First

1 files changed, 102 insertions, 0 deletions

diff --git a/lib/pleroma/web/mastodon_api/views/poll_view.ex b/lib/pleroma/web/mastodon_api/views/poll_view.ex
new file mode 100644
index 0000000..34e2387
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/views/poll_view.ex
@@ -0,0 +1,102 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.PollView do
+  use Pleroma.Web, :view
+
+  alias Pleroma.Web.CommonAPI.Utils
+
+  def render("show.json", %{object: object, multiple: multiple, options: options} = params) do
+    {end_time, expired} = end_time_and_expired(object)
+    {options, votes_count} = options_and_votes_count(options)
+
+    poll = %{
+      # Mastodon uses separate ids for polls, but an object can't have
+      # more than one poll embedded so object id is fine
+      id: to_string(object.id),
+      expires_at: end_time,
+      expired: expired,
+      multiple: multiple,
+      votes_count: votes_count,
+      voters_count: voters_count(object),
+      options: options,
+      emojis: Pleroma.Web.MastodonAPI.StatusView.build_emojis(object.data["emoji"])
+    }
+
+    if params[:for] do
+      # when unauthenticated Mastodon doesn't include `voted` & `own_votes` keys in response
+      {voted, own_votes} = voted_and_own_votes(params, options)
+      Map.merge(poll, %{voted: voted, own_votes: own_votes})
+    else
+      poll
+    end
+  end
+
+  def render("show.json", %{object: object} = params) do
+    case object.data do
+      %{"anyOf" => [_ | _] = options} ->
+        render(__MODULE__, "show.json", Map.merge(params, %{multiple: true, options: options}))
+
+      %{"oneOf" => [_ | _] = options} ->
+        render(__MODULE__, "show.json", Map.merge(params, %{multiple: false, options: options}))
+
+      _ ->
+        nil
+    end
+  end
+
+  defp end_time_and_expired(object) do
+    if object.data["closed"] do
+      end_time = NaiveDateTime.from_iso8601!(object.data["closed"])
+      expired = NaiveDateTime.compare(end_time, NaiveDateTime.utc_now()) == :lt
+
+      {Utils.to_masto_date(end_time), expired}
+    else
+      {nil, false}
+    end
+  end
+
+  defp options_and_votes_count(options) do
+    Enum.map_reduce(options, 0, fn %{"name" => name} = option, count ->
+      current_count = option["replies"]["totalItems"] || 0
+
+      {%{
+         title: name,
+         votes_count: current_count
+       }, current_count + count}
+    end)
+  end
+
+  defp voters_count(%{data: %{"voters" => [_ | _] = voters}}) do
+    length(voters)
+  end
+
+  defp voters_count(_), do: 0
+
+  defp voted_and_own_votes(%{object: object} = params, options) do
+    if params[:for] do
+      existing_votes =
+        Pleroma.Web.ActivityPub.Utils.get_existing_votes(params[:for].ap_id, object)
+
+      voted = existing_votes != [] or params[:for].ap_id == object.data["actor"]
+
+      own_votes =
+        if voted do
+          titles = Enum.map(options, & &1[:title])
+
+          Enum.reduce(existing_votes, [], fn vote, acc ->
+            data = vote |> Map.get(:object) |> Map.get(:data)
+            index = Enum.find_index(titles, &(&1 == data["name"]))
+            [index | acc]
+          end)
+        else
+          []
+        end
+
+      {voted, own_votes}
+    else
+      {false, []}
+    end
+  end
+end