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use std::str::FromStr;
use crate::{version::Version, method::Method, uri::URI, header::{HeaderMap, Header}, error::HTTPError, parse::TryParse};
pub struct Request<T: ToString + FromStr> {
pub method: Method,
pub uri: URI,
pub version: Version,
pub headers: HeaderMap,
pub body: Option<T>
}
impl<T: ToString + FromStr> TryParse for Request<T> {
fn try_parse(s: impl Into<String>) -> Result<Self, HTTPError> {
let s = s.into();
let mut lines = s.lines();
let Some(head) = lines.next() else {
return Err(HTTPError::MissingHeader)
};
let mut head_parts = head.split_whitespace();
let err = HTTPError::InvalidHeader(s.clone());
let Some(method_str) = head_parts.next() else { return Err(err) };
let method = method_str.into();
let Some(uri_str) = head_parts.next() else { return Err(err) };
let uri = uri_str.try_into()?;
let Some(version_str) = head_parts.next() else { return Err(err) };
let version = version_str.into();
let mut headers = HeaderMap::new();
loop {
let Some(next) = lines.next() else {
return Err(HTTPError::MissingHeaderBreak)
};
if next.len() < 1 { break }
let header = Header::try_parse(next)?;
headers.insert(header);
}
let rest: String = lines.collect();
let body;
if rest.len() < 1 {
body = None
} else {
body = match T::from_str(&rest) {
Ok(body) => Some(body),
Err(_) => return Err(HTTPError::InvalidBody)
}
}
Ok(Self { method, uri, version, headers, body })
}
}
impl<T: ToString + FromStr> ToString for Request<T> {
fn to_string(&self) -> String {
let mut s = String::new();
s.push_str(&self.method.as_str());
s.push(' ');
s.push_str(&self.uri.to_string());
s.push(' ');
s.push_str(self.version.as_str());
s.push_str("\r\n");
let iter = self.headers.iter();
for headers in iter {
for header in headers {
s.push_str(header.name.as_str());
s.push_str(": ");
s.push_str(header.value.as_str());
s.push_str("\r\n");
}
}
s.push_str("\r\n");
if let Some(body) = &self.body {
s.push_str(&body.to_string());
}
s
}
}
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