dw-sheet-data-checker/includes/class-Checker.php

<?php

defined( 'ABSPATH' ) || exit;

class UPDATE_CHECKER extends SHEET_DATA_CHECKER_PRO{

    public $plugin_slug;
    public $version;
    public $cache_key;
    public $cache_allowed;

    /**
     * Returns an instance of this class. 
     */
    public static function get_instance() {

        return self::$instance;

    }

    public function __construct() {

        $this->plugin_slug = SHEET_CHECKER_PRO_DOMAIN;
        $this->version = SHEET_CHECKER_PRO_VERSION;
        $this->cache_key = SHEET_CHECKER_PRO_DOMAIN.'_update_checker';
        $this->cache_allowed = false;

        add_filter( 'plugins_api', array( $this, 'info' ), 20, 3 );
        add_filter( 'site_transient_update_plugins', array( $this, 'update' ) );
        add_action( 'upgrader_process_complete', array( $this, 'purge' ), 10, 2 );

        // add_action( 'wp_head' , [$this, 'header']);

    }

    public function header() {
        $remote = wp_remote_get(
            'https://member.dwindi.com/wp-content/uploads/updater/info.json?product='.SHEET_CHECKER_PRO_DOMAIN,
            array(
                'timeout' => 10,
                'headers' => array(
                    'Accept' => 'application/json'
                )
            )
        );
        // $remote = json_decode( wp_remote_retrieve_body( $remote ) );
        echo '<pre>';
        print_r($remote);
        echo '</pre>';
    }

    public function request(){

        $remote = get_transient( $this->cache_key );

        if( false === $remote || ! $this->cache_allowed ) {

            $remote = wp_remote_get(
                'https://member.dwindi.com/wp-content/uploads/updater/info.json',
                array(
                    'timeout' => 10,
                    'headers' => array(
                        'Accept' => 'application/json'
                    )
                )
            );

            if(
                is_wp_error( $remote )
                || 200 !== wp_remote_retrieve_response_code( $remote )
                || empty( wp_remote_retrieve_body( $remote ) )
            ) {
                return false;
            }

            set_transient( $this->cache_key, $remote, DAY_IN_SECONDS );

        }

        $remote = json_decode( wp_remote_retrieve_body( $remote ) );

        return $remote;

    }


    function info( $res, $action, $args ) {

        // print_r( $action );
        // print_r( $args );

        // do nothing if you're not getting plugin information right now
        if( 'plugin_information' !== $action ) {
            return $res;
        }

        // do nothing if it is not our plugin
        if( $this->plugin_slug !== $args->slug ) {
            return $res;
        }

        // get updates
        $remote = $this->request();

        if( ! $remote ) {
            return $res;
        }

        $res = new stdClass();

        $res->name = $remote->name;
        $res->slug = $remote->slug;
        $res->version = $remote->version;
        $res->tested = $remote->tested;
        $res->requires = $remote->requires;
        $res->author = $remote->author;
        $res->download_link = $remote->download_url;
        $res->trunk = $remote->download_url;
        $res->requires_php = $remote->requires_php;
        $res->last_updated = $remote->last_updated;

        $res->sections = array(
            'description' => $remote->sections->description,
            'installation' => $remote->sections->installation,
            'changelog' => $remote->sections->changelog
        );

        if( ! empty( $remote->banners ) ) {
            $res->banners = array(
                'low' => $remote->banners->low,
                'high' => $remote->banners->high
            );
        }

        return $res;

    }

    public function update( $transient ) {

        if ( empty($transient->checked ) ) {
            return $transient;
        }

        $remote = $this->request();

        if(
            $remote
            && version_compare( $this->version, $remote->version, '<' )
            && version_compare( $remote->requires, get_bloginfo( 'version' ), '<=' )
            && version_compare( $remote->requires_php, PHP_VERSION, '<' )
        ) {
            $res = new stdClass();
            $res->slug = $this->plugin_slug;
            $res->plugin = SHEET_CHECKER_PRO_DOMAIN.'/'.SHEET_CHECKER_PRO_DOMAIN.'.php'; // misha-update-plugin/misha-update-plugin.php
            $res->new_version = $remote->version;
            $res->tested = $remote->tested;
            $res->package = $remote->download_url;

            $transient->response[ $res->plugin ] = $res;

    }

        return $transient;

    }

    public function purge( $upgrader, $options ){

        if (
            $this->cache_allowed
            && 'update' === $options['action']
            && 'plugin' === $options[ 'type' ]
        ) {
            // just clean the cache when new plugin version is installed
            delete_transient( $this->cache_key );
        }

    }


}