class.ilBiblLibraryPresentationGUI.php

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<?php

class ilBiblLibraryPresentationGUI
{
    public function __construct(
        protected \ilBiblLibraryInterface $library,
        protected \ilBiblFactoryFacade $facade,
        protected \ilCtrlInterface $ctrl,
        protected \ilLanguage $lng,
        protected \ILIAS\DI\UIServices $ui
    ) {
    }

    public function generateLibraryLink(ilBiblEntry $entry, string $type): string
    {
        $attributes = $this->facade->entryFactory()->loadParsedAttributesByEntryId($entry->getId());
        $type = $this->facade->typeFactory()->getInstanceForString($type);
        $attr = [];
        $prefix = '';
        switch ($type->getId()) {
            case ilBiblTypeFactoryInterface::DATA_TYPE_BIBTEX:
                $prefix = "bib_default_";
                if (!empty($attributes[$prefix . "isbn"])) {
                    $attr = array("isbn");
                } elseif (!empty($attributes[$prefix . "pmid"])) {
                    $attr = array("pmid");
                } elseif (!empty($attributes[$prefix . "doi"])) {
                    $attr = array("doi");
                } elseif (!empty($attributes[$prefix . "issn"])) {
                    $attr = array("issn");
                } else {
                    $attr = array("title", "author", "year", "number", "volume");
                }
                break;
            case ilBiblTypeFactoryInterface::DATA_TYPE_RIS:
                $prefix = "ris_" . strtolower($entry->getType()) . "_";
                if (!empty($attributes[$prefix . "sn"])) {
                    $attr = array("sn");
                } elseif (!empty($attributes[$prefix . "do"])) {
                    $attr = array("do");
                } else {
                    $attr = array("ti", "t1", "au", "py", "is", "vl");
                }
                break;
        }

        $url_params = "?";
        if (count($attr) === 1) {
            if (($attr[0] === "doi") || ($attr[0] === "pmid")) {
                $url_params .= "id=" . $this->formatAttribute($attr[0], $type, $attributes, $prefix)
                    . "%3A" . $attributes[$prefix . $attr[0]];
            } elseif ($attr[0] === "do") {
                $url_params .= "id=" . $this->formatAttribute($attr[0], $type, $attributes, $prefix)
                    . "i%3A" . $attributes[$prefix . $attr[0]];
            } else {
                $url_params .= $this->formatAttribute($attr[0], $type, $attributes, $prefix) . "="
                    . urlencode($attributes[$prefix . $attr[0]]);
            }
        } else {
            foreach ($attr as $a) {
                if (array_key_exists($prefix . $a, $attributes)) {
                    if (strlen($url_params) > 1) {
                        $url_params .= "&";
                    }
                    $url_params .= $this->formatAttribute($a, $type, $attributes, $prefix) . "="
                        . urlencode($attributes[$prefix . $a]);
                }
            }
        }

        return $this->library->getUrl() . $url_params;
    }

    public function getButton(ilBiblFactoryFacadeInterface $bibl_factory_facade, ilBiblEntry $entry)
    {
        $action = $this->generateLibraryLink($entry, $bibl_factory_facade->type()->getStringRepresentation());
        if (null !== ($img_path = $this->library->getImg())) {
            $icon = $this->ui->factory()->symbol()->icon()->custom($img_path, "");
            $btn_online_link = $this->ui->factory()->button()->bulky(
                $icon,
                $this->lng->txt('bibl_link_online'),
                $action
            );
        } else {
            $btn_online_link = $this->ui->factory()->button()->standard(
                $this->lng->txt('bibl_link_online'),
                $action
            );
        }

        return $this->ui->renderer()->render($btn_online_link);
    }

    public function formatAttribute(string $a, ilBiblTypeInterface $type, array $attributes, string $prefix): string
    {
        if ($type->getStringRepresentation() === 'ris') {
            switch ($a) {
                case 't1':
                case 'ti':
                    $a = "title";
                    break;
                case 'au':
                    $a = "author";
                    break;
                case 'sn':
                    if (strlen($attributes[$prefix . "sn"]) <= 9) {
                        $a = "issn";
                    } else {
                        $a = "isbn";
                    }
                    break;
                case 'py':
                    $a = "date";
                    break;
                case 'is':
                    $a = "issue";
                    break;
                case 'vl':
                    $a = "volume";
                    break;
            }
        } elseif ($type->getStringRepresentation() === 'bib') {
            switch ($a) {
                case 'number':
                    $a = "issue";
                    break;
                case 'year':
                    $a = "date";
                    break;
            }
        }

        return $a;
    }
}