Fix some nil dereferences

templates/index.template.html

@@ -55,7 +55,7 @@
                         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                             {{ .User.SchAcc }}
                         </a>
-                        <div class="dropdown-menu {{ if .User.Dark }} bg-dark {{ end }}" style="width: auto; min-width: auto" aria-labelledby="navbarDropdown">
+                        <div class="dropdown-menu {{ if $dark }} bg-dark {{ end }}" style="width: auto; min-width: auto" aria-labelledby="navbarDropdown">
                             <a class="nav-link" href="/logout" style="padding: 1em; width: auto">Log out</a>
                         </div>
                     </li>
@@ -67,7 +67,7 @@
     </nav>
 
     <div class="container" style="padding: 2em">
-        {{ if .User.SchAcc }}
+        {{ if .User }}
             <div class="input-group mb-3">
                 <div class="input-group-prepend">
                     <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" id="langbutton">
@@ -79,13 +79,13 @@
                             btn.innerText = lang;
                         }
                     </script>
-                    <div class="dropdown-menu {{ if .User.Dark }} bg-dark text-white {{ end }}">
+                    <div class="dropdown-menu {{ if $dark }} bg-dark text-white {{ end }}">
                         {{ range .Langs }}
-                            <a class="dropdown-item {{ if $.User.Dark }} text-white {{ end }}" onclick="changeLanguage({{ . }})">{{ . }} ({{ .ESpeak }})</a>
+                            <a class="dropdown-item {{ if $dark }} text-white {{ end }}" onclick="changeLanguage({{ . }})">{{ . }} ({{ .ESpeak }})</a>
                         {{ end }}
                     </div>
                 </div>
-                <input id="msg" type="text" class="form-control {{ if .User.Dark }} bg-secondary text-white {{ end }}" aria-label="Vox message">
+                <input id="msg" type="text" class="form-control {{ if $dark }} bg-secondary text-white {{ end }}" aria-label="Vox message">
                 <div class="input-group-append">
                     <button class="btn btn-primary" type="button" id="send">Küldés!</button>
                 </div>
@@ -137,8 +137,8 @@
             {{ if .Msgs }}
                 <div class="container">
                     <div class="card">
-                        <div class="card-body" {{ if .User.Dark }} style="background: #545b62" {{ end }}>
-                            <table class="table {{ if .User.Dark }} text-white {{ end }}">
+                        <div class="card-body" {{ if $dark }} style="background: #545b62" {{ end }}>
+                            <table class="table {{ if $dark }} text-white {{ end }}">
                                 <thead>
                                 <tr>
                                     <th scope="row">Idő</th>