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use super::{headermap::HeaderMap, status::Status};
use anyhow::{anyhow, bail, Context};
use std::{fmt::Display, str::FromStr};
#[derive(Debug, Clone)]
pub struct Response {
pub status: Status,
pub headers: HeaderMap,
}
impl FromStr for Response {
type Err = anyhow::Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut lines = s.lines();
let statusline = lines.next().ok_or(anyhow!("status line missing"))?;
let (sipver, rest) = statusline
.split_once(" ")
.ok_or(anyhow!("status line malformed"))?;
let (code, _status_str) = rest
.split_once(" ")
.ok_or(anyhow!("status line malformed"))?;
let code = u16::from_str(code).context("status code")?;
let Some(ver) = sipver.strip_prefix("SIP/") else {
bail!("sip version malformed");
};
if ver != "2.0" {
bail!("sip version {ver:?} is not supported");
}
let headers = HeaderMap::parse(&mut lines)?;
let status = Status::from_code(code);
Ok(Self { status, headers })
}
}
impl Display for Response {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let Self { status, headers } = self;
write!(f, "SIP/2.0 {} {status:?}\r\n", status.to_code())?;
write!(f, "{headers}\r\n")?;
Ok(())
}
}
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