mirror of
https://github.com/itflow-org/itflow
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524 lines
22 KiB
PHP
524 lines
22 KiB
PHP
<?php
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/*
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* ITFlow - Ticket SLA helpers
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*
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* SLAs are optional at every level. A ticket only gets SLA targets when an
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* assignment resolves for its client + priority (client-level assignments win,
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* client 0 rows are the global default, and an assignment pointing at SLA 0 is
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* an explicit "no SLA" override). Tickets with ticket_sla_id = 0 are simply
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* ignored by the SLA cron, the list highlighting and the reports.
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*
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* Deadlines are computed ONCE at write time (creation / priority change /
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* client change / manual SLA change) and stored on the ticket as
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* ticket_response_due_at / ticket_resolution_due_at, so the ticket list and
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* cron/ticket_sla.php only ever compare datetimes - no business-hours math at
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* render time.
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*/
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// Business hours + SLA settings, fetched once per request
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function getSlaSettings($refresh = false)
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{
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global $mysqli;
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static $sla_settings = null;
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// Callers that have just written to the settings row pass true - otherwise
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// they would restamp tickets using the business hours this request started
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// with rather than the ones just saved
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if ($refresh) {
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$sla_settings = null;
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}
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if (!is_null($sla_settings)) {
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return $sla_settings;
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}
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$sql = mysqli_query($mysqli, "SELECT config_business_days, config_business_hours_start, config_business_hours_end, config_sla_warning_percent, config_sla_notification_email, config_ticket_from_name, config_ticket_from_email, config_mail_from_email, config_mail_from_name FROM settings WHERE company_id = 1");
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$row = mysqli_fetch_assoc($sql);
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// ISO weekday numbers (1 = Monday .. 7 = Sunday)
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$business_days = [];
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foreach (explode(',', strval($row['config_business_days'])) as $day) {
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$day = intval($day);
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if ($day >= 1 && $day <= 7) {
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$business_days[] = $day;
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}
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}
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$sla_settings = [
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'business_days' => $business_days,
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'business_hours_start' => $row['config_business_hours_start'],
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'business_hours_end' => $row['config_business_hours_end'],
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'warning_percent' => intval($row['config_sla_warning_percent']),
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'notification_email' => $row['config_sla_notification_email'],
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'ticket_from_name' => $row['config_ticket_from_name'] ?: $row['config_mail_from_name'],
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'ticket_from_email' => $row['config_ticket_from_email'] ?: $row['config_mail_from_email'],
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];
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return $sla_settings;
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}
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// Add $minutes of business time to a datetime, honouring the configured
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// business days and hours. Returns a Y-m-d H:i:s string in the app timezone
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// (includes/inc_set_timezone.php has already set it). With no usable business
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// calendar configured the clock is treated as 24x7.
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function addBusinessMinutes($start_datetime, $minutes)
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{
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$minutes = intval($minutes);
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$cursor = new DateTime($start_datetime);
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if ($minutes <= 0) {
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return $cursor->format('Y-m-d H:i:s');
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}
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$sla_settings = getSlaSettings();
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$business_days = $sla_settings['business_days'];
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$day_start = $sla_settings['business_hours_start'];
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$day_end = $sla_settings['business_hours_end'];
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if (empty($business_days) || empty($day_start) || empty($day_end) || $day_start >= $day_end) {
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$cursor->modify("+$minutes minutes");
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return $cursor->format('Y-m-d H:i:s');
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}
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$remaining_seconds = $minutes * 60;
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// Walk forward a day at a time consuming available business time. Interval
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// math is done on timestamps (real elapsed time), window edges by wall
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// clock - so a DST-shortened business day yields less SLA time, which is
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// the honest reading. Guard: two years of calendar.
