 'missing' :

							$message = __( 'Invalid license.' );
							break;

						case 'invalid' :
						case 'site_inactive' :

							$message = __( 'Your license is not active for this URL.' );
							break;

						case 'item_name_mismatch' :

							$message = sprintf( __( 'This appears to be an invalid license key for %s.' ),
								$this->bds_product_name );
							break;

						case 'no_activations_left':

							$message = __( 'Your license key has reached its activation limit.' );
							break;

						default :

							$message = __( 'An error occurred, please try again.' );
							break;
					}

				}

			}

			// Check if anything passed on a message constituting a failure
			if ( ! empty( $message ) ) {
				$base_url = admin_url( 'admin.php?page=' . $this->bds_license_page_slug );
				$redirect = add_query_arg( array( 'sl_activation' => 'false', 'message' => urlencode( $message ) ),
					$base_url );

				wp_redirect( $redirect );
				exit();
			}

			// $license_data->license will be either "valid" or "invalid"

			update_option( $this->bds_license_status, $license_data->license );
			wp_redirect( admin_url( 'admin.php?page=' . $this->bds_license_page_slug ) );
			exit();
		}
	}


	/***********************************************
	 * Illustrates how to deactivate a license key.
	 * This will decrease the site count
	 ***********************************************/

	function bds_deactivate_license() {

		// listen for our activate button to be clicked
		if ( isset( $_POST['bds_license_deactivate'] ) ) {

			// run a quick security check
			if ( ! check_admin_referer( 'bds_license_nonce', 'bds_license_nonce' ) ) {
				return;
			} // get out if we didn't click the Activate button

			// retrieve the license from the database
			$license = trim( get_option( $this->bds_license_field_key ) );



			// data to send in our API request
			$api_params = array(
				'edd_action' => 'deactivate_license',
				'license'    => $license,
				'item_name'  => urlencode( $this->bds_product_name ), // the name of our product in EDD
				'url'        => home_url(),
			);

			// Call the custom API.
			$response = wp_remote_post( $this->bds_store_url,
				array( 'timeout' => 15, 'sslverify' => false, 'body' => $api_params ) );

			// make sure the response came back okay
			if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {

				if ( is_wp_error( $response ) ) {
					$message = $response->get_error_message();
				} else {
					$message = __( 'An error occurred, please try again.' );
				}

				$base_url = admin_url( 'admin.php?page=' . $this->bds_license_page_slug );
				$redirect = add_query_arg( array( 'sl_activation' => 'false', 'message' => urlencode( $message ) ),
					$base_url );

				wp_redirect( $redirect );
				exit();
			}



			// decode the license data
			$license_data = json_decode( wp_remote_retrieve_body( $response ) );


			// $license_data->license will be either "deactivated" or "failed"
			if ( $license_data->license == 'deactivated' ) {
				delete_option( $this->bds_license_status );
			}

			wp_redirect( admin_url( 'admin.php?page=' . $this->bds_license_page_slug ) );
			exit();

		}
	}


	/************************************
	 * this illustrates how to check if
	 * a license key is still valid
	 * the updater does this for you,
	 * so this is only needed if you
	 * want to do something custom
	 *************************************/

	function bds_check_license() {

		global $wp_version;

		$license = trim( get_option( $this->bds_license_field_key ) );

		$api_params = array(
			'edd_action' => 'check_license',
			'license'    => $license,
			'item_name'  => urlencode( $this->bds_product_name ),
			'url'        => home_url(),
		);

		// Call the custom API.
		$response = wp_remote_post( $this->bds_store_url,
			array( 'timeout' => 15, 'sslverify' => false, 'body' => $api_params ) );

		if ( is_wp_error( $response ) ) {
			return false;
		}

		$license_data = json_decode( wp_remote_retrieve_body( $response ) );

		if ( $license_data->license == 'valid' ) {
		    return true;
			// this license is still valid
		} else {
			return false;
			// this license is no longer valid
		}
	}

	/**
	 * This is a means of catching errors from the activation method above and displaying it to the customer
	 */
	function bds_license_admin_notices() {

	    if(!$this->bds_check_license()){

		    ?>
            <div class="error">
                <p><?php echo "Please <a href=".admin_url( 'admin.php?page=' . $this->bds_license_page_slug ).">Activate</a> $this->bds_product_name License to get Critical Update Notice"; ?></p>
            </div>
            <?php
        }

		if ( isset( $_GET['sl_activation'] ) && ! empty( $_GET['message'] ) ) {

			switch ( $_GET['sl_activation'] ) {

				case 'false':
					$message = urldecode( $_GET['message'] );
					?>
                    <div class="error">
                        <p><?php echo $message; ?></p>
                    </div>
					<?php
					break;

				case 'true':
				default:
				?>
                <div class="success">
                    <p><?php echo 'License has been activated successfully' ?></p>
                </div>

