test.php

composer.json

{
    "require": {
        "simshaun/recurr": "^2.1"
    }
}

gistfile1.txt

<?php

require_once "./vendor/autoload.php";

use Recurr\Rule;
use Recurr\Transformer\ArrayTransformer;
use Recurr\Transformer\Constraint\BetweenConstraint;

class WeekDayAvailability
{
    private $weekDay;
    private $availabilityList = [];

    public function __construct($weekday, $availabilityList)
    {
        $this->weekDay = $weekday;
        $this->availabilityList = $availabilityList;
    }
}

$availabilities = [
    [
        "maxCovers" => null,
        "timeSlotRangeList" => [
            [720, 780],
            [1020, 150]
        ],
        "recurrence" => "FREQ=WEEKLY;BYDAY=MO"
    ],
    [
        "maxCovers" => 20,
        "timeSlotRangeList" => [
            [820, 880]
        ],
        "recurrence" => "FREQ=WEEKLY;BYDAY=MO,TU"
    ],
    [
        "maxCovers" => 30,
        "timeSlotRangeList" => [
            [760, 820]
        ],
        "recurrence" => "FREQ=WEEKLY;BYDAY=MO,TU,WE"
    ]
];


function transformRecurrences($availabilityList)
{
    // 1 - Explode availability recurrences by weekday
    $explodedAvailabilityList = [];
    $transformer = new ArrayTransformer();
    $constraint = new BetweenConstraint(
        new \DateTime(),
        new \DateTime("+6 days"),
        true
    );

    foreach ($availabilityList as $availability) {
        $rule = new Rule($availability['recurrence'], null, null, 'UTC');
        $explodedDates = $transformer->transform($rule, $constraint);

        $maxCovers = isset($availability['maxCovers']) ? $availability['maxCovers'] : -1;
        foreach ($explodedDates as $date) {
            $weekDay = $date->getStart()->format('w');

            $explodedAvailabilityList[$weekDay][$maxCovers] = $availability['timeSlotRangeList'];
        }
    }

    // 2 - build and set 7 weekday availabilities
    $list = [];
    for ($weekDayNum = 0; $weekDayNum < 7; $weekDayNum++) {
        $weekDayTimeSlotList = [];
        
        // Fill weekdayAvailabilities with provided $timeSlotListData if it exists
        if (array_key_exists($weekDayNum, $explodedAvailabilityList)) {
            foreach ($explodedAvailabilityList[$weekDayNum] as $maxCovers => $timeSlotListData) {
                $explodedAvailabilityList[] = [
                    'maxCovers' => -1 === $maxCovers ? null : $maxCovers,
                    'slots' => $timeSlotListData,
                ];
            }
        }

        $list[$weekDayNum] = new WeekDayAvailability($weekDayNum, $weekDayTimeSlotList);
    }

    return $list;
}
$time_start = microtime(true);
$list = transformRecurrences($availabilities);
$time_end = microtime(true);

$time = $time_end - $time_start;

echo 'Durée : '.$time.' secondes<br/>';

//var_dump($list);die;