File "SetupWizard.php"

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<?php

namespace EasyWPSMTP\Admin;

use EasyWPSMTP\Admin\Pages\TestTab;
use EasyWPSMTP\Connect;
use EasyWPSMTP\Options;
use EasyWPSMTP\UsageTracking\UsageTracking;
use EasyWPSMTP\WP;
use EasyWPSMTP\Reports\Emails\Summary as SummaryReportEmail;
use EasyWPSMTP\Tasks\Reports\SummaryEmailTask as SummaryReportEmailTask;

/**
 * Class for the plugin's Setup Wizard.
 *
 * @since 2.1.0
 */
class SetupWizard {

	/**
	 * The WP Option key for storing setup wizard stats.
	 *
	 * @since 2.1.0
	 */
	const STATS_OPTION_KEY = 'easy_wp_smtp_setup_wizard_stats';

	/**
	 * Run all the hooks needed for the Setup Wizard.
	 *
	 * @since 2.1.0
	 */
	public function hooks() {

		add_action( 'admin_init', [ $this, 'maybe_load_wizard' ] );
		add_action( 'admin_init', [ $this, 'maybe_redirect_after_activation' ], 9999 );
		add_action( 'admin_menu', [ $this, 'add_dashboard_page' ], 20 );
		add_filter( 'removable_query_args', [ $this, 'maybe_disable_automatic_query_args_removal' ] );

		// API AJAX callbacks.
		add_action( 'wp_ajax_easy_wp_smtp_vue_wizard_steps_started', [ $this, 'wizard_steps_started' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_get_settings', [ $this, 'get_settings' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_update_settings', [ $this, 'update_settings' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_get_oauth_url', [ $this, 'get_oauth_url' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_remove_oauth_connection', [ $this, 'remove_oauth_connection' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_install_plugin', [ $this, 'install_plugin' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_get_partner_plugins_info', [ $this, 'get_partner_plugins_info' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_subscribe_to_newsletter', [ $this, 'subscribe_to_newsletter' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_upgrade_plugin', [ $this, 'upgrade_plugin' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_check_mailer_configuration', [ $this, 'check_mailer_configuration' ] );
		add_action( 'wp_ajax_easy_wp_smtp_vue_send_feedback', [ $this, 'send_feedback' ] );
	}

	/**
	 * Get the URL of the Setup Wizard page.
	 *
	 * @since 2.1.0
	 *
	 * @return string
	 */
	public static function get_site_url() {

		return easy_wp_smtp()->get_admin()->get_admin_page_url() . '-setup-wizard';
	}

	/**
	 * Checks if the Wizard should be loaded in current context.
	 *
	 * @since 2.1.0
	 */
	public function maybe_load_wizard() {

		// Check for wizard-specific parameter
		// Allow plugins to disable the setup wizard
		// Check if current user is allowed to save settings.
		if (
			! (
				isset( $_GET['page'] ) && // phpcs:ignore WordPress.Security.NonceVerification.Recommended
				Area::SLUG . '-setup-wizard' === $_GET['page'] && // phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$this->should_setup_wizard_load() &&
				current_user_can( 'manage_options' )
			)
		) {
			return;
		}

		// Don't load the interface if doing an ajax call.
		if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
			return;
		}

		set_current_screen();

		// Remove an action in the Gutenberg plugin ( not core Gutenberg ) which throws an error.
		remove_action( 'admin_print_styles', 'gutenberg_block_editor_admin_print_styles' );

		$this->load_setup_wizard();
	}

	/**
	 * Maybe redirect to the setup wizard after plugin activation on a new install.
	 *
	 * @since 2.1.0
	 */
	public function maybe_redirect_after_activation() { // phpcs:ignore Generic.Metrics.CyclomaticComplexity.TooHigh

		if ( wp_doing_ajax() || wp_doing_cron() ) {
			return;
		}

		// Check if we should consider redirection.
		if ( ! get_transient( 'easy_wp_smtp_activation_redirect' ) ) {
			return;
		}

		delete_transient( 'easy_wp_smtp_activation_redirect' );

		// Check option to disable setup wizard redirect.
		if ( get_option( 'easy_wp_smtp_activation_prevent_redirect' ) ) {
			return;
		}

		// Only do this for single site installs.
		if ( isset( $_GET['activate-multi'] ) || is_network_admin() ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return;
		}

		// Don't redirect if the Setup Wizard is disabled.
		if ( ! $this->should_setup_wizard_load() ) {
			return;
		}

		// Initial install.
		if ( get_option( 'easy_wp_smtp_initial_version' ) === EasyWPSMTP_PLUGIN_VERSION ) {
			update_option( 'easy_wp_smtp_activation_prevent_redirect', true );
			wp_safe_redirect( self::get_site_url() );
			exit;
		}
	}

	/**
	 * Register page through WordPress's hooks.
	 *
	 * Create a dummy admin page, where the Setup Wizard app can be displayed,
	 * but it's not visible in the admin dashboard menu.
	 *
	 * @since 2.1.0
	 */
	public function add_dashboard_page() {

		if ( ! $this->should_setup_wizard_load() ) {
			return;
		}

		add_submenu_page( '', '', '', 'manage_options', Area::SLUG . '-setup-wizard', '' );
	}

	/**
	 * Load the Setup Wizard template.
	 *
	 * @since 2.1.0
	 */
	private function load_setup_wizard() {

		/**
		 * Before setup wizard load.
		 *
		 * @since 2.1.0
		 *
		 * @param \EasyWPSMTP\Admin\SetupWizard  $setup_wizard SetupWizard instance.
		 */
		do_action( 'easy_wp_smtp_admin_setup_wizard_load_setup_wizard_before', $this );

		$this->enqueue_scripts();

