implemented page view for freely available wiki pages

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/App.svelte

@@ -35,6 +35,7 @@
     import ViewTask    from "./routes/task/View.svelte";
     import WikiIndex   from "./routes/wiki/Index.svelte";
     import WikiPage    from "./routes/wiki/View.svelte"
+    import WikiGuest   from "./routes/wiki/GuestView.svelte"
 
     let translations_ready = $state(false);
 
@@ -102,7 +103,7 @@
         <Router>
             <Route path="/user/reset/pw"  component={ResetPw} />
             <Route path="/oidc_callback"  component={Callback} />
-            <Route path="/wiki/:key/view" component={WikiPage} />
+            <Route path="/wiki/:key/view" component={WikiGuest} />
             <Route>
                 <Login />
             </Route>

frontend/src/routes/wiki/GuestView.svelte

@@ -0,0 +1,51 @@
+<script>
+    import { onMount }       from 'svelte';
+    import { useTinyRouter } from 'svelte-tiny-router';
+    import { api }           from '../../urls.svelte';
+    import { t }             from '../../translations.svelte';
+
+    let { key } = $props();
+
+
+    let error = $state(null);
+    let page = $state(null);
+    let router = useTinyRouter();
+
+    async function loadContent(res){
+        if (res.ok){
+            page  = null;
+            page  = await res.json();
+            error = null;
+            return true;
+        } else {
+            error = await res.text();
+            return false;
+        }
+    }
+
+    async function loadPage(){
+        const url = api(`wiki/page/${key}`);
+        const res = await fetch(url,{credentials:'include'});
+        loadContent(res);
+    }
+
+    function onclick(e){
+        e.preventDefault();
+        let href = e.target.getAttribute('href');
+        if (href) router.navigate(href);
+        return false;
+    }
+
+    $effect(loadPage);
+</script>
+{#if error}
+<span class="error">{error}</span>
+{/if}
+{#if page}
+<div class="wiki page">
+    <h2>{page.title}</h2>
+    <div class="markdown">
+        {@html page.content.rendered}
+    </div>
+</div>
+{/if}

wiki/src/main/java/de/srsoftware/umbrella/wiki/WikiModule.java

@@ -70,11 +70,16 @@ public class WikiModule extends BaseHandler implements WikiService {
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
 			var user = userService().loadUser(token);
-			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
+			if (user.isEmpty()) {
+				return switch (head){
+					case PAGE -> getPage(path, null, ex);
+					case null, default -> unauthorized(ex);
+				};
+			}
 			return switch (head) {
 				case null -> getUserPages(user.get(),ex);
-		                case AVAILABLE -> getAvailability(path,ex);
+				case AVAILABLE -> getAvailability(path,ex);
 				case PAGE -> getPage(path, user.get(), ex);
 				default -> super.doGet(path,ex);
 			};
@@ -143,7 +148,8 @@ public class WikiModule extends BaseHandler implements WikiService {
 			}
 		}
 		var page = loadPage(id,version);
-		var permission = page.members().get(user.id());
+		var userId = user == null ? 0 : user.id();
+		var permission = page.members().get(userId);
 		if (permission == null) throw forbidden("You are not allowed to access \"{0}\"!",id);
 		return sendContent(ex, page);
 	}