Tweak - Catch mail send error

includes/admin/class-evf-admin-notices.php

@@ -31,6 +31,7 @@
 		'survey'          => 'survey_notice',
 		'allow_usage'     => 'allow_usage_notice',
 		'php_deprecation' => 'php_deprecation_notice',
+		'email_failed'    => 'email_failed_notice',
 	);
 
 	/**
@@ -84,6 +85,7 @@
 		self::add_notice( 'survey' );
 		self::add_notice( 'allow_usage' );
 		self::add_notice( 'php_deprecation' );
+		self::add_notice( 'email_failed' );
 	}
 
 	/**
@@ -245,7 +247,7 @@
 				'dismissed' => false,
 			);
 			update_option( 'everest_forms_review', $review );
 		} else {
 			// Check if it has been dismissed or not.
 			if ( ( isset( $review['dismissed'] ) && ! $review['dismissed'] ) && ( isset( $review['time'] ) && ( ( $review['time'] + DAY_IN_SECONDS ) <= $time ) ) ) {
 				$load = true;
@@ -260,7 +262,7 @@
 			if ( empty( $entries_count ) || $entries_count < 50 ) {
 				return;
 			}
 		} else {
 			// Only continue if plugin has been installed for at least 14 days.
 			if ( ( $activated + ( WEEK_IN_SECONDS * 2 ) ) > $time ) {
 				return;
@@ -301,7 +303,7 @@
 
 		return $status;
 
 	}
 
 	/**
 	 * Include allow usage & discount notice.
@@ -341,6 +343,23 @@
 		}
 	}
 
+	/**
+	 * Email Failed  Notice
+	 */
+	public static function email_failed_notice() {
+		$failed_data   = get_transient( 'everest_forms_mail_send_failed_count' );
+		$failed_count  = isset( $failed_data['failed_count'] ) ? $failed_data['failed_count'] : 0;
+		$error_message = isset( $failed_data['error_message'] ) ? $failed_data['error_message'] : '';
+		$show_notice   = $failed_count > 5 ? true : false;
+		if ( $show_notice ) {
+			$is_dismissed = get_option( 'everest_forms_email_send_notice_dismiss', false );
+		}
+		if ( $show_notice && ! $is_dismissed ) {
+			include 'views/html-notice-email-failed-notice.php';
+		}
+	}
+
+
 	/**
 	 * Remove non-EverestForms notices from EverestForms pages.
 	 *

includes/admin/views/html-notice-email-failed-notice.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * Admin View: Notice - Email Failed Notice.
+ *
+ * @package Everest Forms
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+?>
+
+<div class="notice notice-warning is-dismissible" id="everest-forms-email-failed-notice">
+	<p>
+		<strong><?php esc_html_e( 'Everest Forms Email Send Error', 'everest-forms' ); ?></strong><br/>
+		<?php esc_html_e( 'The last email sent from the User Registration Plugin was not delivered to the user.', 'everest-forms' ); ?>
+	</p>
+	<p style="border-left: 2px solid #72aee6; background: #F0FFFF; padding: 10px;">
+		<?php esc_html_e( ''.$error_message.'', 'everest-forms' ); ?>
+	</p>
+	<br/>
+	<p>
+		<a href="https://docs.wpeverest.com/everest-forms/docs/emails-are-not-being-delivered/" target="_blank">
+			<?php esc_html_e( 'Learn More', 'everest-forms' ); ?>
+		</a>
+	</p>
+</div>
+
+<script>
+	jQuery(function($) {
+		$(document).ready(function() {
+			var noticeContainer = $('#everest-forms-email-failed-notice');
+			noticeContainer.find('.notice-dismiss').on('click', function(e) {
+				e.preventDefault();
+
+				$.post(ajaxurl, {
+					action: 'everest_forms_email_failed_notice_dismiss',
+					_wpnonce: '<?php echo esc_js( wp_create_nonce( 'email_failed_nonce' ) ); ?>'
+				});
+			});
+		});
+	});
+</script>

includes/class-evf-ajax.php

@@ -111,6 +111,7 @@
 			'survey_dismiss'                 => false,
 			'allow_usage_dismiss'            => false,
 			'php_notice_dismiss'             => false,
+			'email_failed_notice_dismiss'    => false,
 			'enabled_form'                   => false,
 			'import_form_action'             => false,
 			'template_licence_check'         => false,
@@ -830,6 +831,16 @@
 		wp_die();
 	}
 
