v2 Suggestions: rudimentary API response

lib/pleroma/user.ex

@@ -149,6 +149,7 @@ defmodule Pleroma.User do
     field(:last_active_at, :naive_datetime)
     field(:disclose_client, :boolean, default: true)
     field(:pinned_objects, :map, default: %{})
+    field(:is_suggested, :boolean, default: false)
 
     embeds_one(
       :notification_settings,

lib/pleroma/user/query.ex

@@ -167,6 +167,10 @@ defmodule Pleroma.User.Query do
     where(query, [u], u.is_confirmed == false)
   end
 
+  defp compose_query({:is_suggested, bool}, query) do
+    where(query, [u], u.is_suggested == ^bool)
+  end
+
   defp compose_query({:followers, %User{id: id}}, query) do
     query
     |> where([u], u.id != ^id)

lib/pleroma/web/mastodon_api/controllers/suggestion_controller.ex

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Web.MastodonAPI.SuggestionController do
   use Pleroma.Web, :controller
+  alias Pleroma.User
 
   require Logger
 
@@ -29,7 +30,7 @@ defmodule Pleroma.Web.MastodonAPI.SuggestionController do
   def index2_operation do
     %OpenApiSpex.Operation{
       tags: ["Suggestions"],
-      summary: "Follow suggestions (Not implemented)",
+      summary: "Follow suggestions",
       operationId: "SuggestionController.index2",
       responses: %{
         200 => Pleroma.Web.ApiSpec.Helpers.empty_array_response()
@@ -42,6 +43,14 @@ defmodule Pleroma.Web.MastodonAPI.SuggestionController do
     do: Pleroma.Web.MastodonAPI.MastodonAPIController.empty_array(conn, params)
 
   @doc "GET /api/v2/suggestions"
-  def index2(conn, params),
-    do: Pleroma.Web.MastodonAPI.MastodonAPIController.empty_array(conn, params)
+  def index2(conn, params) do
+    limit = Map.get(params, :limit, 40) |> min(80)
+
+    users =
+      %{is_suggested: true, limit: limit}
+      |> User.Query.build()
+      |> Pleroma.Repo.all()
+
+    render(conn, "index.json", %{users: users, source: :staff, skip_visibility_check: true})
+  end
 end

lib/pleroma/web/mastodon_api/views/suggestion_view.ex

@@ -0,0 +1,28 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.SuggestionView do
+  use Pleroma.Web, :view
+  alias Pleroma.Web.MastodonAPI.AccountView
+
+  @source_types [:staff, :global, :past_interactions]
+
+  def render("index.json", %{users: users} = opts) do
+    Enum.map(users, fn user ->
+      opts =
+        opts
+        |> Map.put(:user, user)
+        |> Map.delete(:users)
+
+      render("show.json", opts)
+    end)
+  end
+
+  def render("show.json", %{source: source, user: _user} = opts) when source in @source_types do
+    %{
+      source: source,
+      account: AccountView.render("show.json", opts)
+    }
+  end
+end