comment once per post but reply to existing comments

[SialoS]

Hello to all,

I am using wordpress and i want to restrict my users to be able to comment only once per post but be able to reply to existing comments. How can i do that?

I found this code which checks if a user has already comment and hide the form. but with this code users cant reply. how can i do that?
[php]

<?php global $current_user; $args = array('user_id' => $current_user->ID); $usercomment = get_comments($args); if(count($usercomment) >= 1){ echo 'disabled'; } else { comment_form(); } ?>[/php]

The other thought is to always show the form but hide it with css.
this means that i have to add new css class to the comment form but i dont know how.
i came up to here
[php]

<?php global $current_user,$post; $args = array('user_id' => $current_user->ID,'post_id' => $post->ID); $usercomment = get_comments($args); if(count($usercomment) >= 1){ comment_form(); } else { comment_form(); ; } ?>[/php]

and i get this error Parse error: syntax error, unexpected ‘<’ in…

Thank you

[SialoS]

This is a solution with css trick .

[php]<?php
global $current_user,$post;
$args = array(‘user_id’ => $current_user->ID,‘post_id’ => $post->ID);
$usercomment = get_comments($args);
if(count($usercomment) >= 1){?>

<?php comment_form(); ?>

<?php } else { ?>

<?php comment_form(); ?>

<?php } ?>[/php]

and add this to your css

[php].withcomment {
display: none;
}[/php]

if someone else know something better, please post!

[SialoS]

So after some time i done exactly what i wanted and i thought it would be nice to share.

So in Functions.php add

function c_parent_comment_counter($pid,$uid){ global $wpdb; $query = "SELECT COUNT(comment_post_id) AS count FROM $wpdb->comments WHERE <code>comment_approved</code> = 1 AND <code>comment_post_ID</code> = $pid AND <code>user_id</code> = $uid AND <code>comment_parent</code> = 0"; $parents = $wpdb->get_row($query); return $parents->count; }

and in comments.php

[php]global $current_user, $post;
$number_of_parents = c_parent_comment_counter($post->ID,$current_user->ID);
echo "parents: ".$number_of_parents;
if ( $number_of_parents >= 1 ) {
echo ‘’;
comment_form( array( ‘title_reply’ => __( ‘Reply’ ) ) );
echo ‘’;
} else {
echo ‘’ . comment_form( array( ‘title_reply’ => __( ‘Your opinion’ ) ) ) . ‘’;
}
?>[/php]

in style.css

.withcomment { display: none; }

This will count how many parent comments a user added and if its one or more it will hide the form. if its 0 it will show the form. but when you click the reply button the form will show and you will be able to reply to any comment.
THIS IS NOT HACK PROOF!!!