show edit button only if currentUser is present and don't updateArticle if currentUser is not present

src/blog/components/Article/ArticleView.tsx

@@ -6,6 +6,7 @@ import ArrowBackRoundedIcon from '@mui/icons-material/ArrowBackRounded';
 import EditRoundedIcon from '@mui/icons-material/EditRounded';
 import { ArticleMeta } from "../ArticleMeta";
 import { ArticleProps } from '../../types/props';
+import {useAuth} from "../../providers/Author";
 
 const ArticleContainer = styled(Box)(({ theme }) => ({
   maxWidth: '800px',
@@ -30,6 +31,7 @@ export default function ArticleView({
   onEdit,
 }: ArticleProps) {
 
+  const { currentUser } = useAuth();
   return (
     <ArticleContainer>
       <IconButton onClick={onBack} sx={{ mb: 2 }}>
@@ -43,9 +45,11 @@ export default function ArticleView({
         sx={{ mb: 2, textTransform: 'uppercase', fontWeight: 500 }}
       />
 
-      <IconButton onClick={onEdit} sx={{ mb: 2 }}>
-        <EditRoundedIcon />
-      </IconButton>
+      {currentUser && (
+        <IconButton onClick={onEdit} sx={{ mb: 2 }}>
+          <EditRoundedIcon />
+        </IconButton>
+      )}
 
       <Typography variant="h3" component="h1" gutterBottom fontWeight="bold">
         {article.title}

src/blog/providers/Article.tsx

@@ -66,6 +66,10 @@ export const ArticleProvider: React.FC<{ children: React.ReactNode }> = ({ child
       console.error('updateArticle called without _id');
       return;
     }
+    if (!currentUser) {
+      console.error('updateArticle called without logged in user');
+      return;
+    }
 
     const normalizedArticleData = normalizeArticleForApi(articleData);
     try {