		$this->setup_wizard_header();
		$this->setup_wizard_content();
		$this->setup_wizard_footer();

		/**
		 * After setup wizard load.
		 *
		 * @since 2.1.0
		 *
		 * @param \EasyWPSMTP\Admin\SetupWizard  $setup_wizard SetupWizard instance.
		 */
		do_action( 'easy_wp_smtp_admin_setup_wizard_load_setup_wizard_after', $this );

		exit;
	}

	/**
	 * Load the scripts needed for the Setup Wizard.
	 *
	 * @since 2.1.0
	 */
	public function enqueue_scripts() {

		if ( ! defined( 'EasyWPSMTP_VUE_LOCAL_DEV' ) || ! EasyWPSMTP_VUE_LOCAL_DEV ) {
			$rtl = is_rtl() ? '.rtl' : '';
			wp_enqueue_style( 'easy-wp-smtp-vue-style', easy_wp_smtp()->assets_url . '/vue/css/wizard' . $rtl . '.min.css', [], EasyWPSMTP_PLUGIN_VERSION );
		}

		wp_enqueue_script( 'easy-wp-smtp-vue-vendors', easy_wp_smtp()->assets_url . '/vue/js/chunk-vendors.min.js', [], EasyWPSMTP_PLUGIN_VERSION, true );
		wp_enqueue_script( 'easy-wp-smtp-vue-script', easy_wp_smtp()->assets_url . '/vue/js/wizard.min.js', [ 'easy-wp-smtp-vue-vendors' ], EasyWPSMTP_PLUGIN_VERSION, true );

		wp_localize_script(
			'easy-wp-smtp-vue-script',
			'easy_wp_smtp_vue',
			[
				'ajax_url'           => admin_url( 'admin-ajax.php' ),
				'nonce'              => wp_create_nonce( 'easywpsmtp-admin-nonce' ),
				'is_multisite'       => is_multisite(),
				'translations'       => WP::get_jed_locale_data( 'easy-wp-smtp' ),
				'exit_url'           => easy_wp_smtp()->get_admin()->get_admin_page_url(),
				'email_test_tab_url' => add_query_arg( 'tab', 'test', easy_wp_smtp()->get_admin()->get_admin_page_url( Area::SLUG . '-tools' ) ),
				'is_pro'             => easy_wp_smtp()->is_pro(),
				'is_ssl'             => is_ssl(),
				'license_exists'     => apply_filters( 'easy_wp_smtp_admin_setup_wizard_license_exists', false ),
				'plugin_version'     => EasyWPSMTP_PLUGIN_VERSION,
				'mailer_options'     => $this->prepare_mailer_options(),
				'defined_constants'  => $this->prepare_defined_constants(),
				'upgrade_link'       => easy_wp_smtp()->get_upgrade_link( 'setup-wizard' ),
				'versions'           => $this->prepare_versions_data(),
				'public_url'         => easy_wp_smtp()->assets_url . '/vue/',
				'current_user_email' => wp_get_current_user()->user_email,
				'completed_time'     => self::get_stats()['completed_time'],
				'education'          => [
					'upgrade_text'        => esc_html__( 'Sorry, but the %mailer% mailer isn’t available in the lite version. Please upgrade to PRO to unlock this mailer and much more.', 'easy-wp-smtp' ),
					'upgrade_button'      => esc_html__( 'Upgrade to PRO', 'easy-wp-smtp' ),
					'upgrade_url'         => add_query_arg( 'discount', 'SMTPLITEUPGRADE', easy_wp_smtp()->get_upgrade_link( '' ) ),
					'upgrade_bonus_short' => sprintf(
						wp_kses( /* Translators: %s - discount value 50%. */
							__( '<b>%s OFF</b> for Easy WP SMTP users, applied at checkout.', 'easy-wp-smtp' ),
							[
								'b' => [],
							]
						),
						'50%'
					),
					'upgrade_bonus_long'  => sprintf(
						wp_kses( /* Translators: %s - discount value 50%. */
							__( 'You can upgrade to the Pro plan and <b>save %s today</b>, automatically applied at checkout.', 'easy-wp-smtp' ),
							[
								'b' => [],
							]
						),
						'50%'
					),
					'upgrade_doc'         => sprintf(
						'<a href="%1$s" target="_blank" rel="noopener noreferrer" class="already-purchased">%2$s</a>',
						// phpcs:ignore WordPress.Arrays.ArrayDeclarationSpacing.AssociativeArrayFound
						esc_url( easy_wp_smtp()->get_utm_url( 'https://easywpsmtp.com/docs/how-to-upgrade-easy-wp-smtp-to-pro-version/', [ 'medium' => 'setup-wizard', 'content' => 'Wizard Pro Mailer Popup - Already purchased' ] ) ),
						esc_html__( 'Already purchased?', 'easy-wp-smtp' )
					),
				],
			]
		);
	}

	/**
	 * Outputs the simplified header used for the Setup Wizard.
	 *
	 * @since 2.1.0
	 */
	public function setup_wizard_header() {
		?>
		<!DOCTYPE html>
		<html <?php language_attributes(); ?>>
		<head>
			<meta name="viewport" content="width=device-width"/>
			<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
			<title><?php esc_html_e( 'Easy WP SMTP &rsaquo; Setup Wizard', 'easy-wp-smtp' ); ?></title>
			<?php do_action( 'admin_print_styles' ); ?>
			<?php do_action( 'admin_print_scripts' ); ?>
			<?php do_action( 'admin_head' ); ?>
		</head>
		<body class="easy-wp-smtp-setup-wizard">
		<?php
	}

	/**
	 * Outputs the content of the current step.
	 *
	 * @since 2.1.0
	 */
	public function setup_wizard_content() {
		$admin_url = is_network_admin() ? network_admin_url() : admin_url();

