<?php
if (!defined('sugarEntry') || !sugarEntry) {
    die('Not A Valid Entry Point');
}
/**
 *
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
 *
 * SuiteCRM is an extension to SugarCRM Community Edition developed by SalesAgility Ltd.
 * Copyright (C) 2011 - 2018 SalesAgility Ltd.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Powered by SugarCRM" and "Supercharged by SuiteCRM".
 */


class CalendarUtils
{

    /**
     * Find first day of week according to user's settings
     * @param SugarDateTime $date
     * @return SugarDateTime $date
     */
    public static function get_first_day_of_week(SugarDateTime $date)
    {
        $fdow = $GLOBALS['current_user']->get_first_day_of_week();
        if ($date->day_of_week < $fdow) {
            $date = $date->get('-7 days');
        }
        return $date->get_day_by_index_this_week($fdow);
    }


    /**
     * Get list of needed fields for modules
     * @return array
     */
    public static function get_fields()
    {
        return array(
            'Meetings' => array(
                'name',
                'duration_hours',
                'duration_minutes',
                'status',
                'related_to',
                'parent_name',
                'parent_id',
                'parent_type',
            ),
            'Calls' => array(
                'name',
                'duration_hours',
                'duration_minutes',
                'status',
                'related_to',
                'parent_name',
                'parent_id',
                'parent_type',
            ),
            'Tasks' => array(
                'name',
                'status',
                'related_to',
                'parent_name',
                'parent_id',
                'parent_type',
                'priority',
                'date_due'
            ),
        );
    }

    /**
     * Get array of needed time data
     * @param SugarBean $bean
     * @return array
     */
    public static function get_time_data(SugarBean $bean, $start_field = "date_start", $end_field = "date_end")
    {
        $arr = array();

        if ($bean->object_name == 'Task') {
            $start_field = $end_field = "date_due";
        }
        if (empty($bean->$start_field)) {
            return array();
        }
        if (empty($bean->$end_field)) {
            $bean->$end_field = $bean->$start_field;
        }

        if ($bean->field_defs[ $start_field ]['type'] == "date") {
            $timestamp = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_format(), $bean->$start_field, new DateTimeZone('UTC'))->format('U');
        } else {
            $timestamp = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $bean->$start_field, new DateTimeZone('UTC'))->format('U');
        }
        $arr['timestamp'] = $timestamp;
        $arr['time_start'] = $GLOBALS['timedate']->fromTimestamp($arr['timestamp'])->format($GLOBALS['timedate']->get_time_format());

        if ($bean->field_defs[ $start_field ]['type'] == "date") {
            $date_start = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_format(), $bean->$start_field, new DateTimeZone('UTC'));
        } else {
            $date_start = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $bean->$start_field, new DateTimeZone('UTC'));
        }

        $arr['ts_start'] = $date_start->get("-".$date_start->format("H")." hours -".$date_start->format("i")." minutes -".$date_start->format("s")." seconds")->format('U');
        $arr['offset'] = $date_start->format('H') * 3600 + $date_start->format('i') * 60;

        if ($bean->field_defs[ $start_field ]['type'] == "date") {
            $date_end = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_format(), $bean->$end_field, new DateTimeZone('UTC'));
        } else {
            $date_end = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $bean->$end_field, new DateTimeZone('UTC'));
        }

        if ($bean->object_name != 'Task') {
            $date_end->modify("-1 minute");
        }
        $arr['ts_end'] = $date_end->get("+1 day")->get("-".$date_end->format("H")." hours -".$date_end->format("i")." minutes -".$date_end->format("s")." seconds")->format('U');
        $arr['days'] = ($arr['ts_end'] - $arr['ts_start']) / (3600*24);

        return $arr;
    }


    /**
     * Get array that will be sent back to ajax frontend
     * @param SugarBean $bean
     * @return array
     */
    public static function get_sendback_array(SugarBean $bean)
    {
        if (isset($bean->parent_name) && isset($_REQUEST['parent_name'])) {
            $bean->parent_name = $_REQUEST['parent_name'];
        }

