feat(auth): add authentication integration

Signed-off-by: kjuulh <contact@kjuulh.io>

como_auth/src/lib.rs

@@ -1,8 +1,13 @@
 use oauth::{OAuth, ZitadelConfig};
 use serde::{Deserialize, Serialize};
 
+mod auth;
 mod introspection;
 mod oauth;
+mod session;
+
+pub use auth::{Auth, AuthService};
+use session::SessionClap;
 
 #[derive(clap::ValueEnum, Clone, PartialEq, Eq, Debug)]
 pub enum AuthEngine {
@@ -10,6 +15,12 @@ pub enum AuthEngine {
     Zitadel,
 }
 
+#[derive(clap::ValueEnum, Clone, PartialEq, Eq, Debug)]
+pub enum SessionBackend {
+    InMemory,
+    Postgresql,
+}
+
 #[derive(clap::Args, Clone, PartialEq, Eq, Debug)]
 pub struct AuthClap {
     #[arg(
@@ -22,8 +33,21 @@ pub struct AuthClap {
     ]
     pub engine: AuthEngine,
 
+    #[arg(
+        env = "SESSION_BACKEND",
+         long = "session-backend",
+         requires_ifs = [
+        ( "postgresql", "PostgresqlSessionClap" )
+       ],
+        default_value = "in-memory" )
+    ]
+    pub session_backend: SessionBackend,
+
     #[clap(flatten)]
     pub zitadel: ZitadelClap,
+
+    #[clap(flatten)]
+    pub session: SessionClap,
 }
 
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -105,7 +129,10 @@ impl AuthClap {
 
 #[cfg(test)]
 mod test {
-    use crate::{AuthClap, AuthEngine, ZitadelClap};
+    use crate::{
+        session::{PostgresqlSessionClap, SessionClap},
+        AuthClap, AuthEngine, SessionBackend, ZitadelClap,
+    };
     use clap::Parser;
     use pretty_assertions::assert_eq;
 
@@ -141,6 +168,10 @@ mod test {
                         token_url: None,
                         authority_url: None,
                     },
+                    session_backend: SessionBackend::InMemory,
+                    session: SessionClap {
+                        postgresql: PostgresqlSessionClap { conn: None }
+                    }
                 }
             }
         );
@@ -163,6 +194,10 @@ mod test {
                         token_url: None,
                         authority_url: None,
                     },
+                    session_backend: crate::SessionBackend::InMemory,
+                    session: crate::SessionClap {
+                        postgresql: PostgresqlSessionClap { conn: None }
+                    }
                 }
             }
         );
@@ -195,6 +230,10 @@ mod test {
                         token_url: Some("https://something".into()),
                         authority_url: Some("https://something".into()),
                     },
+                    session_backend: crate::SessionBackend::InMemory,
+                    session: crate::SessionClap {
+                        postgresql: PostgresqlSessionClap { conn: None }
+                    }
                 },
             }
         );