		$this->settings_error_page( 'easy-wp-smtp-vue-setup-wizard', '<a href="' . $admin_url . '">' . esc_html__( 'Go back to the Dashboard', 'easy-wp-smtp' ) . '</a>' );
		$this->settings_inline_js();
	}

	/**
	 * Outputs the simplified footer used for the Setup Wizard.
	 *
	 * @since 2.1.0
	 */
	public function setup_wizard_footer() {
		?>
		<?php wp_print_scripts( 'easy-wp-smtp-vue-script' ); ?>
		</body>
		</html>
		<?php
	}

	/**
	 * Error page HTML
	 *
	 * @since 2.1.0
	 *
	 * @param string $id     The HTML ID attribute of the main container div.
	 * @param string $footer The centered footer content.
	 */
	private function settings_error_page( $id = 'easy-wp-smtp-vue-site-settings', $footer = '' ) {

		$inline_logo_image = 'data:image/svg+xml;base64,<svg width="300" height="54" viewBox="0 0 300 54" fill="none" xmlns="http://www.w3.org/2000/svg">
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<path d="M150.242 49.8932H157.582V48.0245H152.414V37.9402H150.242V49.8932Z" fill="#211F9A"/>
<path d="M157.752 47.4185C157.752 49.1356 159.132 50.0952 160.664 50.0952C162.617 50.0952 163.29 48.5801 163.273 48.5801H163.307C163.307 48.5801 163.273 48.8494 163.273 49.1861V49.8932H165.243V44.5228C165.243 42.3511 163.931 41.1053 161.674 41.1053C159.637 41.1053 158.307 42.1659 158.307 42.1659L159.115 43.6979C159.115 43.6979 160.243 42.873 161.472 42.873C162.415 42.873 163.122 43.2602 163.122 44.3882V44.506H162.836C161.439 44.506 157.752 44.6912 157.752 47.4185ZM159.907 47.3175C159.907 46.1221 161.674 45.9706 162.769 45.9706H163.139V46.1726C163.139 47.2164 162.331 48.4286 161.203 48.4286C160.327 48.4286 159.907 47.8899 159.907 47.3175Z" fill="#211F9A"/>
<path d="M165.802 52.8731C165.802 52.8731 166.56 53.4286 167.586 53.4286C168.883 53.4286 170.078 52.7552 170.684 51.1895L174.523 41.3073H172.182L170.499 46.2905C170.347 46.745 170.213 47.4185 170.213 47.4185H170.179C170.179 47.4185 170.028 46.7114 169.859 46.2568L168.058 41.3073H165.65L169.27 49.7585L168.95 50.5161C168.63 51.2737 168.058 51.6272 167.468 51.6272C166.981 51.6272 166.509 51.2737 166.509 51.2737L165.802 52.8731Z" fill="#211F9A"/>
<path d="M174.632 45.6003C174.632 48.0414 176.399 50.0952 179.244 50.0952C181.383 50.0952 182.696 48.8663 182.696 48.8663L181.871 47.3343C181.871 47.3343 180.776 48.277 179.396 48.277C178.117 48.277 176.955 47.5026 176.821 46.0043H182.746C182.746 46.0043 182.797 45.4319 182.797 45.1794C182.797 42.9067 181.467 41.1053 178.992 41.1053C176.433 41.1053 174.632 42.9571 174.632 45.6003ZM176.888 44.5397C177.09 43.4285 177.847 42.7551 178.942 42.7551C179.885 42.7551 180.608 43.378 180.642 44.5397H176.888Z" fill="#211F9A"/>
<path d="M184.054 49.8932H186.193V46.4925C186.193 45.9875 186.243 45.5161 186.378 45.0952C186.782 43.8158 187.809 43.2938 188.718 43.2938C189.004 43.2938 189.223 43.3275 189.223 43.3275V41.2232C189.223 41.2232 189.038 41.1895 188.835 41.1895C187.523 41.1895 186.496 42.1659 186.108 43.3949H186.075C186.075 43.3949 186.108 43.1086 186.108 42.7888V41.3073H184.054V49.8932Z" fill="#211F9A"/>
<path d="M194.714 53.2097H196.348V49.3881C196.348 48.9504 196.314 48.6474 196.314 48.6474H196.348C196.348 48.6474 197.088 50.0447 198.957 50.0447C201.18 50.0447 202.813 48.2938 202.813 45.5833C202.813 42.9403 201.365 41.1221 199.075 41.1221C196.937 41.1221 196.213 42.6709 196.213 42.6709H196.179C196.179 42.6709 196.213 42.3847 196.213 42.048V41.324H194.714V53.2097ZM196.297 45.617C196.297 43.4453 197.475 42.553 198.755 42.553C200.169 42.553 201.163 43.7483 201.163 45.6002C201.163 47.5362 200.052 48.6474 198.705 48.6474C197.139 48.6474 196.297 47.1322 196.297 45.617Z" fill="#5F5F76"/>
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</g>
<defs>
<clipPath id="clip0_680_7909">
<rect width="300" height="53.9749" fill="white"/>
</clipPath>
</defs>
</svg>
';

		if ( ! easy_wp_smtp()->is_pro() ) {
			$contact_url = 'https://wordpress.org/support/plugin/easy-wp-smtp/';
		} else {
			// phpcs:ignore WordPress.Arrays.ArrayDeclarationSpacing.AssociativeArrayFound
			$contact_url = esc_url( easy_wp_smtp()->get_utm_url( 'https://easywpsmtp.com/contact/', [ 'medium' => 'setup-wizard', 'content' => 'Contact Us' ] ) );
		}

