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use thin_edge_json::event::ThinEdgeEvent;
use time::{format_description::well_known::Rfc3339, OffsetDateTime};
use crate::error::SmartRestSerializerError;
const CREATE_EVENT_SMARTREST_CODE: u16 = 400;
/// Converts from thin-edge event to C8Y event SmartREST message
pub fn serialize_event(event: ThinEdgeEvent) -> Result<String, SmartRestSerializerError> {
let current_timestamp = OffsetDateTime::now_utc();
match event.data {
None => Ok(format!(
"{CREATE_EVENT_SMARTREST_CODE},{},{},{}",
event.name,
event.name,
current_timestamp.format(&Rfc3339)?
)),
Some(event_data) => {
let smartrest_message = format!(
"{CREATE_EVENT_SMARTREST_CODE},{},\"{}\",{}",
event.name.clone(),
event_data.text.unwrap_or(event.name),
event_data.time.map_or_else(
|| current_timestamp.format(&Rfc3339),
|timestamp| timestamp.format(&Rfc3339)
)?
);
Ok(smartrest_message)
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use anyhow::Result;
use assert_matches::assert_matches;
use serde::Deserialize;
use test_case::test_case;
use thin_edge_json::event::ThinEdgeEventData;
use time::macros::datetime;
#[test_case(
ThinEdgeEvent {
name: "click_event".into(),
data: Some(ThinEdgeEventData {
text: Some("Someone clicked".into()),
time: Some(datetime!(2021-04-23 19:00:00 +05:00)),
}),
},
"400,click_event,\"Someone clicked\",2021-04-23T19:00:00+05:00"
;"event translation"
)]
#[test_case(
ThinEdgeEvent {
name: "click_event".into(),
data: Some(ThinEdgeEventData {
text: None,
time: Some(datetime!(2021-04-23 19:00:00 +05:00)),
}),
},
"400,click_event,\"click_event\",2021-04-23T19:00:00+05:00"
;"event translation without message"
)]
#[test_case(
ThinEdgeEvent {
name: "click_event".into(),
data: Some(ThinEdgeEventData {
text: Some("Someone, clicked, it".into()),
time: Some(datetime!(2021-04-23 19:00:00 +05:00)),
}),
},
"400,click_event,\"Someone, clicked, it\",2021-04-23T19:00:00+05:00"
;"event translation with commas in message"
)]
fn check_event_translation(event: ThinEdgeEvent, expected_smartrest_msg: &str) {
let result = serialize_event(event);
assert_eq!(result.unwrap(), expected_smartrest_msg);
}
#[derive(Debug, Deserialize)]
struct SmartRestEvent {
pub code: i32,
pub name: String,
pub message: Option<String>,
pub time: Option<String>,
}
#[test]
fn event_translation_empty_json_payload_generates_timestamp() -> Result<()> {
let event = ThinEdgeEvent {
name: "empty_event".into(),
data: Some(ThinEdgeEventData {
text: None,
time: None,
}),
};
let smartrest_message = serialize_event(event)?;
let mut reader = csv::ReaderBuilder::new()
.has_headers(false)
.from_reader(smartrest_message.as_bytes());
let mut iter = reader.deserialize();
let result = iter.next();
assert!(result.is_some());
let smartrest_event: SmartRestEvent = result.expect("One entry expected")?;
assert_eq!(smartrest_event.code, 400);
assert_eq!(smartrest_event.name, "empty_event".to_string());
assert_eq!(smartrest_event.message, Some("empty_event".to_string()));
assert_matches!(smartrest_event.time, Some(_));
Ok(())
}
#[test]
fn event_translation_empty_payload() -> Result<()> {
let event = ThinEdgeEvent {
name: "empty_event".into(),
data: None,
};
let smartrest_message = serialize_event(event)?;
let mut reader = csv::ReaderBuilder::new()
.has_headers(false)
.from_reader(smartrest_message.as_bytes());
let mut iter = reader.deserialize();
let result = iter.next();
assert!(result.is_some());
let smartrest_event: SmartRestEvent = result.expect("One entry expected")?;
assert_eq!(smartrest_event.code, 400);
assert_eq!(smartrest_event.name, "empty_event".to_string());
assert_eq!(smartrest_event.message, Some("empty_event".to_string()));
assert_matches!(smartrest_event.time, Some(_));
Ok(())
}
}
|
