iao_team/app/Http/Livewire/Causals.php

<?php
namespace App\Http\Livewire;
use Livewire\Component;
class Causals extends Component
{
    public $level_1 = [];
    public $level_2 = [];
    public $level_3 = [];

    public $level_1_id = 0;
    public $level_2_id = 0;
    public $level_3_id = 0;

    public $type = '';
    public $idx = -1;
    public $causal_id = null;

    public function mount($type, $idx, $causal_id)
    {
        $this->type = $type;
        $this->idx = $idx;
        $this->causal_id = $causal_id;
        if ($this->causal_id != null)
        {
            $c = \App\Models\Causal::findOrFail($this->causal_id);
            $ids = array_reverse($c->recursiveParent($c->parent_id, [$c->id]));
            foreach($ids as $ii => $i)
            {
                if ($ii == 0)
                {
                    $this->level_1_id = $i;
                }
                if ($ii == 1)
                {
                    $this->level_2_id = $i;
                }
                if ($ii == 2)
                {
                    $this->level_3_id = $i;
                }
            }

        }
    }

    public function updatedLevel1Id() {
        $this->emit('setCausal', null, $this->idx);
        $this->level_2_id = 0;
        $this->level_2 = [];
        $this->level_3_id = 0;
        $this->level_3 = [];
    }
    public function updatedLevel2Id() {
        $this->emit('setCausal', null, $this->idx);
        $this->level_3_id = 0;
        $this->level_3 = [];
    }
    public function updatedLevel3Id() {
        $this->emit('setCausal', null, $this->idx);
    }

    public function render()
    {
        $reset = false;
        if ($this->level_1_id > 0)
        {
            $this->level_2 = \App\Models\Causal::where('parent_id', $this->level_1_id)->where('type', $this->type)->orderBy('name')->get();
            if (sizeof($this->level_2) == 0)
            {
                $this->emit('setCausal', $this->level_1_id, $this->idx);
                $reset = true;
            }
        }
        if ($this->level_2_id > 0)
        {
            $this->level_3 = \App\Models\Causal::where('parent_id', $this->level_2_id)->where('type', $this->type)->orderBy('name')->get();
            if (sizeof($this->level_3) == 0)
            {
                $this->emit('setCausal', $this->level_2_id, $this->idx);
                $reset = true;
            }
        }
        if ($this->level_3_id > 0)
        {
            $this->emit('setCausal', $this->level_3_id, $this->idx);
            $reset = true;
        }
        $this->level_1 = \App\Models\Causal::where('parent_id', null)->where('type', $this->type)->orderBy('name')->get();

        return view('livewire.causals');
    }
}