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use std::vec::Vec;
use failure::Error;
use crate::{Deserialize, DeserializeUTF8};
use crate::{Serialize, SerializeUTF8};
/// The BufferInfo struct represents a BufferInfo as received in IRC
///
/// BufferInfo is, like all other struct based types, serialized sequentially.
#[derive(Clone, Debug, std::cmp::PartialEq)]
pub struct BufferInfo {
/// a unique, sequential id for the buffer
pub id: i32,
/// NetworkId of the network the buffer belongs to
pub network_id: i32,
/// The Type of the Buffer
pub buffer_type: BufferType,
/// BufferName as displayed to the user
pub name: String,
}
impl Serialize for BufferInfo {
fn serialize(&self) -> Result<Vec<u8>, Error> {
let mut values: Vec<u8> = Vec::new();
values.append(&mut i32::serialize(&self.id)?);
values.append(&mut i32::serialize(&self.network_id)?);
values.append(&mut i16::serialize(&(self.buffer_type as i16))?);
values.append(&mut vec![0, 0, 0, 0]);
values.append(&mut String::serialize_utf8(&self.name)?);
Ok(values)
}
}
impl Deserialize for BufferInfo {
fn parse(b: &[u8]) -> Result<(usize, Self), Error> {
let (_, id) = i32::parse(&b[0..4])?;
let (_, network_id) = i32::parse(&b[4..8])?;
let (_, buffer_type) = i16::parse(&b[8..10])?;
// There are 4 additional undocumented Bytes in the BufferInfo
// so we start at byte 14
let (size, name) = String::parse_utf8(&b[14..])?;
return Ok((
14 + size,
Self {
id,
network_id,
buffer_type: BufferType::from(buffer_type),
name,
},
));
}
}
/// The Type of the Buffer
#[repr(i16)]
#[derive(Copy, Clone, Debug, std::cmp::PartialEq)]
pub enum BufferType {
Status = 0x01,
Channel = 0x02,
Query = 0x04,
Group = 0x08,
}
impl From<i16> for BufferType {
fn from(value: i16) -> Self {
match value {
0x01 => return Self::Status,
0x02 => return Self::Channel,
0x04 => return Self::Query,
0x08 => return Self::Group,
_ => unimplemented!(),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn bufferinfo_serialize() {
let buffer = BufferInfo {
id: 1,
network_id: 1,
buffer_type: BufferType::Channel,
name: "#test".to_string(),
};
assert_eq!(
buffer.serialize().unwrap(),
[0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 5, 35, 116, 101, 115, 116]
)
}
#[test]
fn bufferinfo_deserialize() {
let buffer = BufferInfo {
id: 1,
network_id: 1,
buffer_type: BufferType::Channel,
name: "#test".to_string(),
};
let bytes = vec![
0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 5, 35, 116, 101, 115, 116,
];
assert_eq!(BufferInfo::parse(&bytes).unwrap(), (23, buffer))
}
}
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