refactor: apply SOLID principles

1 files changed, 49 insertions, 0 deletions

diff --git a/src/services/mod.rs b/src/services/mod.rs
new file mode 100644
index 0000000..26d74e3
--- /dev/null
+++ b/src/services/mod.rs
@@ -0,0 +1,49 @@
+use anyhow::Result;
+use std::collections::HashMap;
+
+/// Service trait for client authentication
+pub trait ClientAuthenticator: Send + Sync {
+    fn authenticate(
+        &self,
+        params: &HashMap<String, String>,
+        auth_header: Option<&str>,
+    ) -> Result<(String, String), String>; // Returns (client_id, client_secret)
+}
+
+/// Service trait for rate limiting
+pub trait RateLimiter: Send + Sync {
+    fn check_rate_limit(&self, identifier: &str, endpoint: &str) -> Result<()>;
+}
+
+/// Service trait for audit logging
+pub trait AuditLogger: Send + Sync {
+    fn log_event(
+        &self,
+        event_type: &str,
+        client_id: Option<&str>,
+        user_id: Option<&str>,
+        ip_address: Option<&str>,
+        success: bool,
+        details: Option<&str>,
+    ) -> Result<()>;
+}
+
+/// Service trait for token generation
+pub trait TokenGenerator: Send + Sync {
+    fn generate_access_token(
+        &self,
+        user_id: &str,
+        client_id: &str,
+        scope: &Option<String>,
+        token_id: &str,
+    ) -> Result<String, String>;
+
+    fn generate_refresh_token(
+        &self,
+        client_id: &str,
+        user_id: &str,
+        scope: &Option<String>,
+    ) -> Result<String, String>;
+}
+
+pub mod implementations;