Store user id/secret in session upon login (#61)

History table uses session's user_id instead of secret in URL.

graphs/templates/graphs/logged_in.html

@@ -16,7 +16,7 @@
     <a class="btn btn-primary" href="{% url "graphs:display_artist_graph" user_secret %}" role="button">
         Artists
     </a>
-    <a class="btn btn-primary" href="{% url "graphs:display_history_table" user_secret %}" role="button">
+    <a class="btn btn-primary" href="{% url "graphs:display_history_table" %}" role="button">
         History
     </a>
 </body>

graphs/urls.py

@@ -10,6 +10,7 @@ urlpatterns = [
         name='display_genre_graph'),
     path('audio_features/<str:user_secret>', display_features_graphs,
         name='display_audio_features'),
-    path('history/<str:user_secret>', display_history_table,
-        name='display_history_table'),
+    #  path('history/<str:user_secret>', display_history_table,
+        #  name='display_history_table'),
+    path('history/', display_history_table, name='display_history_table'),
 ]

graphs/views.py

@@ -43,14 +43,14 @@ def display_features_graphs(request, user_secret):
     return render(request, "graphs/features_graphs.html",
             get_secret_context(user_secret))
 
-def display_history_table(request, user_secret):
+def display_history_table(request):
     """Renders the user history page
 
     :param request: the HTTP request
     :param user_secret: user secret used for identification
     :return: renders the user history page
     """
-    user_id = User.objects.get(secret=user_secret).id
+    user_id = request.session['user_id']
     user_history = History.objects.filter(user__exact=user_id).order_by('-timestamp')
     history_table = HistoryTable(user_history)
     history_table.exclude = ('id', 'user', 'track', )