update

frontend/src/repositories/http_client.rs

@@ -0,0 +1,40 @@
+use wasm_bindgen::JsCast;
+
+pub struct HttpClient;
+
+impl HttpClient {
+    /// Fetch tile data with caching
+    pub async fn fetch_cached(url: &str) -> Option<Vec<u8>> {
+        let window = web_sys::window()?;
+        let caches = window.caches().ok()?;
+        let cache_name = "map-data-v5-sand";
+        let cache = wasm_bindgen_futures::JsFuture::from(caches.open(cache_name)).await.ok()?;
+        let cache: web_sys::Cache = cache.dyn_into().ok()?;
+
+        let request = web_sys::Request::new_with_str(url).ok()?;
+        let match_promise = cache.match_with_request(&request);
+        let match_val = wasm_bindgen_futures::JsFuture::from(match_promise).await.ok()?;
+
+        if !match_val.is_undefined() {
+            let response: web_sys::Response = match_val.dyn_into().ok()?;
+            let buffer_promise = response.array_buffer().ok()?;
+            let buffer = wasm_bindgen_futures::JsFuture::from(buffer_promise).await.ok()?;
+            let array = js_sys::Uint8Array::new(&buffer);
+            return Some(array.to_vec());
+        }
+
+        // Network fetch
+        let response_val = wasm_bindgen_futures::JsFuture::from(window.fetch_with_request(&request)).await.ok()?;
+        let response: web_sys::Response = response_val.dyn_into().ok()?;
+        
+        // Clone response for cache
+        let response_clone = response.clone().ok()?;
+        let put_promise = cache.put_with_request(&request, &response_clone);
+        wasm_bindgen_futures::JsFuture::from(put_promise).await.ok()?;
+
+        let buffer_promise = response.array_buffer().ok()?;
+        let buffer = wasm_bindgen_futures::JsFuture::from(buffer_promise).await.ok()?;
+        let array = js_sys::Uint8Array::new(&buffer);
+        Some(array.to_vec())
+    }
+}