class.ilTaxAssignInputGUI.php

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<?php

class ilTaxAssignInputGUI extends ilSelectInputGUI
{
    protected bool $include_please_select;
    protected int $taxononmy_id;

    public function __construct(
        int $a_taxonomy_id,
        bool $a_multi = true,
        string $a_title = "",
        string $a_postvar = "",
        bool $a_include_please_select = true
    ) {
        global $DIC;

        $this->lng = $DIC->language();
        $lng = $DIC->language();

        $lng->loadLanguageModule("tax");
        $this->setMulti($a_multi);
        $this->include_please_select = $a_include_please_select;

        if ($a_title == "") {
            $a_title = $lng->txt("tax_taxonomy");
        }

        if ($a_postvar == "") {
            $a_postvar = "tax_node_assign";
        }

        parent::__construct($a_title, $a_postvar);
        $this->setType("tax_assign");

        if ((int) $a_taxonomy_id == 0) {
            throw new ilTaxonomyException("No taxonomy ID passed to ilTaxAssignInputGUI.");
        }

        $this->setTaxonomyId((int) $a_taxonomy_id);
    }

    public function setTaxonomyId(int $a_val): void
    {
        $this->taxononmy_id = $a_val;
    }

    public function getTaxonomyId(): int
    {
        return $this->taxononmy_id;
    }

    public function setOptions($a_options): void
    {
        throw new ilTaxonomyException("setOptions: Not supported for ilTaxAssignInputGUI.");
    }

    public function getOptions(): array
    {
        $lng = $this->lng;

        $options = [];
        if ($this->include_please_select) {
            $options = array("" => $lng->txt("please_select"));
        }

        $tax_tree = new ilTaxonomyTree($this->getTaxonomyId());

        $nodes = $tax_tree->getSubTree($tax_tree->getNodeData($tax_tree->readRootId()));
        foreach ($nodes as $n) {
            if ($n["type"] == "taxn") {
                $options[$n["child"]] = str_repeat("&nbsp;", ($n["depth"] - 2) * 2) . $n["title"];
            }
        }

        return $options;
    }

    public function saveInput(
        string $a_component_id,
        int $a_obj_id,
        string $a_item_type,
        int $a_item_id
    ): void {
        $tax_node_ass = new ilTaxNodeAssignment($a_component_id, $a_obj_id, $a_item_type, $this->getTaxonomyId());

        $body = $this->request->getParsedBody();
        $post = $body[$this->getPostVar()] ?? "";

        if (!$this->getMulti()) {
            $post = array($post);
        } elseif (!is_array($post)) {
            // BH: when multi values are ENABLED and $form->checkInput is NOT called
            // there is no post parameter available WHEN the selection is left empty
            // - fixed mantis #22186 - the followup issue
            $post = array();
        }

        $current_ass = $tax_node_ass->getAssignmentsOfItem($a_item_id);
        $exising = array();
        foreach ($current_ass as $ca) {
            if (!in_array($ca["node_id"], $post)) {
                $tax_node_ass->deleteAssignment((int) $ca["node_id"], $a_item_id);
            } else {
                $exising[] = (int) $ca["node_id"];
            }
        }

        foreach ($post as $p) {
            if (!in_array((int) $p, $exising)) {
                $tax_node_ass->addAssignment((int) $p, $a_item_id);
            }
        }
    }

    public function setCurrentValues(
        string $a_component_id,
        int $a_obj_id,
        string $a_item_type,
        int $a_item_id
    ): void {
        $tax_node_ass = new ilTaxNodeAssignment($a_component_id, $a_obj_id, $a_item_type, $this->getTaxonomyId());
        $ass = $tax_node_ass->getAssignmentsOfItem($a_item_id);

        $nodes = array();
        foreach ($ass as $a) {
            $nodes[] = $a["node_id"];
        }
        if ($this->getMulti()) {
            $this->setValue($nodes);
        } else {
            $this->setValue($nodes[0]);
        }
    }
}