		?>
		<style type="text/css">
			#easy-wp-smtp-settings-area {
				visibility: hidden;
				animation: loadEasyWPSMTPSettingsNoJSView 0s 2s forwards;
			}

			@keyframes loadEasyWPSMTPSettingsNoJSView{
				to { visibility: visible; }
			}

			body {
				background: #F2F2F4;
				font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
				margin: 0;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-setup-wizard-header {
				text-align: center;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-setup-wizard-header h1 {
				margin: 0;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-logo {
				display: inline-block;
				width: 300px;
				margin-top: 10px;
				padding: 0 10px;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-logo img {
				width: 100%;
				height: 100%;
			}

			#easy-wp-smtp-settings-error-loading-area {
				box-sizing: border-box;
				max-width: 90%;
				width: auto;
				margin: 0 auto;
				background: #fff;
				border: 1px solid #DADADF;
				box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
				padding: 20px 30px;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-error-footer {
				text-align: center;
				margin-top: 20px;
				margin-bottom: 20px;
				font-size: 14px;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-error-footer a {
				color: #6F6F84;
				transition: 0.1s;
			}

			#easy-wp-smtp-settings-area .easy-wp-smtp-error-footer a:hover {
				color: #3A3A56;
			}

			#easy-wp-smtp-error-js h3 {
				font-weight: 500;
				font-size: 24px;
				line-height: 22px;
				margin: 0 0 15px;
				color: #09092C;
			}

			#easy-wp-smtp-error-js p.info,
			#easy-wp-smtp-error-js ul.info {
				color: #3A3A56;
				font-size: 16px;
				line-height: 24px;
				margin: 0 0 10px;
			}

			#easy-wp-smtp-error-js ul.info {
				margin: -10px 0 20px;
			}

			#easy-wp-smtp-error-js a.button {
				display: inline-block;
				background-color: #211FA6;
				color: #ffffff;
				padding: 12px 20px;
				font-size: 16px;
				line-height: 18px;
				border-radius: 4px;
				border: none;
				cursor: pointer;
				text-decoration: none;
				margin-top: 7px;
			}

			#easy-wp-smtp-error-js a.button:hover,
			#easy-wp-smtp-error-js a.button:active,
			#easy-wp-smtp-error-js a.button:focus {
				background-color: #15137A;
			}

			#easy-wp-smtp-error-js a.button:focus {
				box-shadow: 0 0 0 1px #ffffff, 0 0 0 3px #15137A;
			}

			#easy-wp-smtp-error-js .medium-bold {
				font-weight: 500;
			}

			#easy-wp-smtp-nojs-error-message > div {
				background: rgba(223, 42, 74, 0.05);
				border-left: 3px solid #DF2A4A;
				color: #42000C;
				font-weight: 400;
				font-size: 14px;
				line-height: 21px;
				padding: 15px;
				text-align: left;
			}

			@media (min-width: 782px) {
				#easy-wp-smtp-settings-area .easy-wp-smtp-logo {
					margin-top: 60px;
					padding: 0;
				}

				#easy-wp-smtp-settings-error-loading-area {
					width: 650px;
					margin-top: 50px;
					padding: 60px;
				}

				#easy-wp-smtp-settings-area .easy-wp-smtp-error-footer {
					margin-top: 50px;
					margin-bottom: 50px;
				}

				#easy-wp-smtp-error-js p.info {
					margin: 0 0 20px;
				}
			}
		</style>
		<!--[if IE]>
		<style>
			#easy-wp-smtp-settings-area{
				visibility: visible !important;
			}
		</style>
		<![endif]-->
		<div id="<?php echo esc_attr( $id ); ?>">
			<div id="easy-wp-smtp-settings-area" class="easy-wp-smtp-settings-area easywpsmtp-container">
				<header class="easy-wp-smtp-setup-wizard-header">
					<div class="easy-wp-smtp-logo">
						<img src="<?php echo esc_attr( $inline_logo_image ); ?>" alt="<?php esc_attr_e( 'Easy WP SMTP logo', 'easy-wp-smtp' ); ?>" class="easy-wp-smtp-logo-img">
					</div>
				</header>
				<div id="easy-wp-smtp-settings-error-loading-area-container">
					<div id="easy-wp-smtp-settings-error-loading-area">
						<div>
							<div id="easy-wp-smtp-error-js">
								<h3><?php esc_html_e( 'Whoops, something\'s not working.', 'easy-wp-smtp' ); ?></h3>
								<p class="info"><?php esc_html_e( 'It looks like something is preventing JavaScript from loading on your website. Easy WP SMTP requires JavaScript in order to give you the best possible experience.', 'easy-wp-smtp' ); ?></p>
								<p class="info">
									<?php esc_html_e( 'In order to fix this issue, please check each of the items below:', 'easy-wp-smtp' ); ?>
								</p>
								<ul class="info">
									<li><?php esc_html_e( 'If you are using an ad blocker, please disable it or whitelist the current page.', 'easy-wp-smtp' ); ?></li>
									<li><?php esc_html_e( 'If you aren\'t already using Chrome, Firefox, Safari, or Edge, then please try switching to one of these popular browsers.', 'easy-wp-smtp' ); ?></li>
									<li><?php esc_html_e( 'Confirm that your browser is updated to the latest version.', 'easy-wp-smtp' ); ?></li>
								</ul>
								<p class="info">
									<?php esc_html_e( 'If you\'ve checked each of these details and are still running into issues, then please get in touch with our support team. We’d be happy to help!', 'easy-wp-smtp' ); ?>
								</p>
								<div style="display: none;" id="easy-wp-smtp-nojs-error-message">
									<div>
										<strong style="font-weight: 500;" id="easy-wp-smtp-alert-message"></strong>
									</div>
									<p style="font-size: 14px;color: #6f6f84;padding-bottom: 15px;"><?php esc_html_e( 'Copy the error message above and paste it in a message to the Easy WP SMTP support team.', 'easy-wp-smtp' ); ?></p>
								</div>
								<a href="<?php echo esc_url( $contact_url ); ?>" target="_blank" class="button" rel="noopener noreferrer">
									<?php esc_html_e( 'Contact Us', 'easy-wp-smtp' ); ?>
								</a>
							</div>
						</div>
					</div>
					<div class="easy-wp-smtp-error-footer">
						<?php echo wp_kses_post( $footer ); ?>
					</div>
				</div>
			</div>
		</div>
		<?php
	}

