Add ability to delete an event

lib/mobilizon/events/events.ex

@@ -103,6 +103,16 @@ defmodule Mobilizon.Events do
   """
   def get_event!(id), do: Repo.get!(Event, id)
 
+  @doc """
+  Gets a single event.
+  """
+  def get_event(id) do
+    case Repo.get(Event, id) do
+      nil -> {:error, :event_not_found}
+      event -> {:ok, event}
+    end
+  end
+
   @doc """
   Gets an event by it's URL
   """
@@ -311,6 +321,15 @@ defmodule Mobilizon.Events do
     Repo.delete(event)
   end
 
+  @doc """
+  Deletes a Event.
+
+  Raises an exception if it fails.
+  """
+  def delete_event!(%Event{} = event) do
+    Repo.delete!(event)
+  end
+
   @doc """
   Returns an `%Ecto.Changeset{}` for tracking event changes.