/*
     * Process the file, sent in the constructor.
     * Return: Array with 1 or false. false on error.
     */
    public function processFile() {
        global $wpdb;
        $tariffs = $this->loadedFile;
        $tableName = $wpdb->prefix."aranceles";

        if(empty($tariffs)){
            error_log("Problem transform or loading import file.");
            return;
        }
        $insertReturns = [];
        $wpdb->query( 'SET autocommit = 0;' );
        foreach ($tariffs as $row) {
            $insert = "INSERT INTO '$tableName'
                (internal_id, service_detail, particular_value, particular_non_business,
                fonasa_value, fonasa_non_business, isapre_value, isapre_non_business, med_value,
                pacakge_value, fonasa_code, category, subcategory)
                VALUES (%s, %s, %d, %d, %d, %d, %d, %d, %d, %d, %s, %s, %s)
                ON DUPLICATE KEY UPDATE service_detail=VALUES(service_detail),
                particular_value=VALUES(particular_value), particular_non_business=VALUES(particular_non_business), fonasa_value=VALUES(fonasa_value),
                fonasa_non_business=VALUES(fonasa_non_business), isapre_value=VALUES(isapre_value),
                isapre_non_business=VALUES(isapre_non_business), med_value=VALUES(med_value), pacakge_value=VALUES(pacakge_value),
                fonasa_code=VALUES(fonasa_code), category=VALUES(category), subcategory=VALUES(subcategory)";

            $insert = $wpdb->prepare($insert, row[0], row[1], row[2], row[3], row[4], row[5], row[6], row[7], row[8], row[9], row[10], row[11], row[12]);
            $insertReturns[] = $wpdb->query( $insert );
        }
        $wpdb->query( 'COMMIT;' );
        $wpdb->query( 'SET autocommit = 1;' );

        return $insertReturns;

    }