Between时隙可用

Question

问题是，我似乎真的无法找出一种方法来确保它不会输出'可用'到已经在$events变量中使用的时间段。

对于输出示例，您可以看到在2015-11-18 10:00:00到2015-11-18 10:30:00，它声称插槽可用，但这应该是不可用的，因为在该时间段有一个事件。

以下代码的输出示例:

2015-11-18 09:00:00至2015-11-18 09:30:00可用

2015-11-18 09:30:00至2015-11-18 10:00:00可用

2015-11-18 10:00:00至2015-11-18 10:30:00可用

2015-11-18 10:30:00 ~ 2015-11-18 11:00:00

2015-11-18 11:00:00 ~ 2015-11-18 11:30:00

2015-11-18 11:30:00 ~ 2015-11-18 12:00:00

2015-11-18 12:00:00 ~ 2015-11-18 12:30:00

2015-11-18 12:30:00至2015-11-18 13:00:00可用

2015-11-18 13:00:00至2015-11-18 13:30:00可用

2015-11-18 13:30:00至2015-11-18 14:00:00可用

2015-11-18 14:00:00至2015-11-18 14:30:00可用

2015-11-18 14:30:00至2015-11-18 15:00:00

2015-11-18 15:00:00 ~ 2015-11-18 15:30:00

2015-11-18 15:30:00至2015-11-18 16:00:00可用

2015-11-18 16:00:00至2015-11-18 16:30:00可用

我使用http://carbon.nesbot.com/作为顶部所需的碳。

<?php
    require 'Carbon.php';
    use CarbonCarbon;
    $schedule = [
        'start' => '2015-11-18 06:00:00',
        'end' => '2015-11-18 18:00:00',
    ];
    $start = Carbon::instance(new DateTime($schedule['start']));
    $end = Carbon::instance(new DateTime($schedule['end']));
    $minInterval = new DateInterval('PT30M');
    $reqInterval = new DateInterval('PT45M');
    $events = [
        [
            'created_at' => '2015-11-18 10:00:00',
            'updated_at' => '2015-11-18 13:00:00',
        ],
        [
            'created_at' => '2015-11-18 14:00:00',
            'updated_at' => '2015-11-18 16:00:00',
        ],
    ];
    function slotAvailable($from, $to, $events){
        foreach($events as $event){
            $eventStart = new DateTime($event['created_at']);
            $eventEnd = new DateTime($event['updated_at']);
            if(($from > $eventStart && $to < $eventEnd) || ($from < $eventEnd && $to > $eventEnd) || ($from < $eventStart && $to > $eventStart)){
                return false;
            }
        }
        return true;
    }
    foreach(new DatePeriod($start, $minInterval, $end) as $slot){
        $to = $slot->copy()->add($reqInterval);
        echo $slot->toDateTimeString() . ' to ' . $to->toDateTimeString();
        if(slotAvailable($slot, $to, $events)){
            echo ' is available';
        }
        echo '<br />';
        }
    }
?>

Answer 1

您的if条件在slotAvailable中是错误的:您必须包括>=或<=间隔的开始和结束。此外，我认为它可以简化为:

if ($eventStart <= $from && $eventEnd >= $to) {
    return false;
}

Answer 2

似乎如果我在if语句的第一部分添加=它修复了大部分，我只是在if语句中添加了一个额外的检查，如果$to超过$schedule['end']，所以它也修复了这个问题。

最终代码如下:

<?php
require 'Carbon.php';
use CarbonCarbon;
$schedule = [
    'start' => '2015-11-18 06:00:00',
    'end' => '2015-11-18 18:00:00',
];
$start = Carbon::instance(new DateTime($schedule['start']));
$end = Carbon::instance(new DateTime($schedule['end']));
$minInterval = new DateInterval('PT30M');
$reqInterval = new DateInterval('PT45M');
$events = [
    [
        'created_at' => '2015-11-18 10:00:00',
        'updated_at' => '2015-11-18 13:00:00',
    ],
    [
        'created_at' => '2015-11-18 14:00:00',
        'updated_at' => '2015-11-18 16:00:00',
    ],
];
function slotAvailable($from, $to, $events, $workEnd){
    foreach($events as $event){
        $eventStart = new DateTime($event['created_at']);
        $eventEnd = new DateTime($event['updated_at']);
        if(($from >= $eventStart && $to <= $eventEnd) || ($from < $eventEnd && $to > $eventEnd) || ($from < $eventStart && $to > $eventStart) || ($to > $workEnd)){
            return false;
        }
    }
    return true;
}
foreach(new DatePeriod($start, $minInterval, $end) as $slot){
    $to = $slot->copy()->add($reqInterval);
    $workEnd = $schedule['end'];
    echo $slot->toDateTimeString() . ' to ' . $to->toDateTimeString();
    if(slotAvailable($slot, $to, $events, $workEnd)){
        echo ' is available';
    }
    echo '<br />';
    }
}
?>