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use agent_interface::{error::*, topic::ResponseTopic};
use mqtt_client::{MqttClientError, Topic};
use std::convert::{TryFrom, TryInto};
#[derive(Debug, Clone, PartialEq)]
pub enum C8yTopic {
SmartRestRequest,
SmartRestResponse,
OperationTopic(String),
}
impl C8yTopic {
pub fn as_str(&self) -> &str {
match self {
Self::SmartRestRequest => r#"c8y/s/ds"#,
Self::SmartRestResponse => r#"c8y/s/us"#,
Self::OperationTopic(name) => name.as_str(),
}
}
pub fn to_topic(&self) -> Result<Topic, MqttClientError> {
Ok(Topic::new(self.as_str())?)
}
}
impl TryFrom<String> for C8yTopic {
type Error = TopicError;
fn try_from(value: String) -> Result<Self, Self::Error> {
match value.as_str() {
r#"c8y/s/ds"# => Ok(C8yTopic::SmartRestRequest),
r#"c8y/s/us"# => Ok(C8yTopic::SmartRestResponse),
topic_name => {
if topic_name[..3].contains("c8y") {
Ok(C8yTopic::OperationTopic(topic_name.to_string()))
} else {
Err(TopicError::UnknownTopic {
topic: topic_name.to_string(),
})
}
}
}
}
}
impl TryFrom<&str> for C8yTopic {
type Error = TopicError;
fn try_from(value: &str) -> Result<Self, Self::Error> {
Self::try_from(value.to_string())
}
}
impl TryFrom<Topic> for C8yTopic {
type Error = TopicError;
fn try_from(value: Topic) -> Result<Self, Self::Error> {
value.name.try_into()
}
}
#[derive(Debug, Clone, PartialEq)]
pub enum MapperSubscribeTopic {
C8yTopic(C8yTopic),
ResponseTopic(ResponseTopic),
}
impl TryFrom<String> for MapperSubscribeTopic {
type Error = TopicError;
fn try_from(value: String) -> Result<Self, Self::Error> {
match ResponseTopic::try_from(value.clone()) {
Ok(response_topic) => Ok(MapperSubscribeTopic::ResponseTopic(response_topic)),
Err(_) => match C8yTopic::try_from(value) {
Ok(smart_rest_request) => Ok(MapperSubscribeTopic::C8yTopic(smart_rest_request)),
Err(err) => Err(err),
},
}
}
}
impl TryFrom<&str> for MapperSubscribeTopic {
type Error = TopicError;
fn try_from(value: &str) -> Result<Self, Self::Error> {
Self::try_from(value.to_string())
}
}
impl TryFrom<Topic> for MapperSubscribeTopic {
type Error = TopicError;
fn try_from(value: Topic) -> Result<Self, Self::Error> {
value.name.try_into()
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::convert::TryInto;
#[test]
fn convert_c8y_topic_to_str() {
assert_eq!(C8yTopic::SmartRestRequest.as_str(), "c8y/s/ds");
assert_eq!(C8yTopic::SmartRestResponse.as_str(), "c8y/s/us");
}
#[test]
fn convert_str_into_c8y_topic() {
let c8y_req: C8yTopic = "c8y/s/ds".try_into().unwrap();
assert_eq!(c8y_req, C8yTopic::SmartRestRequest);
let c8y_resp: C8yTopic = "c8y/s/us".try_into().unwrap();
assert_eq!(c8y_resp, C8yTopic::SmartRestResponse);
let error: Result<C8yTopic, TopicError> = "test".try_into();
assert!(error.is_err());
}
#[test]
fn convert_topic_into_c8y_topic() {
let c8y_req: C8yTopic = Topic::new("c8y/s/ds").unwrap().try_into().unwrap();
assert_eq!(c8y_req, C8yTopic::SmartRestRequest);
let c8y_resp: C8yTopic = Topic::new("c8y/s/us").unwrap().try_into().unwrap();
assert_eq!(c8y_resp, C8yTopic::SmartRestResponse);
let error: Result<C8yTopic, TopicError> = Topic::new("test").unwrap().try_into();
assert!(error.is_err());
}
}
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