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<?php

namespace Livewire\Mechanisms;

use WeakMap;

class DataStore
{
    function register()
    {
        app()->singleton($this::class);
    }

    function boot()
    {
        //
    }

    protected $lookup;

    function __construct()
    {
        $this->lookup = new WeakMap;
    }

    function set($instance, $key, $value)
    {
        if (! isset($this->lookup[$instance])) {
            $this->lookup[$instance] = [];
        }

        $this->lookup[$instance][$key] = $value;
    }

    function has($instance, $key, $iKey = null) {
        if (! isset($this->lookup[$instance])) {
            return false;
        }

        if (! isset($this->lookup[$instance][$key])) {
            return false;
        }

        if ($iKey !== null) {
            return !! $this->lookup[$instance][$key][$iKey] ?? false;
        }

        return true;
    }

    function get($instance, $key, $default = null)
    {
        if (! isset($this->lookup[$instance])) {
            return value($default);
        }

        if (! isset($this->lookup[$instance][$key])) {
            return value($default);
        }

        return $this->lookup[$instance][$key];
    }

    function find($instance, $key, $iKey = null, $default = null)
    {
        if (! isset($this->lookup[$instance])) {
            return value($default);
        }

        if (! isset($this->lookup[$instance][$key])) {
            return value($default);
        }

        if ($iKey !== null && ! isset($this->lookup[$instance][$key][$iKey])) {
            return value($default);
        }

        return $iKey !== null
            ? $this->lookup[$instance][$key][$iKey]
            : $this->lookup[$instance][$key];
    }

    function push($instance, $key, $value, $iKey = null)
    {
        if (! isset($this->lookup[$instance])) {
            $this->lookup[$instance] = [];
        }

        if (! isset($this->lookup[$instance][$key])) {
            $this->lookup[$instance][$key] = [];
        }

        if ($iKey) {
            $this->lookup[$instance][$key][$iKey] = $value;
        } else {
            $this->lookup[$instance][$key][] = $value;
        }
    }
}