        $users = array();
        if ($bean->object_name == 'Call') {
            $users = $bean->get_call_users();
        } elseif ($bean->object_name == 'Meeting') {
            $users = $bean->get_meeting_users();
        }
        $user_ids = array();
        foreach ($users as $u) {
            $user_ids[] = $u->id;
        }

        $field_list = CalendarUtils::get_fields();
        $field_arr = array();
        foreach ($field_list[$bean->module_dir] as $field) {
            if ($field == 'related_to') {
                $focus = BeanFactory::getBean($bean->parent_type, $bean->parent_id);
                $field_arr[$field] = $focus->name;
            } else {
                $field_arr[$field] = $bean->$field;
            }
        }

        $date_field = "date_start";
        if ($bean->object_name == 'Task') {
            $date_field = "date_due";
        }

        $arr = array(
                'access' => 'yes',
                'type' => strtolower($bean->object_name),
                'module_name' => $bean->module_dir,
                'user_id' => $bean->assigned_user_id,
                'detail' => 1,
                'edit' => 1,
                'name' => $bean->name,
                'record' => $bean->id,
                'users' => $user_ids,
            );
        if (!empty($bean->repeat_parent_id)) {
            $arr['repeat_parent_id'] = $bean->repeat_parent_id;
        }
        $arr = array_merge($arr, $field_arr);
        $arr = array_merge($arr, CalendarUtils::get_time_data($bean));

        return $arr;
    }

    /**
     * Get array of repeat data
     * @param SugarBean $bean
     * @return array
     */
    public static function get_sendback_repeat_data(SugarBean $bean)
    {
        if ($bean->module_dir == "Meetings" || $bean->module_dir == "Calls") {
            if (!empty($bean->repeat_parent_id) || (!empty($bean->repeat_type) && empty($_REQUEST['edit_all_recurrences']))) {
                if (!empty($bean->repeat_parent_id)) {
                    $repeat_parent_id = $bean->repeat_parent_id;
                } else {
                    $repeat_parent_id = $bean->id;
                }
                return array("repeat_parent_id" => $repeat_parent_id);
            }

            $arr = array();
            if (!empty($bean->repeat_type)) {
                $arr = array(
                    'repeat_type' => $bean->repeat_type,
                    'repeat_interval' => $bean->repeat_interval,
                    'repeat_dow' => $bean->repeat_dow,
                    'repeat_until' => $bean->repeat_until,
                    'repeat_count' => $bean->repeat_count,
                );
            }

            // TODO CHECK DATETIME VARIABLE
            if (!empty($_REQUEST['date_start'])) {
                $date_start = $_REQUEST['date_start'];
            } else {
                $date_start = $bean->date_start;
            }

            $date = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $date_start);
            $arr = array_merge($arr, array(
                'current_dow' => $date->format("w"),
                'default_repeat_until' => $date->get("+1 Month")->format($GLOBALS['timedate']->get_date_format()),
            ));

            return $arr;
        }
        return false;
    }

    /**
     * Build array of datetimes for recurring meetings
     * @param string $date_start
     * @param array $params
     * @return array
     */
    public static function build_repeat_sequence($date_start, $params)
    {
        $arr = array();

        $type = $params['type'];
        $interval = (int)$params['interval'];
        if ($interval < 1) {
            $interval = 1;
        }

        if (!empty($params['count'])) {
            $count = $params['count'];
            if ($count < 1) {
                $count = 1;
            }
        } else {
            $count = 0;
        }

        if (!empty($params['until'])) {
            $until = $params['until'];
        } else {
            $until = $date_start;
        }

        if ($type == "Weekly") {
            $dow = $params['dow'];
            if ($dow == "") {
                return array();
            }
        }

        /**
         * @var SugarDateTime $start Recurrence start date.
         */
        $start = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $date_start);
        /**
         * @var SugarDateTime $end Recurrence end date. Used if recurrence ends by date.
         */

        if (!empty($params['until'])) {
            $end = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_format(), $until);
            $end->setTime(0, 0, 0);
            $end->modify("+1 Day");
        } else {
            $end = $start;
        }
        $current = clone $start;

        $i = 1; // skip the first iteration
        $w = $interval; // for week iteration
        $last_dow = $start->format("w");

