Laravel Pipeline Stracture

BaseFilter.php

<?php


namespace App\QueryFilters;


use Closure;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Str;

abstract class BaseFilter implements QueryFilterContract
{
    /**
     * @var string $request_key_name filter name
     */
    protected $request_key_name;

    /**
     * @var string $request_key_value filter value
     */
    private $request_key_value;

    public function __construct()
    {
        if (!$this->request_key_name) {
            $this->setRequestKeyName();
        }

        $this->setFilterValue();
    }

    /**
     * Database query filter
     *
     * @param Builder $builder Database eloquent model instance
     * @param Closure $next
     * @return mixed
     */
    public function handle(Builder $builder, Closure $next): Builder
    {
        if (!request()->has($this->request_key_name) OR $this->skipFilterIf()) {
            return $next($builder);
        }

        return $next($this->applyFilters($builder, $this->request_key_value));
    }

    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected abstract function applyFilters(Builder $builder, $value): Builder;

    /**
     * Skip filtering value condition
     *
     * @return bool
     */
    protected function skipFilterIf(){
        return $this->request_key_value === null;
    }

    /**
     * Set Filter name
     *
     * @return void
     */
    private function setRequestKeyName(): void
    {
        $class_base_name = class_basename($this);

        $this->request_key_name = (string)Str::of($class_base_name)
            ->snake()
            ->beforeLast('_query');
    }

    /**
     * Set Filter value
     *
     * @return void
     */
    private function setFilterValue(): void
    {
        $this->request_key_value = request($this->request_key_name);
    }
}

Controller.php

<?php

namespace App\Http\Controllers;

class LessonController extends Controller
{
  /**
     * Search result
     *
     * @param Request $request
     * @return Application|Factory|View|Response
     */
    public function search(Request $request)
    {
        $lessons = app(Pipeline::class)
            ->send(Lesson::with('topic.subject'))
            ->through([
                TopicIdQuery::class,
                NameQuery::class,
                Lesson_SubjectIdQuery::class
            ])
            ->thenReturn()
            ->paginate(25);

        return view('actions.lesson.index', compact('lessons'))
            ->with($this->meta);
    }
}

Globals_NameExactQuery.php

<?php


namespace App\QueryFilters\Globals;


use App\QueryFilters\BaseFilter;
use Illuminate\Database\Eloquent\Builder;

class NameExactQuery extends BaseFilter
{
    protected $request_key_name = 'name';
    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected function applyFilters(Builder $builder, $value): Builder
    {
        return $builder->where('name', $value);
    }
}

Globals_NameQuery.php

<?php


namespace App\QueryFilters\Globals;


use App\QueryFilters\BaseFilter;
use Illuminate\Database\Eloquent\Builder;

class NameQuery extends BaseFilter
{

    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected function applyFilters(Builder $builder, $value): Builder
    {
        return $builder->where('name', "like", "%". $value ."%");
    }
}

Globals_TopicIdQuery.php

<?php


namespace App\QueryFilters\Globals;


use App\QueryFilters\BaseFilter;
use Illuminate\Database\Eloquent\Builder;

class TopicIdQuery extends BaseFilter
{
    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected function applyFilters(Builder $builder, $value): Builder
    {
        return $builder->where('topic_id', $value);
    }
}

NameExactQuery.php

<?php


namespace App\QueryFilters\Globals;


use App\QueryFilters\BaseFilter;
use Illuminate\Database\Eloquent\Builder;

class NameExactQuery extends BaseFilter
{
    protected $request_key_name = 'name';
    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected function applyFilters(Builder $builder, $value): Builder
    {
        return $builder->where('name', $value);
    }
}

NameQuery.php

<?php


namespace App\QueryFilters\Globals;


use App\QueryFilters\BaseFilter;
use Illuminate\Database\Eloquent\Builder;

class NameQuery extends BaseFilter
{

    /**
     * Apply the filter
     *
     * @param Builder $builder Eloquent Query builder
     * @param mixed $value Request key value
     * @return Builder Eloquent Builder instance
     */
    protected function applyFilters(Builder $builder, $value): Builder
    {
        return $builder->where('name', "like", "%". $value ."%");
    }
}

QueryFilterContract.php

<?php


namespace App\QueryFilters;


use Closure;
use Illuminate\Database\Eloquent\Builder;

interface QueryFilterContract
{
    /**
     * Database query filter
     *
     * @param Builder $builder Database eloquent model instance
     * @param Closure $next
     * @return mixed
     */
    public function handle(Builder $builder, Closure $next): Builder;
}