class.ilTimelineGUI.php

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<?php

class ilTimelineGUI
{
    protected array $items = [];
    protected ilLanguage $lng;
    protected ilGlobalTemplateInterface $tpl;

    protected function __construct()
    {
        global $DIC;

        $this->lng = $DIC->language();
        $this->tpl = $DIC->ui()->mainTemplate();
    }

    public static function getInstance(): self
    {
        return new self();
    }

    public function addItem(ilTimelineItemInt $a_item): void
    {
        $this->items[] = $a_item;
    }

    public function render(
        bool $a_items_only = false
    ): string {
        $debug = false;
        if ($debug) {
            $this->tpl->addJavaScript("../components/ILIAS/News/resources/Timeline.js");
        } else {
            $this->tpl->addJavaScript("assets/js/Timeline.js");
        }

        $t = new ilTemplate("tpl.timeline.html", true, true, "components/ILIAS/News/Timeline");
        if (!$a_items_only) {
            $t->touchBlock("list_start");
            $t->touchBlock("list_end");
        }
        $keys = array_keys($this->items);
        foreach ($this->items as $k => $i) {
            $next = null;
            if (isset($keys[$k + 1], $this->items[$keys[$k + 1]])) {
                $next = $this->items[$keys[$k + 1]];
            }

            $dt = $i->getDateTime();
            if (is_null($next) || $dt->get(IL_CAL_FKT_DATE, "Y-m-d") !== $next->getDateTime()->get(IL_CAL_FKT_DATE, "Y-m-d")) {
                $t->setCurrentBlock("badge");
                $t->setVariable("DAY", $dt->get(IL_CAL_FKT_DATE, "d"));
                $t->setVariable("MONTH", $this->lng->txt("month_" . $dt->get(IL_CAL_FKT_DATE, "m") . "_short"));
                $t->parseCurrentBlock();
            }

            $t->setCurrentBlock("item");
            $t->setVariable("CONTENT", $i->render());
            $t->setVariable("FOOTER", $i->renderFooter());
            $t->parseCurrentBlock();
        }
        return $t->get();
    }
}