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use std::{borrow::Cow, fmt::Display};
use anyhow::Result;
use rustc_hash::FxHashSet;
use turbo_rcstr::{RcStr, rcstr};
use turbo_tasks::{ReadRef, ResolvedVc, TryJoinIterExt, Vc};
use turbo_tasks_fs::{File, json::parse_json_with_source_context};
use turbopack_core::{
asset::AssetContent,
introspect::{Introspectable, IntrospectableChildren},
version::VersionedContentExt,
};
use turbopack_ecmascript::utils::FormatIter;
use crate::source::{
ContentSource, ContentSourceContent, ContentSourceData, GetContentSourceContent,
route_tree::{RouteTree, RouteTrees, RouteType},
};
#[turbo_tasks::value(shared)]
pub struct IntrospectionSource {
pub roots: FxHashSet<ResolvedVc<Box<dyn Introspectable>>>,
}
fn introspection_source() -> RcStr {
rcstr!("introspection-source")
}
#[turbo_tasks::value_impl]
impl Introspectable for IntrospectionSource {
#[turbo_tasks::function]
fn ty(&self) -> Vc<RcStr> {
Vc::cell(introspection_source())
}
#[turbo_tasks::function]
fn title(&self) -> Vc<RcStr> {
Vc::cell(introspection_source())
}
#[turbo_tasks::function]
fn children(&self) -> Vc<IntrospectableChildren> {
Vc::cell(
self.roots
.iter()
.map(|root| (rcstr!("root"), *root))
.collect(),
)
}
}
struct HtmlEscaped<T>(T);
impl<T: Display> Display for HtmlEscaped<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(
&self
.0
.to_string()
// TODO this is pretty inefficient
.replace('&', "&")
.replace('>', ">")
.replace('<', "<"),
)
}
}
struct HtmlStringEscaped<T>(T);
impl<T: Display> Display for HtmlStringEscaped<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(
&self
.0
.to_string()
// TODO this is pretty inefficient
.replace('&', "&")
.replace('"', """)
.replace('>', ">")
.replace('<', "<"),
)
}
}
#[turbo_tasks::value_impl]
impl ContentSource for IntrospectionSource {
#[turbo_tasks::function]
async fn get_routes(self: Vc<Self>) -> Result<Vc<RouteTree>> {
Ok(Vc::<RouteTrees>::cell(vec![
RouteTree::new_route(Vec::new(), RouteType::Exact, Vc::upcast(self))
.to_resolved()
.await?,
RouteTree::new_route(Vec::new(), RouteType::CatchAll, Vc::upcast(self))
.to_resolved()
.await?,
])
.merge())
}
}
#[turbo_tasks::value_impl]
impl GetContentSourceContent for IntrospectionSource {
#[turbo_tasks::function]
async fn get(
self: ResolvedVc<Self>,
path: RcStr,
_data: ContentSourceData,
) -> Result<Vc<ContentSourceContent>> {
// get last segment
let path = &path[path.rfind('/').unwrap_or(0) + 1..];
let introspectable = if path.is_empty() {
let roots = &self.await?.roots;
if roots.len() == 1 {
*roots.iter().next().unwrap()
} else {
ResolvedVc::upcast(self)
}
} else {
parse_json_with_source_context(path)?
};
let internal_ty = Vc::debug_identifier(*introspectable).await?;
fn str_or_err(s: &Result<ReadRef<RcStr>>) -> Cow<'_, str> {
s.as_ref().map_or_else(
|e| Cow::<'_, str>::Owned(format!("ERROR: {e:?}")),
|d| Cow::Borrowed(&**d),
)
}
let ty = introspectable.ty().await;
let ty = str_or_err(&ty);
let title = introspectable.title().await;
let title = str_or_err(&title);
let details = introspectable.details().await;
let details = str_or_err(&details);
let children = introspectable.children().await?;
let has_children = !children.is_empty();
let children = children
.iter()
.map(|(name, child)| async move {
let ty = child.ty().await;
let ty = str_or_err(&ty);
let title = child.title().await;
let title = str_or_err(&title);
let path = serde_json::to_string(&child)?;
Ok(format!(
"<li>{name} <!-- {title} --><a href=\"./{path}\">[{ty}] {title}</a></li>",
name = HtmlEscaped(name),
title = HtmlEscaped(title),
path = HtmlStringEscaped(urlencoding::encode(&path)),
ty = HtmlEscaped(ty),
))
})
.try_join()
.await?;
let details = if details.is_empty() {
String::new()
} else if has_children {
format!(
"<details><summary><h3 style=\"display: \
inline;\">Details</h3></summary><pre>{details}</pre></details>",
details = HtmlEscaped(details)
)
} else {
format!(
"<h3>Details</h3><pre>{details}</pre>",
details = HtmlEscaped(details)
)
};
let html: RcStr = format!(
"<!DOCTYPE html>
<html><head><title>{title}</title></head>
<body>
<h3>{internal_ty}</h3>
<h2>{ty}</h2>
<h1>{title}</h1>
{details}
<ul>{children}</ul>
</body>
</html>",
title = HtmlEscaped(title),
ty = HtmlEscaped(ty),
children = FormatIter(|| children.iter())
)
.into();
Ok(ContentSourceContent::static_content(
AssetContent::file(
File::from(html)
.with_content_type(mime::TEXT_HTML_UTF_8)
.into(),
)
.versioned(),
))
}
}
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