Tweak schema api

crates/pile-dataset/src/serve/config_schema.rs

@@ -0,0 +1,31 @@
+use axum::{
+	Json,
+	extract::State,
+	http::StatusCode,
+	response::{IntoResponse, Response},
+};
+use std::{collections::HashMap, sync::Arc};
+
+pub use pile_config::FieldSpec;
+
+use crate::Datasets;
+
+pub type FieldsResponse = HashMap<String, FieldSpec>;
+
+/// Retrieve this dataset's schema.
+#[utoipa::path(
+	get,
+	path = "/config/schema",
+	responses(
+		(status = 200, description = "This dataset's schema"),
+	)
+)]
+pub async fn config_schema(State(state): State<Arc<Datasets>>) -> Response {
+	let fields: FieldsResponse = state
+		.config
+		.schema
+		.iter()
+		.map(|(k, v)| (k.as_str().to_owned(), v.clone()))
+		.collect();
+	(StatusCode::OK, Json(fields)).into_response()
+}

crates/pile-dataset/src/serve/mod.rs

@@ -17,26 +17,36 @@ pub use item::*;
 mod extract;
 pub use extract::*;
 
-mod field;
-pub use field::*;
-
 mod items;
 pub use items::*;
 
+mod config_schema;
+pub use config_schema::*;
+
+mod schema_field;
+pub use schema_field::*;
+
 mod schema;
 pub use schema::*;
 
 #[derive(OpenApi)]
 #[openapi(
 	tags(),
-	paths(lookup, item_get, get_extract, items_list, get_field, get_schema),
+	paths(
+		lookup,
+		item_get,
+		get_extract,
+		items_list,
+		config_schema,
+		schema_field,
+		schema_all
+	),
 	components(schemas(
 		LookupRequest,
 		LookupResponse,
 		LookupResult,
 		ItemQuery,
 		ExtractQuery,
-		FieldQuery,
 		ItemsQuery,
 		ItemsResponse,
 		ItemRef
@@ -56,9 +66,10 @@ impl Datasets {
 			.route("/lookup", post(lookup))
 			.route("/item", get(item_get))
 			.route("/extract", get(get_extract))
-			.route("/field", get(get_field))
 			.route("/items", get(items_list))
-			.route("/schema", get(get_schema))
+			.route("/config/schema", get(config_schema))
+			.route("/schema", get(schema_all))
+			.route("/schema/{field}", get(schema_field))
 			.with_state(self.clone());
 
 		if let Some(prefix) = prefix {
@@ -71,8 +82,14 @@ impl Datasets {
 				Some(prefix) => format!("{prefix}/docs"),
 			};
 
-			let docs = SwaggerUi::new(docs_path.clone())
-				.url(format!("{}/openapi.json", docs_path), Api::openapi());
+			let api = Api::openapi();
+			let api = match prefix {
+				None => api,
+				Some(prefix) => utoipa::openapi::OpenApi::default().nest(prefix, api),
+			};
+
+			let docs =
+				SwaggerUi::new(docs_path.clone()).url(format!("{}/openapi.json", docs_path), api);
 
 			router = router.merge(docs);
 		}

crates/pile-dataset/src/serve/schema.rs

@@ -1,31 +1,130 @@
 use axum::{
 	Json,
-	extract::State,
+	extract::{Query, State},
 	http::StatusCode,
 	response::{IntoResponse, Response},
 };
+use pile_config::Label;
+use pile_value::{extract::traits::ExtractState, value::PileValue};
+use serde::{Deserialize, Serialize};
 use std::{collections::HashMap, sync::Arc};
-
-pub use pile_config::FieldSpec;
+use utoipa::IntoParams;
 
 use crate::Datasets;
 
-pub type FieldsResponse = HashMap<String, FieldSpec>;
+#[derive(Deserialize, IntoParams)]
+pub struct SchemaQuery {
+	source: String,
+	key: String,
 
