use crate::base::{ErrorCode, HasErrorCode};
use snafu::ResultExt;
use std::io::{Read, Write};
use uuid::{Bytes, Uuid};
use crate::{
error, ErrorCodeReaderExt, ErrorCodeWriterExt, HasFixedCommandId,
IsRequest, IsResponse, IsValidResponseFor, MessageExt,
ReadFromPayload, Result, TryFromResponse, WithFixedPayloadLength,
WriteExt,
};
#[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::QueryDeviceUuid(m)
}
}
impl WithFixedPayloadLength for Request {
const FIXED_PAYLOAD_LENGTH: u16 = 0u16;
}
impl HasFixedCommandId for Request {
const COMMAND_ID: u16 = 0x0804;
}
impl MessageExt for Request {
fn payload_length(&self) -> u16 {
Self::FIXED_PAYLOAD_LENGTH
}
fn write_payload(&self, _w: &mut 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_uuid_request",
)?;
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,
0x04,
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 uuid: Uuid,
}
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::QueryDeviceUuid(r) = r {
Ok(r)
} else {
error::UnexpectedResponseType.fail()?
}
}
}
impl From<Response> for super::Response {
fn from(m: Response) -> Self {
super::Response::QueryDeviceUuid(m)
}
}
impl WithFixedPayloadLength for Response {
const FIXED_PAYLOAD_LENGTH: u16 =
ErrorCode::FIXED_PAYLOAD_LENGTH + Uuid::FIXED_PAYLOAD_LENGTH;
}
impl HasFixedCommandId for Response {
const COMMAND_ID: u16 = 0x0805;
}
impl MessageExt for Response {
fn payload_length(&self) -> u16 {
Self::FIXED_PAYLOAD_LENGTH
}
fn write_payload(&self, w: &mut Write) -> Result<()> {
w.write_error_code(self.error)?;
w.write_all_(self.uuid.as_bytes())?;
Ok(())
}
}
impl ReadFromPayload for Response {
fn read_from_payload<R: Read>(
r: &mut R,
payload_length: u16,
) -> Result<Self> {
Self::verify_payload_length(
payload_length,
"query_device_uuid_response",
)?;
let error = r.read_error_code()?;
let mut bytes: Bytes = [0u8; 16];
r.read_exact(&mut bytes).context(error::Io)?;
let uuid = Uuid::from_bytes(bytes);
Ok(Self { error, uuid })
}
}
#[cfg(test)]
mod test_response {
use super::*;
#[test]
fn write_to() {
let mut buffer = Vec::new();
let options: u8 = 0x45;
let sequence: u8 = 0x93;
let uuid = Uuid::parse_str("ad84895b-7872-42f6-97ff-e4920cbe86d5")
.unwrap();
let message = Response {
error: ErrorCode::InvalidState,
uuid,
};
message.write_to(&mut buffer, options, sequence).unwrap();
assert_eq!(
buffer,
[
0x45,
0x93,
0x05,
0x08,
0x12,
0x00,
0x07,
0x01,
0xAD,
0x84,
0x89,
0x5b,
0x78,
0x72,
0x42,
0xF6,
0x97,
0xFF,
0xE4,
0x92,
0x0C,
0xBE,
0x86,
0xD5,
]
);
}
#[test]
fn read_from_payload() {
let buffer = vec![
0x07,
0x01,
0xAD,
0x84,
0x89,
0x5b,
0x78,
0x72,
0x42,
0xF6,
0x97,
0xFF,
0xE4,
0x92,
0x0C,
0xBE,
0x86,
0xD5,
];
let uuid = Uuid::parse_str("ad84895b-7872-42f6-97ff-e4920cbe86d5")
.unwrap();
let len = buffer.len() as u16;
let message =
Response::read_from_payload(&mut buffer.as_slice(), len)
.unwrap();
assert_eq!(
message,
Response {
error: ErrorCode::InvalidState,
uuid,
}
);
}
}