<?php

    /**
     * The Legend of Z
     *
     * @author      Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     * @copyright   2014 Heinrich-Heine-Universität Düsseldorf
     * @license     http://www.gnu.org/licenses/gpl.html
     * @link        https://bitbucket.org/coderkun/the-legend-of-z
     */

    namespace hhu\z\models;


    /**
     * Model to interact with Questgrouptexts-table.
     *
     * @author  Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     */
    class QuestgrouptextsModel extends \hhu\z\Model
    {


        /**
         * Construct a new QuestgrouptextsModel.
         */
        public function __construct()
        {
            parent::__construct();
        }


        /**
         * Get texts of a Questgroup.
         *
         * @param   int $questgroupId   ID of a Questgroup
         * @return  array           Texts of this Questgroup
         */
        public function getQuestgroupTexts($questgroupId)
        {
            return $this->db->query(
                'SELECT id, pos, text, questgroup_id '.
                'FROM questgrouptexts '.
                'WHERE questgroup_id = ? '.
                'ORDER BY pos ASC',
                'i',
                $questgroupId
            );
        }


        /**
         * Add a Questgroup text to a Questgroup.
         *
         * @param   int $userId     ID of user
         * @param   int $questgroupId   ID of Questgroup to add text to
         * @param   string  $text       Text to add
         */
        public function addQuestgrouptextToQuestgroup($userId, $questgroupId, $text)
        {
            // Get position
            $pos = $this->db->query(
                'SELECT COALESCE(MAX(pos),0)+1 AS pos '.
                'FROM questgrouptexts '.
                'WHERE questgroup_id = ?',
                'i',
                $questgroupId
            );
            $pos = $pos[0]['pos'];

            // Add Questgroup text
            $this->db->query(
                'INSERT INTO questgrouptexts '.
                '(created_user_id, questgroup_id, pos, text) '.
                'VALUES '.
                '(?, ?, ?, ?)',
                'iiis',
                $userId, $questgroupId, $pos, $text
            );
        }


        /**
         * Edit a Questgroup text.
         *
         * @param   int $questgrouptextId   ID of Questgroup text to edit
         * @param   string  $text           New text
         */
        public function editQuestgrouptext($questgrouptextId, $text)
        {
            $this->db->query(
                'UPDATE questgrouptexts '.
                'SET text = ? '.
                'WHERE id = ?',
                'si',
                $text,
                $questgrouptextId
            );
        }


        /**
         * Copy Questgroup texts from one Questgroup to another.
         *
         * @param   $userId             ID of copying user
         * @param   $sourceQuestgroupId ID of source Questgroup
         * @param   $targetQuestgroupId ID of target Questgroup
         */
        public function copyQuestgrouptexts($userId, $sourceQuestgroupId, $targetQuestgroupId)
        {
            $this->db->query(
                'INSERT INTO questgrouptexts '.
                '(created_user_id, questgroup_id, pos, text) '.
                'SELECT ?, ?, pos, text '.
                'FROM questgrouptexts '.
                'WHERE questgroup_id = ?',
                'iii',
                $userId, $targetQuestgroupId,
                $sourceQuestgroupId
            );
        }


        /**
         * Delete a Questgroup text.
         *
         * @param   array   $questgrouptext Data of Questgroup text to delete
         */
        public function deleteQuestgrouptext($questgrouptext)
        {
            // Delete Questgroup text
            $this->db->query('DELETE FROM questgrouptexts WHERE id = ?', 'i', $questgrouptext['id']);

            // Adjust positions
            $this->db->query(
                'UPDATE questgrouptexts '.
                'SET pos = pos - 1 '.
                'WHERE questgroup_id = ? AND pos > ?',
                'ii',
                $questgrouptext['questgroup_id'],
                $questgrouptext['pos']
            );
        }


        /**
         * Delete all Questgroup texts of a Questgroup.
         *
         * @param   int $questgroupId   ID of Questgroup to delete texts of
         */
        public function deleteQuestgrouptexts($questgroupId)
        {
            $this->db->query('DELETE FROM questgrouptexts WHERE questgroup_id = ?', 'i', $questgroupId);
        }

    }

?>