go train delay rust api json body validation

go_train_delay_rust_api_json_validator.rs

pub fn new(q: &str) -> Result<Self, AppError> {
    // get the input search string
    let raw_query: SearchRawQuery = serde_json::from_str(q)?;
    let mut query_keys_validation_list: Vec<&Option<Vec<Value>>> = vec![];

    // check if have must keyword
    if let Some(must) = &raw_query.query.must {
        query_keys_validation_list.extend_from_slice(&[
          &must.ranges,
         ]);
    }

    // all valid then pass the key validation
    let is_valid_query = query_keys_validation_list
        .par_iter()
        .all(|item| SearchRawQuery::has_valid_keys(item));

    // if the query is invalid return error
    if !is_valid_query {
        return Err(AppError {
            message: Some(format!("query string is invalid: {:?}", q.to_string())),
            cause: Some("invalid query string".to_string()),
            error_type: AppErrorType::SearchError,
        });
    }

    Ok(raw_query)
}