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use std::fs::read;
use std::io::ErrorKind as IOErrKind;
use std::path::PathBuf;
use protobuf::Message as _;
use crate::cmd::open_submaildir;
use crate::error::{Error, Result};
use crate::pb3::jwebmail::mimeheader::ContentDisposition::*;
use crate::pb3::jwebmail::{MIMEHeader, RawReq, RawResp};
use crate::rfc822::parse_mail_content;
pub fn raw(md_path: PathBuf, req: &[u8]) -> Result<Vec<u8>> {
let r = RawReq::parse_from_bytes(req)?;
let md = open_submaildir(md_path, &r.folder);
let mut mail = md.find(&r.mid).ok_or_else(|| {
std::io::Error::new(IOErrKind::NotFound, format!("mail {} not found", &r.mid))
})?;
match r.path.as_deref() {
Some("") | None => {
let mut mh = MIMEHeader::new();
mh.maintype = "message".to_owned();
mh.subtype = "rfc822".to_owned();
mh.file_name = Some(mail.id().to_owned());
mh.contentdispo = CONTENT_DISPOSITION_NONE.into();
let mut resp = RawResp::new();
resp.header = Some(mh).into();
resp.body = read(mail.path())?;
resp.write_to_bytes().map_err(|e| e.into())
}
Some(mime_path) => {
let path = mime_path
.split('.')
.map(|x| {
x.parse()
.map_err(|pe: std::num::ParseIntError| Error::PathError {
msg: pe.to_string(),
path: mime_path.to_owned(),
})
})
.collect::<Result<Vec<_>>>()?;
let mut m = mail.parsed()?;
if path[0] != 0 {
return Err(Error::PathError {
msg: "Message must be accessed by a 0".to_owned(),
path: mime_path.to_owned(),
});
}
for i in &path[1..] {
match &m.ctype.mimetype {
x if x.starts_with("message/") => {
if *i != 0 {
return Err(Error::PathError {
msg: "Message must be accessed by a 0".to_owned(),
path: mime_path.to_owned(),
});
}
let s: &'static _ = m.get_body_raw()?.leak();
m = mailparse::parse_mail(s)?;
}
x if x.starts_with("multipart/") => {
if *i >= m.subparts.len() {
return Err(Error::PathError {
msg: "Out of bounds access".to_owned(),
path: mime_path.to_owned(),
});
}
m = m.subparts.swap_remove(*i);
}
_ => {
return Err(Error::PathError {
msg: "Unable to descent into leaf component".to_owned(),
path: mime_path.to_owned(),
})
}
}
}
if m.ctype.mimetype.starts_with("multipart/") {
return Err(Error::PathError {
msg: "Can not show multipart component".to_owned(),
path: mime_path.to_owned(),
});
}
let mime_part = parse_mail_content(&m)?;
let content = if m.ctype.mimetype.starts_with("text/") {
m.get_body()?.into_bytes()
} else {
m.get_body_raw()?
};
let mut resp = RawResp::new();
resp.header = Some(mime_part).into();
resp.body = content;
resp.write_to_bytes().map_err(|e| e.into())
}
}
}
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