fix: resolve WIT binding namespace issues and add missing dependencies

- Update user_service.rs imports to match actual wit-bindgen output structure
- Add serde_json and uuid dependencies to @crates repository
- Fix WIT binding implementation to use correct Guest trait structure
- Resolve self-referential method call in get_service_stats

Author: avrabe

MODULE.bazel.lock

@@ -43,6 +43,11 @@ rust_wasm_component_bindgen(
     srcs = ["components/user_service.rs"],
     visibility = ["//visibility:public"],
     wit = ":user_service_wit",
+    deps = [
+        "@crates//:serde_json",
+        "@crates//:serde", 
+        "@crates//:uuid",
+    ],
 )
 
 # Alias for auth service to match expected name

examples/cpp_component/multi_component_system/BUILD.bazel

@@ -3,10 +3,10 @@ use std::collections::HashMap;
 use uuid::Uuid;
 
 // Use the generated bindings from rust_wasm_component_bindgen
-use user_service_bindings::exports::example::user_service::user_service::Guest;
+use user_service_bindings::exports::user_service::Guest;
 
 // Re-export the generated WIT types
-pub use user_service_bindings::exports::example::user_service::user_service::*;
+pub use user_service_bindings::exports::user_service::*;
 
 /// Rust User Service Component
 ///
@@ -369,10 +369,48 @@ impl UserServiceImpl {
 struct UserService;
 
 impl Guest for UserService {
-    type UserService = UserServiceImpl;
+    fn create_user(&mut self, request: CreateUserRequest) -> UserResult {
+        UserServiceImpl::get_instance().create_user(request)
+    }
+
+    fn get_user(&mut self, user_id: String) -> UserResult {
+        UserServiceImpl::get_instance().get_user(user_id)
+    }
+
+    fn update_user(&mut self, user_id: String, request: ProfileUpdateRequest) -> bool {
+        UserServiceImpl::get_instance().update_user(user_id, request)
+    }
+
+    fn delete_user(&mut self, user_id: String) -> bool {
+        UserServiceImpl::get_instance().delete_user(user_id)
+    }
+
+    fn search_users(&mut self, query: SearchQuery) -> Vec<User> {
+        UserServiceImpl::get_instance().search_users(query)
+    }
+
+    fn add_friend(&mut self, user_id: String, friend_id: String) -> bool {
+        UserServiceImpl::get_instance().add_friend(user_id, friend_id)
+    }
+
+    fn remove_friend(&mut self, user_id: String, friend_id: String) -> bool {
+        UserServiceImpl::get_instance().remove_friend(user_id, friend_id)
+    }
+
+    fn get_friends(&mut self, user_id: String) -> Vec<String> {
+        UserServiceImpl::get_instance().get_friends(user_id)
+    }
+
+    fn health_check(&mut self) -> bool {
+        UserServiceImpl::get_instance().health_check()
+    }
+
+    fn get_service_stats(&mut self) -> String {
+        UserServiceImpl::get_instance().get_service_stats()
+    }
 }
 
-impl GuestUserService for UserServiceImpl {
+impl UserServiceImpl {
     fn create_user(&mut self, request: CreateUserRequest) -> UserResult {
         match self.create_user_profile(&request) {
             Ok(profile) => UserResult::Success(User {
@@ -480,7 +518,16 @@ impl GuestUserService for UserServiceImpl {
     }
 
     fn get_service_stats(&mut self) -> String {
-        let stats = self.get_service_stats();
+        let stats = ServiceMetrics {
+            total_users: self.users.len() as u64,
+            active_sessions: self.user_sessions.values().map(|s| s.len() as u64).sum(),
+            profile_updates: self.metrics.profile_updates,
+            relationship_operations: self.metrics.relationship_operations,
+            cache_hits: self.metrics.cache_hits,
+            cache_misses: self.metrics.cache_misses,
+            async_operations: self.metrics.async_operations,
+            zero_copy_operations: self.metrics.zero_copy_operations,
+        };
         // Safe JSON serialization using serde
         serde_json::to_string(&stats).unwrap_or_else(|_| "{}".to_string())
     }

examples/cpp_component/multi_component_system/components/user_service.rs

@@ -29,6 +29,7 @@ tempfile = "3.0"
 async-trait = "0.1"
 wstd = "0.5.3"  # WebAssembly standard library for WASI Preview 2
 wit-bindgen = "0.43.0"  # WIT binding generation for macro usage
+uuid = { version = "1.0", features = ["v4"] }  # UUID generation for user service
 
 [dev-dependencies]
 tokio-test = "0.4"