Guest comments not affecting comment points?

Ah, sorry to say but one final bug remains. It awards the post author twice if the commenter is a member (because I have set 1 point for Content Author in the core comment settings).

Can we make this custom hook to ignore giving points if the commenter is already a member, because the core plugin does that already…

edit: or the alternative would be to set points to 0 in core settings? ??

Here is an updated version:

if ( function_exists( 'mycred_add' ) ) {
	add_action( 'comment_post',              'award_new_guest_comments', 10, 2 );
	function award_new_guest_comments( $comment_id, $comment_status )
	{
		if ( $comment_status == '1' )
			award_points_for_guest_comments( 'approved', '', $comment_id );
	}
	add_action( 'transition_comment_status', 'award_points_for_guest_comments', 10, 3 );
	function award_points_for_guest_comments( $new_status, $old_status, $comment )
	{
		// Look for approved comments and "guests"
		if ( $new_status != 'approved' ) return;

		// Grab the comment object in case it is not there
		if ( !is_object( $comment ) )
			$comment = get_comment( $comment );

		// Ignore logged in users
		if ( $comment->user_id != 0 ) return;

		// Ignore Pingbacks or Trackbacks
		if ( !empty( $comment->comment_type ) ) return;

		// Get post author
		$post = get_post( (int) $comment->comment_post_ID );
		$post_author = $post->post_author;

		// Check if the post author should be excluded
		if ( mycred_exclude_user( $post_author ) === true ) return;

		// Award points to author
		mycred_add(
			'new_comment', // reference
			$post_author, // who to get points
			1, // number of points to award
			'Guest comment on <a href=%c_post_url%>%c_post_title%</a>', // log template to use
			$comment->comment_ID, // save comment id as reference id
			array( 'ref_type' => 'comment' ) // enable support for comment related template tags
		);
	}
}

I am returning with another request of adjustment. Currently, this awards points to Content Author (author of post). So basically the author gets points for commenting on their own post.

Is there a possibility to check if the commenter is the author of post, and if so, skip/don’t award?

Here is the complete code that I use:

if ( function_exists( 'mycred_add' ) ) {
	add_action( 'comment_post',              'award_new_guest_comments', 10, 2 );
	function award_new_guest_comments( $comment_id, $comment_status )
	{
		if ( $comment_status == '1' )
			award_points_for_guest_comments( 'approved', '', $comment_id );
	}
	add_action( 'transition_comment_status', 'award_points_for_guest_comments', 10, 3 );
	function award_points_for_guest_comments( $new_status, $old_status, $comment )
	{
		// Look for approved comments
		if ( $new_status != 'approved' ) return;

		// Grab the comment object in case it is not there
		if ( !is_object( $comment ) )
			$comment = get_comment( $comment );

		// Ignore Pingbacks or Trackbacks
		if ( !empty( $comment->comment_type ) ) return;

		// Get post author
		$post = get_post( (int) $comment->comment_post_ID );
		$post_author = $post->post_author;

		// Check if the post author should be excluded
		if ( mycred_exclude_user( $post_author ) === true ) return;

		// Award points to author
		mycred_add(
			'new_comment', // reference
			$post_author, // who to get points
			1, // number of points to award
			'Guest comment on <a href=%c_post_url%>%c_post_title%</a>', // log template to use
			$comment->comment_ID, // save comment id as reference id
			array( 'ref_type' => 'comment' ) // enable support for comment related template tags
		);
	}
}

Sure you can.

In the above code you have the $post_author variable setup so you just need to make some comparing.

Example to check against an email:

$user = get_user_by( 'email', $comment->comment_author_email );
// If a user exists and it's user ID is the same as the content authors
if ( $user !== false && $user->ID == $post_author ) return;

You would place this before mycred_add() and after $post_author = $post->post_author

Works! Thank you Gabriel.