feat: kickstart basic controller

app/controllers/omniauth_controller.rb

@@ -0,0 +1,46 @@
+class OmniauthController < ApplicationController
+  skip_before_action :verify_authenticity_token
+  skip_before_action :authenticate_user!
+  skip_before_action :set_current_user
+  skip_before_action :check_authorization
+
+  def request
+    # This will be handled by OmniAuth middleware
+    # The request will be redirected to the IdP
+  end
+
+  def callback
+    auth = request.env['omniauth.auth']
+    account_id = params[:account_id]
+
+    if auth.present?
+      render json: {
+        message: 'SAML authentication successful',
+        account_id: account_id,
+        provider: auth.provider,
+        uid: auth.uid,
+        info: {
+          email: auth.info.email,
+          name: auth.info.name,
+          first_name: auth.info.first_name,
+          last_name: auth.info.last_name
+        },
+        extra: {
+          raw_info: auth.extra.raw_info
+        }
+      }
+    else
+      render json: {
+        error: 'SAML authentication failed',
+        message: request.env['omniauth.error'] || 'Unknown error'
+      }, status: :unauthorized
+    end
+  end
+
+  def failure
+    render json: {
+      error: 'SAML authentication failed',
+      message: params[:message] || request.env['omniauth.error'] || 'Unknown error'
+    }, status: :unauthorized
+  end
+end