From 5102468d0f8067548ef233b5947da4bc517f5774 Mon Sep 17 00:00:00 2001
From: lain <lain@soykaf.club>
Date: Wed, 22 Apr 2020 14:06:39 +0200
Subject: [PATCH] Polls: Persist and show voters' count

---
 lib/pleroma/object.ex                           |  5 ++++-
 lib/pleroma/web/activity_pub/activity_pub.ex    |  5 +++--
 lib/pleroma/web/mastodon_api/views/poll_view.ex |  7 +++++++
 test/web/mastodon_api/views/poll_view_test.exs  | 16 ++++++++++++++--
 4 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index 9574432f0..e678fd415 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -261,7 +261,7 @@ def decrease_replies_count(ap_id) do
     end
   end
 
-  def increase_vote_count(ap_id, name) do
+  def increase_vote_count(ap_id, name, actor) do
     with %Object{} = object <- Object.normalize(ap_id),
          "Question" <- object.data["type"] do
       multiple = Map.has_key?(object.data, "anyOf")
@@ -276,12 +276,15 @@ def increase_vote_count(ap_id, name) do
             option
         end)
 
+      voters = [actor | object.data["voters"] || []] |> Enum.uniq()
+
       data =
         if multiple do
           Map.put(object.data, "anyOf", options)
         else
           Map.put(object.data, "oneOf", options)
         end
+        |> Map.put("voters", voters)
 
       object
       |> Object.change(%{data: data})
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index eedea08a2..4a133498e 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -118,9 +118,10 @@ def decrease_replies_count_if_reply(_object), do: :noop
 
   def increase_poll_votes_if_vote(%{
         "object" => %{"inReplyTo" => reply_ap_id, "name" => name},
-        "type" => "Create"
+        "type" => "Create",
+        "actor" => actor
       }) do
-    Object.increase_vote_count(reply_ap_id, name)
+    Object.increase_vote_count(reply_ap_id, name, actor)
   end
 
   def increase_poll_votes_if_vote(_create_data), do: :noop
diff --git a/lib/pleroma/web/mastodon_api/views/poll_view.ex b/lib/pleroma/web/mastodon_api/views/poll_view.ex
index 40edbb213..59a5deb28 100644
--- a/lib/pleroma/web/mastodon_api/views/poll_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/poll_view.ex
@@ -19,6 +19,7 @@ def render("show.json", %{object: object, multiple: multiple, options: options}
       expired: expired,
       multiple: multiple,
       votes_count: votes_count,
+      voters_count: (multiple || nil) && voters_count(object),
       options: options,
       voted: voted?(params),
       emojis: Pleroma.Web.MastodonAPI.StatusView.build_emojis(object.data["emoji"])
@@ -62,6 +63,12 @@ defp options_and_votes_count(options) do
     end)
   end
 
+  defp voters_count(%{data: %{"voters" => [_ | _] = voters}}) do
+    length(voters)
+  end
+
+  defp voters_count(_), do: 0
+
   defp voted?(%{object: object} = opts) do
     if opts[:for] do
       existing_votes = Pleroma.Web.ActivityPub.Utils.get_existing_votes(opts[:for].ap_id, object)
diff --git a/test/web/mastodon_api/views/poll_view_test.exs b/test/web/mastodon_api/views/poll_view_test.exs
index 6211fa888..63b204387 100644
--- a/test/web/mastodon_api/views/poll_view_test.exs
+++ b/test/web/mastodon_api/views/poll_view_test.exs
@@ -43,7 +43,8 @@ test "renders a poll" do
         %{title: "why are you even asking?", votes_count: 0}
       ],
       voted: false,
-      votes_count: 0
+      votes_count: 0,
+      voters_count: nil
     }
 
     result = PollView.render("show.json", %{object: object})
@@ -69,9 +70,20 @@ test "detects if it is multiple choice" do
         }
       })
 
+    voter = insert(:user)
+
     object = Object.normalize(activity)
 
-    assert %{multiple: true} = PollView.render("show.json", %{object: object})
+    {:ok, _votes, object} = CommonAPI.vote(voter, object, [0, 1])
+
+    assert match?(
+             %{
+               multiple: true,
+               voters_count: 1,
+               votes_count: 2
+             },
+             PollView.render("show.json", %{object: object})
+           )
   end
 
   test "detects emoji" do