StateSeries.php

<?php

namespace FSMgasm;

class StateSeries extends StateHolder
{

    protected bool $skipping = false;

    public function addNext(State $state): void
    {
        $this->states[$this->key() + 1] = $state;
    }

    /**
     * @param State[] $newStates
     * @return void
     */
    public function addNextList(array $newStates): void
    {
        $index = 1;
        foreach ($newStates as $state) {
            $this->states[$this->key() + $index] = $state;
            ++$index;
        }
    }

    public function skip(): void
    {
        $this->skipping = true;
    }

    protected function onStart(): void
    {
        if (empty($this->states)) {
            $this->end();
            return;
        }

        $this->current()->start();
    }

    protected function onUpdate(): void
    {
        $this->current()->update();

        if (($this->current()->isReadyToEnd() && !$this->current()->isFrozen()) || $this->skipping) {
            if ($this->skipping) {
                $this->skipping = false;
            }

            $this->current()->end();
            $this->next();

            if ($this->key() >= count($this->states)) {
                $this->end();
                return;
            }

            $this->current()->start();
        }
    }

    public function isReadyToEnd(): bool
    {
        return ($this->key() == count($this->states) - 1 && $this->current()->isReadyToEnd());
    }

    protected function onEnd(): void
    {
        if ($this->key() < count($this->states)) {
            $this->current()->end();
        }
    }

    protected function getDuration(): int
    {
        $duration = 0;

        foreach ($this->states as $state) {
            $duration += $state->getDuration();
        }

        return $duration;
    }
}