Generalize camera endpoints.

src/utils/endpoint.ts

@@ -0,0 +1,33 @@
+import { CameraEndpoint } from '../camera-manager/types';
+import { dispatchErrorMessageEvent } from '../components/message';
+import { localize } from '../localize/localize';
+import { ExtendedHomeAssistant } from '../types';
+import { errorToConsole } from './basic';
+import { homeAssistantSignPath } from './ha';
+
+export const getEndpointAddressOrDispatchError = async (
+  element: HTMLElement,
+  hass: ExtendedHomeAssistant,
+  endpoint: CameraEndpoint,
+  expires?: number,
+): Promise<string | null> => {
+  let address: string | null;
+  if (!endpoint.sign) {
+    address = endpoint.endpoint;
+  } else {
+    let response: string | null | undefined;
+    try {
+      response = await homeAssistantSignPath(hass, endpoint.endpoint, expires);
+    } catch (e) {
+      errorToConsole(e as Error);
+      return null;
+    }
+    address = response ? response.replace(/^http/i, 'ws') : null;
+  }
+
+  if (!address) {
+    dispatchErrorMessageEvent(element, localize('error.failed_sign'));
+    return null;
+  }
+  return address;
+};