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for ($i = 0; $i < 731; $i++) {
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if (in_array(intval($cursor->format('N')), $business_days)) {
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$window_start = new DateTime($cursor->format('Y-m-d') . " $day_start");
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$window_end = new DateTime($cursor->format('Y-m-d') . " $day_end");
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if ($cursor < $window_start) {
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$cursor = $window_start;
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}
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if ($cursor < $window_end) {
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$available_seconds = $window_end->getTimestamp() - $cursor->getTimestamp();
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if ($remaining_seconds <= $available_seconds) {
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$cursor->setTimestamp($cursor->getTimestamp() + $remaining_seconds);
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return $cursor->format('Y-m-d H:i:s');
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}
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$remaining_seconds -= $available_seconds;
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}
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}
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// Start of the next calendar day
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$cursor = new DateTime($cursor->format('Y-m-d') . ' 00:00:00');
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$cursor->modify('+1 day');
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}
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// Unreachable with a sane configuration - fail open rather than loop
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$cursor->setTimestamp($cursor->getTimestamp() + $remaining_seconds);
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return $cursor->format('Y-m-d H:i:s');
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}
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// Business minutes elapsed between two datetimes - the inverse of
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// addBusinessMinutes, used to measure how much of a resolution budget an
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// interval actually consumed.
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function businessMinutesBetween($start_datetime, $end_datetime)
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{
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$start = new DateTime($start_datetime);
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$end = new DateTime($end_datetime);
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if ($end <= $start) {
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return 0;
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}
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$sla_settings = getSlaSettings();
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$business_days = $sla_settings['business_days'];
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$day_start = $sla_settings['business_hours_start'];
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$day_end = $sla_settings['business_hours_end'];
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if (empty($business_days) || empty($day_start) || empty($day_end) || $day_start >= $day_end) {
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return intval(floor(($end->getTimestamp() - $start->getTimestamp()) / 60));
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}
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$seconds = 0;
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$cursor = clone $start;
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// Sum the overlap between the interval and each day's business window
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for ($i = 0; $i < 731; $i++) {
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if ($cursor > $end) {
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break;
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}
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if (in_array(intval($cursor->format('N')), $business_days)) {
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$window_start = new DateTime($cursor->format('Y-m-d') . " $day_start");
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$window_end = new DateTime($cursor->format('Y-m-d') . " $day_end");
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$from = $cursor > $window_start ? $cursor : $window_start;
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$to = $end < $window_end ? $end : $window_end;
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if ($to > $from) {
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$seconds += $to->getTimestamp() - $from->getTimestamp();
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}
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}
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$cursor = new DateTime($cursor->format('Y-m-d') . ' 00:00:00');
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$cursor->modify('+1 day');
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}
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return intval(floor($seconds / 60));
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}
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// Business minutes already spent on a ticket's resolution clock, including the
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// interval currently running.
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//
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// Tickets with no clock history at all fall back to the business time elapsed
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// since they were raised. Only tickets carrying a resolution target get
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// intervals, so this covers response-only plans, and tickets that were already
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// resolved when SLA pausing was introduced. Without the fallback both report
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// zero time spent, which reads as instant resolution.
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function getTicketSlaConsumedMinutes($ticket_id)
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{
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global $mysqli;
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$ticket_id = intval($ticket_id);
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$consumed = 0;
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$has_history = false;
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$sql = mysqli_query($mysqli, "SELECT sla_history_started_at, sla_history_ended_at, sla_history_minutes FROM sla_history WHERE sla_history_ticket_id = $ticket_id");
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while ($row = mysqli_fetch_assoc($sql)) {
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$has_history = true;
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if (!is_null($row['sla_history_ended_at'])) {
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$consumed += intval($row['sla_history_minutes']);
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} else {
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$consumed += businessMinutesBetween($row['sla_history_started_at'], date('Y-m-d H:i:s'));
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}
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}
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if (!$has_history) {
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$ticket_sql = mysqli_query($mysqli, "SELECT ticket_created_at, ticket_resolved_at, ticket_closed_at FROM tickets WHERE ticket_id = $ticket_id LIMIT 1");
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if (!$ticket_sql || !mysqli_num_rows($ticket_sql)) {
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return 0;
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}
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$ticket = mysqli_fetch_assoc($ticket_sql);
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$ended_at = $ticket['ticket_resolved_at'] ?: ($ticket['ticket_closed_at'] ?: date('Y-m-d H:i:s'));
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return businessMinutesBetween($ticket['ticket_created_at'], $ended_at);
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}
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return $consumed;
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}
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// How many times a ticket's clock has been stopped. Zero means it has run
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// continuously since creation, so its deadline is still simply creation plus
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// the budget - the same answer pausing-free installs have always had.
