use crate::base::{ErrorCode, HasErrorCode};
use crate::{
error, ErrorCodeReaderExt, ErrorCodeWriterExt, HasFixedCommandId,
IsRequest, IsResponse, IsValidResponseFor, MessageExt,
ReadFromPayload, Result, TryFromResponse, WithFixedPayloadLength,
WriteExt,
};
use snafu::ResultExt;
use std::io::{Read, Write};
#[derive(Clone, Debug, PartialEq)]
pub struct Request;
impl IsRequest for Request {
type Response = Response;
}
impl From<Request> for super::Request {
fn from(m: Request) -> Self {
super::Request::QueryDeviceManufacturer(m)
}
}
impl WithFixedPayloadLength for Request {
const FIXED_PAYLOAD_LENGTH: u16 = 0u16;
}
impl HasFixedCommandId for Request {
const COMMAND_ID: u16 = 0x0802;
}
impl MessageExt for Request {
fn payload_length(&self) -> u16 {
Self::FIXED_PAYLOAD_LENGTH
}
fn write_payload(&self, _w: &mut dyn Write) -> Result<()> {
Ok(())
}
}
impl ReadFromPayload for Request {
fn read_from_payload<R: Read>(
_r: &mut R,
payload_length: u16,
) -> Result<Self> {
Self::verify_payload_length(
payload_length,
"query_device_firmware_version_response",
)?;
Ok(Self {})
}
}
#[cfg(test)]
mod test_request {
use super::*;
#[test]
fn write_to() {
let mut buffer = Vec::new();
let options: u8 = 0x45;
let sequence: u8 = 0x93;
let message = Request {};
message.write_to(&mut buffer, options, sequence).unwrap();
assert_eq!(
buffer,
[
0x45,
0x93,
0x02,
0x08,
0x00,
0x00,
]
);
}
#[test]
fn read_from_payload() {
let buffer = vec![];
let len = buffer.len() as u16;
let message =
Request::read_from_payload(&mut buffer.as_slice(), len)
.unwrap();
assert_eq!(message, Request {});
}
}
#[derive(Clone, Debug, PartialEq)]
pub struct Response {
pub error: ErrorCode,
pub manufacturer: String,
}
impl IsResponse for Response {
type Request = Request;
}
impl IsValidResponseFor for Response {
fn is_valid_response_for(&self, _request: &Request) -> bool {
true
}
}
impl HasErrorCode for Response {
fn error_code(&self) -> ErrorCode {
self.error
}
}
impl TryFromResponse for Response {
fn try_from_response(r: super::Response) -> Result<Self> {
if let super::Response::QueryDeviceManufacturer(r) = r {
Ok(r)
} else {
error::UnexpectedResponseType.fail()?
}
}
}
impl From<Response> for super::Response {
fn from(m: Response) -> Self {
super::Response::QueryDeviceManufacturer(m)
}
}
impl HasFixedCommandId for Response {
const COMMAND_ID: u16 = 0x0803;
}
impl MessageExt for Response {
fn payload_length(&self) -> u16 {
ErrorCode::FIXED_PAYLOAD_LENGTH
+ self.manufacturer.as_bytes().len() as u16
}
fn write_payload(&self, w: &mut dyn Write) -> Result<()> {
w.write_error_code(self.error)?;
w.write_all_(self.manufacturer.as_bytes())?;
Ok(())
}
}
impl ReadFromPayload for Response {
fn read_from_payload<R: Read>(
r: &mut R,
payload_length: u16,
) -> Result<Self> {
let error = r.read_error_code()?;
let mut manufacturer = vec![
0u8;
(payload_length - ErrorCode::FIXED_PAYLOAD_LENGTH)
as usize
];
r.read_exact(&mut manufacturer).context(error::Io)?;
let manufacturer = String::from_utf8(manufacturer)
.context(error::Utf8Conversion)?;
Ok(Self {
error,
manufacturer,
})
}
}
#[cfg(test)]
mod test_response {
use super::*;
#[test]
fn write_to_empty() {
let mut buffer = vec![];
let options: u8 = 0x45;
let sequence: u8 = 0x93;
let error = ErrorCode::Success;
let manufacturer = "".to_string();
let message = Response {
error,
manufacturer,
};
message.write_to(&mut buffer, options, sequence).unwrap();
assert_eq!(
buffer,
vec![
0x45,
0x93,
0x03,
0x08,
0x02,
0x00,
0x00,
0x00,
]
);
}
#[test]
fn write_to_name() {
let mut buffer = Vec::new();
let options: u8 = 0x45;
let sequence: u8 = 0x93;
let error = ErrorCode::Success;
let manufacturer = "ACompany".to_string();
let message = Response {
error,
manufacturer,
};
message.write_to(&mut buffer, options, sequence).unwrap();
assert_eq!(
buffer,
vec![
0x45,
0x93,
0x03,
0x08,
0x0A,
0x00,
0x00,
0x00,
0x41,
0x43,
0x6F,
0x6D,
0x70,
0x61,
0x6E,
0x79,
]
);
}
#[test]
fn from_payload_empty() {
let buffer = vec![
0x00,
0x00,
];
let len = buffer.len() as u16;
let message =
Response::read_from_payload(&mut buffer.as_slice(), len)
.unwrap();
let error = ErrorCode::Success;
let manufacturer = "".to_string();
assert_eq!(
message,
Response {
error,
manufacturer,
}
);
}
#[test]
fn from_payload_name() {
let buffer = vec![
0x00,
0x00,
0x41,
0x43,
0x6F,
0x6D,
0x70,
0x61,
0x6E,
0x79,
];
let len = buffer.len() as u16;
let message =
Response::read_from_payload(&mut buffer.as_slice(), len)
.unwrap();
let error = ErrorCode::Success;
let manufacturer = "ACompany".to_string();
assert_eq!(
message,
Response {
error,
manufacturer,
}
);
}
}