BeverageMaker test

BeverageMaker.php

<?php

class BeverageMaker
{
    const TYPE_COFFEE = 'coffee';
    const TYPE_TEA = 'tea';
    const STATUS_NO_WATER = "no water";
    const STATUS_NO_SOLID = "no solid";
    const STATUS_READY = "I'm ready";
    const STATUS_BROKEN = "broken";
    const STATUS_BREWING = 'brewing';
    const PLANNED_OBSOLESCENCE = '1000';
    
    public $beverageType;
    public $waterCapacity;
    public $solidCapacity;
    public $currentWater;
    public $currentSolid;
    public $waterPerCup;
    public $solidPerCup;
    public $cupsCounter;
    public $stopFile;

    public function __construct($beverage_type, $water_capacity, $solid_capacity)
    {
        $this->waterCapacity = $water_capacity;
        $this->solidCapacity = $solid_capacity;
        $this->beverageType = $beverage_type;
        $this->cupsCounter = 0;
        $this->stopFile = 'stop'.rand(1, 10000);
        switch ($beverage_type) {
            case self::TYPE_TEA:
                $this->liquidPerCup = '200';
                $this->solidPerCup = '10';
                break;
            case self::TYPE_COFFEE:
            default:
                $this->liquidPerCup = '100';
                $this->solidPerCup = '25';
                break;
        }
        $this->status = self::STATUS_NO_WATER;
    }

    public function brew($numberOfCups = 1)
    {
        if ($this->cupsCounter < self::PLANNED_OBSOLESCENCE) {
            if ($this->currentWater >= $this->liquidPerCup * $numberOfCups) {
                if ($this->currentSolid >= $this->solidPerCup * $numberOfCups) {
                    $this->status = self::STATUS_BREWING;
                    for ($i = 1; $i <= $numberOfCups; $i++) {
                        $stopFile = fopen($this->stopFile, 'r+');
                        $stop = fgets($stopFile);
                        if ($stop != 'yes') {
                            if ($this->beverageType == self::TYPE_COFFEE) {
                                echo 'Grinding';
                            }
                            echo 'Brewing';
                            $this->currentWater = $this->currentWater - $this->liquidPerCup;
                            $this->cupsCounter = $this->cupsCounter + 1;
                            echo 'Enjoy your '.$this->beverageType.'\n';
                        } else {
                            fwrite($stopFile, 'no');
                            fclose($stopFile);

                            return;
                        }
                    }
                    $this->status = self::STATUS_READY;
                } else {
                    echo 'I need more '.$this->beverageType;
                }
            } else {
                echo 'I need more water';
            }
        } else {
            echo 'Error';
        }
    }

    public static function stop(BeverageMaker $beverageMaker)
    {
        $stopFile = fopen($beverageMaker->stopFile, 'w');
        fwrite($stopFile, 'yes');
    }

    public function addWater($water)
    {
        if ($water + $this->currentWater <= $this->waterCapacity) {
            $this->currentWater = $water + $this->currentWater;
        } else {
            if ($water + $this->currentWater > $this->waterCapacity) {
                $this->currentWater = $this->waterCapacity;

                return $water + $this->currentWater - $this->waterCapacity;
            }
        }

        return true;
    }

    public function addSolid($solid)
    {
        if ($solid + $this->currentSolid <= $this->solidCapacity) {
            $this->currentSolid = $solid + $this->currentWater;
        } else {
            if ($solid + $this->currentSolid > $this->solidCapacity) {
                $this->currentSolid = $this->solidCapacity;

                return $solid + $this->currentSolid - $this->solidCapacity;
            }
        }

        return true;
    }

    public function clean()
    {
        $this->currentWater = $this->currentWater - 50;
    }
}