const NULL_CHAR: &'static str = "\0";

#[derive(Debug)]
pub struct HTTPBody {
    data: json::JsonValue,
}

/// HTTPBody represents an HTTP request body
/// for simplicity, only json body is allowed
impl HTTPBody {
    fn new(data: json::JsonValue) -> HTTPBody {
        HTTPBody { data }
    }

    pub fn get_data(&self) -> &json::JsonValue {
        &self.data
    }
}

impl TryFrom<&str> for HTTPBody {
    type Error = String;
    fn try_from(body: &str) -> Result<HTTPBody, Self::Error> {
        let body = body.replace(NULL_CHAR, "");
        match json::parse(&body) {
            Ok(v) => Ok(HTTPBody::new(v)),
            Err(e) => Err(format!("during request body parsing details={}", e)),
        }
    }
}

#[test]
fn test_from_str() {
    let test_cases: [(&str, bool); 2] = [
        (r#"{"access_token":"toto","refresh_token":"tutu"}"#, true),
        ("", false),
    ];

    for (value, is_valid) in test_cases {
        let res = HTTPBody::try_from(value);
        if is_valid {
            assert!(res.is_ok());
            continue;
        }
        assert!(res.is_err());
    }
}