Send announcement notifications to anonymous participants

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

lib/service/notifier/email.ex

@@ -51,6 +51,18 @@ defmodule Mobilizon.Service.Notifier.Email do
     end
   end
 
+  @doc """
+  Send an anonymous activity directly to an email, for anonymous participants for instance
+  """
+  @spec send_anonymous_activity(String.t(), Activity.t(), Keyword.t()) :: {:ok, :sent}
+  def send_anonymous_activity(email, %Activity{} = activity, options) do
+    email
+    |> EmailActivity.anonymous_activity(activity, options)
+    |> Mailer.send_email()
+
+    {:ok, :sent}
+  end
+
   # These notifications are using LegacyNotifierBuilder and don't have any history,
   # so we always send them directly, as long as the setting isn't none
   @always_direct_subjects [

lib/service/workers/legacy_notifier_builder.ex

@@ -6,7 +6,7 @@ defmodule Mobilizon.Service.Workers.LegacyNotifierBuilder do
   alias Mobilizon.Activities.Activity
   alias Mobilizon.{Actors, Events, Users}
   alias Mobilizon.Actors.Actor
-  alias Mobilizon.Events.Event
+  alias Mobilizon.Events.{Event, Participant}
   alias Mobilizon.Service.Notifier
 
   use Mobilizon.Service.Workers.Helper, queue: "activity"
@@ -16,6 +16,10 @@ defmodule Mobilizon.Service.Workers.LegacyNotifierBuilder do
     with {"legacy_notify", args} <- Map.pop(args, "op") do
       activity = build_activity(args)
 
+      if args["subject"] == "participation_event_comment" do
+        notify_anonymous_participants(get_in(args, ["subject_params", "event_id"]), activity)
+      end
+
       args
       |> users_to_notify(author_id: args["author_id"], group_id: Map.get(args, "group_id"))
       |> Enum.each(&Notifier.notify(&1, activity, single_activity: true))
@@ -91,4 +95,20 @@ defmodule Mobilizon.Service.Workers.LegacyNotifierBuilder do
     |> Enum.uniq()
     |> Enum.map(&Users.get_user_with_settings!/1)
   end
+
+  defp notify_anonymous_participants(nil, _activity), do: :ok
+
+  defp notify_anonymous_participants(event_id, activity) do
+    event_id
+    |> Events.list_anonymous_participants_for_event()
+    |> Enum.filter(fn %Participant{metadata: metadata} ->
+      is_map(metadata) && is_binary(metadata.email)
+    end)
+    |> Enum.map(fn %Participant{metadata: metadata} -> metadata end)
+    |> Enum.map(fn metadata ->
+      Notifier.Email.send_anonymous_activity(metadata.email, activity,
+        locale: Map.get(metadata, :locale, "en")
+      )
+    end)
+  end
 end