<?php

/**
 * interface/main/holidays/Holidays_Storage.php holidays/clinic interaction with the database
 *
 * This class contains all the interaction with the database
 * that are used by the holidays/clinic closed events.
 *
 * @package   OpenEMR
 * @link      http://www.open-emr.org
 * @author    sharonco <sharonco@matrix.co.il>
 * @copyright Copyright (c) 2016 Sharon Cohen <sharonco@matrix.co.il>
 * @license   https://github.com/openemr/openemr/blob/master/LICENSE GNU General Public License 3
 */

class Holidays_Storage
{
    const TABLE_NAME = "calendar_external";
    const CALENDAR_CATEGORY_HOLIDAY = "6";
    const CALENDAR_CATEGORY_CLOSED = "7";

    /**
     * This function selects ALL the holidays from the table calendar_external and returns an array
     * @return array
     */
    public function get_holidays()
    {
        $holidays = array();
        $sql = "SELECT * FROM " . escape_table_name(self::TABLE_NAME);
        $res = sqlStatement($sql);
        while ($row = sqlFetchArray($res)) {
            $holidays[] = $row;
        }

        return $holidays;
    }

    /**
     * Selects  holidays/closed clinic events from the table events in a range of dates
     * @param $star_date
     * @param $end_date
     * @return array [0=>"2016/06/16"]
     */
    public static function get_holidays_by_dates($start_date, $end_date)
    {
        $holidays = array();
        $sql = 'SELECT * FROM openemr_postcalendar_events WHERE (pc_catid = ? OR pc_catid = ?) AND pc_eventDate >= ? AND pc_eventDate <= ?';
        $res = sqlStatement($sql, array(self::CALENDAR_CATEGORY_HOLIDAY,self::CALENDAR_CATEGORY_CLOSED,$start_date,$end_date));
        while ($row = sqlFetchArray($res)) {
            $holidays[] = $row['pc_eventDate'];
        }

        return $holidays;
    }

    /**
     * From an array of holidays creates a row that will be inserted as an event to be used in the calendar
     * The holidays array must contai the date=>DD/MM/YYY, description=>"string"
     * @param array $holidays
     */
    public function create_events(array $holidays)
    {
        $deleted = false;
        foreach ($holidays as $holiday) {
            if (!$deleted) {
                $this->delete_holiday_events();
                $deleted = true;
            }

            $row = array(
                self::CALENDAR_CATEGORY_HOLIDAY,//catgory
                0,//authid
                0,//pid
                $holiday['description'],//title
                $holiday['date'],//date
                86400,//duration all day in seconds
                "a:6:{s:17:\"event_repeat_freq\";s:1:\"0\";s:22:\"event_repeat_freq_type\";s:1:\"0\";s:19:\"event_repeat_on_num\";s:1:\"1\";s:19:\"event_repeat_on_day\";s:1:\"0\";s:20:\"event_repeat_on_freq\";s:1:\"0\";s:6:\"exdate\";s:0:\"\";}",
                1,//allday
                1,//status
                isset($_SESSION['pc_facility']) ? $_SESSION['pc_facility'] : 0,//facility
                2 //SHARING_PUBLIC
            );

            $pc_eid = sqlInsert(
                "INSERT INTO openemr_postcalendar_events ( " .
                "pc_catid,  pc_aid, pc_pid, pc_title, pc_time, " .
                "pc_eventDate,  pc_duration, " . "pc_recurrspec,  pc_alldayevent, " . " pc_eventstatus, pc_facility,pc_sharing" .
                ") VALUES (?,?,?,?,NOW(),?,?,?,?,?,?,?)",
                $row
            );
        }

        return true;
    }

    /**
     * This function opend the $file(csv) and parses it to insert the values in the calendar_external so later they can be imported as events
     * csv format -> date,description
     * Example:
     * 2016/12/24,Christmas
     * @param $file (string containing the file name)
     */
    public function import_holidays($file)
    {
        $data = array();
        $handle = fopen($file, "r");
        $deleted = false;
        do {
            if ($data[0]) {
                if (!$deleted) {
                    $this->delete_calendar_external();
                    $deleted = true;
                }

                $row = array($data[0],$data[1]);
                sqlStatement("INSERT INTO " . escape_table_name(self::TABLE_NAME) . "(date,description,source)" . " VALUES (?,?,'csv')", $row);
            }
        } while ($data = fgetcsv($handle, 1000, ",", "'"));
        return true;
    }

    private function delete_calendar_external()
    {
        $sql = "TRUNCATE TABLE " . escape_table_name(self::TABLE_NAME);
        $res = sqlStatement($sql);
    }

    private function delete_holiday_events()
    {
        $sql = "DELETE FROM openemr_postcalendar_events WHERE pc_catid = ?";
        sqlStatement($sql, array(self::CALENDAR_CATEGORY_HOLIDAY));
    }
}