cx-newsletter/templates/16-plugin_worker.php

<?php

namespace cx_newsletter;
use \wpdb;

abstract class plugin_worker 
implements plugin_worker_interface {
    public function __construct(
        settings $settings,
        database_versions_manager $versions,
        table_names_generator $tables,
        wpdb $database
    ) {
        $this->settings = $settings;
        $this->tables = $tables;
        $this->database = $database;
        $this->versions = $versions;
    }

    protected function get_settings() : settings {
        return $this->settings;
    }

    protected function get_tables() : table_names_generator { 
        return $this->tables;
    }

    protected function get_database() : wpdb {
        return $this->database;
    }

    protected function get_versions() : database_versions_manager {
        return $this->versions;
    }

    private database_versions_manager $versions;
    private settings $settings;
    private wpdb $database;
    private table_names_generator $tables;
}