# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only

defmodule Pleroma.NotificationTest do
  use Pleroma.DataCase, async: false

  import Pleroma.Factory

  alias Pleroma.FollowingRelationship
  alias Pleroma.Notification
  alias Pleroma.Repo
  alias Pleroma.Tests.ObanHelpers
  alias Pleroma.User
  alias Pleroma.Web.ActivityPub.ActivityPub
  alias Pleroma.Web.ActivityPub.Builder
  alias Pleroma.Web.ActivityPub.Transmogrifier
  alias Pleroma.Web.CommonAPI
  alias Pleroma.Web.MastodonAPI.NotificationView

  setup do
    Mox.stub_with(Pleroma.UnstubbedConfigMock, Pleroma.Config)
    :ok
  end

  describe "create_notifications" do
    test "never returns nil" do
      user = insert(:user)
      other_user = insert(:user, %{invisible: true})

      {:ok, activity} = CommonAPI.post(user, %{status: "yeah"})
      {:ok, activity} = CommonAPI.react_with_emoji(activity.id, other_user, "☕")

      refute {:ok, [nil]} == Notification.create_notifications(activity)
    end

    test "creates a report notification only for privileged users" do
      reporting_user = insert(:user)
      reported_user = insert(:user)
      moderator_user = insert(:user, is_moderator: true)

      clear_config([:instance, :moderator_privileges], [])
      {:ok, activity1} = CommonAPI.report(reporting_user, %{account_id: reported_user.id})
      {:ok, []} = Notification.create_notifications(activity1)

      clear_config([:instance, :moderator_privileges], [:reports_manage_reports])
      {:ok, activity2} = CommonAPI.report(reporting_user, %{account_id: reported_user.id})
      {:ok, [notification]} = Notification.create_notifications(activity2)

      assert notification.user_id == moderator_user.id
      assert notification.type == "pleroma:report"
    end

    test "suppresses notifications for own reports" do
      clear_config([:instance, :admin_privileges], [:reports_manage_reports])

      reporting_admin = insert(:user, is_admin: true)
      reported_user = insert(:user)
      other_admin = insert(:user, is_admin: true)

      {:ok, activity} = CommonAPI.report(reporting_admin, %{account_id: reported_user.id})

      {:ok, [notification]} = Notification.create_notifications(activity)

      refute notification.user_id == reporting_admin.id
      assert notification.user_id == other_admin.id
      assert notification.type == "pleroma:report"
    end

    test "creates a notification for an emoji reaction" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "yeah"})
      {:ok, activity} = CommonAPI.react_with_emoji(activity.id, other_user, "☕")

      {:ok, [notification]} = Notification.create_notifications(activity)

      assert notification.user_id == user.id
      assert notification.type == "pleroma:emoji_reaction"
    end

    test "notifies someone when they are directly addressed" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)

      {:ok, activity} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname} and @#{third_user.nickname}"
        })

      {:ok, [notification, other_notification]} = Notification.create_notifications(activity)

      notified_ids = Enum.sort([notification.user_id, other_notification.user_id])
      assert notified_ids == [other_user.id, third_user.id]
      assert notification.activity_id == activity.id
      assert notification.type == "mention"
      assert other_notification.activity_id == activity.id

      assert [%Pleroma.Marker{unread_count: 2}] =
               Pleroma.Marker.get_markers(other_user, ["notifications"])
    end

    test "it creates a notification for subscribed users" do
      user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, user)

      {:ok, status} = CommonAPI.post(user, %{status: "Akariiiin"})
      {:ok, [notification]} = Notification.create_notifications(status)

      assert notification.user_id == subscriber.id
      assert notification.type == "status"
    end

    test "does not create a notification for subscribed users if status is a reply" do
      user = insert(:user)
      other_user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, other_user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      {:ok, _reply_activity} =
        CommonAPI.post(other_user, %{
          status: "test reply",
          in_reply_to_status_id: activity.id
        })

      user_notifications = Notification.for_user(user)
      assert length(user_notifications) == 1

      subscriber_notifications = Notification.for_user(subscriber)
      assert Enum.empty?(subscriber_notifications)
    end

    test "does not create subscriber notification if mentioned" do
      user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, user)

