Php - How to group attendances data by time and type?

ador
August 26, 2023
185 views
0 votes
2 Answers

I’m struggling with code that would group attendance data.
Usually, in cases where arrival and departure are on the same day, it’s not a problem to group the attendance.
The problem becomes if I have a "night shift": arriving at 10pm and leaving at 06am the next day. In that case, I would like to have a new group of attendances. And than If there are any attendance entries for the next day as well (later than the first check-out for that day), I want to combine them into a new group.

$attendances = [

//Group 1

{
    "id": 1,
    "attendance_date": "2023-08-24",
    "time": "11:00:00",
    "status": "arrival"
},
{
    "id": 2,
    "attendance_date": "2023-08-24",
    "time": "14:00:00",
    "status": "departure"
},

//Group 2

{
    "id": 3,
    "attendance_date": "2023-08-24",
    "time": "22:00:00",
    "status": "arrival"
},
{
    "id": 4,
    "attendance_date": "2023-08-25",
    "time": "06:00:00",
    "status": "departure"
},

// Group 3

{
    "id": 5,
    "attendance_date": "2023-08-25",
    "time": "10:00:00",
    "status": "arrival"
},
{
    "id": 6,
    "attendance_date": "2023-08-25",
    "time": "18:00:00",
    "status": "departure"
}

]

My current code for grouping array is this and it only works in some cases.

        $currentDate = null;
        $groupedAttendances = [];
        $currentGroup = [];

        foreach ($attendances as $attendance) {
            if ($attendance->attendance_date !== $currentDate) {
                // New attendance_date encountered, create a new group
                $currentDate = $attendance->attendance_date;
                if (!empty($currentGroup)) {
                    $groupedAttendances[] = $currentGroup;
                }
                $currentGroup = [$attendance];
            } else {
                // Adding to the current group
                $currentGroup[] = $attendance;
            }
        }

        if (!empty($currentGroup)) {
            $groupedAttendances[] = $currentGroup;
        }

Tags: arrays php

Answers

Chosen as BEST ANSWER

Maybe I was unclear. But I managed to get the wanted result.

Example data from database:

$data = [
            (object) [
                "id" => 1,
                "attendance_date" => "2023-08-24",
                "time" => "11:00:00",
                "status" => "arrival",
            ],
            (object) [
                "id" => 2,
                "attendance_date" => "2023-08-24",
                "time" => "14:00:00",
                "status" => "departure",
            ],
            (object) [
                "id" => 3,
                "attendance_date" => "2023-08-24",
                "time" => "22:00:00",
                "status" => "arrival",
            ],
            (object) [
                "id" => 4,
                "attendance_date" => "2023-08-25",
                "time" => "06:00:00",
                "status" => "departure",
            ],
            (object) [
                "id" => 5,
                "attendance_date" => "2023-08-25",
                "time" => "10:00:00",
                "status" => "arrival",
            ],
            (object) [
                "id" => 6,
                "attendance_date" => "2023-08-25",
                "time" => "18:00:00",
                "status" => "departure",
            ],
        ];

The code for groupping attendances:

$attendances = collect($data);
        $groupedAttendances = [];
        $currentGroup = [];

        foreach ($attendances as $attendance) {
            if ($attendance->status === 'arrival') {
                if (!empty($currentGroup)) {
                    if (count($currentGroup) === 1 && $currentGroup[0]->status === 'arrival') {
                        // Handle night shift with no departure on the same day
                        $currentGroup[0]->night_shift = true;
                    }
                    $groupedAttendances[] = $currentGroup;
                    $currentGroup = [];
                }
            }

            $currentGroup[] = $attendance;
        }

        if (!empty($currentGroup)) {
            if (count($currentGroup) === 1 && $currentGroup[0]->status === 'arrival') {
                // Handle night shift with no departure on the same day
                $currentGroup[0]->night_shift = true;
            }
            $groupedAttendances[] = $currentGroup;
        }

        print_r($groupedAttendances);

Output results:

array:3 [▼ 
  0 => array:2 [▼
    0 => {#1580 ▼
      +"id": 1
      +"attendance_date": "2023-08-24"
      +"time": "11:00:00"
      +"status": "arrival"
    }
    1 => {#1581 ▼
      +"id": 2
      +"attendance_date": "2023-08-24"
      +"time": "14:00:00"
      +"status": "departure"
    }
  ]
  1 => array:2 [▼
    0 => {#1552 ▼
      +"id": 3
      +"attendance_date": "2023-08-24"
      +"time": "22:00:00"
      +"status": "arrival"
    }
    1 => {#1579 ▼
      +"id": 4
      +"attendance_date": "2023-08-25"
      +"time": "06:00:00"
      +"status": "departure"
    }
  ]
  2 => array:2 [▼
    0 => {#1578 ▼
      +"id": 5
      +"attendance_date": "2023-08-25"
      +"time": "10:00:00"
      +"status": "arrival"
    }
    1 => {#1577 ▼
      +"id": 6
      +"attendance_date": "2023-08-25"
      +"time": "18:00:00"
      +"status": "departure"
    }
  ]
]

(Edit)

It is not explained in the question which two entries form attendance pairs. Only the comments ‘Group 1’ etc. give a hint. So my assumption is that they are to be grouped in pairs as they are appearing in the array (hence the use of array_chunk):

$attendances = [
  [
    'id'              => 1,
    'attendance_date' => '2023-08-24',
    'time'            => '11:00:00',
    'status'          => 'arrival'
  ],
  [
    'id'              => 2,
    'attendance_date' => '2023-08-24',
    'time'            => '14:00:00',
    'status'          => 'departure'
  ],
  [
    'id'              => 3,
    'attendance_date' => '2023-08-24',
    'time'            => '22:00:00',
    'status'          => 'arrival'
  ],
  [
    'id'              => 4,
    'attendance_date' => '2023-08-25',
    'time'            => '06:00:00',
    'status'          => 'departure'
  ],
  [
    'id'              => 5,
    'attendance_date' => '2023-08-25',
    'time'            => '10:00:00',
    'status'          => 'arrival'
  ],
  [
    'id'              => 6,
    'attendance_date' => '2023-08-25',
    'time'            => '18:00:00',
    'status'          => 'departure'
  ]
];

$result = [];

foreach (array_chunk($attendances, 2) as $item) {
  if ($item[0]['attendance_date'] === $item[1]['attendance_date']) {
    $result[$item[0]['attendance_date']][] = $item;
  } else {
    $result[$item[0]['attendance_date']][] = [
      $item[0],
      [
        'id'              => $item[0]['id'],
        'attendance_date' => $item[0]['attendance_date'],
        'time'            => '23:59:59',
        'status'          => 'end of day'
      ],
    ];
    $result[$item[1]['attendance_date']][] = [
      [
        'id'              => $item[1]['id'],
        'attendance_date' => $item[1]['attendance_date'],
        'time'            => '00:00:00',
        'status'          => 'start of day'
      ],
      $item[1]
    ];
  }
}

print_r($result);

Output:

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Php – How to group attendances data by time and type?

Answers