timebank-cc-public/app/Http/Livewire/Locations/LocationsDropdown.php

<?php

namespace App\Http\Livewire\Locations;

use App\Models\Locations\City;
use App\Models\Locations\Country;
use App\Models\Locations\District;
use App\Models\Locations\Division;
use Illuminate\Support\Facades\Cache;
use Livewire\Component;

class LocationsDropdown extends Component
{
    public $country;
    public $division;
    public $city;
    public $district;
    public $hideLabel = false;
    public bool $showCountry = true;
    public bool $showDivision = true;
    public bool $showCity = true;
    public bool $showDistrict = true;

    protected $listeners = ['countryToChildren', 'divisionToChildren', 'cityToChildren', 'districtToChildren'];


    /**
     * Receive country value from parent component.
     * Does NOT reset downstream values - that would clear values being set by subsequent ToChildren calls.
     */
    public function countryToChildren($value)
    {
        $this->country = $value;
        // Don't call updatedCountry() as it resets division/city/district
        // Parent is responsible for setting all values correctly
    }


    /**
     * Receive division value from parent component.
     * Does NOT reset downstream values - that would clear values being set by subsequent ToChildren calls.
     */
    public function divisionToChildren($value)
    {
        $this->division = $value ?: null;
        // Don't call updatedDivision() as it resets city/district
    }


    /**
     * Receive city value from parent component.
     * Does NOT reset downstream values - that would clear values being set by subsequent ToChildren calls.
     */
    public function cityToChildren($value)
    {
        $this->city = $value ?: null;
        // Don't call updatedCity() as it resets district
    }


    /**
     * Receive district value from parent component.
     */
    public function districtToChildren($value)
    {
        $this->district = $value ?: null;
        // No downstream values to reset
    }


    public function updatedCountry()
    {
        $this->reset(['division', 'city', 'district']);

        $this->dispatch('countryToParent', $this->country);
        $this->dispatch('divisionToParent', null);
        $this->dispatch('cityToParent', null);
        $this->dispatch('districtToParent', null);
    }


    public function updatedDivision()
    {
        $this->reset(['city', 'district']);
        if ($this->division === '') {
            $this->division = null;
        }
        $this->dispatch('divisionToParent', $this->division);
        $this->dispatch('cityToParent', null);
        $this->dispatch('districtToParent', null);
    }


    public function updatedCity()
    {
        $this->reset(['district']);
        if ($this->city === '') {
            $this->city = null;
        }
        $this->dispatch('cityToParent', $this->city);
        $this->dispatch('districtToParent', null);
    }


    public function updatedDistrict()
    {
        if ($this->district === '') {
            $this->district = null;
        }
        $this->dispatch('districtToParent', $this->district);
    }


    public function countrySelected()
    {
        $this->dispatch('countryToParent', $this->country);
    }


    public function divisionSelected()
    {
        $this->dispatch('divisionToParent', $this->division);
    }


    public function citySelected()
    {
        $this->dispatch('cityToParent', $this->city);
    }


    public function districtSelected()
    {
        $this->dispatch('districtToParent', $this->district);
    }


    public function render()
    {
        $countries = Cache::remember(
            'location_countries_all', 86400,
            fn() => Country::with(['translations'])->get()
        );

        $divisions = collect();
        $cities = collect();
        $districts = collect();

        if (!empty($this->country)) {
            $divisions = Cache::remember(
                'location_divisions_' . $this->country, 3600,
                fn() => Division::with(['translations'])->where('country_id', $this->country)->get()
            );
            if (!empty($this->division)) {
                $cities = Cache::remember(
                    'location_cities_division_' . $this->division, 3600,
                    fn() => City::with(['translations'])->where('division_id', $this->division)->get()
                );
            } else {
                $cities = Cache::remember(
                    'location_cities_country_' . $this->country, 3600,
                    fn() => City::with(['translations'])->where('country_id', $this->country)->get()
                );
            }
        }

        if (!empty($this->city)) {
            $districts = Cache::remember(
                'location_districts_city_' . $this->city, 3600,
                fn() => District::with(['translations'])->where('city_id', $this->city)->get()
            );
        }

        return view('livewire.locations.locations-dropdown', compact('countries', 'divisions', 'cities', 'districts'));
    }
}