合并来自单个数据集的关联数据

Question

我接手了一个已经包含大量数据的项目。 给定的格式不是最好的，并且只包含单个数据集。它们中的大多数属于同一个“事件”。我想合并这些数据集。

给定的数据集采用以下格式：

给定数据集：

[0] => Array
    (
        [id] => 4
        [title] => Party 1
        [start] => 2017-06-14
        [end] => 2017-06-14
        [className] => Array
            (
                [0] => yyy
                [1] => zzz
            )

        [color] => #26B99A
        [zeit] => xxx
    )

[1] => Array
    (
        [id] => 6
        [title] => Party 2
        [start] => 2017-04-27
        [end] => 2017-04-27
        [className] => Array
            (
                [0] => xxx
                [1] => yyy
            )

        [color] => #26B99A
        [zeit] => zzz
    )

[2] => Array
    (
        [id] => 7
        [title] => Party 2
        [start] => 2017-04-28
        [end] => 2017-04-28
        [className] => Array
            (
                [0] => xxx
                [1] => yyy
            )

        [color] => #26B99A
        [zeit] => zzz
    )

[3] => Array
    (
        [id] => 9
        [title] => Party 2
        [start] => 2017-04-29
        [end] => 2017-04-29
        [className] => Array
            (
                [0] => xxx
                [1] => yyy
            )

        [color] => #26B99A
        [zeit] => zzz
    )

[4] => Array
    (
        [id] => 11
        [title] => Party 3
        [start] => 2017-07-30
        [end] => 2017-07-30
        [className] => Array
            (
                [0] => xxx
                [1] => yyy
            )

        [color] => #26B99A
        [zeit] => zzz
    )

[5] => Array
    (
        [id] => 13
        [title] => Party 3
        [start] => 2017-07-31
        [end] => 2017-07-31
        [className] => Array
            (
                [0] => xxx
                [1] => yyy
            )

        [color] => #26B99A
        [zeit] => zzz
    )......

在这种情况下，将只有一个“Party 1”，并结合了“Party 2”和“Party 3”

因此结果应如下所示：

预期结果

[0] => Array
(
    [id] => 4
    [title] => Party 1
    [start] => 2017-06-14
    [end] => 2017-06-14
    [className] => Array
        (
            [0] => yyy
            [1] => zzz
        )

    [color] => #26B99A
    [zeit] => xxx
)

[1] => Array
(
    [id] => 6
    [title] => Party 2
    [start] => 2017-04-27
    [end] => 2017-04-29    <---- end date edited
    [className] => Array
        (
            [0] => xxx
            [1] => yyy
        )

    [color] => #26B99A
    [zeit] => zzz
)


[2] => Array
(
    [id] => 11
    [title] => Party 3
    [start] => 2017-07-30
    [end] => 2017-07-31     <---- same
    [className] => Array
        (
            [0] => xxx
            [1] => yyy
        )

    [color] => #26B99A
    [zeit] => zzz
)

因此，我使用了一个 PHP 函数，它通过事件的标题对其进行格式化：

PHP：

function formateEvents($event_array){
$events = array();

foreach($event_array as $event)
{
    if(!isset($events[$event['title']]))
    {
        $events[$event['title']]['id']           = $event['id'];
        $events[$event['title']]['title']        = $event['title'];
        $events[$event['title']]['start']        = $event['start'];
        $events[$event['title']]['end']          = $event['end'];
        $events[$event['title']]['name']         = $event['title'];
        $events[$event['title']]['className']    = $event['className'];
        $events[$event['title']]['color']        = $event['color'];
        $events[$event['title']]['zeit']         = $event['zeit'];
    }else{


        if(strtotime($event['start']) < strtotime($events[$event['title']]['start']))
        {
            $events[$event['title']]['start']    = $event['start'];
        }

        if(strtotime($event['end']) > strtotime($events[$event['title']]['end']))
        {
            $events[$event['title']]['end']    = $event['end'];
        }
    }
}

return array_values($events);
}

这适用于上述这些数据集。 但是：问题是，我也有几年前的事件数据，它们通常具有相同的标题。在这种情况下，事件持续时间超过多年。我想防止这种情况的发生，只有同名的数据以及连接的天数应该合并。

我想到的唯一方法是检查日期是否连续......比如 2018-01-01、2018-01-02、2018-01-03 应该是同一个事件...如果中间缺了一天，它应该算作另一个事件

Answer 1

我的解决方案比我想要的要复杂得多，但它确实有效。 所以，让我解释一下。

首先我按标题映射所有事件。

$eventsIndexedByTitleAndEndDate = array();
foreach ($event_array as $event) {
    $eventTitle = $event['title'];
    $eventEnd = $event['end'];

    $eventsIndexedByTitleAndEndDate[$eventTitle][$eventEnd] = $event;
}    

然后我遍历这些数据以找到我想要使用的日期，然后我将这些日期映射到另一个仍然使用事件标题作为主索引的数组中。

$eventDates = array();
foreach ($eventsIndexedByTitleAndEndDate as $eventTitle => $eventIndexedByTitle) {
    $datesFromIndexedTitle = (array_keys($eventIndexedByTitle));

    $start = $datesFromIndexedTitle[0];
    $end = $datesFromIndexedTitle[0];
    foreach ($datesFromIndexedTitle as $dateFromIndexedTitle) {
        $nextDayFromEnd = date('Y-m-d', strtotime("+1 day", strtotime($end)));
        if ($dateFromIndexedTitle == $nextDayFromEnd) {
            $end = $dateFromIndexedTitle;
        } elseif ($dateFromIndexedTitle > $nextDayFromEnd) {
            $eventDates[$eventTitle][] = [
                'start' => $start,
                'end' => $end,
            ];
            $start = $dateFromIndexedTitle;
            $end = $dateFromIndexedTitle;
        }
    }
    $eventDates[$eventTitle][] = [
        'start' => $start,
        'end' => $end,
    ];
}

在我映射了所有日期之后，我使用引用运行此数组，以使用由 Title 索引的数组中的数据更新键，并按应有的方式更新开始/结束日期。

foreach ($eventDates as $title => &$eventDate) {
    foreach ($eventDate as &$eachEvent) {
        $start = $eachEvent['start'];
        $end = $eachEvent['end'];

        $eachEvent = $eventsIndexedByTitleAndEndDate[$title][$start];
        $eachEvent['start'] = $start;
        $eachEvent['end'] = $end;
    }
}

我相信可能有一种更简单的方法可以做到这一点，但我现在想不出一个解决方案，尽管这是一个很好的练习。 :)