Loader.php

<?php
/**
 * @package Redbit\SimpleShop\WpPlugin
 * @license MIT
 * @copyright 2016-2018 Redbit s.r.o.
 * @author Redbit s.r.o. <info@simpleshop.cz>
 */

namespace Redbit\SimpleShop\WpPlugin;

class Loader {
	/**
	 * @var string
	 */
	private $secure_key;
	/**
	 * @var string
	 */
	private $email;

	/**
	 * @var Settings
	 */
	private $settings;

	/**
	 * @var Access
	 */
	private $access;

	public function __construct() {
		$this->init();
		$this->init_i18n();

		$this->secure_key = $this->load_api_key();
		$this->email      = $this->load_email();

		add_action( 'tgmpa_register', [ $this, 'register_required_plugins' ] );
		register_activation_hook( __FILE__, [ $this, 'ssc_activation_hook' ] );
	}

	private function init() {
		$this->settings = new Settings( $this );
		$this->access   = new Access( $this->settings );

		new Admin( $this );
		new Rest( $this );
		new Cron( $this );
		new Metaboxes( $this );
		new Shortcodes();
	}

	public function generate_secure_key() {
		return bin2hex( random_bytes( 22 ) );
	}

	public function save_secure_key( $key ) {
		update_option( 'ssc_secure_key', $key );
	}

	public function has_credentials() {
		return $this->email && $this->secure_key;
	}

	protected function load_email() {
		return $this->settings->ssc_get_option( 'ssc_api_email' );
	}

	public function get_api_email() {
		return $this->email;
	}

	protected function load_api_key() {
		return $this->settings->ssc_get_option( 'ssc_api_key' );
	}

	public function get_api_key() {
		return $this->secure_key;
	}

	public function validate_secure_key( $key_to_validate ) {
		return $key_to_validate == sha1( $this->secure_key );
	}

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

	public function get_access() {
		return $this->access;
	}

	/**
	 * Register the required plugins for this plugin.
	 */
	public function register_required_plugins() {
		global $wp_version;
		if ( $wp_version < '4.7' ) {
			$plugins = [
				[
					'name'     => 'Wordpress Rest API',
					'slug'     => 'rest-api',
					'required' => true,
				]
			];

			$config = [
				'id'           => 'ssc',
				'default_path' => '',
				'menu'         => 'ssc-install-plugins',
				'parent_slug'  => 'tools.php',
				'capability'   => 'edit_theme_options',
				'has_notices'  => true,
				'dismissable'  => true,
				'dismiss_msg'  => '',
				'is_automatic' => false,
				'message'      => '',
			];

			tgmpa( $plugins, $config );
		}
	}

	public function get_post_types() {
		$args = [
			'public' => true
		];

		return get_post_types( $args );
	}


	public function ssc_activation_hook() {
		if ( ! function_exists( 'curl_init' ) || ! function_exists( 'random_bytes' ) ) {
			echo '<h3>' . __( 'Plugin activation failed. Please contact your provider and ask to install PHP extensions: cUrl and Mcrypt.',
					'simpleshop-cz' ) . '</h3>';

			//Adding @ before will prevent XDebug output
			@trigger_error( __( 'Plugin activation failed. Please contact your provider and ask to install PHP extensions: cUrl and Mcrypt.',
				'simpleshop-cz' ), E_USER_ERROR );
		}

		// Generate and save the secure key$this = new Loader();
		$key = $this->generate_secure_key();
		$this->save_secure_key( $key );
	}

	public function init_i18n() {
		add_action( 'plugins_loaded', [ $this, 'load_textdomain_i18n' ] );
	}

	public function load_textdomain_i18n() {
		$plugin_rel_path = str_replace( WP_PLUGIN_DIR . '/', '', SIMPLESHOP_PLUGIN_DIR . 'languages/' );
		load_plugin_textdomain( 'simpleshop-cz', false, $plugin_rel_path );
	}
}