	/**
	 * Attempt to catch the js error preventing the Vue app from loading and displaying that message for better support.
	 *
	 * @since 2.1.0
	 */
	private function settings_inline_js() {
		?>
		<script type="text/javascript">
			window.onerror = function myErrorHandler( errorMsg, url, lineNumber ) {
				/* Don't try to put error in container that no longer exists post-vue loading */
				var message_container = document.getElementById( 'easy-wp-smtp-nojs-error-message' );
				if ( ! message_container ) {
					return false;
				}
				var message = document.getElementById( 'easy-wp-smtp-alert-message' );
				message.innerHTML = errorMsg;
				message_container.style.display = 'block';
				return false;
			}
		</script>
		<?php
	}

	/**
	 * Ajax handler for retrieving the plugin settings.
	 *
	 * @since 2.1.0
	 */
	public function get_settings() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( esc_html__( 'You don\'t have permission to change options for this WP site!', 'easy-wp-smtp' ) );
		}

		$options = Options::init();

		wp_send_json_success( $options->get_all() );
	}

	/**
	 * Ajax handler for starting the Setup Wizard steps.
	 *
	 * @since 2.1.0
	 */
	public function wizard_steps_started() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( esc_html__( 'You don\'t have permission to change options for this WP site!', 'easy-wp-smtp' ) );
		}

		self::update_stats(
			[
				'launched_time' => time(),
			]
		);

		wp_send_json_success();
	}

	/**
	 * Ajax handler for updating the settings.
	 *
	 * @since 2.1.0
	 */
	public function update_settings() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error();
		}

		$options   = Options::init();
		$overwrite = ! empty( $_POST['overwrite'] );

		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$value = isset( $_POST['value'] ) ? wp_slash( json_decode( wp_unslash( $_POST['value'] ), true ) ) : [];

		// Cancel summary report email task if summary report email was disabled.
		if (
			! SummaryReportEmail::is_disabled() &&
			isset( $value['general'][ SummaryReportEmail::SETTINGS_SLUG ] ) &&
			$value['general'][ SummaryReportEmail::SETTINGS_SLUG ] === true
		) {
			( new SummaryReportEmailTask() )->cancel();
		}

		/**
		 * Before updating settings in Setup Wizard.
		 *
		 * @since 2.1.0
		 *
		 * @param array $post POST data.
		 */
		do_action( 'easy_wp_smtp_admin_setup_wizard_update_settings', $value );

		$options->set( $value, false, $overwrite );

		wp_send_json_success();
	}

	/**
	 * Prepare mailer options for all mailers.
	 *
	 * @since 2.1.0
	 *
	 * @return array
	 */
	private function prepare_mailer_options() {

		$data = [];

		foreach ( easy_wp_smtp()->get_providers()->get_options_all() as $provider ) {
			$data[ $provider->get_slug() ] = [
				'slug'        => $provider->get_slug(),
				'title'       => $provider->get_title(),
				'description' => $provider->get_description(),
				'edu_notice'  => $provider->get_notice( 'educational' ),
				'min_php'     => $provider->get_php_version(),
				'disabled'    => $provider->is_disabled(),
				'recommended' => $provider->is_recommended(),
			];
		}

		return apply_filters( 'easy_wp_smtp_admin_setup_wizard_prepare_mailer_options', $data );
	}

	/**
	 * AJAX callback for getting the oAuth authorization URL.
	 *
	 * @since 2.1.0
	 */
	public function get_oauth_url() { // phpcs:ignore Generic.Metrics.CyclomaticComplexity.TooHigh

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error();
		}

		$data   = [];
		$mailer = ! empty( $_POST['mailer'] ) ? sanitize_text_field( wp_unslash( $_POST['mailer'] ) ) : '';

		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$settings = isset( $_POST['settings'] ) ? wp_slash( json_decode( wp_unslash( $_POST['settings'] ), true ) ) : [];

		if ( empty( $mailer ) || empty( $settings ) ) {
			wp_send_json_error();
		}

		$settings = array_merge( $settings, [ 'is_setup_wizard_auth' => true ] );

		$options = Options::init();
		$options->set( [ $mailer => $settings ], false, false );

		$data = apply_filters( 'easy_wp_smtp_admin_setup_wizard_get_oauth_url', $data, $mailer );

		wp_send_json_success( array_merge( [ 'mailer' => $mailer ], $data ) );
	}

	/**
	 * AJAX callback for removing the oAuth authorization connection.
	 *
	 * @since 2.1.0
	 */
	public function remove_oauth_connection() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error();
		}

		$mailer = ! empty( $_POST['mailer'] ) ? sanitize_text_field( wp_unslash( $_POST['mailer'] ) ) : '';

		if ( empty( $mailer ) ) {
			wp_send_json_error();
		}

		$options = Options::init();
		$old_opt = $options->get_all_raw();

		foreach ( $old_opt[ $mailer ] as $key => $value ) {
			// Unset everything except Client ID, Client Secret and Domain.
			if ( ! in_array( $key, array( 'domain', 'client_id', 'client_secret' ), true ) ) {
				unset( $old_opt[ $mailer ][ $key ] );
			}
		}

