On server config route, add OIDC config

geneit_backend/src/app_config.rs

@@ -87,6 +87,30 @@ pub struct AppConfig {
         default_value = "http://localhost:3000/reset_password#TOKEN"
     )]
     pub reset_password_url: String,
+
+    /// URL where the OpenID configuration can be found
+    #[arg(long, env, default_value = "url")]
+    pub oidc_configuration_url: String,
+
+    /// Disable OpenID authentication
+    #[arg(long, env)]
+    pub disable_oidc: bool,
+
+    /// OpenID provider name
+    #[arg(long, env, default_value = "3rd party provider")]
+    pub oidc_provider_name: String,
+
+    /// OpenID client ID
+    #[arg(long, env, default_value = "client")]
+    pub oidc_client_id: String,
+
+    /// OpenID client secret
+    #[arg(long, env, default_value = "secret")]
+    pub oidc_client_secret: String,
+
+    /// OpenID login callback URL
+    #[arg(long, env, default_value = "http://localhost:3000/oidc_cb")]
+    pub oidc_callback_url: String,
 }
 
 lazy_static::lazy_static! {
@@ -125,4 +149,31 @@ impl AppConfig {
     pub fn get_password_reset_url(&self, token: &str) -> String {
         self.reset_password_url.replace("TOKEN", token)
     }
+
+    /// Get OpenID providers configuration
+    pub fn openid_providers(&self) -> Vec<OIDCProvider> {
+        if self.disable_oidc {
+            return vec![];
+        }
+
+        return vec![OIDCProvider {
+            id: "first_prov".to_string(),
+            client_id: self.oidc_client_id.to_string(),
+            client_secret: self.oidc_client_secret.to_string(),
+            configuration_url: self.oidc_configuration_url.to_string(),
+            name: self.oidc_provider_name.to_string(),
+        }];
+    }
+}
+
+#[derive(Debug, Clone, serde::Serialize)]
+pub struct OIDCProvider {
+    pub id: String,
+    #[serde(skip_serializing)]
+    pub client_id: String,
+    #[serde(skip_serializing)]
+    pub client_secret: String,
+    #[serde(skip_serializing)]
+    pub configuration_url: String,
+    pub name: String,
 }