Better handle datetime

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/schema/event.ex

@@ -181,6 +181,9 @@ defmodule MobilizonWeb.Schema.EventType do
     field(:show_participation_price, :boolean,
       description: "Whether or not to show the participation price"
     )
+
+    field(:show_start_time, :boolean, description: "Show event start time")
+    field(:show_end_time, :boolean, description: "Show event end time")
   end
 
   input_object :event_options_input do
@@ -214,6 +217,9 @@ defmodule MobilizonWeb.Schema.EventType do
     field(:show_participation_price, :boolean,
       description: "Whether or not to show the participation price"
     )
+
+    field(:show_start_time, :boolean, description: "Show event start time")
+    field(:show_end_time, :boolean, description: "Show event end time")
   end
 
   object :event_queries do

lib/mobilizon_web/templates/email/event_updated.html.eex

@@ -76,7 +76,7 @@
                         </td>
                       </tr>
                     <% end %>
-                    <%= if MapSet.member?(@changes, :ends_on) do %>
+                    <%= if MapSet.member?(@changes, :ends_on) && !is_nil(@event.ends_on) do %>
                       <tr>
                         <td bgcolor="#ffffff" align="left">
                           <%= gettext "Ending of event" %>

lib/mobilizon_web/templates/email/event_updated.text.eex

@@ -12,7 +12,7 @@
     <%= gettext "New date and time for start of event: %{begins_on}", begins_on: datetime_to_string(@event.begins_on, @locale) %>
 <% end %>
 
-<%= if MapSet.member?(@changes, :ends_on) do %>
+<%= if MapSet.member?(@changes, :ends_on) && !is_nil(@event.ends_on) do %>
     <%= gettext "New date and time for ending of event: %{ends_on}", ends_on: datetime_to_string(@event.ends_on, @locale) %>
 <% end %>