Merge branch 'familiar-followers' into 'develop'

Implement `/api/v1/accounts/familiar_followers`

See merge request pleroma/pleroma!4098

test/pleroma/user_test.exs

@@ -2894,6 +2894,20 @@ defmodule Pleroma.UserTest do
     end
   end
 
+  describe "get_familiar_followers/3" do
+    test "returns familiar followers for a pair of users" do
+      user1 = insert(:user)
+      %{id: id2} = user2 = insert(:user)
+      user3 = insert(:user)
+      _user4 = insert(:user)
+
+      User.follow(user1, user2)
+      User.follow(user2, user3)
+
+      assert [%{id: ^id2}] = User.get_familiar_followers(user3, user1)
+    end
+  end
+
   describe "account endorsements" do
     test "it pins people" do
       user = insert(:user)

test/pleroma/web/mastodon_api/controllers/account_controller_test.exs

@@ -2172,6 +2172,55 @@ defmodule Pleroma.Web.MastodonAPI.AccountControllerTest do
     end
   end
 
+  describe "familiar followers" do
+    setup do: oauth_access(["read:follows"])
+
+    test "fetch user familiar followers", %{user: user, conn: conn} do
+      %{id: id1} = other_user1 = insert(:user)
+      %{id: id2} = other_user2 = insert(:user)
+      _ = insert(:user)
+
+      User.follow(user, other_user1)
+      User.follow(other_user1, other_user2)
+
+      assert [%{"accounts" => [%{"id" => ^id1}], "id" => ^id2}] =
+               conn
+               |> put_req_header("content-type", "application/json")
+               |> get("/api/v1/accounts/familiar_followers?id[]=#{id2}")
+               |> json_response_and_validate_schema(200)
+    end
+
+    test "returns empty array if followers are hidden", %{user: user, conn: conn} do
+      other_user1 = insert(:user, hide_follows: true)
+      %{id: id2} = other_user2 = insert(:user)
+      _ = insert(:user)
+
+      User.follow(user, other_user1)
+      User.follow(other_user1, other_user2)
+
+      assert [%{"accounts" => [], "id" => ^id2}] =
+               conn
+               |> put_req_header("content-type", "application/json")
+               |> get("/api/v1/accounts/familiar_followers?id[]=#{id2}")
+               |> json_response_and_validate_schema(200)
+    end
+
+    test "it respects hide_followers", %{user: user, conn: conn} do
+      other_user1 = insert(:user)
+      %{id: id2} = other_user2 = insert(:user, hide_followers: true)
+      _ = insert(:user)
+
+      User.follow(user, other_user1)
+      User.follow(other_user1, other_user2)
+
+      assert [%{"accounts" => [], "id" => ^id2}] =
+               conn
+               |> put_req_header("content-type", "application/json")
+               |> get("/api/v1/accounts/familiar_followers?id[]=#{id2}")
+               |> json_response_and_validate_schema(200)
+    end
+  end
+
   describe "remove from followers" do
     setup do: oauth_access(["follow"])