gpslab / interval
DDD interval structures
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Requires
- php: >=5.6.0
Requires (Dev)
- doctrine/dbal: ^2.2
- phpunit/phpunit: ^5.7 || ^6.0
- scrutinizer/ocular: ~1.3
README
Interval Value Objects
This is a library with a set of classes intended to describe intervals as Value Objects and perform operations on them.
Installation
Pretty simple with Composer, run:
composer require gpslab/interval
Interval type
This library is supports interval types.
[a, b] = [a, b] = {x ∈ ℝ | a ≤ x ≤ b}
- Closed[a, b) = [a, b[ = {x ∈ ℝ | a ≤ x < b}
- Half-closed(a, b] = ]a, b] = {x ∈ ℝ | a < x ≤ b}
- Half-open(a, b) = ]a, b[ = {x ∈ ℝ | a < x < b}
- Open
Intervals
- Number
- Date
- Time
- DateTime
- Week
- Month
- Year
- IPv4
- IPv6
- IPv4Network
- IPv6Network
Usage intervals
Create interval [1, 5)
$interval = NumberInterval::halfClosed(1, 5); echo $interval->start(); // 1 echo $interval->end(); // 5 // convert to string $string = (string)$interval; echo $string; // [1, 5) // restore from string $new_interval = NumberInterval::fromString($string); $interval == $new_interval; // true $interval->equal($new_interval); // true
Change intervals
$interval = NumberInterval::halfClosed(1, 5); // created a new interval instance $new_interval = $interval->withStart(new NumberIntervalPoint(2)); $interval->start() != $new_interval->start(); // true
IPv4 network
// from CIDR $network = IPv4Network::fromCIDR('192.168.0.0', 16); echo $network->start(); // 192.168.0.0 echo $network->end(); // 192.168.255.255 $network->contains('192.168.13.74'); // true // from ip mask $new_network = IPv4Network::fromMask('192.168.0.0', '255.255.0.0'); $network->equal($new_network); // true
Local network
function isLocalNetworkHost($host) { // is IPv6 if (strpos($host, ':') !== false) { // RFC 4193 return IPv6Network::fromString('fc00::/7')->contains($host); } // RFC 1918 return IPv4Network::fromString('10/8')->contains($host) || IPv4Network::fromString('172.16/12')->contains($host) || IPv4Network::fromString('192.168/16')->contains($host) ; }
Interval operations
equal
- Checks if this Interval is equal to the specified interval;contains
- Does this interval contain the specified point;intersects
- Does this interval intersect the specified interval;intersection
- Gets the intersection between this interval and another interval;cover
- Gets the covered interval between this Interval and another interval;gap
- Gets the gap between this interval and another interval;abuts
- Does this interval abut with the interval specified;join
- Joins the interval between the adjacent;union
- Gets the union between this interval and another interval;before
- The point is before the interval;after
- The point is after the interval.
Iterate intervals
The following intervals support iteration:
- Number
- Date
- Time
- DateTime
- Week
- Month
- Year
- IPv4
- IPv4Network
Example usage
Use step 1
and closed interval type [1, 5]
$interval = NumberInterval::closed(1, 5); $points_in_interval = []; foreach ($interval->iterate() as $point) { $points_in_interval[] = $point; } $points_in_interval == [1, 2, 3, 4, 5]; // true
Use step 2
and open interval type (0, 10)
$step = 2; $interval = NumberInterval::open(0, 10); $points_in_interval = []; foreach ($interval->iterate($step) as $point) { $points_in_interval[] = $point; } $points_in_interval == [2, 4, 6, 8]; // true
Iterate IPv4 interval
$expected = [ '10.0.1.2', '10.0.1.4', '10.0.1.6', '10.0.1.8' ]; $step = 2; $interval = IPv4Interval::open('10.0.1.0', '10.0.1.10'); $points_in_interval = []; foreach ($interval->iterate($step) as $point) { $points_in_interval[] = $point; } $points_in_interval == $expected; // true
Iterate date interval
$expected = [ '2017-03-03', '2017-03-05', '2017-03-07', '2017-03-09', ]; $step = new \DateInterval('P2D'); $interval = DateInterval::open(new \DateTime('2017-03-01'), new \DateTime('2017-03-11')); $points_in_interval = []; foreach ($interval->iterate($step) as $point) { $points_in_interval[] = $point->format('Y-m-d'); } $points_in_interval == $expected; // true
Persistence in Doctrine
You cat use intervals as Custom Mapping Types for Doctrine.
Type::addType('NumberInterval', 'GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\NumberIntervalType'); $em->getConnection()->getDatabasePlatform()->registerDoctrineTypeMapping('NumberInterval', 'NumberInterval');
You cat registration custom Doctrine mapping types in Symfony
# config/packages/doctrine.yml doctrine: dbal: types: NumberInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\NumberIntervalType DateInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\DateIntervalType TimeInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\TimeIntervalType DateTimeInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\DateTimeIntervalType WeekInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\WeekIntervalType MonthInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\MonthIntervalType YearInterval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\YearIntervalType IPv4Interval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\IPv4IntervalType IPv6Interval: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\IPv6IntervalType IPv4Network: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\IPv4NetworkType IPv6Network: GpsLab\Component\Interval\Persistence\Doctrine\DBAL\Types\IPv6NetworkType
License
This bundle is under the MIT license. See the complete license in the file: LICENSE