Servers: Fetch and edit members.

Permissions: Use bit representation for permissions.

src/routes/servers/member_fetch.rs

@@ -0,0 +1,21 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use mongodb::bson::doc;
+use rocket_contrib::json::JsonValue;
+
+#[get("/<target>/members/<member>")]
+pub async fn req(user: User, target: Ref, member: String) -> Result<JsonValue> {
+    let target = target.fetch_server().await?;
+
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_server(&target)
+        .for_server()
+        .await?;
+    
+    if !perm.get_view() {
+        Err(Error::MissingPermission)?
+    }
+
+    Ok(json!(Ref::from(member)?.fetch_member(&target.id).await?))
+}