      {:ok, status} = CommonAPI.post(user, %{status: "mentioning @#{subscriber.nickname}"})
      {:ok, [notification] = notifications} = Notification.create_notifications(status)

      assert length(notifications) == 1

      assert notification.user_id == subscriber.id
      assert notification.type == "mention"
    end

    test "it sends edited notifications to those who repeated a status" do
      user = insert(:user)
      repeated_user = insert(:user)
      other_user = insert(:user)

      {:ok, activity_one} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, _activity_two} = CommonAPI.repeat(activity_one.id, repeated_user)

      {:ok, _edit_activity} =
        CommonAPI.update(user, activity_one, %{
          status: "hey @#{other_user.nickname}! mew mew"
        })

      assert [%{type: "reblog"}] = Notification.for_user(user)
      assert [%{type: "update"}] = Notification.for_user(repeated_user)
      assert [%{type: "mention"}] = Notification.for_user(other_user)
    end
  end

  test "create_poll_notifications/1" do
    [user1, user2, user3, _, _] = insert_list(5, :user)
    question = insert(:question, user: user1)
    activity = insert(:question_activity, question: question)

    {:ok, _, _} = CommonAPI.vote(user2, question, [0])
    {:ok, _, _} = CommonAPI.vote(user3, question, [1])

    {:ok, notifications} = Notification.create_poll_notifications(activity)

    assert [user2.id, user3.id, user1.id] == Enum.map(notifications, & &1.user_id)
  end

  describe "create_notification" do
    test "it disables notifications from strangers" do
      follower = insert(:user)

      followed =
        insert(:user,
          notification_settings: %Pleroma.User.NotificationSetting{block_from_strangers: true}
        )

      {:ok, activity} = CommonAPI.post(follower, %{status: "hey @#{followed.nickname}"})
      refute Notification.create_notification(activity, followed)
    end

    test "it disables notifications from non-followees" do
      follower = insert(:user)

      followed =
        insert(:user,
          notification_settings: %Pleroma.User.NotificationSetting{block_from_strangers: true}
        )

      CommonAPI.follow(follower, followed)
      {:ok, activity} = CommonAPI.post(follower, %{status: "hey @#{followed.nickname}"})
      refute Notification.create_notification(activity, followed)
    end

    test "it allows notifications from followees" do
      poster = insert(:user)

      receiver =
        insert(:user,
          notification_settings: %Pleroma.User.NotificationSetting{block_from_strangers: true}
        )

      CommonAPI.follow(receiver, poster)
      {:ok, activity} = CommonAPI.post(poster, %{status: "hey @#{receiver.nickname}"})
      assert Notification.create_notification(activity, receiver)
    end

    test "it doesn't create a notification for user if he is the activity author" do
      activity = insert(:note_activity)
      author = User.get_cached_by_ap_id(activity.data["actor"])

      refute Notification.create_notification(activity, author)
    end

    test "it doesn't create duplicate notifications for follow+subscribed users" do
      user = insert(:user)
      subscriber = insert(:user)

      {:ok, _, _, _} = CommonAPI.follow(subscriber, user)
      User.subscribe(subscriber, user)
      {:ok, status} = CommonAPI.post(user, %{status: "Akariiiin"})
      {:ok, [_notif]} = Notification.create_notifications(status)
    end

    test "it doesn't create subscription notifications if the recipient cannot see the status" do
      user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, user)

      {:ok, status} = CommonAPI.post(user, %{status: "inwisible", visibility: "direct"})

      assert {:ok, []} == Notification.create_notifications(status)
    end

    test "it disables notifications from people who are invisible" do
      author = insert(:user, invisible: true)
      user = insert(:user)

      {:ok, status} = CommonAPI.post(author, %{status: "hey @#{user.nickname}"})
      refute Notification.create_notification(status, user)
    end

    test "it doesn't create notifications if content matches with an irreversible filter" do
      user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, user)
      insert(:filter, user: subscriber, phrase: "cofe", hide: true)