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function getTicketSlaPausedCount($ticket_id)
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{
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global $mysqli;
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$ticket_id = intval($ticket_id);
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$row = mysqli_fetch_assoc(mysqli_query($mysqli, "SELECT COUNT(sla_history_id) AS paused_count FROM sla_history WHERE sla_history_ticket_id = $ticket_id AND sla_history_ended_at IS NOT NULL"));
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return intval($row['paused_count']);
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}
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// Colour an SLA compliance percentage for the reports. Null means nothing has
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// been judged yet, which is not the same as zero.
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function slaPercentDisplay($percent)
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{
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if (is_null($percent)) {
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return "<span class='text-secondary'>-</span>";
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}
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if ($percent >= 95) {
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return "<span class='text-success text-bold'>$percent%</span>";
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}
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if ($percent >= 80) {
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return "<span class='text-warning text-bold'>$percent%</span>";
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}
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return "<span class='text-danger text-bold'>$percent%</span>";
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}
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// Reconcile a ticket's resolution clock with its current status. Safe to call
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// after any status change (and after applyTicketSla) - it opens an interval
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// when the clock should be running, closes it when it should not, and on
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// resume re-bases the resolution deadline on the remaining budget. The response
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// clock is deliberately never paused: a ticket cannot wait on a client before
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// anyone has replied to it.
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function syncTicketSlaClock($ticket_id)
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{
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global $mysqli;
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$ticket_id = intval($ticket_id);
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$sql = mysqli_query($mysqli, "SELECT ticket_sla_id, ticket_created_at, ticket_resolved_at, ticket_closed_at, ticket_archived_at, ticket_resolution_sla_alert_stage, sla_resolution_minutes, ticket_status_pauses_sla
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FROM tickets
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LEFT JOIN slas ON ticket_sla_id = sla_id
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LEFT JOIN ticket_statuses ON ticket_status = ticket_status_id
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WHERE ticket_id = $ticket_id
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LIMIT 1"
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);
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if (!$sql || !mysqli_num_rows($sql)) {
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return;
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}
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$row = mysqli_fetch_assoc($sql);
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$open_sql = mysqli_query($mysqli, "SELECT sla_history_id, sla_history_started_at FROM sla_history WHERE sla_history_ticket_id = $ticket_id AND sla_history_ended_at IS NULL ORDER BY sla_history_id DESC LIMIT 1");
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$open_interval = mysqli_num_rows($open_sql) ? mysqli_fetch_assoc($open_sql) : null;
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// Only tickets carrying a resolution target have a clock to track
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$resolution_minutes = intval($row['sla_resolution_minutes']);
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$tracked = intval($row['ticket_sla_id']) > 0 && $resolution_minutes > 0;
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$should_run = $tracked
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&& empty($row['ticket_resolved_at'])
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&& empty($row['ticket_closed_at'])
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&& empty($row['ticket_archived_at'])
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&& intval($row['ticket_status_pauses_sla']) == 0;
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if ($should_run && is_null($open_interval)) {
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// Prior intervals mean this is a resume, so the deadline moves out by
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// whatever budget is left rather than staying where it was
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$had_history = getTicketSlaPausedCount($ticket_id) > 0;
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$consumed = $had_history ? getTicketSlaConsumedMinutes($ticket_id) : 0;
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// The very first interval is anchored to the ticket's creation time, not
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// to now - otherwise a backdated ticket would start life with its whole
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// budget intact and re-stamping it would keep handing that budget back
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$interval_start = $had_history ? date('Y-m-d H:i:s') : escapeSql($row['ticket_created_at']);
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mysqli_query($mysqli, "INSERT INTO sla_history SET sla_history_started_at = '$interval_start', sla_history_ticket_id = $ticket_id");
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if ($had_history) {
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$remaining = $resolution_minutes - $consumed;
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if ($remaining < 0) {
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$remaining = 0;
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}
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$resolution_due_at = addBusinessMinutes(date('Y-m-d H:i:s'), $remaining);
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// A ticket that already breached stays breached
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$alert_stage = intval($row['ticket_resolution_sla_alert_stage']) == 2 ? 2 : 0;
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mysqli_query($mysqli, "UPDATE tickets SET ticket_resolution_due_at = '$resolution_due_at', ticket_resolution_sla_alert_stage = $alert_stage WHERE ticket_id = $ticket_id");
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}
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} elseif (!$should_run && !is_null($open_interval)) {
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$interval_id = intval($open_interval['sla_history_id']);
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$minutes = businessMinutesBetween($open_interval['sla_history_started_at'], date('Y-m-d H:i:s'));
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mysqli_query($mysqli, "UPDATE sla_history SET sla_history_ended_at = NOW(), sla_history_minutes = $minutes WHERE sla_history_id = $interval_id");
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}
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}
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// Resolve which SLA (if any) applies to a client + priority combination.
