File plugin-updates/EDD_BOOK_Plugin

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<?php

// uncomment this line for testing
//set_site_transient( 'update_plugins', null );

/**
 * Allows plugins to use their own update API.
 *
 * @author Ashok Rane
 * @version 4.7.0
 */
class EDD_BOOK_Plugin_Updater {
    private $api_url  = 'http://www.tychesoftwares.com/';
    private $api_data = array();
    private $name     = 'Booking & Appointment Plugin for WooCommerce';
    private $slug     = 'woocommerce-booking';

    /**
     * Class constructor.
     *
     * @uses plugin_basename()
     * @uses hook()
     *
     * @param string $_api_url The URL pointing to the custom API endpoint.
     * @param string $_plugin_file Path to the plugin file.
     * @param array $_api_data Optional data to send with API calls.
     * @return void
     */
    function __construct( $_api_url, $_plugin_file, $_api_data = null ) {
        $this->api_url  = trailingslashit( $_api_url );
        $this->api_data = urlencode_deep( $_api_data );
        $this->name     = plugin_basename( $_plugin_file );
        $this->slug     = basename( $_plugin_file, '.php');
        $this->version  = $_api_data['version'];

        // Set up hooks.
        $this->hook();
    }

    /**
     * Set up Wordpress filters to hook into WP's update process.
     *
     * @uses add_filter()
     *
     * @return void
     */
    private function hook() {
        add_filter( 'pre_set_site_transient_update_plugins', array( $this, 'pre_set_site_transient_update_plugins_filter' ) );
        add_filter( 'plugins_api', array( $this, 'plugins_api_filter' ), 10, 3 );
    }

    /**
     * Check for Updates at the defined API endpoint and modify the update array.
     *
     * This function dives into the update api just when Wordpress creates its update array,
     * then adds a custom API call and injects the custom plugin data retrieved from the API.
     * It is reassembled from parts of the native Wordpress plugin update code.
     * See wp-includes/update.php line 121 for the original wp_update_plugins() function.
     *
     * @uses api_request()
     *
     * @param array $_transient_data Update array build by Wordpress.
     * @return array Modified update array with custom plugin data.
     */
    function pre_set_site_transient_update_plugins_filter( $_transient_data ) {

        $license_status = get_option ('edd_sample_license_status');
         
        if ( isset ( $license_status) && $license_status == 'valid' ) {
            
           if( empty( $_transient_data ) ) return $_transient_data;
    
            $to_send = array( 'slug' => $this->slug );
    
            $api_response = $this->api_request( 'plugin_latest_version', $to_send );
    
            if( false !== $api_response && is_object( $api_response ) && isset( $api_response->new_version ) ) {
                if( version_compare( $this->version, $api_response->new_version, '<' ) )
                    $_transient_data->response[$this->name] = $api_response;
                }
            }
            return $_transient_data;
        }


    /**
     * Updates information on the "View version x.x details" page with custom data.
     *
     * @uses api_request()
     *
     * @param mixed $_data
     * @param string $_action
     * @param object $_args
     * @return object $_data
     */
    function plugins_api_filter( $_data, $_action = '', $_args = null ) {
        if ( ( $_action != 'plugin_information' ) || !isset( $_args->slug ) || ( $_args->slug != $this->slug ) ) return $_data;

        $to_send = array( 'slug' => $this->slug );

        $api_response = $this->api_request( 'plugin_information', $to_send );
        if ( false !== $api_response ) $_data = $api_response;

        return $_data;
    }

    /**
     * Calls the API and, if successfull, returns the object delivered by the API.
     *
     * @uses get_bloginfo()
     * @uses wp_remote_post()
     * @uses is_wp_error()
     *
     * @param string $_action The requested action.
     * @param array $_data Parameters for the API action.
     * @return false||object
     */
    private function api_request( $_action, $_data ) {

        global $wp_version;

        $data = array_merge( $this->api_data, $_data );

        if( $data['slug'] != $this->slug )
            return;

        if( empty( $data['license'] ) )
            return;

        $api_params = array(
            'edd_action'    => 'get_version',
            'license'       => $data['license'],
            'name'          => $data['item_name'],
            'slug'          => $this->slug,
            'author'        => $data['author']
        );
        $request = wp_remote_post( $this->api_url, array( 'timeout' => 15, 'sslverify' => false, 'body' => $api_params ) );

        if ( ! is_wp_error( $request ) ):
            $request = json_decode( wp_remote_retrieve_body( $request ) );
            if( $request && isset( $request->sections ) )
                $request->sections = maybe_unserialize( $request->sections );
            return $request;
        else:
            return false;
        endif;
    }
}

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