class.ilEventHandlingDefinitionProcessor.php

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<?php

declare(strict_types=1);

class ilEventHandlingDefinitionProcessor implements ilComponentDefinitionProcessor
{
    protected array $data = [];
    protected ?string $component;

    public function getData(): array
    {
        return $this->data;
    }

    public function purge(): void
    {
        $this->data = [];
    }

    public function beginComponent(string $component, string $type): void
    {
        $this->component = $type . "/" . $component;
    }

    public function endComponent(string $component, string $type): void
    {
        $this->component = null;
    }

    public function beginTag(string $name, array $attributes): void
    {
        if ($name !== "event") {
            return;
        }

        $component = $attributes["component"] ?? null;
        if (!$component) {
            $component = $this->component;
        }

        $event = [
            "component" => $component,
            "type" => $attributes["type"],
            "type_specification" => $attributes["id"]
        ];

        // only add event to data if no such entry exists
        if (!$this->hasDataEntryForEvent($event)) {
            $this->data[] = $event;
        }
    }

    public function endTag(string $name): void
    {
    }

    public function hasDataEntryForEvent($event): bool
    {
        return in_array($event, $this->data, true);
    }
}