pixelfed/app/DiscoverCategory.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use App\{Status, StatusHashtag};

class DiscoverCategory extends Model
{
    protected $fillable = ['slug'];

    public function media()
    {
    	return $this->belongsTo(Media::class);
    }

    public function url()
    {
    	return url('/discover/c/'.$this->slug);
    }

    public function editUrl()
    {
    	return url('/i/admin/discover/category/edit/' . $this->id);
    }

    public function thumb()
    {
    	return $this->media->thumb();
    }

    public function items()
    {
    	return $this->hasMany(DiscoverCategoryHashtag::class, 'discover_category_id');
    }

    public function hashtags()
    {
    	return $this->hasManyThrough(
    		Hashtag::class,
    		DiscoverCategoryHashtag::class,
    		'discover_category_id',
    		'id',
    		'id',
    		'hashtag_id'
    	);
    }

    public function posts()
    {
    	return Status::select('*')
    		->join('status_hashtags', 'statuses.id', '=', 'status_hashtags.status_id')
    		->join('hashtags', 'status_hashtags.hashtag_id', '=', 'hashtags.id')
    		->join('discover_category_hashtags', 'hashtags.id', '=', 'discover_category_hashtags.hashtag_id')
    		->join('discover_categories', 'discover_category_hashtags.discover_category_id', '=', 'discover_categories.id')
    		->where('discover_categories.id', $this->id);
    }
}