                <?php
					break;

			}
		}
	}


	function bds_license_register_option() {
		// creates our settings in the options table
		register_setting( $this->bds_license_page_slug, $this->bds_license_field_key, 'bds_sanitize_license' );
	}

	function bds_sanitize_license( $new ) {
		$old = get_option( $this->bds_license_field_key );
		if ( $old && $old != $new ) {
			delete_option( $this->bds_license_status ); // new license has been entered, so must reactivate
		}

		return $new;
	}

	/**
	 * Initialize the updater. Hooked into `init` to work with the
	 * wp_version_check cron job, which allows auto-updates.
	 */
	function bds_plugin_updater() {

		// To support auto-updates, this needs to run during the wp_version_check cron job for privileged users.
		$doing_cron = defined( 'DOING_CRON' ) && DOING_CRON;
		if ( ! current_user_can( 'manage_options' ) && ! $doing_cron ) {
			return;
		}

		// retrieve our license key from the DB
		$license_key = trim( get_option( $this->bds_license_field_key ) );

		// setup the updater
		$bds_updater = new BDS_SL_Plugin_Updater( $this->bds_store_url, $this->bds_plugin_main_file,
			array(
				'version' => $this->bds_plugin_version,                    // current version number
				'license' => $license_key,             // license key (used get_option above to retrieve from DB)
				'item_id' => $this->bds_product_id,       // ID of the product
				'author'  => 'Apurba', // author of this plugin
				'beta'    => false,
			)
		);

	}

	public function bds_license_page() {
		add_submenu_page( $this->parent_page_slug,
			$this->bds_product_name,
			$this->bds_product_name,
			'manage_options',
			$this->bds_license_page_slug,
			array(
				$this,
				'bds_license_page_cb',
			) );
	}

	public function bds_license_page_cb() {
		$license = get_option( $this->bds_license_field_key );
		$status  = get_option( $this->bds_license_status );

		?>
        <div class="wrap">
        <h2><?php _e( 'Plugin License Options' ); ?></h2>
        <form method="post" action="options.php">

			<?php settings_fields( $this->bds_license_page_slug ); ?>

            <table class="form-table">
                <tbody>
                <tr valign="top">
                    <th scope="row" valign="top">
						<?php _e( 'License Key' ); ?>
                    </th>
                    <td>
                        <input id="<?php echo $this->bds_license_field_key ?>"
                               name="<?php echo $this->bds_license_field_key ?>" type="text"
                               class="regular-text" value="<?php esc_attr_e( $license ); ?>"/>
                        <label class="description"
                               for="<?php echo $this->bds_license_field_key ?>"><?php _e( 'Enter your license key' ); ?></label>
                    </td>
                </tr>
				<?php if ( false !== $license ) { ?>
                    <tr valign="top">
                        <th scope="row" valign="top">
							<?php _e( 'Activate License' ); ?>
                        </th>
                        <td>
							<?php if ( $status !== false && $status == 'valid' ) { ?>
                                <span style="color:green;"><?php _e( 'active' ); ?></span>
								<?php wp_nonce_field( 'bds_license_nonce', 'bds_license_nonce' ); ?>
                                <input type="submit" class="button-secondary" name="bds_license_deactivate"
                                       value="<?php _e( 'Deactivate License' ); ?>"/>
							<?php } else {
								wp_nonce_field( 'bds_license_nonce', 'bds_license_nonce' ); ?>
                                <input type="submit" class="button-secondary" name="bds_license_activate"
                                       value="<?php _e( 'Activate License' ); ?>"/>
							<?php } ?>
                        </td>
                    </tr>
				<?php } ?>
                </tbody>
            </table>
			<?php submit_button(); ?>

        </form>
		<?php
	}

}

CONST BDS_STORE_URL = 'https://bestdecoders.com/';

CONST BDS_PRODUCT_ID = 195;

CONST BDS_PRODUCT_NAME = 'Price Per Unit Pro';

CONST BDS_PLUGIN_LICENSE_PAGE = 'price-per-unit-lincense';

//Activate License Process
New BDS_License_For_PPU('bds_plugin',self::BDS_STORE_URL,self::BDS_PRODUCT_ID,self::BDS_PRODUCT_NAME,self::BDS_PLUGIN_LICENSE_PAGE,$this->version,plugin_dir_path( dirname( FILE ) ).'price-per-unit-pro-for-woocommerce.php');