class.ilLSItemsQueries.php

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<?php declare(strict_types=1);

class ilLSLearnerItemsQueries
{
    public function __construct(
        ilLearnerProgressDB $progress_db,
        ilLSStateDB $states_db,
        int $ls_ref_id,
        int $usr_id
    ) {
        $this->progress_db = $progress_db;
        $this->states_db = $states_db;
        $this->ls_ref_id = $ls_ref_id;
        $this->usr_id = $usr_id;
    }

    public function getItems() : array
    {
        return $this->progress_db->getLearnerItems($this->usr_id, $this->ls_ref_id);
    }

    public function getCurrentItemRefId() : int
    {
        $current = $this->states_db->getCurrentItemsFor($this->ls_ref_id, [$this->usr_id]);
        $ref_id = max(0, $current[$this->usr_id]); //0 or greater
        return $ref_id;
    }

    public function getCurrentItemPosition() : int
    {
        $current_position = 0;
        $items = $this->getItems();
        foreach ($items as $index => $item) {
            if ($item->getRefId() === $this->getCurrentItemRefId()) {
                $current_position = $index;
            }
        }
        return $current_position;
    }

    public function getStateFor(LSItem $ls_item, \ILIAS\KioskMode\View $view) : ILIAS\KioskMode\State
    {
        $states = $this->states_db->getStatesFor($this->ls_ref_id, [$this->usr_id]);
        $states = $states[$this->usr_id];

        if (array_key_exists($ls_item->getRefId(), $states)) {
            return $states[$ls_item->getRefId()];
        }
        return $view->buildInitialState(
            new ILIAS\KioskMode\State()
        );
    }

    public function storeState(
        ILIAS\KioskMode\State $state,
        int $state_item_ref_id,
        int $current_item_ref_id
    ) {
        $this->states_db->updateState(
            $this->ls_ref_id,
            $this->usr_id,
            $state_item_ref_id,
            $state,
            $current_item_ref_id
        );
    }

    public function getFirstAccess()
    {
        $first_access = $this->states_db->getFirstAccessFor($this->ls_ref_id, [$this->usr_id]);
        return $first_access[$this->usr_id];
    }
}