class.ilMailAutoCompleteSentMailsRecipientsProvider.php

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<?php

declare(strict_types=1);

class ilMailAutoCompleteSentMailsRecipientsProvider extends ilMailAutoCompleteRecipientProvider
{
    private array $users_stack = [];

    public function current(): array
    {
        if (is_array($this->data) && !empty($this->data)) {
            return [
                'login' => $this->data['login'],
                'firstname' => '',
                'lastname' => '',
            ];
        }

        if ($this->users_stack !== []) {
            return [
                'login' => array_shift($this->users_stack),
                'firstname' => '',
                'lastname' => '',
            ];
        }

        throw new OutOfBoundsException('No more users available');
    }

    public function key(): string
    {
        if (is_array($this->data) && !empty($this->data)) {
            return $this->data['login'];
        }

        if ($this->users_stack !== []) {
            return $this->users_stack[0]['login'];
        }

        return '';
    }

    public function valid(): bool
    {
        $this->data = $this->db->fetchAssoc($this->res);
        if (is_array($this->data) &&
            !empty($this->data) &&
            (
                strpos($this->data['login'], ',') ||
                strpos($this->data['login'], ';')
            )) {
            $parts = array_filter(
                array_map(
                    'trim',
                    preg_split("/[ ]*[;,][ ]*/", trim($this->data['login']))
                )
            );

            foreach ($parts as $part) {
                if (ilStr::strPos(ilStr::strToLower($part), ilStr::strToLower($this->term), 0) !== false) {
                    $this->users_stack[] = $part;
                }
            }

            if ($this->users_stack) {
                $this->data = null;
            }
        }

        return (is_array($this->data) && !empty($this->data)) || $this->users_stack !== [];
    }

    public function rewind(): void
    {
        if ($this->res !== null) {
            $this->db->free($this->res);
            $this->res = null;
        }

        $query = "
                        SELECT DISTINCT
                                mail.rcp_to login
                        FROM mail
                        WHERE " . $this->db->like('mail.rcp_to', 'text', $this->quoted_term) . "
                        AND mail.rcp_to IS NOT NULL AND mail.rcp_to != ''
                        AND sender_id = " . $this->db->quote($this->user_id, 'integer') . "
                        AND mail.sender_id = mail.user_id";

        $this->res = $this->db->query($query);
    }
}