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// Returns an sla_id, or 0 when no SLA applies.
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function getTicketSlaId($client_id, $priority)
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{
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global $mysqli;
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$client_id = intval($client_id);
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$priority = escapeSql($priority);
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$sla_id = null;
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// Client-level assignment wins; a row pointing at SLA 0 is an explicit
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// "no SLA for this client/priority" override of the global default
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if ($client_id > 0) {
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$sql = mysqli_query($mysqli, "SELECT sla_assignment_sla_id FROM sla_assignments WHERE sla_assignment_client_id = $client_id AND sla_assignment_priority = '$priority' LIMIT 1");
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if (mysqli_num_rows($sql)) {
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$sla_id = intval(mysqli_fetch_assoc($sql)['sla_assignment_sla_id']);
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}
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}
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// Fall back to the global default (client 0)
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if (is_null($sla_id)) {
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$sql = mysqli_query($mysqli, "SELECT sla_assignment_sla_id FROM sla_assignments WHERE sla_assignment_client_id = 0 AND sla_assignment_priority = '$priority' LIMIT 1");
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if (mysqli_num_rows($sql)) {
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$sla_id = intval(mysqli_fetch_assoc($sql)['sla_assignment_sla_id']);
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}
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}
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if (empty($sla_id)) {
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return 0;
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}
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// Ignore assignments pointing at archived SLAs
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$sql = mysqli_query($mysqli, "SELECT sla_id FROM slas WHERE sla_id = $sla_id AND sla_archived_at IS NULL LIMIT 1");
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if (!mysqli_num_rows($sql)) {
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return 0;
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}
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return $sla_id;
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}
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// Stamp (or re-stamp) a ticket's SLA and computed due dates. Call after ticket
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// creation and after anything that changes which SLA applies (priority edit,
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// client change, manual SLA change). Pass $forced_sla_id to pin a specific SLA
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// (0 = explicitly none) instead of resolving from the assignments.
