Cleaned up project structure

src/fetching/mod.rs

@@ -0,0 +1,39 @@
+use crate::dance_info::DanceInfo;
+use crate::fetching::types::DanceInfoError;
+
+mod scoringdance;
+mod worldsdc;
+pub mod types;
+
+use async_trait::async_trait;
+use std::sync::Arc;
+
+#[async_trait]
+pub trait WsdcFetcher: Send + Sync {
+    async fn fetch(&self, id: u32) -> Result<DanceInfo, DanceInfoError>;
+}
+
+pub struct WorldsdcFetcher;
+pub struct ScoringDanceFetcher;
+
+#[async_trait]
+impl WsdcFetcher for WorldsdcFetcher {
+    async fn fetch(&self, id: u32) -> Result<DanceInfo, DanceInfoError> {
+        worldsdc::fetch_wsdc_info_wsdc(id).await
+    }
+}
+
+#[async_trait]
+impl WsdcFetcher for ScoringDanceFetcher {
+    async fn fetch(&self, id: u32) -> Result<DanceInfo, DanceInfoError> {
+        scoringdance::fetch_wsdc_info_scoring_dance(id).await
+    }
+}
+
+/// Convenience alias for a shared, dynamic fetcher
+pub type DynWsdcFetcher = Arc<dyn WsdcFetcher>;
+
+/// Back-compat helper that uses the `WorldsdcFetcher`.
+pub async fn fetch_wsdc_info(id: u32) -> Result<DanceInfo, DanceInfoError> {
+    WorldsdcFetcher.fetch(id).await
+}