class.ilMailLuceneQueryParser.php

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<?php

declare(strict_types=1);

class ilMailLuceneQueryParser extends ilLuceneQueryParser
{
    protected array $fields = [];

    public function parse(): void
    {
        if ($this->getFields()) {
            $queried_fields = [];
            $token_operator = ' OR ';
            if (ilSearchSettings::getInstance()->getDefaultOperator() === ilSearchSettings::OPERATOR_AND) {
                $token_operator = ' AND ';
            }

            foreach ($this->getFields() as $field => $status) {
                if (!$status) {
                    continue;
                }

                $field_query = '';
                $tokens = array_map(trim(...), explode(' ', $this->query_string));
                foreach ($tokens as $token) {
                    if ($field_query !== '') {
                        $field_query .= $token_operator;
                    }
                    $field_query .= '(' . $field . ':' . $token . ')';
                }

                $queried_fields[] = '(' . $field_query . ')';
            }

            if ($queried_fields !== []) {
                $this->parsed_query = implode(' OR ', $queried_fields);
                return;
            }
        }

        parent::parse();
    }

    public function setFields(array $fields): void
    {
        $this->fields = $fields;
    }

    public function getFields(): array
    {
        return $this->fields;
    }
}