completed SMS gateway project

app/channels/application_cable/connection.rb

@@ -0,0 +1,31 @@
+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+    identified_by :current_gateway
+
+    def connect
+      self.current_gateway = find_verified_gateway
+      logger.info "Gateway #{current_gateway.device_id} connected"
+    end
+
+    private
+
+    def find_verified_gateway
+      # Get API key from request params
+      api_key = request.params[:api_key]
+
+      if api_key.blank?
+        reject_unauthorized_connection
+      end
+
+      # Hash the API key and find gateway
+      api_key_digest = Digest::SHA256.hexdigest(api_key)
+      gateway = Gateway.find_by(api_key_digest: api_key_digest, active: true)
+
+      if gateway
+        gateway
+      else
+        reject_unauthorized_connection
+      end
+    end
+  end
+end