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<?php
/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
namespace Icinga\Module\Monitoring\Timeline;
use StdClass;
use Iterator;
use DateTime;
use DateInterval;
use Icinga\Util\Format;
/**
* A range of time split into a specific interval
*
* @see Iterator
*/
class TimeRange implements Iterator
{
/**
* The start of this time range
*
* @var DateTime
*/
protected $start;
/**
* The end of this time range
*
* @var DateTime
*/
protected $end;
/**
* The interval by which this time range is split
*
* @var DateInterval
*/
protected $interval;
/**
* The current date in the iteration
*
* @var DateTime
*/
protected $current;
/**
* Whether the date iteration is negative
*
* @var bool
*/
protected $negative;
/**
* Initialize a new time range
*
* @param DateTime $start When the time range should start
* @param DateTime $end When the time range should end
* @param DateInterval $interval The interval of the time range
*/
public function __construct(DateTime $start, DateTime $end, DateInterval $interval)
{
$this->interval = $interval;
$this->start = $start;
$this->end = $end;
$this->negative = $this->start > $this->end;
}
/**
* Return when this range of time starts
*
* @return DateTime
*/
public function getStart()
{
return $this->start;
}
/**
* Return when this range of time ends
*
* @return DateTime
*/
public function getEnd()
{
return $this->end;
}
/**
* Return the interval by which this time range is split
*
* @return DateInterval
*/
public function getInterval()
{
return $this->interval;
}
/**
* Return the appropriate timeframe for the given date and time or null if none could be found
*
* @param DateTime $dateTime The date and time for which to search the timeframe
* @param bool $asTimestamp Whether the start of the timeframe should be returned as timestamp
* @return StdClass|int An object with a ´start´ and ´end´ property or a timestamp
*/
public function findTimeframe(DateTime $dateTime, $asTimestamp = false)
{
foreach ($this as $timeframeIdentifier => $timeframe) {
if ($this->negative) {
if ($dateTime <= $timeframe->start && $dateTime >= $timeframe->end) {
return $asTimestamp ? $timeframeIdentifier : $timeframe;
}
} elseif ($dateTime >= $timeframe->start && $dateTime <= $timeframe->end) {
return $asTimestamp ? $timeframeIdentifier : $timeframe;
}
}
}
/**
* Return whether the given time is within this range of time
*
* @param string|int|DateTime $time The timestamp or date and time to check
*/
public function validateTime($time)
{
if ($time instanceof DateTime) {
$dateTime = $time;
} elseif (is_string($time)) {
$dateTime = DateTime::createFromFormat('d/m/Y g:i A', $time);
} else {
$dateTime = new DateTime();
$dateTime->setTimestamp($time);
}
return ($this->negative && ($dateTime <= $this->start && $dateTime >= $this->end)) ||
(!$this->negative && ($dateTime >= $this->start && $dateTime <= $this->end));
}
/**
* Return the appropriate timeframe for the given timeframe start
*
* @param int|DateTime $time The timestamp or date and time for which to return the timeframe
* @return StdClass An object with a ´start´ and ´end´ property
*/
public function getTimeframe($time)
{
if ($time instanceof DateTime) {
$startTime = clone $time;
} else {
$startTime = new DateTime();
$startTime->setTimestamp($time);
}
return $this->buildTimeframe($startTime, $this->applyInterval(clone $startTime, 1));
}
/**
* Apply the current interval to the given date and time
*
* @param DateTime $dateTime The date and time to apply the interval to
* @param int $adjustBy By how much seconds the resulting date and time should be adjusted
*
* @return DateTime
*/
protected function applyInterval(DateTime $dateTime, $adjustBy)
{
if (!$this->interval->y && !$this->interval->m) {
if ($this->negative) {
return $dateTime->sub($this->interval)->add(new DateInterval('PT' . $adjustBy . 'S'));
} else {
return $dateTime->add($this->interval)->sub(new DateInterval('PT' . $adjustBy . 'S'));
}
} elseif ($this->interval->m) {
for ($i = 0; $i < $this->interval->m; $i++) {
if ($this->negative) {
$dateTime->sub(new DateInterval('PT' . Format::secondsByMonth($dateTime) . 'S'));
} else {
$dateTime->add(new DateInterval('PT' . Format::secondsByMonth($dateTime) . 'S'));
}
}
} elseif ($this->interval->y) {
for ($i = 0; $i < $this->interval->y; $i++) {
if ($this->negative) {
$dateTime->sub(new DateInterval('PT' . Format::secondsByYear($dateTime) . 'S'));
} else {
$dateTime->add(new DateInterval('PT' . Format::secondsByYear($dateTime) . 'S'));
}
}
}
$adjustment = new DateInterval('PT' . $adjustBy . 'S');
return $this->negative ? $dateTime->add($adjustment) : $dateTime->sub($adjustment);
}
/**
* Return an object representation of the given timeframe
*
* @param DateTime $start The start of the timeframe
* @param DateTime $end The end of the timeframe
* @return StdClass
*/
protected function buildTimeframe(DateTime $start, DateTime $end)
{
$timeframe = new StdClass();
$timeframe->start = $start;
$timeframe->end = $end;
return $timeframe;
}
/**
* Reset the iterator to its initial state
*/
public function rewind(): void
{
$this->current = clone $this->start;
}
/**
* Return whether the current iteration step is valid
*
* @return bool
*/
public function valid(): bool
{
if ($this->negative) {
return $this->current > $this->end;
} else {
return $this->current < $this->end;
}
}
/**
* Return the current value in the iteration
*
* @return StdClass
*/
public function current(): object
{
return $this->getTimeframe($this->current);
}
/**
* Return a unique identifier for the current value in the iteration
*
* @return int
*/
public function key(): int
{
return $this->current->getTimestamp();
}
/**
* Advance the iterator position by one
*/
public function next(): void
{
$this->applyInterval($this->current, 0);
}
}
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