-/// Retrieve this dataset's schema.
+	#[serde(default)]
+	hidden: bool,
+}
+
+#[derive(Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ApiValue {
+	Binary { binary: bool, mime: String },
+	Object { object: bool },
+	Array(Vec<ApiValue>),
+	String(String),
+	Number(serde_json::Number),
+	Null,
+}
+
+pub type SchemaResponse = HashMap<String, ApiValue>;
+
+async fn pile_value_to_api(
+	state: &ExtractState,
+	value: PileValue,
+) -> Result<ApiValue, std::io::Error> {
+	match value {
+		PileValue::String(s) => Ok(ApiValue::String(s.to_string())),
+		PileValue::U64(n) => Ok(ApiValue::Number(n.into())),
+		PileValue::I64(n) => Ok(ApiValue::Number(n.into())),
+		PileValue::Null => Ok(ApiValue::Null),
+
+		PileValue::Blob { mime, .. } => Ok(ApiValue::Binary {
+			binary: true,
+			mime: mime.to_string(),
+		}),
+
+		PileValue::Array(arr) => {
+			let mut out = Vec::with_capacity(arr.len());
+			for item in arr.iter() {
+				out.push(Box::pin(pile_value_to_api(state, item.clone())).await?);
+			}
+			Ok(ApiValue::Array(out))
+		}
+
+		PileValue::ObjectExtractor(_) | PileValue::ListExtractor(_) | PileValue::Item(_) => {
+			Ok(ApiValue::Object { object: true })
+		}
+	}
+}
+
+/// Get all schema field values for a single item.
 #[utoipa::path(
 	get,
 	path = "/schema",
+	params(
+		("source" = String, Query, description = "Source label"),
+		("key" = String, Query, description = "Item key"),
+		("hidden" = bool, Query, description = "Include hidden fields (default: false)"),
+	),
 	responses(
-		(status = 200, description = "This dataset's schema"),
+		(status = 200, description = "Schema field values as a map of label to value"),
+		(status = 400, description = "Invalid source label"),
+		(status = 404, description = "Item not found"),
+		(status = 500, description = "Internal server error"),
 	)
 )]
-pub async fn get_schema(State(state): State<Arc<Datasets>>) -> Response {
-	let fields: FieldsResponse = state
-		.config
-		.schema
-		.iter()
-		.map(|(k, v)| (k.as_str().to_owned(), v.clone()))
-		.collect();
-	(StatusCode::OK, Json(fields)).into_response()
+pub async fn schema_all(
+	State(state): State<Arc<Datasets>>,
+	Query(params): Query<SchemaQuery>,
+) -> Response {
+	let label = match Label::try_from(params.source.clone()) {
+		Ok(l) => l,
+		Err(e) => return (StatusCode::BAD_REQUEST, format!("{e:?}")).into_response(),
+	};
+
+	let Some(item) = state.get(&label, &params.key).await else {
+		return StatusCode::NOT_FOUND.into_response();
+	};
+
+	let extract_state = ExtractState { ignore_mime: false };
+	let item = PileValue::Item(item);
+
+	let mut result: SchemaResponse = HashMap::new();
+
+	for (field_label, field_spec) in &state.config.schema {
+		if field_spec.hidden && !params.hidden {
+			continue;
+		}
+
+		let mut value = None;
+		for path in &field_spec.path {
+			match item.query(&extract_state, path).await {
+				Ok(Some(PileValue::Null)) | Ok(None) => continue,
+				Ok(Some(v)) => {
+					value = Some(v);
+					break;
+				}
+				Err(e) => {
+					return (StatusCode::INTERNAL_SERVER_ERROR, format!("{e:?}")).into_response();
+				}
+			}
+		}
+
+		let Some(v) = value else { continue };
+
+		let api_value = match pile_value_to_api(&extract_state, v).await {
+			Ok(v) => v,
+			Err(e) => return (StatusCode::INTERNAL_SERVER_ERROR, format!("{e:?}")).into_response(),
+		};
+
+		result.insert(field_label.as_str().to_owned(), api_value);
+	}
+
+	(StatusCode::OK, Json(result)).into_response()
 }

crates/pile-dataset/src/serve/schema_field.rs

@@ -1,6 +1,6 @@
 use axum::{
 	Json,
-	extract::{Query, State},
+	extract::{Path, Query, State},
 	http::{StatusCode, header},
 	response::{IntoResponse, Response},
 };
@@ -9,29 +9,28 @@ use pile_value::{extract::traits::ExtractState, value::PileValue};
 use serde::Deserialize;
 use std::{sync::Arc, time::Instant};
 use tracing::debug;
-use utoipa::{IntoParams, ToSchema};
+use utoipa::IntoParams;
 
 use crate::Datasets;
 
-#[derive(Deserialize, ToSchema, IntoParams)]
-pub struct FieldQuery {
+#[derive(Deserialize, IntoParams)]
+pub struct SchemaFieldQuery {
 	source: String,
 	key: String,
-	field: String,
 
 	#[serde(default)]
 	download: bool,
 	name: Option<String>,
 }
 
-/// Extract a specific field from an item's metadata.
+/// Extract a specific schema field from an item's metadata.
 #[utoipa::path(
 	get,
-	path = "/field",
+	path = "/schema/{field}",
 	params(
+		("field" = String, Path, description = "Schema field"),
 		("source" = String, Query, description = "Source label"),
 		("key" = String, Query, description = "Item key"),
-		("field" = String, Query, description = "Schema field"),
 		("name" = Option<String>, Query, description = "Downloaded filename; defaults to the last segment of the key"),
 	),
 	responses(
@@ -41,9 +40,10 @@ pub struct FieldQuery {
 		(status = 500, description = "Internal server error"),
 	)
 )]
-pub async fn get_field(
+pub async fn schema_field(
 	State(state): State<Arc<Datasets>>,
-	Query(params): Query<FieldQuery>,
+	Path(field): Path<String>,
+	Query(params): Query<SchemaFieldQuery>,
 ) -> Response {
 	let start = Instant::now();
 
@@ -53,22 +53,22 @@ pub async fn get_field(
 	};
 
 	debug!(
-		message = "Serving /field",
+		message = "Serving /schema/{field}",
 		source = params.source,
 		key = params.key,
-		field = params.field,
+		field = field,
 	);
 
 	let Some(item) = state.get(&label, &params.key).await else {
 		return StatusCode::NOT_FOUND.into_response();
 	};
 
-	let field = match Label::new(&params.field) {
+	let field_label = match Label::new(&field) {
 		Some(x) => x,
 		None => return StatusCode::NOT_FOUND.into_response(),
 	};
 
-	let paths = match state.config.schema.get(&field) {
+	let paths = match state.config.schema.get(&field_label) {
 		Some(x) => &x.path,
 		None => return StatusCode::NOT_FOUND.into_response(),
 	};
@@ -93,10 +93,10 @@ pub async fn get_field(
 	};
 
 	debug!(
-		message = "Served /field",
+		message = "Served /schema/{field}",
 		source = params.source,
 		key = params.key,
-		field = params.field,
+		field = field,
 		time_ms = start.elapsed().as_millis()
 	);