        $limit = SugarConfig::getInstance()->get('calendar.max_repeat_count', 1000);

        while ($i < $count || ($count == 0 && $current->format("U") < $end->format("U"))) {
            $skip = false;
            switch ($type) {
                case "Daily":
                    $current->modify("+{$interval} Days");
                    break;
                case "Weekly":
                    $day_index = $last_dow;
                    for ($d = $last_dow + 1; $d <= $last_dow + 7; $d++) {
                        $day_index = $d % 7;
                        if (strpos($dow, (string)($day_index)) !== false) {
                            break;
                        }
                    }
                    $step = $day_index - $last_dow;
                    $last_dow = $day_index;
                    if ($step <= 0) {
                        $step += 7;
                        $w++;
                    }
                    if ($w % $interval != 0) {
                        $skip = true;
                    }

                    $current->modify("+{$step} Days");
                    break;
                case "Monthly":
                    $current->modify("+{$interval} Months");
                    break;
                case "Yearly":
                    $current->modify("+{$interval} Years");
                    break;
                default:
                    return array();
            }

            if ($skip) {
                continue;
            }

            if (($i < $count || $count == 0 && $current->format("U") < $end->format("U"))) {
                $arr[] = $current->format($GLOBALS['timedate']->get_date_time_format());
            }
            $i++;

            if ($i > $limit + 100) {
                break;
            }
        }
        return $arr;
    }

    /**
     * Save repeat activities
     * @param SugarBean $bean
     * @param array $time_arr array of datetimes
     * @return array
     */
    public static function save_repeat_activities(SugarBean $bean, $time_arr)
    {

        // Here we will create single big inserting query for each invitee relationship
        // rather than using relationships framework due to performance issues.
        // Relationship framework runs very slowly

        $db = DBManagerFactory::getInstance();
        $id = $bean->id;
        $date_modified = $GLOBALS['timedate']->nowDb();
        $lower_name = strtolower($bean->object_name);

        $qu = "SELECT * FROM {$bean->rel_users_table} WHERE deleted = 0 AND {$lower_name}_id = '{$id}'";
        $re = $db->query($qu);
        $users_rel_arr = array();
        while ($ro = $db->fetchByAssoc($re)) {
            $users_rel_arr[] = $ro['user_id'];
        }
        $qu_users = "
				INSERT INTO {$bean->rel_users_table}
				(id,user_id,{$lower_name}_id,date_modified)
				VALUES
		";
        $users_filled = false;

        $qu = "SELECT * FROM {$bean->rel_contacts_table} WHERE deleted = 0 AND {$lower_name}_id = '{$id}'";
        $re = $db->query($qu);
        $contacts_rel_arr = array();
        while ($ro = $db->fetchByAssoc($re)) {
            $contacts_rel_arr[] = $ro['contact_id'];
        }
        $qu_contacts = "
				INSERT INTO {$bean->rel_contacts_table}
				(id,contact_id,{$lower_name}_id,date_modified)
				VALUES
		";
        $contacts_filled = false;

        $qu = "SELECT * FROM {$bean->rel_leads_table} WHERE deleted = 0 AND {$lower_name}_id = '{$id}'";
        $re = $db->query($qu);
        $leads_rel_arr = array();
        while ($ro = $db->fetchByAssoc($re)) {
            $leads_rel_arr[] = $ro['lead_id'];
        }
        $qu_leads = "
				INSERT INTO {$bean->rel_leads_table}
				(id,lead_id,{$lower_name}_id,date_modified)
				VALUES
		";
        $leads_filled = false;

        $arr = array();
        $i = 0;
        foreach ($time_arr as $date_start) {
            $clone = $bean;	// we don't use clone keyword cause not necessary
            $clone->id = "";
            $clone->date_start = $date_start;
            // TODO CHECK DATETIME VARIABLE
            $date = SugarDateTime::createFromFormat($GLOBALS['timedate']->get_date_time_format(), $date_start);
            $date = $date->get("+{$bean->duration_hours} Hours")->get("+{$bean->duration_minutes} Minutes");
            $date_end = $date->format($GLOBALS['timedate']->get_date_time_format());
            $clone->date_end = $date_end;
            $clone->recurring_source = "Sugar";
            $clone->repeat_parent_id = $id;
            $clone->update_vcal = false;
            $clone->save(false);