		$options->set( $old_opt );

		wp_send_json_success();
	}

	/**
	 * AJAX callback for installing a plugin.
	 * Has to contain the `slug` POST parameter.
	 *
	 * @since 2.1.0
	 */
	public function install_plugin() { // phpcs:ignore Generic.Metrics.CyclomaticComplexity.MaxExceeded

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		// Check for permissions.
		if ( ! current_user_can( 'install_plugins' ) ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. You don\'t have permission to install plugins.', 'easy-wp-smtp' ) );
		}

		if ( ! current_user_can( 'activate_plugins' ) ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. You don\'t have permission to activate plugins.', 'easy-wp-smtp' ) );
		}

		$slug = ! empty( $_POST['slug'] ) ? sanitize_text_field( wp_unslash( $_POST['slug'] ) ) : '';

		if ( empty( $slug ) ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. Plugin slug is missing.', 'easy-wp-smtp' ) );
		}

		$url   = esc_url_raw( WP::admin_url( 'admin.php?page=' . Area::SLUG . '-setup-wizard' ) );
		$creds = request_filesystem_credentials( $url, '', false, false, null );

		// Check for file system permissions.
		if ( false === $creds ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. Don\'t have file permission.', 'easy-wp-smtp' ) );
		}

		if ( ! WP_Filesystem( $creds ) ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. Don\'t have file permission.', 'easy-wp-smtp' ) );
		}

		// Do not allow WordPress to search/download translations, as this will break JS output.
		remove_action( 'upgrader_process_complete', [ 'Language_Pack_Upgrader', 'async_upgrade' ], 20 );

		// Create the plugin upgrader with our custom skin.
		$installer = new PluginsInstallUpgrader( new PluginsInstallSkin() );

		// Error check.
		if ( ! method_exists( $installer, 'install' ) || empty( $slug ) ) {
			wp_send_json_error( esc_html__( 'Could not install the plugin. WP Plugin installer initialization failed.', 'easy-wp-smtp' ) );
		}

		include_once ABSPATH . 'wp-admin/includes/plugin-install.php';

		$api = plugins_api(
			'plugin_information',
			[
				'slug'   => $slug,
				'fields' => [
					'short_description' => false,
					'sections'          => false,
					'requires'          => false,
					'rating'            => false,
					'ratings'           => false,
					'downloaded'        => false,
					'last_updated'      => false,
					'added'             => false,
					'tags'              => false,
					'compatibility'     => false,
					'homepage'          => false,
					'donate_link'       => false,
				],
			]
		);

		if ( is_wp_error( $api ) ) {
			wp_send_json_error( $api->get_error_message() );
		}

		$installer->install( $api->download_link );

		// Flush the cache and return the newly installed plugin basename.
		wp_cache_flush();

		if ( $installer->plugin_info() ) {
			$plugin_basename = $installer->plugin_info();

			// Disable the WPForms redirect after plugin activation.
			if ( $slug === 'wpforms-lite' ) {
				update_option( 'wpforms_activation_redirect', true );
			}

			// Disable the AIOSEO redirect after plugin activation.
			if ( $slug === 'all-in-one-seo-pack' ) {
				update_option( 'aioseo_activation_redirect', true );
			}

			// Activate the plugin silently.
			$activated = activate_plugin( $plugin_basename );

			// Disable the RafflePress redirect after plugin activation.
			if ( $slug === 'rafflepress' ) {
				delete_transient( '_rafflepress_welcome_screen_activation_redirect' );
			}

			// Disable the MonsterInsights redirect after plugin activation.
			if ( $slug === 'google-analytics-for-wordpress' ) {
				delete_transient( '_monsterinsights_activation_redirect' );
			}

			// Disable the SeedProd redirect after the plugin activation.
			if ( $slug === 'coming-soon' ) {
				delete_transient( '_seedprod_welcome_screen_activation_redirect' );
			}

			if ( ! is_wp_error( $activated ) ) {
				wp_send_json_success(
					[
						'slug'         => $slug,
						'is_installed' => true,
						'is_activated' => true,
					]
				);
			} else {
				wp_send_json_success(
					[
						'slug'         => $slug,
						'is_installed' => true,
						'is_activated' => false,
					]
				);
			}
		}

		wp_send_json_error( esc_html__( 'Could not install the plugin. WP Plugin installer could not retrieve plugin information.', 'easy-wp-smtp' ) );
	}

	/**
	 * AJAX callback for getting all partner's plugin information.
	 *
	 * @since 2.1.0
	 */
	public function get_partner_plugins_info() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		$contact_form_plugin_already_installed = false;

		$contact_form_basenames = [
			'wpforms-lite/wpforms.php',
			'wpforms/wpforms.php',
			'formidable/formidable.php',
			'formidable/formidable-pro.php',
			'gravityforms/gravityforms.php',
			'ninja-forms/ninja-forms.php',
		];

		$installed_plugins = get_plugins();

		foreach ( $installed_plugins as $basename => $plugin_info ) {
			if ( in_array( $basename, $contact_form_basenames, true ) ) {
				$contact_form_plugin_already_installed = true;

				break;
			}
		}

		// Final check if maybe WPForms is already install and active as a MU plugin.
		if ( class_exists( '\WPForms\WPForms' ) ) {
			$contact_form_plugin_already_installed = true;
		}

