class.ilMailUserActionProvider.php

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<?php

class ilMailUserActionProvider extends ilUserActionProvider
{
    public static array $user_access = [];

    public function checkUserMailAccess(int $a_user_id): bool
    {
        global $DIC;

        $rbacsystem = $DIC['rbacsystem'];

        if (!isset(self::$user_access[$a_user_id])) {
            self::$user_access[$a_user_id] =
                $rbacsystem->checkAccessOfUser($a_user_id, 'internal_mail', ilMailGlobalServices::getMailObjectRefId());
        }
        return (bool) self::$user_access[$a_user_id];
    }

    public function getComponentId(): string
    {
        return "mail";
    }

    public function getActionTypes(): array
    {
        return [
            "compose" => $this->lng->txt("mail")
        ];
    }

    public function collectActionsForTargetUser(int $a_target_user): ilUserActionCollection
    {
        $coll = new ilUserActionCollection();

        // check mail permission of user
        if ($this->getUserId() == ANONYMOUS_USER_ID || !$this->checkUserMailAccess($this->getUserId())) {
            return $coll;
        }

        // check mail permission of target user
        if ($this->checkUserMailAccess($a_target_user)) {
            $f = new ilUserAction();
            $f->setType("compose");
            $f->setText($this->lng->txt("mail"));
            $tn = ilObjUser::_lookupName($a_target_user);
            $f->setHref(ilMailFormCall::getLinkTarget("", '', [], ['type' => 'new', 'rcp_to' => $tn["login"]]));
            $coll->addAction($f);
        }

        return $coll;
    }
}