Improved handling of errors and included manual refreshing

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

templates/index.html

@@ -54,11 +54,19 @@
   <header>
     <h1>Next Book</h1>
     <p>Suggestions for the next book to read from your Storygraph to-read pile</p>
+    {{ if .Refreshing }}
+      <div>Refreshing recommendations...</div>
+    {{ else if .LastUpdated }}
+      <div>
+        Last Update: {{ .LastUpdated }}
+        <a href="/refresh">Refresh recommendations</a>
+      </div>
+    {{ end }}
   </header>
-  {{ if index . "Fiction" }}
+  {{ if index .Books "Fiction" }}
     <main>
       {{ $cat := "Fiction" }}
-      {{ $book := index . $cat }}
+      {{ $book := index .Books $cat }}
       <div class="category" style="grid-column: span 4;">
         <h3>{{ $cat }}</h3>
         <a href="{{ $book.Link }}" target="_blank">
@@ -68,7 +76,7 @@
         <div class="rating">⭐ {{ $book.Rating }}</div>
       </div>
       {{ $cat := "Non-Fiction" }}
-      {{ $book := index . $cat }}
+      {{ $book := index .Books $cat }}
       <div class="category" style="grid-column: span 4;">
         <h3>{{ $cat }}</h3>
         <a href="{{ $book.Link }}" target="_blank">
@@ -78,7 +86,7 @@
         <div class="rating">⭐ {{ $book.Rating }}</div>
       </div>
       {{ $cat := "Comics" }}
-      {{ $book := index . $cat }}
+      {{ $book := index .Books $cat }}
       <div class="category" style="grid-column: span 4;">
         <h3>{{ $cat }}</h3>
         <a href="{{ $book.Link }}" target="_blank">
@@ -88,7 +96,7 @@
         <div class="rating">⭐ {{ $book.Rating }}</div>
       </div>
 
-      {{ range $cat, $book := .}}
+      {{ range $cat, $book := .Books }}
       {{ if or (eq $cat "Fiction") (eq $cat "Non-Fiction") (eq $cat "Comics") }}
         {{ continue }}
       {{ end }}