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use std::{collections::HashSet, str::FromStr};
use futures::Sink;
use tokio::io::AsyncWrite;
use crate::{
element::{Element, Name, NamespaceDeclaration},
error::Error,
xml::{self, composers::Composer, parsers_complete::Parser, ETag},
Result,
};
// pub struct Writer<W, C = Composer> {
pub struct Writer<W> {
inner: W,
depth: Vec<Name>,
namespace_declarations: Vec<HashSet<NamespaceDeclaration>>,
}
impl<W: AsyncWrite + Unpin> Writer<W> {
pub async fn write(&mut self, element: Element) -> Result<()> {
todo!()
}
pub async fn write_start(&mut self, element: Element) -> Result<()> {
let namespace_declarations_stack: Vec<_> = self
.namespace_declarations
.iter()
.flatten()
.chain(&element.namespace_declarations)
.collect();
let prefix;
if let Some(namespace) = &element.name.namespace {
let name_namespace_declaration = namespace_declarations_stack
.iter()
.rfind(|namespace_declaration| namespace_declaration.namespace == *namespace)
.ok_or(Error::UndeclaredNamespace(namespace.clone()))?;
prefix = name_namespace_declaration.prefix.as_ref();
} else {
prefix = None
}
let name;
if let Some(prefix) = &prefix {
name = xml::QName::PrefixedName(xml::PrefixedName {
prefix: xml::Prefix::parse_full(prefix)?,
local_part: xml::LocalPart::parse_full(&element.name.local_name)?,
})
} else {
name = xml::QName::UnprefixedName(xml::UnprefixedName::parse_full(
&element.name.local_name,
)?)
}
let mut attributes = Vec::new();
for namespace_declaration in &element.namespace_declarations {
let ns_name = namespace_declaration
.prefix
.as_ref()
.map(|prefix| -> Result<_> {
Ok(xml::NSAttName::PrefixedAttName(
xml::PrefixedAttName::parse_full(&prefix)?,
))
})
.unwrap_or(Ok(xml::NSAttName::DefaultAttName))?;
let value = xml::AttValue::from(namespace_declaration.namespace.as_str());
let xml_attribute = xml::Attribute::NamespaceDeclaration { ns_name, value };
attributes.push(xml_attribute);
}
for (name, value) in &element.attributes {
let prefix;
if let Some(namespace) = &name.namespace {
let name_namespace_declaration = namespace_declarations_stack
.iter()
.rfind(|namespace_declaration| namespace_declaration.namespace == *namespace)
.ok_or(Error::UndeclaredNamespace(namespace.clone()))?;
prefix = name_namespace_declaration.prefix.as_ref();
} else {
prefix = None
}
let att_name;
if let Some(prefix) = &prefix {
att_name = xml::QName::PrefixedName(xml::PrefixedName {
prefix: xml::Prefix::parse_full(prefix)?,
local_part: xml::LocalPart::parse_full(&element.name.local_name)?,
})
} else {
att_name = xml::QName::UnprefixedName(xml::UnprefixedName::parse_full(
&element.name.local_name,
)?)
}
let value = xml::AttValue::from(value.as_str());
let xml_attribute = xml::Attribute::Attribute {
name: att_name,
value,
};
attributes.push(xml_attribute);
}
let s_tag = xml::STag { name, attributes };
s_tag.write(&mut self.inner).await?;
self.depth.push(element.name);
self.namespace_declarations
.push(element.namespace_declarations);
Ok(())
}
pub async fn write_end(&mut self) -> Result<()> {
if let Some(name) = &self.depth.pop() {
let e_tag;
let namespace_declarations_stack: Vec<_> =
self.namespace_declarations.iter().flatten().collect();
let prefix;
if let Some(namespace) = &name.namespace {
let name_namespace_declaration = namespace_declarations_stack
.iter()
.rfind(|namespace_declaration| namespace_declaration.namespace == *namespace)
.ok_or(Error::UndeclaredNamespace(namespace.clone()))?;
prefix = name_namespace_declaration.prefix.as_ref();
} else {
prefix = None
}
if let Some(prefix) = &prefix {
e_tag = xml::ETag {
name: xml::QName::PrefixedName(xml::PrefixedName {
prefix: xml::Prefix::parse_full(prefix)?,
local_part: xml::LocalPart::parse_full(&name.local_name)?,
}),
};
} else {
e_tag = xml::ETag {
name: xml::QName::UnprefixedName(xml::UnprefixedName::parse_full(
&name.local_name,
)?),
};
}
e_tag.write(&mut self.inner).await?;
self.namespace_declarations.pop();
Ok(())
} else {
return Err(Error::NotInElement("".to_string()));
}
}
}
impl<W: AsyncWrite, E: Into<Element>> Sink<E> for Writer<W> {
type Error = Error;
fn poll_ready(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Result<()>> {
todo!()
}
fn start_send(self: std::pin::Pin<&mut Self>, item: E) -> Result<()> {
todo!()
}
fn poll_flush(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Result<()>> {
todo!()
}
fn poll_close(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Result<()>> {
todo!()
}
}
|