            if ($clone->id) {
                foreach ($users_rel_arr as $user_id) {
                    if ($users_filled) {
                        $qu_users .= ",".PHP_EOL;
                    }
                    $qu_users .= "('".create_guid()."','{$user_id}','{$clone->id}','{$date_modified}')";
                    $users_filled = true;
                }
                foreach ($contacts_rel_arr as $contact_id) {
                    if ($contacts_filled) {
                        $qu_contacts .= ",".PHP_EOL;
                    }
                    $qu_contacts .= "('".create_guid()."','{$contact_id}','{$clone->id}','{$date_modified}')";
                    $contacts_filled = true;
                }
                foreach ($leads_rel_arr as $lead_id) {
                    if ($leads_filled) {
                        $qu_leads .= ",".PHP_EOL;
                    }
                    $qu_leads .= "('".create_guid()."','{$lead_id}','{$clone->id}','{$date_modified}')";
                    $leads_filled = true;
                }
                if ($i < 44) {
                    $clone->date_start = $date_start;
                    $clone->date_end = $date_end;
                    $arr[] = array_merge(array('id' => $clone->id), CalendarUtils::get_time_data($clone));
                }
                $i++;
            }
        }

        if ($users_filled) {
            $db->query($qu_users);
        }
        if ($contacts_filled) {
            $db->query($qu_contacts);
        }
        if ($leads_filled) {
            $db->query($qu_leads);
        }

        vCal::cache_sugar_vcal($GLOBALS['current_user']);
        return $arr;
    }

    /**
     * Delete recurring activities and their invitee relationships
     * @param SugarBean $bean
     */
    public static function markRepeatDeleted(SugarBean $bean)
    {
        // we don't use mark_deleted method here because it runs very slowly
        $db = DBManagerFactory::getInstance();
        $date_modified = $GLOBALS['timedate']->nowDb();
        if (!empty($GLOBALS['current_user'])) {
            $modified_user_id = $GLOBALS['current_user']->id;
        } else {
            $modified_user_id = 1;
        }
        $lower_name = strtolower($bean->object_name);

        $qu = "SELECT id FROM {$bean->table_name} WHERE repeat_parent_id = '{$bean->id}' AND deleted = 0";
        $re = $db->query($qu);
        while ($ro = $db->fetchByAssoc($re)) {
            $id = $ro['id'];
            $date_modified = $GLOBALS['timedate']->nowDb();
            $db->query("UPDATE {$bean->table_name} SET deleted = 1, date_modified = '{$date_modified}', modified_user_id = '{$modified_user_id}' WHERE id = '{$id}'");
            $db->query("UPDATE {$bean->rel_users_table} SET deleted = 1, date_modified = '{$date_modified}' WHERE {$lower_name}_id = '{$id}'");
            $db->query("UPDATE {$bean->rel_contacts_table} SET deleted = 1, date_modified = '{$date_modified}' WHERE {$lower_name}_id = '{$id}'");
            $db->query("UPDATE {$bean->rel_leads_table} SET deleted = 1, date_modified = '{$date_modified}' WHERE {$lower_name}_id = '{$id}'");
        }
        vCal::cache_sugar_vcal($GLOBALS['current_user']);
    }

    /**
     * check if meeting has repeat children and pass repeat_parent over to the 2nd meeting in sequence
     * @param SugarBean $bean
     * @param string $beanId
     */
    public static function correctRecurrences(SugarBean $bean, $beanId)
    {
        $db = DBManagerFactory::getInstance();

        $qu = "SELECT id FROM {$bean->table_name} WHERE repeat_parent_id = '{$beanId}' AND deleted = 0 ORDER BY date_start";
        $re = $db->query($qu);

        $i = 0;
        while ($ro = $db->fetchByAssoc($re)) {
            $id = $ro['id'];
            if ($i == 0) {
                $new_parent_id = $id;
                $qu = "UPDATE {$bean->table_name} SET repeat_parent_id = '' AND recurring_source = '' WHERE id = '{$id}'";
            } else {
                $qu = "UPDATE {$bean->table_name} SET repeat_parent_id = '{$new_parent_id}' WHERE id = '{$id}'";
            }
            $db->query($qu);
            $i++;
        }
    }
}