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function applyTicketSla($ticket_id, $forced_sla_id = null)
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{
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global $mysqli;
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$ticket_id = intval($ticket_id);
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$sql = mysqli_query($mysqli, "SELECT ticket_client_id, ticket_priority, ticket_created_at, ticket_first_response_at, ticket_resolved_at FROM tickets WHERE ticket_id = $ticket_id LIMIT 1");
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if (!$sql || !mysqli_num_rows($sql)) {
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return;
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}
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$row = mysqli_fetch_assoc($sql);
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if (is_null($forced_sla_id)) {
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$sla_id = getTicketSlaId($row['ticket_client_id'], $row['ticket_priority']);
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} else {
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$sla_id = intval($forced_sla_id);
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}
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// No SLA applies - clear any previous targets
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if ($sla_id == 0) {
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mysqli_query($mysqli, "UPDATE tickets SET ticket_sla_id = 0, ticket_response_due_at = NULL, ticket_resolution_due_at = NULL, ticket_response_sla_met = NULL, ticket_resolution_sla_met = NULL, ticket_response_sla_alert_stage = 0, ticket_resolution_sla_alert_stage = 0 WHERE ticket_id = $ticket_id");
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syncTicketSlaClock($ticket_id);
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return;
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}
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$sla_sql = mysqli_query($mysqli, "SELECT sla_response_minutes, sla_resolution_minutes FROM slas WHERE sla_id = $sla_id LIMIT 1");
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if (!$sla_sql || !mysqli_num_rows($sla_sql)) {
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return;
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}
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$sla = mysqli_fetch_assoc($sla_sql);
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$created_at = $row['ticket_created_at'];
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$response_due_at = addBusinessMinutes($created_at, $sla['sla_response_minutes']);
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$resolution_due_at = null;
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$resolution_due_at_set = "NULL";
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if (intval($sla['sla_resolution_minutes']) > 0) {
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// Once a ticket has been paused the budget is measured from what was
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// actually consumed, so paused time is not silently handed back. A
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// ticket that has only ever run keeps its original creation-anchored
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// deadline, including when that deadline is already in the past.
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if (getTicketSlaPausedCount($ticket_id) > 0) {
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$remaining = intval($sla['sla_resolution_minutes']) - getTicketSlaConsumedMinutes($ticket_id);
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if ($remaining < 0) {
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$remaining = 0;
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}
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$resolution_due_at = addBusinessMinutes(date('Y-m-d H:i:s'), $remaining);
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} else {
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$resolution_due_at = addBusinessMinutes($created_at, $sla['sla_resolution_minutes']);
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}
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$resolution_due_at_set = "'$resolution_due_at'";
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}
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// Re-judge met flags for milestones already reached; alert stages reset so
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// the SLA cron re-evaluates pending milestones against the new targets
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$response_met_set = "NULL";
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if (!empty($row['ticket_first_response_at'])) {
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$response_met_set = strtotime($row['ticket_first_response_at']) <= strtotime($response_due_at) ? 1 : 0;
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}
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$resolution_met_set = "NULL";
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if (!empty($row['ticket_resolved_at']) && !is_null($resolution_due_at)) {
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$resolution_met_set = strtotime($row['ticket_resolved_at']) <= strtotime($resolution_due_at) ? 1 : 0;
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}
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mysqli_query($mysqli, "UPDATE tickets SET ticket_sla_id = $sla_id, ticket_response_due_at = '$response_due_at', ticket_resolution_due_at = $resolution_due_at_set, ticket_response_sla_met = $response_met_set, ticket_resolution_sla_met = $resolution_met_set, ticket_response_sla_alert_stage = 0, ticket_resolution_sla_alert_stage = 0 WHERE ticket_id = $ticket_id");
|
|
|
|
syncTicketSlaClock($ticket_id);
|
|
}
|
|
|
|
// Record the ticket's first response (if not already recorded) and judge the
|
|
// response SLA against the stored due date. Replaces the previous inline
|
|
// ticket_first_response_at updates so the SLA verdict can never drift from
|
|
// the timestamp.
|
|
function setTicketFirstResponse($ticket_id)
|
|
{
|
|
global $mysqli;
|
|
|
|
$ticket_id = intval($ticket_id);
|
|
|
|
$sql = mysqli_query($mysqli, "SELECT ticket_first_response_at, ticket_response_due_at FROM tickets WHERE ticket_id = $ticket_id LIMIT 1");
|
|
if (!$sql || !mysqli_num_rows($sql)) {
|
|
return;
|
|
}
|
|
$row = mysqli_fetch_assoc($sql);
|
|
|
|
if (!empty($row['ticket_first_response_at'])) {
|
|
return;
|
|
}
|
|
|
|
$response_met_set = "NULL";
|
|
if (!empty($row['ticket_response_due_at'])) {
|
|
$response_met_set = time() <= strtotime($row['ticket_response_due_at']) ? 1 : 0;
|
|
}
|
|
|
|
mysqli_query($mysqli, "UPDATE tickets SET ticket_first_response_at = NOW(), ticket_response_sla_met = $response_met_set WHERE ticket_id = $ticket_id");
|
|
}
|
|
|
|
// Judge the resolution SLA when a ticket is resolved (or closed without being
|
|
// resolved, which also stops the clock). No-op for tickets without a
|
|
// resolution target.
