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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| use crate::bytes_serializable::BytesSerializable; | ||
| use crate::command::CommandPayload; | ||
| use crate::error::Error; | ||
| use crate::identifier::Identifier; | ||
| use crate::validatable::Validatable; | ||
| use serde::{Deserialize, Serialize}; | ||
| use std::fmt::Display; | ||
| use std::str::FromStr; | ||
|
|
||
| /// `PurgeStream` command is used to purge stream data (all the messages from its topics). | ||
| /// It has additional payload: | ||
| /// - `stream_id` - unique stream ID (numeric or name). | ||
| #[derive(Debug, Serialize, Deserialize, PartialEq, Default)] | ||
| pub struct PurgeStream { | ||
| /// Unique stream ID (numeric or name). | ||
| #[serde(skip)] | ||
| pub stream_id: Identifier, | ||
| } | ||
|
|
||
| impl CommandPayload for PurgeStream {} | ||
|
|
||
| impl Validatable<Error> for PurgeStream { | ||
| fn validate(&self) -> Result<(), Error> { | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| impl FromStr for PurgeStream { | ||
| type Err = Error; | ||
| fn from_str(input: &str) -> Result<Self, Self::Err> { | ||
| let parts = input.split('|').collect::<Vec<&str>>(); | ||
| if parts.len() != 1 { | ||
| return Err(Error::InvalidCommand); | ||
| } | ||
|
|
||
| let stream_id = parts[0].parse::<Identifier>()?; | ||
| let command = PurgeStream { stream_id }; | ||
| command.validate()?; | ||
| Ok(command) | ||
| } | ||
| } | ||
|
|
||
| impl BytesSerializable for PurgeStream { | ||
| fn as_bytes(&self) -> Vec<u8> { | ||
| let stream_id_bytes = self.stream_id.as_bytes(); | ||
| let mut bytes = Vec::with_capacity(stream_id_bytes.len()); | ||
| bytes.extend(stream_id_bytes); | ||
| bytes | ||
| } | ||
|
|
||
| fn from_bytes(bytes: &[u8]) -> Result<PurgeStream, Error> { | ||
| if bytes.len() < 5 { | ||
| return Err(Error::InvalidCommand); | ||
| } | ||
|
|
||
| let stream_id = Identifier::from_bytes(bytes)?; | ||
| let command = PurgeStream { stream_id }; | ||
| command.validate()?; | ||
| Ok(command) | ||
| } | ||
| } | ||
|
|
||
| impl Display for PurgeStream { | ||
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| write!(f, "{}", self.stream_id) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
|
|
||
| #[test] | ||
| fn should_be_serialized_as_bytes() { | ||
| let command = PurgeStream { | ||
| stream_id: Identifier::numeric(1).unwrap(), | ||
| }; | ||
|
|
||
| let bytes = command.as_bytes(); | ||
| let stream_id = Identifier::from_bytes(&bytes).unwrap(); | ||
|
|
||
| assert!(!bytes.is_empty()); | ||
| assert_eq!(stream_id, command.stream_id); | ||
| } | ||
|
|
||
| #[test] | ||
| fn should_be_deserialized_from_bytes() { | ||
| let stream_id = Identifier::numeric(1).unwrap(); | ||
| let bytes = stream_id.as_bytes(); | ||
| let command = PurgeStream::from_bytes(&bytes); | ||
| assert!(command.is_ok()); | ||
|
|
||
| let command = command.unwrap(); | ||
| assert_eq!(command.stream_id, stream_id); | ||
| } | ||
|
|
||
| #[test] | ||
| fn should_be_read_from_string() { | ||
| let stream_id = Identifier::numeric(1).unwrap(); | ||
| let input = format!("{stream_id}"); | ||
| let command = PurgeStream::from_str(&input); | ||
| assert!(command.is_ok()); | ||
|
|
||
| let command = command.unwrap(); | ||
| assert_eq!(command.stream_id, stream_id); | ||
| } | ||
| } |
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