class.ilSelectInputGUI.php

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<?php

declare(strict_types=1);

class ilSelectInputGUI extends ilSubEnabledFormPropertyGUI implements ilTableFilterItem, ilToolbarItem, ilMultiValuesItem
{
    protected array $cust_attr = array();
    protected array $options = array();
    protected ?\Closure $langresolve = null;
    protected $value;
    protected bool $hide_sub = false;

    public function __construct(
        string $a_title = "",
        string $a_postvar = ""
    ) {
        global $DIC;

        $this->lng = $DIC->language();
        parent::__construct($a_title, $a_postvar);
        $this->setType("select");
    }

    public function setOptions(array $a_options): void
    {
        $this->options = $a_options;
    }

    public function getOptions(): array
    {
        return $this->options ?: array();
    }

    public function setOptionsLangAttribute(\Closure $langresolve): void
    {
        $this->langresolve = $langresolve;
    }

    public function getOptionsLangAttribute($key): string
    {
        return $this->langresolve($this->getOptions(), $key);
    }

    public function setValue($a_value): void
    {
        if ($this->getMulti() && is_array($a_value)) {
            $this->setMultiValues($a_value);
            $a_value = array_shift($a_value);
        }
        $this->value = $a_value;
    }

    public function getValue()
    {
        return $this->value;
    }


    public function setValueByArray(array $a_values): void
    {
        $this->setValue($a_values[$this->getPostVar()] ?? "");
        foreach ($this->getSubItems() as $item) {
            $item->setValueByArray($a_values);
        }
    }

    public function checkInput(): bool
    {
        $lng = $this->lng;

        $valid = true;
        if (!$this->getMulti()) {
            if ($this->getRequired() && trim($this->str($this->getPostVar())) == "") {
                $valid = false;
            } elseif (!array_key_exists($this->str($this->getPostVar()), $this->getOptions())) {
                $this->setAlert($lng->txt('msg_invalid_post_input'));
                return false;
            }
        } else {
            $values = $this->strArray($this->getPostVar());
            foreach ($values as $value) {
                if (!array_key_exists($value, $this->getOptions())) {
                    $this->setAlert($lng->txt('msg_invalid_post_input'));
                    return false;
                }
            }
            if ($this->getRequired() && !trim(implode("", $values))) {
                $valid = false;
            }
        }
        if (!$valid) {
            $this->setAlert($lng->txt("msg_input_is_required"));
            return false;
        }
        return $this->checkSubItemsInput();
    }

    public function getInput()
    {
        if (!$this->getMulti()) {
            return $this->str($this->getPostVar());
        }
        return $this->strArray($this->getPostVar());
    }

    public function addCustomAttribute(string $a_attr): void
    {
        $this->cust_attr[] = $a_attr;
    }

    public function getCustomAttributes(): array
    {
        return $this->cust_attr;
    }

    public function render($a_mode = ""): string
    {
        $sel_value = "";
        $tpl = new ilTemplate("tpl.prop_select.html", true, true, "Services/Form");

        foreach ($this->getCustomAttributes() as $attr) {
            $tpl->setCurrentBlock('cust_attr');
            $tpl->setVariable('CUSTOM_ATTR', $attr);
            $tpl->parseCurrentBlock();
        }

        if ($this->getRequired()) {
            $tpl->setCurrentBlock('required_attribute');
            $tpl->setVariable('REQUIRED', 'required');
            $tpl->parseCurrentBlock();
        }

        // determine value to select. Due to accessibility reasons we
        // should always select a value (per default the first one)
        $first = true;
        foreach ($this->getOptions() as $option_value => $option_text) {
            if ($first) {
                $sel_value = $option_value;
            }
            $first = false;
            if ((string) $option_value == (string) $this->getValue()) {
                $sel_value = $option_value;
            }
        }
        foreach ($this->getOptions() as $option_value => $option_text) {
            $tpl->setCurrentBlock("prop_select_option");
            $tpl->setVariable("VAL_SELECT_OPTION", ilLegacyFormElementsUtil::prepareFormOutput((string) $option_value));
            if ((string) $sel_value == (string) $option_value) {
                $tpl->setVariable(
                    "CHK_SEL_OPTION",
                    ' selected="selected"'
                );
            }
            $tpl->setVariable("TXT_SELECT_OPTION", $option_text);

            if ($this->langresolve) {
                $f = $this->langresolve;
                $lang = $f($this->getOptions(), $option_value);
                $tpl->setVariable("OPTION_LANG", ' lang="' . $lang . '"');
            }

            $tpl->parseCurrentBlock();
        }
        $tpl->setVariable("ID", $this->getFieldId());

        $postvar = $this->getPostVar();
        if ($this->getMulti() && substr($postvar, -2) != "[]") {
            $postvar .= "[]";
        }

        $tpl->setVariable("POST_VAR", $postvar);
        if ($this->getDisabled()) {
            if ($this->getMulti()) {
                $value = $this->getMultiValues();
                $hidden = "";
                if (is_array($value)) {
                    foreach ($value as $item) {
                        $hidden .= $this->getHiddenTag($postvar, $item);
                    }
                }
            } else {
                $hidden = $this->getHiddenTag($postvar, (string) $this->getValue());
            }
            if ($hidden) {
                $tpl->setVariable("DISABLED", " disabled=\"disabled\"");
                $tpl->setVariable("HIDDEN_INPUT", $hidden);
            }
        }

        // multi icons
        if ($this->getMulti() && !$a_mode && !$this->getDisabled()) {
            $tpl->touchBlock("inline_in_bl");
            $tpl->setVariable("MULTI_ICONS", $this->getMultiIconsHTML());
        }

        $tpl->setVariable("ARIA_LABEL", ilLegacyFormElementsUtil::prepareFormOutput($this->getTitle()));

        return $tpl->get();
    }

    public function insert(ilTemplate $a_tpl): void
    {
        $a_tpl->setCurrentBlock("prop_generic");
        $a_tpl->setVariable("PROP_GENERIC", $this->render());
        $a_tpl->parseCurrentBlock();
    }

    public function getTableFilterHTML(): string
    {
        $html = $this->render();
        return $html;
    }

    public function getToolbarHTML(): string
    {
        $html = $this->render("toolbar");
        return $html;
    }

    public function setHideSubForm(
        bool $a_value,
        ?string $a_condition = null
    ): void {
        $this->hide_sub = $a_value;

        if ($a_condition) {
            $this->addCustomAttribute('onchange="if(this.value ' . $a_condition . ')' .
                ' { il.Form.showSubForm(\'subform_' . $this->getFieldId() . '\', \'il_prop_cont_' . $this->getFieldId() . '\'); }' .
                ' else { il.Form.hideSubForm(\'subform_' . $this->getFieldId() . '\'); };"');
        }
    }

    public function hideSubForm(): bool
    {
        return $this->hide_sub;
    }
}