		$data = [
			'plugins'                               => [],
			'contact_form_plugin_already_installed' => $contact_form_plugin_already_installed,
		];

		wp_send_json_success( $data );
	}

	/**
	 * AJAX callback for subscribing an email address to the Easy WP SMTP Drip newsletter.
	 *
	 * @since 2.1.0
	 */
	public function subscribe_to_newsletter() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		$email = ! empty( $_POST['email'] ) ? filter_var( wp_unslash( $_POST['email'] ), FILTER_VALIDATE_EMAIL ) : '';

		if ( empty( $email ) ) {
			wp_send_json_error();
		}

		$body = [
			'email' => base64_encode( $email ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
		];

		$wpforms_version_type = $this->get_wpforms_version_type();

		if ( ! empty( $wpforms_version_type ) ) {
			$body['wpforms_version_type'] = $wpforms_version_type;
		}

		wp_remote_post(
			'https://connect.easywpsmtp.com/subscribe/drip/',
			[
				'body' => $body,
			]
		);

		wp_send_json_success();
	}

	/**
	 * Get the WPForms version type if it's installed.
	 *
	 * @since {VERSION}
	 *
	 * @return false|string Return `false` if WPForms is not installed, otherwise return either `lite` or `pro`.
	 */
	private function get_wpforms_version_type() {

		if ( ! function_exists( 'wpforms' ) ) {
			return false;
		}

		if ( method_exists( wpforms(), 'is_pro' ) ) {
			$is_wpforms_pro = wpforms()->is_pro();
		} else {
			$is_wpforms_pro = wpforms()->pro;
		}

		return $is_wpforms_pro ? 'pro' : 'lite';
	}

	/**
	 * AJAX callback for plugin upgrade, from lite to pro.
	 *
	 * @since 2.1.0
	 */
	public function upgrade_plugin() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		if ( easy_wp_smtp()->is_pro() ) {
			wp_send_json_success( esc_html__( 'You are already using the Easy WP SMTP PRO version. Please refresh this page and verify your license key.', 'easy-wp-smtp' ) );
		}

		if ( ! current_user_can( 'install_plugins' ) ) {
			wp_send_json_error( esc_html__( 'You don\'t have the permission to perform this action.', 'easy-wp-smtp' ) );
		}

		$license_key = ! empty( $_POST['license_key'] ) ? sanitize_key( $_POST['license_key'] ) : '';

		if ( empty( $license_key ) ) {
			wp_send_json_error( esc_html__( 'Please enter a valid license key!', 'easy-wp-smtp' ) );
		}

		$url = Connect::generate_url(
			$license_key,
			'',
			add_query_arg( 'upgrade-redirect', '1', self::get_site_url() ) . '#/step/license'
		);

		if ( empty( $url ) ) {
			wp_send_json_error( esc_html__( 'Upgrade functionality not available!', 'easy-wp-smtp' ) );
		}

		wp_send_json_success( [ 'redirect_url' => $url ] );
	}

	/**
	 * AJAX callback for checking the mailer configuration.
	 * - Send a test email
	 * - Check the domain setup with the Domain Checker API.
	 *
	 * @since 2.1.0
	 */
	public function check_mailer_configuration() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		$options = Options::init();
		$mailer  = $options->get( 'mail', 'mailer' );
		$email   = $options->get( 'mail', 'from_email' );
		$domain  = '';

		// Send the test mail.
		$result = wp_mail(
			$email,
			'Easy WP SMTP Automatic Email Test',
			TestTab::get_email_message_text(),
			array(
				'X-Mailer-Type:EasyWPSMTP/Admin/SetupWizard/Test',
			)
		);

		if ( ! $result ) {
			$this->update_completed_stat( false );

			( new UsageTracking() )->send_failed_setup_wizard_usage_tracking_data();

			wp_send_json_error();
		}

		// Add the optional sending domain parameter.
		if ( in_array( $mailer, [ 'mailgun', 'sendinblue' ], true ) ) {
			$domain = $options->get( $mailer, 'domain' );
		}

		// Perform the domain checker API test.
		$domain_checker = new DomainChecker( $mailer, $email, $domain );

		if ( $domain_checker->has_errors() ) {
			$this->update_completed_stat( false );

			( new UsageTracking() )->send_failed_setup_wizard_usage_tracking_data( $domain_checker );

			wp_send_json_error();
		}

		$this->update_completed_stat( true );

		wp_send_json_success();
	}

	/**
	 * AJAX callback for sending feedback.
	 *
	 * @since 2.1.0
	 */
	public function send_feedback() {

		check_ajax_referer( 'easywpsmtp-admin-nonce', 'nonce' );

		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$data = ! empty( $_POST['data'] ) ? json_decode( wp_unslash( $_POST['data'] ), true ) : [];

		$feedback   = ! empty( $data['feedback'] ) ? sanitize_textarea_field( $data['feedback'] ) : '';
		$permission = ! empty( $data['permission'] );

		wp_remote_post(
			'https://easywpsmtp.com/wizard-feedback/',
			[
				'body' => [
					'wpforms' => [
						'id'     => 2271,
						'fields' => [
							'1' => $feedback,
							'2' => $permission ? wp_get_current_user()->user_email : '',
							'3' => easy_wp_smtp()->get_license_type(),
							'4' => EasyWPSMTP_PLUGIN_VERSION,
						],
					],
				],
			]
		);

		wp_send_json_success();
	}

	/**
	 * Data used for the Vue scripts to display old PHP and WP versions warnings.
	 *
	 * @since 2.1.0
	 */
	private function prepare_versions_data() {

		global $wp_version;

		return [
			'php_version'          => phpversion(),
			'php_version_below_56' => apply_filters( 'easy_wp_smtp_temporarily_hide_php_under_55_upgrade_warnings', version_compare( phpversion(), '5.6', '<' ) ),
			'wp_version'           => $wp_version,
			'wp_version_below_52'  => version_compare( $wp_version, '5.2', '<' ),
		];
	}

