Новый виды условных шагов (#6)

Co-authored-by: gorbenko.pavel <gorbenko.pavel@tansu.kz>
Reviewed-on: http://git.tnsu.kz/gorbenko.pavel/tnsu-approval-route/pulls/6

frontend/src/webparts/approvalAdmin/hooks/useSharePointSiteTitle.ts

@@ -0,0 +1,36 @@
+import * as React from 'react';
+import { SharePointListsClient } from '../services/sharePointLists';
+
+export interface SharePointSiteTitleState {
+  title: string | null;
+  isLoading: boolean;
+}
+
+/** Заголовок сайта SharePoint по его url — для отображения «Название — url» вместо голого url. */
+export function useSharePointSiteTitle(
+  client: SharePointListsClient | undefined,
+  siteUrl: string | undefined | null
+): SharePointSiteTitleState {
+  const [title, setTitle] = React.useState<string | null>(null);
+  const [isLoading, setIsLoading] = React.useState(false);
+
+  React.useEffect(() => {
+    if (!client || !siteUrl?.trim()) {
+      setTitle(null);
+      setIsLoading(false);
+      return undefined;
+    }
+
+    let cancelled = false;
+    setIsLoading(true);
+
+    client.getSiteTitle(siteUrl.trim())
+      .then(result => { if (!cancelled) setTitle(result); })
+      .catch(() => { if (!cancelled) setTitle(null); })
+      .finally(() => { if (!cancelled) setIsLoading(false); });
+
+    return () => { cancelled = true; };
+  }, [client, siteUrl]);
+
+  return { title, isLoading };
+}