Check if is required a verified product owner before placing a review

includes/class-wc-comments.php

@@ -51,6 +51,9 @@ class WC_Comments {
 
 		// Set comment type.
 		add_action( 'preprocess_comment', array( __CLASS__, 'update_comment_type' ), 1 );
+
+		// Validate product reviews if requires verified owners.
+		add_action( 'pre_comment_on_post', array( __CLASS__, 'validate_product_review_verified_owners' ) );
 	}
 
 	/**
@@ -444,6 +447,36 @@ class WC_Comments {
 		return $comment_data;
 	}
 
+	/**
+	 * Validate product reviews if requires a verified owner.
+	 *
+	 * @param int $comment_post_id Post ID.
+	 */
+	public static function validate_product_review_verified_owners( $comment_post_id ) {
+		// Only validate if option is enabled.
+		if ( 'yes' !== get_option( 'woocommerce_review_rating_verification_required' ) ) {
+			return;
+		}
+
+		// Validate only products.
+		if ( 'product' !== get_post_type( $comment_post_id ) ) {
+			return;
+		}
+
+		// Skip if is a verified owner.
+		if ( wc_customer_bought_product( '', get_current_user_id(), $comment_post_id ) ) {
+			return;
+		}
+
+		wp_die(
+			esc_html__( 'Only logged in customers who have purchased this product may leave a review.', 'woocommerce' ),
+			esc_html__( 'Reviews can only be left by "verified owners"', 'woocommerce' ),
+			array(
+				'code' => 403,
+			)
+		);
+	}
+
 	/**
 	 * Determines if a comment is of the default type.
 	 *