Schedule Formatter

php

<?php

use Carbon\Carbon;
use October\Rain\Database\Collection;

/**
 * Class ScheduleFormatter
 */
class ScheduleFormatter
{
    /**
     * @var array
     */
    protected $cache = [];
    /**
     * @var string
     */
    protected $keyStartTime;
    /**
     * @var string
     */
    protected $keyEndTime;

    /**
     * @var
     */
    protected $keyDayOfWeek;

    /**
     * ScheduleFormatter constructor.
     *
     * @param Collection $collection
     * @param string $keyStartTime - Ключ времени начала раб. дня.
     * @param string $keyEndTime   - Ключ времени окончания раб. дня.
     * @param string $keyDayOfWeek - Ключ значения календарного дня недели
     */
    public function __construct(Collection $collection, string $keyStartTime = 'start_time', string $keyEndTime = 'end_time', string $keyDayOfWeek = 'day_of_week')
    {
        $this->keyStartTime = $keyStartTime;
        $this->keyEndTime   = $keyEndTime;
        $this->keyDayOfWeek = $keyDayOfWeek;

        $this->parse($collection);
    }

    /**
     * @param Collection $collection
     */
    protected function parse(Collection $collection): void
    {
        $collection->groupBy($this->keyStartTime)->each(function($items, $key) use(&$cache) {
            $times = [];
            $items->each(function($item) use(&$times, $key) {
                $times[$key .' - '. $item->{$this->keyEndTime}][] = $item->{$this->keyDayOfWeek};
            });

            $this->cache = $this->cache + $times;
        });
    }

    /**
     * @return array
     */
    public function all(): array
    {
        return \array_map(static function($items) {
            return \array_map(static function($dayOfWeek) {
                return Carbon::getDays()[$dayOfWeek];
            }, $items);
        }, $this->cache);
    }

    /**
     * @return string
     */
    public function render(): string
    {
        $schedule = \array_map(static function($days) {
            return implode(', ', $days);
        }, $this->all());

        if (\count($schedule) === 1) {
            return "Ежедневно ". array_keys($schedule)[0];
        }

        $return = [];
        foreach($schedule as $time => $days) {
            $return[] = $days .' '. $time;
        }

        return implode("\n", $return);
    }

    /**
     * @return string
     */
    public function __toString(): string
    {
        return $this->render();
    }
}