Add implicit authentication flow (#255)

Reviewed-on: #255
Co-authored-by: Pierre HUBERT <pierre.git@communiquons.org>
Co-committed-by: Pierre HUBERT <pierre.git@communiquons.org>

src/data/client.rs

@@ -4,6 +4,12 @@ use crate::utils::string_utils::apply_env_vars;
 #[derive(Clone, Debug, serde::Serialize, serde::Deserialize, Eq, PartialEq)]
 pub struct ClientID(pub String);
 
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum AuthenticationFlow {
+    AuthorizationCode,
+    Implicit,
+}
+
 #[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
 pub struct Client {
     /// The ID of the client
@@ -16,7 +22,8 @@ pub struct Client {
     pub description: String,
 
     /// The secret used by the client to retrieve authenticated users information
-    pub secret: String,
+    /// This value is absent if implicit authentication flow is used
+    pub secret: Option<String>,
 
     /// The URI where the users should be redirected once authenticated
     pub redirect_uri: String,
@@ -42,6 +49,16 @@ impl PartialEq for Client {
 
 impl Eq for Client {}
 
+impl Client {
+    /// Get the client authentication flow
+    pub fn auth_flow(&self) -> AuthenticationFlow {
+        match self.secret {
+            None => AuthenticationFlow::Implicit,
+            Some(_) => AuthenticationFlow::AuthorizationCode,
+        }
+    }
+}
+
 pub type ClientManager = EntityManager<Client>;
 
 impl EntityManager<Client> {
@@ -66,7 +83,7 @@ impl EntityManager<Client> {
             c.id = ClientID(apply_env_vars(&c.id.0));
             c.name = apply_env_vars(&c.name);
             c.description = apply_env_vars(&c.description);
-            c.secret = apply_env_vars(&c.secret);
+            c.secret = c.secret.as_deref().map(apply_env_vars);
             c.redirect_uri = apply_env_vars(&c.redirect_uri);
         }
     }