1 files changed, 63 insertions, 0 deletions
diff --git a/src/ui/assets.rs b/src/ui/assets.rs
new file mode 100644
index 0000000..6a7563a
--- /dev/null
+++ b/src/ui/assets.rs
@@ -0,0 +1,63 @@
+use ::mime::{FromStrError, Mime};
+use axum::{
+    http::{header, StatusCode},
+    response::{IntoResponse, Response},
+};
+use rust_embed::EmbeddedFile;
+
+use super::{error::NotFound, mime};
+use crate::error::Internal;
+
+#[derive(rust_embed::Embed)]
+#[folder = "target/ui"]
+pub struct Assets;
+
+impl Assets {
+    pub fn load(path: impl AsRef<str>) -> Result<Asset, Error> {
+        let path = path.as_ref();
+        let mime = mime::from_path(path)?;
+
+        Self::get(path)
+            .map(|file| Asset(mime, file))
+            .ok_or(Error::NotFound(path.into()))
+    }
+
+    pub fn index() -> Result<Asset, Internal> {
+        // "not found" in this case really is an internal error, as it should
+        // never happen. `index.html` is a known-valid path with a known-valid
+        // file extension.
+        Ok(Self::load("index.html")?)
+    }
+}
+
+pub struct Asset(Mime, EmbeddedFile);
+
+impl IntoResponse for Asset {
+    fn into_response(self) -> Response {
+        let Self(mime, file) = self;
+        (
+            StatusCode::OK,
+            [(header::CONTENT_TYPE, mime.as_ref())],
+            file.data,
+        )
+            .into_response()
+    }
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("not found: {0}")]
+    NotFound(String),
+    #[error(transparent)]
+    Mime(#[from] FromStrError),
+}
+
+impl IntoResponse for Error {
+    fn into_response(self) -> Response {
+        #[allow(clippy::match_wildcard_for_single_variants)]
+        match self {
+            Self::NotFound(_) => NotFound(self.to_string()).into_response(),
+            other => Internal::from(other).into_response(),
+        }
+    }
+}