ImageMapRetrieval.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\COPage\PC\MediaObject;
 
use ILIAS\Data\Order;
use ILIAS\Data\Range;
use ILIAS\Repository\RetrievalBase;
use ILIAS\Repository\RetrievalInterface;
 
class ImageMapRetrieval implements RetrievalInterface
{
    use RetrievalBase;
 
    protected ?array $data = null;
 
    public function __construct(
        protected \ilPCInteractiveImage|\ilPCMediaObject $content_obj,
        protected string $parent_node_name
    ) {
    }
 
    public function getData(
        array $fields,
        ?Range $range = null,
        ?Order $order = null,
        array $filter = [],
        array $parameters = []
    ): \Generator {
        $data = $this->applyOrder($this->collectData(), $order);
        $data = $this->applyRange($data, $range);
 
        foreach ($data as $row) {
            yield $row;
        }
    }
 
    public function count(array $filter = [], array $parameters = []): int
    {
        return count($this->collectData());
    }
 
    public function isFieldNumeric(string $field): bool
    {
        return $field === "id";
    }
 
    protected function collectData(): array
    {
        if ($this->data !== null) {
            return $this->data;
        }
 
        $alias_item = new \ilMediaAliasItem(
            $this->content_obj->getDomDoc(),
            $this->content_obj->hier_id,
            "Standard",
            $this->content_obj->getPCId(),
            $this->parent_node_name
        );
        $data = [];
        foreach ($alias_item->getMapAreas() as $area) {
            $link = $area["Link"] ?? [];
            $link_type = strtolower($link["LinkType"] ?? "");
            $link_type = match ($link_type) {
                "extlink" => "ext",
                "intlink" => "int",
                default => $link_type
            };
            $data[] = [
                "id" => (int) $area["Nr"],
                "title" => $link["Title"] ?? "",
                "shape" => $area["Shape"],
                "coords" => implode(", ", explode(",", $area["Coords"])),
                "highlight_mode" => $area["HighlightMode"],
                "highlight_class" => $area["HighlightClass"],
                "link_type" => $link_type,
                "href" => $link["Href"] ?? "",
                "target" => $link["Target"] ?? "",
                "type" => $link["Type"] ?? "",
                "target_frame" => $link["TargetFrame"] ?? ""
            ];
        }
 
        usort(
            $data,
            static fn(array $left, array $right): int => strcasecmp($left["title"], $right["title"])
        );
 
        return $this->data = $data;
    }
}