Add default clients (#105)

* Add the possibility to create client enabled by default when creating new accounts
* Can mark clients are granted for all users, regardless of users accounts grants

Reviewed-on: #105

src/data/client.rs

@@ -6,11 +6,28 @@ pub struct ClientID(pub String);
 
 #[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
 pub struct Client {
+    /// The ID of the client
     pub id: ClientID,
+
+    /// The human-readable name of the client
     pub name: String,
+
+    /// A short description of the service provided by the client
     pub description: String,
+
+    /// The secret used by the client to retrieve authenticated users information
     pub secret: String,
+
+    /// The URI where the users should be redirected once authenticated
     pub redirect_uri: String,
+
+    /// Specify if the client must be allowed by default for new account
+    #[serde(default = "bool::default")]
+    pub default: bool,
+
+    /// Specify whether a client is granted to all users
+    #[serde(default = "bool::default")]
+    pub granted_to_all_users: bool,
 }
 
 impl PartialEq for Client {
@@ -33,6 +50,13 @@ impl EntityManager<Client> {
         None
     }
 
+    /// Get the list of default clients.
+    ///
+    /// i.e. the clients that are granted to new accounts by default
+    pub fn get_default_clients(&self) -> Vec<&Client> {
+        self.iter().filter(|u| u.default).collect()
+    }
+
     pub fn apply_environment_variables(&mut self) {
         for c in self.iter_mut() {
             c.id = ClientID(apply_env_vars(&c.id.0));