|
|
function setTicketResolutionSlaMet($ticket_id)
|
|
{
|
|
global $mysqli;
|
|
|
|
$ticket_id = intval($ticket_id);
|
|
|
|
$sql = mysqli_query($mysqli, "SELECT ticket_resolution_due_at, ticket_resolved_at, ticket_resolution_sla_met FROM tickets WHERE ticket_id = $ticket_id LIMIT 1");
|
|
if (!$sql || !mysqli_num_rows($sql)) {
|
|
return;
|
|
}
|
|
$row = mysqli_fetch_assoc($sql);
|
|
|
|
if (empty($row['ticket_resolution_due_at'])) {
|
|
return;
|
|
}
|
|
|
|
// A recorded miss is final at judge time. Reopening an exhausted ticket
|
|
// re-bases its deadline to the present, so without this a resolve in the
|
|
// same clock second would grade against that deadline and flip the miss
|
|
// to a met. Only an explicit re-stamp (applyTicketSla) may re-judge.
|
|
if (!is_null($row['ticket_resolution_sla_met']) && intval($row['ticket_resolution_sla_met']) === 0) {
|
|
syncTicketSlaClock($ticket_id);
|
|
return;
|
|
}
|
|
|
|
$ended_at = !empty($row['ticket_resolved_at']) ? strtotime($row['ticket_resolved_at']) : time();
|
|
$resolution_met = $ended_at <= strtotime($row['ticket_resolution_due_at']) ? 1 : 0;
|
|
|
|
mysqli_query($mysqli, "UPDATE tickets SET ticket_resolution_sla_met = $resolution_met WHERE ticket_id = $ticket_id");
|
|
|
|
syncTicketSlaClock($ticket_id);
|
|
}
|
|
|
|
// A reopened ticket goes back on the resolution clock. syncTicketSlaClock
|
|
// reopens an interval and re-bases the deadline on the budget that is left, so
|
|
// a ticket that was resolved with time to spare gets that remainder back.
|
|
//
|
|
// A missed verdict survives the reopen when the budget is already spent.
|
|
// Without this, re-basing would hand an exhausted ticket a zero-length fresh
|
|
// window, and resolving it again straight away would overwrite the recorded
|
|
// miss with a met - reopen must never be a way to launder a breach.
|
|
function resetTicketResolutionSla($ticket_id)
|
|
{
|
|
global $mysqli;
|
|
|
|
$ticket_id = intval($ticket_id);
|
|
|
|
$sql = mysqli_query($mysqli, "SELECT ticket_resolution_sla_met, sla_resolution_minutes FROM tickets LEFT JOIN slas ON ticket_sla_id = sla_id WHERE ticket_id = $ticket_id LIMIT 1");
|
|
if ($sql && mysqli_num_rows($sql)) {
|
|
$row = mysqli_fetch_assoc($sql);
|
|
$resolution_minutes = intval($row['sla_resolution_minutes']);
|
|
$was_missed = !is_null($row['ticket_resolution_sla_met']) && intval($row['ticket_resolution_sla_met']) === 0;
|
|
|
|
if ($was_missed && $resolution_minutes > 0 && getTicketSlaConsumedMinutes($ticket_id) >= $resolution_minutes) {
|
|
// Budget gone: keep the miss and the breach stage (so the cron does
|
|
// not re-alert), just restart the clock for the time-spent record
|
|
syncTicketSlaClock($ticket_id);
|
|
return;
|
|
}
|
|
}
|
|
|
|
mysqli_query($mysqli, "UPDATE tickets SET ticket_resolution_sla_met = NULL, ticket_resolution_sla_alert_stage = 0 WHERE ticket_id = $ticket_id");
|
|
|
|
syncTicketSlaClock($ticket_id);
|
|
}
|