	/**
	 * Remove 'error' from the automatic clearing list of query arguments after page loads.
	 * This will fix the issue with missing oAuth 'error' argument for the Setup Wizard.
	 *
	 * @since 2.1.0
	 *
	 * @param array $defaults Array of query arguments to be cleared after page load.
	 *
	 * @return array
	 */
	public function maybe_disable_automatic_query_args_removal( $defaults ) {

		if (
			( isset( $_GET['page'] ) && $_GET['page'] === 'easy-wp-smtp-setup-wizard' ) && // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			( ! empty( $_GET['error'] ) ) // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		) {
			$defaults = array_values( array_diff( $defaults, [ 'error' ] ) );
		}

		return $defaults;
	}

	/**
	 * Check if the Setup Wizard should load.
	 *
	 * @since 2.1.0
	 *
	 * @return bool
	 */
	public function should_setup_wizard_load() {

		return (bool) apply_filters( 'easy_wp_smtp_admin_setup_wizard_load_wizard', true );
	}

	/**
	 * Get the Setup Wizard stats.
	 * - launched_time  -> when the Setup Wizard was last launched.
	 * - completed_time -> when the Setup Wizard was last completed.
	 * - was_successful -> if the Setup Wizard was completed successfully.
	 *
	 * @since 2.1.0
	 *
	 * @return array
	 */
	public static function get_stats() {

		$defaults = [
			'launched_time'  => 0,
			'completed_time' => 0,
			'was_successful' => false,
		];

		return get_option( self::STATS_OPTION_KEY, $defaults );
	}

	/**
	 * Update the Setup Wizard stats.
	 *
	 * @since 2.1.0
	 *
	 * @param array $options Take a look at SetupWizard::get_stats method for the possible array keys.
	 */
	public static function update_stats( $options ) {

		update_option( self::STATS_OPTION_KEY, array_merge( self::get_stats(), $options ) , false );
	}

	/**
	 * Update the completed Setup Wizard stats.
	 *
	 * @since 2.1.0
	 *
	 * @param bool $was_successful If the Setup Wizard was completed successfully.
	 */
	private function update_completed_stat( $was_successful ) {

		self::update_stats(
			[
				'completed_time' => time(),
				'was_successful' => $was_successful,
			]
		);
	}

	/**
	 * Prepare an array of Easy WP SMTP PHP constants in use.
	 * Those that are used in the setup wizard.
	 *
	 * @since 2.1.0
	 *
	 * @return array
	 */
	private function prepare_defined_constants() {

		$options = Options::init();

		if ( ! $options->is_const_enabled() ) {
			return [];
		}

		$constants = [
			'EasyWPSMTP_MAIL_FROM'                     => [ 'mail', 'from_email' ],
			'EasyWPSMTP_MAIL_FROM_FORCE'               => [ 'mail', 'from_email_force' ],
			'EasyWPSMTP_MAIL_FROM_NAME'                => [ 'mail', 'from_name' ],
			'EasyWPSMTP_MAIL_FROM_NAME_FORCE'          => [ 'mail', 'from_name_force' ],
			'EasyWPSMTP_MAILER'                        => [ 'mail', 'mailer' ],
			'EasyWPSMTP_SMTPCOM_API_KEY'               => [ 'smtpcom', 'api_key' ],
			'EasyWPSMTP_SMTPCOM_CHANNEL'               => [ 'smtpcom', 'channel' ],
			'EasyWPSMTP_SENDINBLUE_API_KEY'            => [ 'sendinblue', 'api_key' ],
			'EasyWPSMTP_SENDINBLUE_DOMAIN'             => [ 'sendinblue', 'domain' ],
			'EasyWPSMTP_AMAZONSES_CLIENT_ID'           => [ 'amazonses', 'client_id' ],
			'EasyWPSMTP_AMAZONSES_CLIENT_SECRET'       => [ 'amazonses', 'client_secret' ],
			'EasyWPSMTP_AMAZONSES_REGION'              => [ 'amazonses', 'region' ],
			'EasyWPSMTP_MAILGUN_API_KEY'               => [ 'mailgun', 'api_key' ],
			'EasyWPSMTP_MAILGUN_DOMAIN'                => [ 'mailgun', 'domain' ],
			'EasyWPSMTP_MAILGUN_REGION'                => [ 'mailgun', 'region' ],
			'EasyWPSMTP_OUTLOOK_CLIENT_ID'             => [ 'outlook', 'client_id' ],
			'EasyWPSMTP_OUTLOOK_CLIENT_SECRET'         => [ 'outlook', 'client_secret' ],
			'EasyWPSMTP_SMTP_HOST'                     => [ 'smtp', 'host' ],
			'EasyWPSMTP_SMTP_PORT'                     => [ 'smtp', 'port' ],
			'EasyWPSMTP_SSL'                           => [ 'smtp', 'encryption' ],
			'EasyWPSMTP_SMTP_AUTH'                     => [ 'smtp', 'auth' ],
			'EasyWPSMTP_SMTP_AUTOTLS'                  => [ 'smtp', 'autotls' ],
			'EasyWPSMTP_SMTP_USER'                     => [ 'smtp', 'user' ],
			'EasyWPSMTP_SMTP_PASS'                     => [ 'smtp', 'pass' ],
			'EasyWPSMTP_LOGS_ENABLED'                  => [ 'logs', 'enabled' ],
			'EasyWPSMTP_SUMMARY_REPORT_EMAIL_DISABLED' => [ 'general', SummaryReportEmail::SETTINGS_SLUG ],
		];

		$defined = [];

		foreach ( $constants as $constant => $group_and_key ) {
			if ( $options->is_const_defined( $group_and_key[0], $group_and_key[1] ) ) {
				$defined[] = $constant;
			}
		}

		return $defined;
	}
}