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use markup5ever::{local_name, namespace_url, ns};
use quote::quote;
use syn::parse2;
use yarte_hir::{Each as HEach, IfElse as HIfElse, Struct, HIR};
use yarte_html::{
interface::{QualName, YName},
serializer::SerializerOpt,
utils::MARK,
y_name,
};
use crate::{
serialize::serialize,
sink::{parse_document, parse_fragment, ParseAttribute, ParseElement, ParseResult, Sink},
};
pub struct DOMFmt(pub Vec<HIR>);
impl From<Vec<HIR>> for DOMFmt {
fn from(ir: Vec<HIR>) -> Self {
DOMFmt(to_domfmt_init(ir).expect("correct html"))
}
}
const HASH: &str = "0x00000000";
fn get_html(ir: &[HIR]) -> String {
let mut html = String::new();
for x in ir {
match x {
HIR::Lit(x) => html.push_str(x),
_ => {
html.push_str(MARK);
html.push_str(HASH);
}
}
}
html
}
pub fn to_wasmfmt(mut ir: Vec<HIR>, s: &Struct) -> ParseResult<Vec<HIR>> {
let html = get_html(&ir);
let sink = match parse_document(&html) {
Ok(mut sink) => {
add_scripts(s, &mut sink, &mut ir);
sink
}
Err(_) => parse_fragment(&html)?,
};
serialize_domfmt(sink, ir, SerializerOpt { wasm: true })
}
fn add_scripts(s: &Struct, sink: &mut Sink, ir: &mut Vec<HIR>) {
let mut body: Option<usize> = None;
use ParseElement::*;
match sink.nodes.values().next() {
Some(Document(children)) => {
if let Some(Node { name, children, .. }) = sink.nodes.get(&children[0]) {
if let y_name!("html") = name.local {
for i in children {
if let Some(Node { name, .. }) = sink.nodes.get(i) {
if let y_name!("body") = name.local {
body = Some(*i);
}
}
}
}
}
}
_ => panic!("Need <!doctype html>"),
}
let mut last = *sink.nodes.keys().last().unwrap() + 1;
let get_state = format!(
"function get_state(){{return JSON.stringify({}{});}}",
MARK, HASH
);
ir.push(HIR::Safe(Box::new(
parse2(quote!(
yarte::serde_json::to_string(&self).map_err(|_| yarte::Error)?
))
.unwrap(),
)));
let state = Node {
name: QualName {
prefix: None,
ns: ns!(html),
local: y_name!("script"),
},
attrs: vec![],
children: vec![last],
parent: None,
};
sink.nodes.insert(last, Text(get_state));
last += 1;
sink.nodes.insert(last, state);
let state = last;
last += 1;
let init_s = format!(
"import init from '{}';async function run(){{await init()}}run()",
s.script.as_ref().expect("Need `script` attribute")
);
let init = Node {
name: QualName {
prefix: None,
ns: ns!(html),
local: y_name!("script"),
},
attrs: vec![ParseAttribute {
name: QualName {
prefix: None,
ns: ns!(),
local: y_name!("type"),
},
value: "module".to_string(),
}],
children: vec![last],
parent: None,
};
sink.nodes.insert(last, Text(init_s));
last += 1;
sink.nodes.insert(last, init);
match sink.nodes.get_mut(&body.expect("body defined")).unwrap() {
Node { children, .. } => {
children.push(state);
children.push(last);
}
_ => unreachable!(),
}
}
fn to_domfmt_init(ir: Vec<HIR>) -> ParseResult<Vec<HIR>> {
let html = get_html(&ir);
let sink = match parse_document(&html) {
Ok(a) => a,
Err(_) => parse_fragment(&html)?,
};
serialize_domfmt(sink, ir, Default::default())
}
fn to_domfmt(ir: Vec<HIR>, opts: SerializerOpt) -> ParseResult<Vec<HIR>> {
let html = get_html(&ir);
serialize_domfmt(parse_fragment(&html)?, ir, opts)
}
fn serialize_domfmt(sink: Sink, mut ir: Vec<HIR>, opts: SerializerOpt) -> ParseResult<Vec<HIR>> {
let mut writer = Vec::new();
serialize(&mut writer, sink.into(), opts).expect("some serialize node");
let html = String::from_utf8(writer).expect("");
let mut chunks = html.split(MARK).peekable();
if let Some(first) = chunks.peek() {
if first.is_empty() {
chunks.next();
}
}
let mut ir = ir.drain(..).filter(|x| match x {
HIR::Lit(_) => false,
_ => true,
});
let mut buff = vec![];
for chunk in chunks {
if chunk.is_empty() {
panic!("chunk empty")
} else if chunk.starts_with(HASH) {
resolve_node(ir.next().expect("Some HIR expression"), &mut buff, opts)?;
let cut = &chunk[HASH.len()..];
if !cut.is_empty() {
buff.push(HIR::Lit(cut.into()));
}
} else {
buff.push(HIR::Lit(chunk.into()));
}
}
assert!(ir.next().is_none());
Ok(buff)
}
fn resolve_node(ir: HIR, buff: &mut Vec<HIR>, opts: SerializerOpt) -> ParseResult<()> {
match ir {
HIR::Each(each) => {
let HEach { args, body, expr } = *each;
buff.push(HIR::Each(Box::new(HEach {
args,
expr,
body: to_domfmt(body, opts)?,
})))
}
HIR::IfElse(if_else) => {
let HIfElse { ifs, if_else, els } = *if_else;
let mut buf_if_else = vec![];
for (expr, body) in if_else {
buf_if_else.push((expr, to_domfmt(body, opts)?));
}
let els = if let Some(els) = els {
Some(to_domfmt(els, opts)?)
} else {
None
};
buff.push(HIR::IfElse(Box::new(HIfElse {
ifs: (ifs.0, to_domfmt(ifs.1, opts)?),
if_else: buf_if_else,
els,
})));
}
HIR::Lit(_) => panic!("Need some node"),
ir => buff.push(ir),
}
Ok(())
}