Как трансформировать массив?

Question

[Ilya Loopz]

Всем привет! Подскажите, как реализовать логику для изменения массива `messages` в `messages2`.
Нужно сгруппировать элементы по значению `customer_id`, сохранив их порядок. В данном примере сначала нужно сгруппировать элементы с `id = 1` и `2`, затем `3` и `4`, и так далее.

"messages": [
	{
		"id": 1,
		"customer": "Dr. Kane Hill",
		"customer_id": 1,
		"created_at": "2024-11-19 11:18:57",
		"text": "Hello, how are you?"
	},
	{
		"id": 2,
		"customer": "Dr. Kane Hill",
		"customer_id": 1,
		"created_at": "2024-11-19 11:20:57",
		"text": "I am good, thanks! How about you?"
	},
	{
		"id": 3,
		"customer": "Prof. Samir McClure III",
		"customer_id": 2,
		"created_at": "2024-11-19 11:21:57",
		"text": "Hey, what time is it?"
	},
	{
		"id": 4,
		"customer": "Prof. Samir McClure III",
		"customer_id": 2,
		"created_at": "2024-11-19 11:22:57",
		"text": "It is 3 PM."
	},
	{
		"id": 5,
		"customer": "Shad Leffler",
		"customer_id": 3,
		"created_at": "2024-11-19 11:23:57",
		"text": "Did you finish the project?"
	},
	{
		"id": 6,
		"customer": "Shad Leffler",
		"customer_id": 3,
		"created_at": "2024-11-19 11:24:57",
		"text": "New mesh"
	},
	{
		"id": 7,
		"customer": "Prof. Samir McClure III",
		"customer_id": 2,
		"created_at": "2024-11-19 11:26:57",
		"text": "Not bed?"
	},
	{
		"id": 8,
		"customer": "Prof. Samir McClure III",
		"customer_id": 2,
		"created_at": "2024-11-19 11:27:57",
		"text": "Cool?"
	}
]

"messages2": [
	{
		"customer": "Dr. Kane Hill",
		"messages_id": 1,
		"customer_id": 1,
		"messages": [
			{
				"id": 1,
				"created_at": "2024-11-19 11:18:57",
				"text": "Hello, how are you?",
			},
			{
				"id": 2,
				"created_at": "2024-11-19 11:20:57",
				"text": "I am good, thanks! How about you?",
			}
		]
	},
	{
		"customer": "Prof. Samir McClure III",
		"messages_id": 2,
		"customer_id": 2,
		"messages": [
			{
				"id": 3,
				"created_at": "2024-11-19 11:21:57",
				"text": "Hey, what time is it?",
			},
			{
				"id": 4,
				"created_at": "2024-11-19 11:22:57",
				"text": "It is 3 PM."
			}
		]
	},
	{
		"customer": "Shad Leffler",
		"messages_id": 3,
		"customer_id": 3,
		"messages": [
			{
				"id": 4,
				"created_at": "2024-11-19 11:23:57",
				"text": "Did you finish the project?"
			},
			{
				"id": 5,
				"created_at": "2024-11-19 11:24:57",
				"text": "New mesh"
			}
		]
	},
	{
		"customer": "Prof. Samir McClure III",
		"messages_id": 4,
		"customer_id": 2,
		"messages": [
			{
				"id": 6,
				"created_at": "2024-11-19 11:26:57",
				"text": "Not bed?"
			},
			{
				"id": 7,
				"created_at": "2024-11-19 11:27:57",
				"text": "Cool?"
			},

		]
	},
]

У меня получается какой-то монстр.

public function toArray(Request $request): array
    {
        $messages = $this->whenLoaded('messages')->sortBy('id');

        $messagesGroupedByCustomer = [];
        $messagesIdCounter = 1;
        $currentCustomerId = null;
        $currentCustomerMessages = [];

        foreach ($messages as $message) {
            if ($currentCustomerId !== $message['customer_id']) {
                if ($currentCustomerId !== null) {
                    $messagesGroupedByCustomer[] = [
                        'customer' => $currentCustomerMessages[0]['customer']->full_name,
                        'messages' => array_map(function ($msg) {
                            return [
                                'id' => $msg['id'],
                                'created_at' => $msg['created_at']->toDateTimeString(),
                                'text' => $msg['text'],
                            ];
                        }, $currentCustomerMessages),
                    ];
                    $messagesIdCounter++;
                }

                $currentCustomerId = $message['customer_id'];
                $currentCustomerMessages = [];
            }

            $currentCustomerMessages[] = $message;
        }

        if ($currentCustomerId !== null) {
            $messagesGroupedByCustomer[] = [
                'customer' => $currentCustomerMessages[0]['customer']->full_name,
                'messages' => array_map(function ($msg) {
                    return [
                        'id' => $msg['id'],
                        'created_at' => $msg['created_at']->toDateTimeString(),
                        'text' => $msg['text'],
                    ];
                }, $currentCustomerMessages),
            ];
        }
        $data['date'] = "Сегодня";
        $data['item'] = $messagesGroupedByCustomer;

        return $data;
    }

Comments

[Adamos]

Не нужны никакие промежуточные сборки, все делается одним циклом, просто используй индексы

if(!array_key_exists($customerId, $messages2)) {
  $messages2[$customerId] = ... //вся инфа + пустой массив ['messages']
}
$mesages2[$customerId]['messages][] = ... // собственно message
...
return array_values($messages2);