/**
* Check if a user has already voted for a post
* @param type $post_id
* @param type $user_id
* @return bool
*/
function bbpvotes_has_user_voted_for_post($post_id = null, $user_id = 0)
{
$votes_up = bbpvotes_has_user_voted_up_for_post($post_id, $user_id);
$votes_down = bbpvotes_has_user_voted_down_for_post($post_id, $user_id);
if (!$votes_up && !$votes_down) {
return false;
}
return true;
}
/**
*
* @param type $post_id
* @param type $vote MUST BE defined, MUST BE a boolean
* @return boolean|\WP_Error
*/
function do_post_vote($post_id, $vote = null)
{
//check vote value
if (is_bool($vote) === false) {
return new WP_Error('vote_is_not_bool', __('Vote is not a boolean', 'bbpvotes'));
}
$voteplus = $vote === true;
$voteminus = $vote === false;
if (!($post = get_post($post_id))) {
return false;
}
if ($voteplus && !bbpvotes_can_user_vote_up_for_post($post->ID) || $voteminus && !bbpvotes_can_user_vote_down_for_post($post->ID)) {
return new WP_Error('missing_capability', __("You don't have the required capability to vote", 'bbpvotes'));
}
$user_id = get_current_user_id();
//check user is not post author
if ($post->post_author == $user_id) {
return new WP_Error('user_is_author', __('You cannot vote for your own post', 'bbpvotes'));
}
//get current votes
$post_score = bbpvotes_get_votes_score_for_post($post->ID);
$votes_count = bbpvotes_get_votes_count_for_post($post->ID);
$user_voted_up = bbpvotes_has_user_voted_up_for_post($post->ID, $user_id);
$user_voted_down = bbpvotes_has_user_voted_down_for_post($post->ID, $user_id);
$toggle_vote = $voteplus && $user_voted_down || $voteminus && $user_voted_up;
$unvote = bbpvotes()->options['unvote_enabled'] && ($voteplus && $user_voted_up || $voteminus && $user_voted_down);
//remove old vote first if any
if ($toggle_vote || $unvote) {
//get previous vote meta key
if ($user_voted_down) {
$meta_previous_vote = $this->metaname_post_vote_down;
} else {
$meta_previous_vote = $this->metaname_post_vote_up;
}
if ($removed_previous_vote = delete_post_meta($post->ID, $meta_previous_vote, $user_id)) {
//successfully deleted
$votes_count--;
//restore score
if ($user_voted_down) {
$post_score++;
} else {
$post_score--;
}
}
}
if ($voteplus && $user_voted_up || $voteminus && $user_voted_down) {
//vote duplicate : remove or block it
if (bbpvotes()->options['unvote_enabled']) {
//remove vote
if (!bbpvotes_can_user_unvote_for_post($post->ID)) {
return new WP_Error('missing_capability', __("You don't have the required capability to unvote", 'bbpvotes'));
} else {
if ($removed_previous_vote) {
update_post_meta($post->ID, $this->metaname_post_vote_score, $post_score);
update_post_meta($post->ID, $this->metaname_post_vote_count, $votes_count);
do_action('bbpvotes_do_post_unvote', $post->ID, $user_id);
} else {
return new WP_Error('unvoting_error', __('Error while unvoting for this post', 'bbpvotes'));
}
}
} else {
//block vote
return new WP_Error('already_voted', __('You have already voted for this post', 'bbpvotes'));
}
} else {
//process vote
//get new vote meta key
if ($voteplus) {
$meta_vote = $this->metaname_post_vote_up;
} else {
$meta_vote = $this->metaname_post_vote_down;
}
if ($result = add_post_meta($post->ID, $meta_vote, $user_id)) {
$votes_count++;
//update score
if ($voteplus) {
$post_score++;
} else {
$post_score--;
}
update_post_meta($post->ID, $this->metaname_post_vote_score, $post_score);
update_post_meta($post->ID, $this->metaname_post_vote_count, $votes_count);
} else {
return new WP_Error('voting_error', __('Error while voting for this post', 'bbpvotes'));
}
do_action('bbpvotes_do_post_vote', $post->ID, $user_id, $vote);
}
return true;
}
