Send grpc metadata/auth with reflection requests

Closes https://feedback.yaak.app/p/send-metadata-during-grpc-reflection

src-tauri/src/grpc.rs

@@ -1,10 +1,14 @@
 use std::collections::BTreeMap;
 
+use crate::error::Result;
 use KeyAndValueRef::{Ascii, Binary};
-
+use tauri::{Manager, Runtime, WebviewWindow};
 use yaak_grpc::{KeyAndValueRef, MetadataMap};
+use yaak_models::models::GrpcRequest;
+use yaak_plugins::events::{CallHttpAuthenticationRequest, HttpHeader};
+use yaak_plugins::manager::PluginManager;
 
-pub fn metadata_to_map(metadata: MetadataMap) -> BTreeMap<String, String> {
+pub(crate) fn metadata_to_map(metadata: MetadataMap) -> BTreeMap<String, String> {
     let mut entries = BTreeMap::new();
     for r in metadata.iter() {
         match r {
@@ -14,3 +18,48 @@ pub fn metadata_to_map(metadata: MetadataMap) -> BTreeMap<String, String> {
     }
     entries
 }
+
+pub(crate) async fn build_metadata<R: Runtime>(
+    window: &WebviewWindow<R>,
+    request: &GrpcRequest,
+) -> Result<BTreeMap<String, String>> {
+    let plugin_manager = window.state::<PluginManager>();
+    let mut metadata = BTreeMap::new();
+
+    // Add the rest of metadata
+    for h in request.clone().metadata {
+        if h.name.is_empty() && h.value.is_empty() {
+            continue;
+        }
+
+        if !h.enabled {
+            continue;
+        }
+
+        metadata.insert(h.name, h.value);
+    }
+
+    if let Some(auth_name) = request.authentication_type.clone() {
+        let auth = request.authentication.clone();
+        let plugin_req = CallHttpAuthenticationRequest {
+            context_id: format!("{:x}", md5::compute(request.id.clone())),
+            values: serde_json::from_value(serde_json::to_value(&auth).unwrap()).unwrap(),
+            method: "POST".to_string(),
+            url: request.url.clone(),
+            headers: metadata
+                .iter()
+                .map(|(name, value)| HttpHeader {
+                    name: name.to_string(),
+                    value: value.to_string(),
+                })
+                .collect(),
+        };
+        let plugin_result =
+            plugin_manager.call_http_authentication(&window, &auth_name, plugin_req).await?;
+        for header in plugin_result.set_headers {
+            metadata.insert(header.name, header.value);
+        }
+    }
+
+    Ok(metadata)
+}