Added some error handling

public/calendarwebapp.css

@@ -0,0 +1,3 @@
+.error {
+    color: red;
+}

source/app.d

@@ -5,6 +5,7 @@ shared static this()
 {
     auto router = new URLRouter;
     router.registerWebInterface(new CalendarWebapp);
+    router.get("*", serveStaticFiles("public"));
 
     auto settings = new HTTPServerSettings;
     settings.port = 8080;

source/calendarwebapp.d

@@ -43,15 +43,49 @@ private:
     mixin PrivateAccessProxy;
 
 public:
+    @auth void index(string userName)
+    {
+        auto entries = getEntriesFromFile(fileName);
+        render!("showevents.dt", entries);
+    }
 
-    @auth @method(HTTPMethod.POST) @path("/event/create")
-    void createEvent(Date begin, Nullable!Date end, string description,
-            string name, EventType type, bool shout, string userName)
+    void getLogin(string _error = null)
+    {
+        render!("login.dt", _error);
+    }
+
+    @errorDisplay!getLogin void postLogin(string username, string password)
+    {
+        import std.uuid : randomUUID;
+
+        enforce(username == "foo" && password == "bar", "Benutzername oder Passwort ungültig");
+        UserData d;
+        d.loggedIn = true;
+        d.name = username;
+        d.uuid = randomUUID.toString;
+        user = d;
+        redirect("/");
+    }
+
+    void getLogout()
+    {
+        terminateSession();
+        redirect("/");
+    }
+
+    @auth void getCreate(string userName, ValidationErrorData _error = ValidationErrorData.init)
+    {
+        render!("create.dt", _error);
+    }
+
+    @auth @errorDisplay!getCreate void postCreate(Date begin, Nullable!Date end,
+            string description, string name, EventType type, bool shout, string userName)
     {
         import std.array : split, replace;
 
         if (!end.isNull)
-            enforce(end - begin >= 1.days);
+            enforce(end - begin >= 1.days,
+                    "Mehrtägige Ereignisse müssen mindestens einen Tag dauern");
 
         auto entry = Entry(begin, end, Event("", name,
                 description.replace("\r", "").split('\n'), type, shout));
@@ -61,33 +95,10 @@ public:
         render!("showevents.dt", entries);
     }
 
-    @auth @method(HTTPMethod.GET) @path("create")
-    void newEvent(string userName)
+    struct ValidationErrorData
     {
-        render!("create.dt");
+        string msg;
+        string field;
     }
 
-    @auth void index(string userName)
-    {
-        auto entries = getEntriesFromFile(fileName);
-        render!("showevents.dt", entries);
-    }
-
-    void getLogin()
-    {
-        render!("login.dt");
-    }
-
-    void postLogin(string username, string password)
-    {
-        import std.uuid : randomUUID;
-
-        enforce(username == "foo" && password == "bar", "Invalid username / password");
-        UserData d;
-        d.loggedIn = true;
-        d.name = username;
-        d.uuid = randomUUID.toString;
-        user = d;
-        redirect("/");
-    }
 }

views/create.dt

@@ -1,7 +1,10 @@
 extends layout
 block content
-	form(action="/event/create", method="post")
-		fieldset(name="orderFields")
+	- void showerror(string field = null)
+		- if (_error.msg && _error.field == field)
+			td.error= _error.msg
+	form(action="/create", method="post")
+		fieldset(name="eventFields")
 			table
 				tbody#fieldTable
 					tr
@@ -9,21 +12,25 @@ block content
 							label(for="name") Ereignisname
 						td
 							input#name(value="", name="name", type="text")
+						- showerror("name");
 					tr
 						td
 							label(for="description") Beschreibung
 						td
 							textarea#description(value="", name="description", cols="40", rows="5")
+						- showerror("description");
 					tr
 						td
 							label(for="begin") Von
 						td
 							input#begin(value="", name="begin", type="date")
+						- showerror("begin");
 					tr
 						td
 							label(for="end") Bis
 						td
 							input#end(value="", name="end", type="date")
+						- showerror("end");
 					tr
 						td
 							label(for="type") Typ
@@ -34,13 +41,17 @@ block content
 								option(value="FSI_Event") FSI Ereignis
 								option(value="General_University_Event") Allgemeines Universitäts Ereignis
 								option(value="Any") Sonstiges
+						- showerror("type");
 					tr
 						td
 							label(for="shout") Shout
 						td
 							input#shout(name="shout", type="checkbox")
+						- showerror("shout");
 
 				tfoot
 					tr
 						td(colspan="2")
 							input#submitButton(type="submit", value="Ereignis erstellen")
+	- if (_error.msg && _error.field == "")
+		p.error= _error.msg

views/layout.dt

@@ -3,6 +3,7 @@ html
 	head
 		meta(charset='utf-8')
 		title Calendar Webapp
+		link(rel='stylesheet', type='text/css', href='/calendarwebapp.css')
 	body
 		block navigation
 			include navigation

views/login.dt

@@ -19,3 +19,5 @@ block content
 					tr
 						td(colspan="2")
 							input#submitButton(type="submit", value="Anmelden")
+	- if (_error)
+		p.error= _error

views/navigation.dt

@@ -3,4 +3,6 @@ nav
 		li
 			a(href='/') Home
 		li
-			a(href='/create') Create Event
+			a(href='/create') Ereignis erstellen 
+		li
+			a(href='/logout') Ausloggen