<?php
function forum_post_create(
    int $topicId,
    int $forumId,
    int $userId,
    string $ipAddress,
    string $text,
    int $parser = MSZ_PARSER_PLAIN
): int {
    $createPost = db_prepare('
        INSERT INTO `msz_forum_posts`
            (`topic_id`, `forum_id`, `user_id`, `post_ip`, `post_text`, `post_parse`)
        VALUES
            (:topic_id, :forum_id, :user_id, INET6_ATON(:post_ip), :post_text, :post_parse)
    ');
    $createPost->bindValue('topic_id', $topicId);
    $createPost->bindValue('forum_id', $forumId);
    $createPost->bindValue('user_id', $userId);
    $createPost->bindValue('post_ip', $ipAddress);
    $createPost->bindValue('post_text', $text);
    $createPost->bindValue('post_parse', $parser);

    return $createPost->execute() ? db_last_insert_id() : 0;
}

function forum_post_find(int $postId): array
{
    $getPostInfo = db_prepare('
        SELECT
        :post_id as `target_post_id`,
        (
            SELECT `topic_id`
            FROM `msz_forum_posts`
            WHERE `post_id` = `target_post_id`
        ) as `target_topic_id`,
        (
            SELECT COUNT(`post_id`)
            FROM `msz_forum_posts`
            WHERE `topic_id` = `target_topic_id`
            AND `post_id` < `target_post_id`
            ORDER BY `post_id`
        ) as `preceeding_post_count`
    ');
    $getPostInfo->bindValue('post_id', $postId);

    return $getPostInfo->execute() ? $getPostInfo->fetch() : [];
}

function forum_post_listing(int $topicId, int $offset = 0, int $take = 0, bool $showDeleted = false): array
{
    $hasPagination = $offset >= 0 && $take > 0;
    $getPosts = db_prepare(sprintf(
        '
            SELECT
                p.`post_id`, p.`post_text`, p.`post_created`, p.`post_parse`,
                p.`topic_id`, p.`post_deleted`, p.`post_edited`,
                INET6_NTOA(p.`post_ip`) as `post_ip`,
                u.`user_id` as `poster_id`,
                u.`username` as `poster_name`,
                u.`user_created` as `poster_joined`,
                u.`user_country` as `poster_country`,
                COALESCE(u.`user_colour`, r.`role_colour`) as `poster_colour`,
                (
                    SELECT COUNT(`post_id`)
                    FROM `msz_forum_posts`
                    WHERE `user_id` = p.`user_id`
                    AND `post_deleted` IS NULL
                ) as `poster_post_count`
            FROM `msz_forum_posts` as p
            LEFT JOIN `msz_users` as u
            ON u.`user_id` = p.`user_id`
            LEFT JOIN `msz_roles` as r
            ON r.`role_id` = u.`display_role`
            WHERE `topic_id` = :topic_id
            %1$s
            ORDER BY `post_id`
            %2$s
        ',
        $showDeleted ? '' : 'AND `post_deleted` IS NULL',
        $hasPagination ? 'LIMIT :offset, :take' : ''
    ));
    $getPosts->bindValue('topic_id', $topicId);

    if ($hasPagination) {
        $getPosts->bindValue('offset', $offset);
        $getPosts->bindValue('take', $take);
    }

    return $getPosts->execute() ? $getPosts->fetchAll() : [];
}