+	public static function email_failed_notice_dismiss() {
+		check_ajax_referer( 'email_failed_nonce', '_wpnonce' );
+
+		if ( ! current_user_can( 'manage_everest_forms' ) ) {
+			wp_die( -1 );
+		}
+		update_option( 'everest_forms_email_send_notice_dismiss', true );
+		wp_die();
+	}
+
 	/**
 	 * Triggered when clicking the form toggle.
 	 */
@@ -941,7 +952,7 @@
 			$message  = '<div class="everest-forms-message-text">';
 			$message .= '<h3 style="text-align:center; color: #ffc107;">' . esc_html( 'PS. This is just the sample data' ) . '</h3>';
 			$message .= '<p><strong>' . esc_html__( 'Hi there!', 'everest-forms' ) . ' 👋</strong></p>';
 			$message .= '<p>' . esc_html__( 'Let\'s see how your forms performed ' . $evf_summary_duration . '.', 'everest-forms' ) . '</p>';
 			$message .= '<br/>';
 			$message .= '<p><strong>' . esc_html__( 'Forms Stats', 'everest-forms' ) . '</strong></p>';
 			$message .= '<table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="solid #dddddd; display:block;min-width: 100%;border-collapse: collapse;width:100%; display:table; padding-bottom:2rem" class="evf_entries_summary_table">';
@@ -1173,7 +1184,7 @@
 					$is_imported   = false;
 					$imported_text = esc_html__( 'No', 'everest-forms' );
 				}
 				$forms_list_table .= '<tr id="evf-fm-row-' . esc_attr( $row ) . '" class="evf-fm-row ' . esc_attr( $hidden ) . '"><td><input class="evf-fm-select-single" type="checkbox" name="fm_select_single_form_' . esc_attr( $form_id ) . '" data-form-id="' . esc_attr( $form_id ) . '" /></td><td>' . esc_html__( $form_name, 'everest-forms' ) . '</td><td><p class="evf-fm-imported" data-form-id="' . esc_attr( $form_id ) . '">' . esc_attr( $imported_text ) . '<p></td>';
 				$forms_list_table .= '<td>';
 				$forms_list_table .= '<div class="evf-fm-import-actions"><button class="evf-fm-import-single" data-form-id="' . esc_attr( $form_id ) . '">' . esc_html( 'Import Form' ) . '</button>';
 				if ( 'contact-form-7' !== $form_slug ) {

includes/class-evf-emails.php

@@ -367,6 +367,19 @@ public function send( $to, $subject, $message, $attachments = '', $connection_id
 		// Let's do this.
 		$sent = wp_mail( $to, $subject, $message, $this->get_headers(), $this->attachments );
 
+		if ( ! $sent ) {
+			$error_message = apply_filters( 'everest_forms_email_send_failed_message', '' );
+			$failed_data  = get_transient( 'everest_forms_mail_send_failed_count' );
+			$failed_count = $failed_data && isset( $failed_data['failed_count'] ) ? $failed_data['failed_count'] : 0;
+			++$failed_count;
+			set_transient(
+				'everest_forms_mail_send_failed_count',
+				array(
+					'failed_count'  => $failed_count,
+					'error_message' => $error_message,
+				)
+			);
+		}
 		// Hooks after the email is sent.
 		do_action( 'everest_forms_email_send_after', $this );
 

includes/evf-core-functions.php

@@ -1132,7 +1132,7 @@
  * @return array of form data.
  */
 function evf_get_all_forms( $skip_disabled_entries = false, $check_disable_storing_entry_info = true ) {
 	if( is_null( evf()->form ) ) {
 		return array();
 	}
 	$forms    = array();
@@ -5593,3 +5593,40 @@
 
 	return isset( $next_key ) ? $next_key : '' ;
 }
+
+
+add_action( 'wp_mail_failed', 'evf_email_send_failed_handler', 1 );
+
+if ( ! function_exists( 'evf_email_send_failed_handler' ) ) {
+
+	/**
+	 * Handle errors fetch mechanism when mail send failed.
+	 *
+	 * @param object $error_instance WP_Error message instance.
+	 */
+	function evf_email_send_failed_handler( $error_instance ) {
+		$error_message = '';
+		$decoded_message = json_decode( $error_instance->get_error_message() );
+
+		if ( json_last_error() === JSON_ERROR_NONE && ! empty( $decoded_message ) ) {
+			/* translators: %s: Status Log URL */
+			$error_message = wp_kses_post( sprintf( __( 'Please check the `evf_mail_errors` log under <a target="_blank" href="%s"> Logs </a> section.', 'everest-forms' ), admin_url( 'admin.php?page=evf-tools&tab=logs' ) ) );
+		} else {
+			$error_message = $error_instance->get_error_message();
+		}
+
+		evf_get_logger()->info(
+			$error_message,
+			array( 'source' => 'evf_mail_errors' )
+		);
+
+		if ( ! empty( $error_message ) ) {
+			add_filter(
+				'everest_forms_email_send_failed_message',
+				function ( $msg ) use ( $error_message ) {
+					return $error_message;
+				}
+			);
+		}
+	}
+}