Refactor into grpc events

src-tauri/src/grpc.rs

@@ -0,0 +1,16 @@
+use std::collections::HashMap;
+
+use KeyAndValueRef::{Ascii, Binary};
+
+use grpc::{KeyAndValueRef, MetadataMap};
+
+pub fn metadata_to_map(metadata: MetadataMap) -> HashMap<String, String> {
+    let mut entries = HashMap::new();
+    for r in metadata.iter() {
+        match r {
+            Ascii(k, v) => entries.insert(k.to_string(), v.to_str().unwrap().to_string()),
+            Binary(k, v) => entries.insert(k.to_string(), format!("{:?}", v)),
+        };
+    }
+    entries
+}