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<?php

namespace Livewire;

use Livewire\HydrationMiddleware\AddAttributesToRootTagOfHtml;

class Response
{
    public $request;

public $fingerprint;
    public $effects;
    public $memo;

public static function fromRequest($request)
    {
        return new static($request);
    }

public function __construct($request)
    {
        $this->request = $request;

$this->fingerprint = $request->fingerprint;
        $this->memo = $request->memo;
        $this->effects = [];
    }

public function id() { return $this->fingerprint['id']; }

public function embedThyselfInHtml()
    {
        if (! $html = $this->effects['html'] ?? null) return;

$this->effects['html'] = (new AddAttributesToRootTagOfHtml)($html, [
            'initial-data' => $this->toArrayWithoutHtml(),
        ]);
    }

public function embedIdInHtml()
    {
        if (! $html = $this->effects['html'] ?? null) return;

$this->effects['html'] = (new AddAttributesToRootTagOfHtml)($html, [
            'id' => $this->fingerprint['id'],
        ]);
    }

public function html()
    {
        return $this->effects['html'] ?? null;
    }

public function toArrayWithoutHtml()
    {
        return [
            'fingerprint' => $this->fingerprint,
            'effects' => array_diff_key($this->effects, ['html' => null]),
            'serverMemo' => $this->memo,
        ];
    }

public function toInitialResponse()
    {
        return tap($this)->embedIdInHtml();
    }

public function toSubsequentResponse()
    {
        $this->embedIdInHtml();

$requestMemo = $this->request->memo;
        $responseMemo = $this->memo;
        $dirtyMemo = [];

// Only send along the memos that have changed to not bloat the payload.
        foreach ($responseMemo as $key => $newValue) {
            // If the memo key is not in the request, add it.
            if (! isset($requestMemo[$key])) {
                $dirtyMemo[$key] = $newValue;

continue;
            }

// If the memo values are the same, skip adding them.
            if ($requestMemo[$key] === $newValue) continue;

$dirtyMemo[$key] = $newValue;
        }

// If 'data' is present in the response memo, diff it one level deep.
        if (isset($dirtyMemo['data']) && isset($requestMemo['data'])) {
            foreach ($dirtyMemo['data'] as $key => $value) {
                if (! isset($requestMemo['data'][$key])) continue;

if ($value === $requestMemo['data'][$key]) {
                    unset($dirtyMemo['data'][$key]);
                }
            }
        }

// Make sure any data marked as "dirty" is present in the resulting data payload.
        foreach (data_get($this, 'effects.dirty', []) as $property) {
            $property = head(explode('.', $property));

data_set($dirtyMemo, 'data.'.$property, $responseMemo['data'][$property] ?? null);
        }

return [
            'effects' => $this->effects,
            'serverMemo' => $dirtyMemo,
        ];
    }
}