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use std::borrow::Cow;
use std::future::Future;
use quick_xml::events::{Event, BytesStart, BytesDecl, BytesText};
use quick_xml::events::attributes::AttrError;
use quick_xml::name::{Namespace, QName, PrefixDeclaration, ResolveResult, ResolveResult::*};
use quick_xml::reader::NsReader;
use tokio::io::AsyncBufRead;
use super::types::*;
use super::error::ParsingError;
use super::xml::{QRead, Reader, IRead, DAV_URN, CAL_URN};
impl<E: Extension> QRead<PropFind<E>> for PropFind<E> {
async fn qread(xml: &mut Reader<impl IRead>) -> Result<Option<Self>, ParsingError> {
// Find propfind
xml.tag_start(DAV_URN, "propfind").await?;
// Find any tag
let propfind: PropFind<E> = loop {
match xml.peek() {
Event::Start(_) if xml.is_tag(DAV_URN, "allprop") => {
xml.tag_start(DAV_URN, "allprop").await?;
let r = PropFind::AllProp(Include::qread(xml).await?);
xml.tag_stop(DAV_URN, "allprop").await?;
break r
},
Event::Start(_) if xml.is_tag(DAV_URN, "prop") => {
let propname = PropName::qread(xml).await?.ok_or(ParsingError::MissingChild)?;
break PropFind::Prop(propname);
},
Event::Empty(_) if xml.is_tag(DAV_URN, "allprop") => {
xml.next().await?;
break PropFind::AllProp(None)
},
Event::Empty(_) if xml.is_tag(DAV_URN, "propname") => {
xml.next().await?;
break PropFind::PropName
},
_ => { xml.skip().await?; },
}
};
// Close tag
xml.tag_stop(DAV_URN, "propfind").await?;
Ok(Some(propfind))
}
}
impl<E: Extension> QRead<Include<E>> for Include<E> {
async fn qread(xml: &mut Reader<impl IRead>) -> Result<Option<Self>, ParsingError> {
xml.tag_start(DAV_URN, "include").await?;
let mut acc: Vec<PropertyRequest<E>> = Vec::new();
loop {
match xml.peek() {
Event::Start(_) | Event::Empty(_) => {
PropertyRequest::qread(xml).await?.map(|v| acc.push(v));
},
Event::End(_) if xml.is_tag(DAV_URN, "include") => break,
_ => { xml.skip().await?; },
}
}
xml.tag_stop(DAV_URN, "include").await?;
Ok(Some(Include(acc)))
}
}
impl<E: Extension> QRead<PropName<E>> for PropName<E> {
async fn qread(xml: &mut Reader<impl IRead>) -> Result<Option<Self>, ParsingError> {
xml.tag_start(DAV_URN, "prop").await?;
let mut acc: Vec<PropertyRequest<E>> = Vec::new();
loop {
match xml.peek() {
Event::Start(_) | Event::Empty(_) => {
PropertyRequest::qread(xml).await?.map(|v| acc.push(v));
},
Event::End(_) if xml.is_tag(DAV_URN, "prop") => break,
_ => { xml.skip().await?; },
}
}
xml.tag_stop(DAV_URN, "prop").await?;
Ok(Some(PropName(acc)))
}
}
impl<E: Extension> QRead<PropertyRequest<E>> for PropertyRequest<E> {
async fn qread(xml: &mut Reader<impl IRead>) -> Result<Option<Self>, ParsingError> {
loop {
let bs = match xml.peek() {
Event::Start(b) | Event::Empty(b) => b,
_ => {
xml.skip().await?;
continue
},
};
let mut maybe_res = None;
// Option 1: a pure DAV property
let (ns, loc) = xml.rdr.resolve_element(bs.name());
if matches!(ns, Bound(Namespace(ns)) if ns == DAV_URN) {
maybe_res = match loc.into_inner() {
b"creationdate" => Some(PropertyRequest::CreationDate),
b"displayname" => Some(PropertyRequest::DisplayName),
b"getcontentlanguage" => Some(PropertyRequest::GetContentLanguage),
b"getcontentlength" => Some(PropertyRequest::GetContentLength),
b"getcontenttype" => Some(PropertyRequest::GetContentType),
b"getetag" => Some(PropertyRequest::GetEtag),
b"getlastmodified" => Some(PropertyRequest::GetLastModified),
b"lockdiscovery" => Some(PropertyRequest::LockDiscovery),
b"resourcetype" => Some(PropertyRequest::ResourceType),
b"supportedlock" => Some(PropertyRequest::SupportedLock),
_ => None,
};
}
// Option 2: an extension property
if maybe_res.is_none() {
maybe_res = E::PropertyRequest::qread(xml).await?.map(PropertyRequest::Extension);
}
// Close the current tag
xml.skip().await?;
return Ok(maybe_res)
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::dav::realization::Core;
#[tokio::test]
async fn basic_propfind_propname() {
let src = r#"<?xml version="1.0" encoding="utf-8" ?>
<rando/>
<garbage><old/></garbage>
<D:propfind xmlns:D="DAV:">
<D:propname/>
</D:propfind>
"#;
let mut rdr = Reader::new(NsReader::from_reader(src.as_bytes())).await.unwrap();
let got = PropFind::<Core>::qread(&mut rdr).await.unwrap().unwrap();
assert_eq!(got, PropFind::<Core>::PropName);
}
#[tokio::test]
async fn basic_propfind_prop() {
let src = r#"<?xml version="1.0" encoding="utf-8" ?>
<rando/>
<garbage><old/></garbage>
<D:propfind xmlns:D="DAV:">
<D:prop>
<D:displayname/>
<D:getcontentlength/>
<D:getcontenttype/>
<D:getetag/>
<D:getlastmodified/>
<D:resourcetype/>
<D:supportedlock/>
</D:prop>
</D:propfind>
"#;
let mut rdr = Reader::new(NsReader::from_reader(src.as_bytes())).await.unwrap();
let got = PropFind::<Core>::qread(&mut rdr).await.unwrap().unwrap();
assert_eq!(got, PropFind::Prop(PropName(vec![
PropertyRequest::DisplayName,
PropertyRequest::GetContentLength,
PropertyRequest::GetContentType,
PropertyRequest::GetEtag,
PropertyRequest::GetLastModified,
PropertyRequest::ResourceType,
PropertyRequest::SupportedLock,
])));
}
}
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