Allow rescanning media folders

Co-Authored-By: codex <[email protected]>

src/emby.rs

@@ -250,6 +250,32 @@ impl Client {
         Ok(resp.items)
     }
 
+    /// Ask Emby to rescan/refresh a library folder or media folder.
+    pub async fn refresh_item(&self, item_id: &str) -> Result<()> {
+        let url = format!("{}/Items/{item_id}/Refresh", self.server);
+        let resp = self
+            .http
+            .post(&url)
+            .headers(self.headers())
+            .query(&[
+                ("Recursive", "true"),
+                ("ImageRefreshMode", "Default"),
+                ("MetadataRefreshMode", "Default"),
+                ("ReplaceAllImages", "false"),
+                ("ReplaceAllMetadata", "false"),
+            ])
+            .send()
+            .await
+            .with_context(|| format!("POST {url}"))?;
+
+        let status = resp.status();
+        if !status.is_success() {
+            let body = resp.text().await.unwrap_or_default();
+            return Err(anyhow!("refresh failed: HTTP {status}: {body}"));
+        }
+        Ok(())
+    }
+
     pub fn stream_url(&self, item_id: &str) -> String {
         format!(
             "{}/Videos/{}/stream?Static=true&api_key={}&DeviceId={}",