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GitHub - spatie/period: Complex period comparisons

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source link: https://github.com/spatie/period
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README.md

Complex period comparisons

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This package adds support for comparing multiple dates with each other. You can calculate the overlaps and differences between n-amount of periods, as well as some more basic comparisons between two periods.

Periods can be constructed from any type of DateTime implementation, making this package compatible with custom DateTime implementations like Carbon.

Periods are always immutable, there's never the worry about your input dates being changed.

This package is still a work in progress.

Installation

You can install the package via composer:

composer require spatie/period

Usage

Overlaps with any other period: this method returns a PeriodCollection multiple Period objects representing the overlaps.

/*
 * A       [========]
 * B                    [==]
 * C                            [=====]
 * CURRENT        [===============]
 *
 * OVERLAP        [=]   [==]    [=]
 */

$a = Period::make('2018-01-01', '2018-01-31');
$b = Period::make('2018-02-10', '2018-02-20');
$c = Period::make('2018-03-01', '2018-03-31');

$current = Period::make('2018-01-20', '2018-03-10');

$overlaps = $current->overlap($a, $b, $c);

Overlap with all periods: this method only returns one period where all periods overlap.

/*
 * A              [============]
 * B                   [==]
 * C                  [=======]
 *
 * OVERLAP             [==]
 */

$a = Period::make('2018-01-01', '2018-01-31');
$b = Period::make('2018-01-10', '2018-01-15');
$c = Period::make('2018-01-10', '2018-01-31');

$overlap = $a->overlapAll($b, $c);

Diff between multiple periods: this method returns a PeriodCollection multiple Period objects representing the diffs between several periods and one.

/*
 * A                   [====]
 * B                               [========]
 * C         [=====]
 * CURRENT      [========================]
 *
 * DIFF             [=]      [====]
 */

$a = Period::make('2018-01-05', '2018-01-10');
$b = Period::make('2018-01-15', '2018-03-01');
$c = Period::make('2017-01-01', '2018-01-02');

$current = Period::make('2018-01-01', '2018-01-31');

$diff = $current->diff($a, $b, $c);

Overlaps with: this method returns a boolean indicating of two periods overlap or not.

/*
 * A              [============]
 * B                   [===========]
 */

$a = Period::make('2018-01-01', '2018-01-31');
$b = Period::make('2018-01-10', '2018-02-15');

$overlap = $a->overlapsWith($b); // true

Touches with: this method determines if two periods touch each other.

/*
 * A              [========]
 * B                        [===========]
 */

$a = Period::make('2018-01-01', '2018-01-31');
$b = Period::make('2018-02-01', '2018-02-15');

$overlap = $a->touchesWith($b); // true

Gap: returns the gap between two periods. If no gap exists, null is returned.

/*
 * A              [========]
 * B                           [===========]
 */

$a = Period::make('2018-01-01', '2018-01-31');
$b = Period::make('2018-02-05', '2018-02-15');

$overlap = $a->gap($b); // Period('2018-02-01', '2018-02-04')

Boundaries of a collection: get one period representing the boundaries of a collection.

/*
 * A                   [====]
 * B                               [========]
 * C           [=====]
 * D                                             [====]
 *
 * BOUNDARIES  [=======================================]
 */

$collection = new PeriodCollection(
    Period::make('2018-01-01', '2018-01-05'),
    Period::make('2018-01-10', '2018-01-15'),
    Period::make('2018-01-20', '2018-01-25'),
    Period::make('2018-01-30', '2018-01-31')
);

$boundaries = $collection->boundaries();

Gaps of a collection: get all the gaps of a collection.

/*
 * A                   [====]
 * B                               [========]
 * C         [=====]
 * D                                             [====]
 *
 * GAPS             [=]      [====]          [==]
 */

$collection = new PeriodCollection(
    Period::make('2018-01-01', '2018-01-05'),
    Period::make('2018-01-10', '2018-01-15'),
    Period::make('2018-01-20', '2018-01-25'),
    Period::make('2018-01-30', '2018-01-31')
);

$gaps = $collection->gaps();

Overlap multiple collections: returns the overlap between collections. This means an AND operation between collections, and an OR operation within the same collection.

/*
 * A            [=====]      [===========]
 * B            [=================]
 * C                [====================]
 *
 * OVERLAP          [=]      [====]
 */

$a = new PeriodCollection(
    Period::make('2018-01-01', '2018-01-07'),
    Period::make('2018-01-15', '2018-01-25')
);

$b = new PeriodCollection(
    Period::make('2018-01-01', '2018-01-20')
);

$c = new PeriodCollection(
    Period::make('2018-01-06', '2018-01-25')
);

$overlap = $a->overlap($b, $c);

Working with PeriodCollection

Period collections are constructed from several periods:

$collection = new PeriodCollection(
    Period::make('2018-01-01', '2018-01-02'),
    // …
);

They may be looped over directly and its contents will be recognised by your IDE:

$collection = new PeriodCollection(/* … */);

foreach ($collection as $period) {
    $period->…
}

You may destruct them:

[$firstPeriod, $secondPeriod, $thirdPeriod] = $collection;

And finally construct one collection from another:

$newCollection = new PeriodCollection(...$otherCollection);

Compatibility

You can construct a Period from any type of DateTime object such as Carbon:

Period::make(Carbon::make('2018-01-01'), Carbon::make('2018-01-02'));

Note that as soon as a period is constructed, all further operations on it are immutable. There's never the danger of changing the input dates.

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Postcardware

You're free to use this package, but if it makes it to your production environment we highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using.

Our address is: Spatie, Samberstraat 69D, 2060 Antwerp, Belgium.

We publish all received postcards on our company website.

Credits

Support us

Spatie is a webdesign agency based in Antwerp, Belgium. You'll find an overview of all our open source projects on our website.

Does your business depend on our contributions? Reach out and support us on Patreon. All pledges will be dedicated to allocating workforce on maintenance and new awesome stuff.

License

The MIT License (MIT). Please see License File for more information.


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