feat: Implement oauth service and client registration

src/service/oauth/mod.rs

@@ -0,0 +1,72 @@
+use std::sync::Arc;
+
+use base64::Engine;
+use conduwuit::{Result, utils::hash::sha256};
+use database::{Deserialized, Json, Map};
+
+use crate::{Dep, config, oauth::client_metadata::ClientMetadata};
+
+pub mod client_metadata;
+
+pub struct Service {
+	services: Services,
+	db: Data,
+}
+
+struct Data {
+	clientid_clientmetadata: Arc<Map>,
+}
+
+struct Services {
+	config: Dep<config::Service>,
+}
+
+impl crate::Service for Service {
+	fn build(args: crate::Args<'_>) -> Result<Arc<Self>> {
+		Ok(Arc::new(Self {
+			services: Services {
+				config: args.depend::<config::Service>("config"),
+			},
+			db: Data {
+				clientid_clientmetadata: args.db["clientid_clientmetadata"].clone(),
+			},
+		}))
+	}
+
+	fn name(&self) -> &str { crate::service::make_name(std::module_path!()) }
+}
+
+impl Service {
+	pub async fn register_client(
+		&self,
+		metadata: &ClientMetadata,
+	) -> Result<String, &'static str> {
+		metadata.validate()?;
+
+		let client_id = base64::prelude::BASE64_STANDARD
+			.encode(sha256::hash(serde_json::to_string(metadata).unwrap().as_bytes()));
+
+		if self
+			.db
+			.clientid_clientmetadata
+			.exists(&client_id)
+			.await
+			.is_err()
+		{
+			self.db
+				.clientid_clientmetadata
+				.raw_put(&client_id, Json(metadata.clone()));
+		}
+
+		Ok(client_id)
+	}
+
+	async fn get_client_registration(&self, client_id: &str) -> Option<ClientMetadata> {
+		self.db
+			.clientid_clientmetadata
+			.get(client_id)
+			.await
+			.deserialized()
+			.ok()
+	}
+}