      {:ok, status} = CommonAPI.post(user, %{status: "got cofe?"})

      assert {:ok, []} == Notification.create_notifications(status)
    end

    test "it creates notifications if content matches with a not irreversible filter" do
      user = insert(:user)
      subscriber = insert(:user)

      User.subscribe(subscriber, user)
      insert(:filter, user: subscriber, phrase: "cofe", hide: false)

      {:ok, status} = CommonAPI.post(user, %{status: "got cofe?"})
      {:ok, [notification]} = Notification.create_notifications(status)

      assert notification
      refute notification.seen
    end

    test "it creates notifications when someone likes user's status with a filtered word" do
      user = insert(:user)
      other_user = insert(:user)
      insert(:filter, user: user, phrase: "tesla", hide: true)

      {:ok, activity_one} = CommonAPI.post(user, %{status: "wow tesla"})
      {:ok, activity_two} = CommonAPI.favorite(other_user, activity_one.id)

      {:ok, [notification]} = Notification.create_notifications(activity_two)

      assert notification
      refute notification.seen
    end
  end

  describe "follow / follow_request notifications" do
    test "it creates `follow` notification for approved Follow activity" do
      user = insert(:user)
      followed_user = insert(:user, is_locked: false)

      {:ok, _, _, _activity} = CommonAPI.follow(user, followed_user)
      assert FollowingRelationship.following?(user, followed_user)
      assert [notification] = Notification.for_user(followed_user)

      assert %{type: "follow"} =
               NotificationView.render("show.json", %{
                 notification: notification,
                 for: followed_user
               })
    end

    test "it creates `follow_request` notification for pending Follow activity" do
      user = insert(:user)
      followed_user = insert(:user, is_locked: true)

      {:ok, _, _, _activity} = CommonAPI.follow(user, followed_user)
      refute FollowingRelationship.following?(user, followed_user)
      assert [notification] = Notification.for_user(followed_user)

      render_opts = %{notification: notification, for: followed_user}
      assert %{type: "follow_request"} = NotificationView.render("show.json", render_opts)

      # After request is accepted, the same notification is rendered with type "follow":
      assert {:ok, _} = CommonAPI.accept_follow_request(user, followed_user)

      notification =
        Repo.get(Notification, notification.id)
        |> Repo.preload(:activity)

      assert %{type: "follow"} =
               NotificationView.render("show.json", notification: notification, for: followed_user)
    end

    test "it doesn't create a notification for follow-unfollow-follow chains" do
      user = insert(:user)
      followed_user = insert(:user, is_locked: false)

      {:ok, _, _, _activity} = CommonAPI.follow(user, followed_user)
      assert FollowingRelationship.following?(user, followed_user)
      assert [notification] = Notification.for_user(followed_user)

      CommonAPI.unfollow(user, followed_user)
      {:ok, _, _, _activity_dupe} = CommonAPI.follow(user, followed_user)

      notification_id = notification.id
      assert [%{id: ^notification_id}] = Notification.for_user(followed_user)
    end

    test "dismisses the notification on follow request rejection" do
      user = insert(:user, is_locked: true)
      follower = insert(:user)
      {:ok, _, _, _follow_activity} = CommonAPI.follow(follower, user)
      assert [_notification] = Notification.for_user(user)
      {:ok, _follower} = CommonAPI.reject_follow_request(follower, user)
      assert [] = Notification.for_user(user)
    end
  end

  describe "get notification" do
    test "it gets a notification that belongs to the user" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}"})

      {:ok, [notification]} = Notification.create_notifications(activity)
      {:ok, notification} = Notification.get(other_user, notification.id)

      assert notification.user_id == other_user.id
    end

    test "it returns error if the notification doesn't belong to the user" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}"})

      {:ok, [notification]} = Notification.create_notifications(activity)
      {:error, _notification} = Notification.get(user, notification.id)
    end
  end

  describe "dismiss notification" do
    test "it dismisses a notification that belongs to the user" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}"})

      {:ok, [notification]} = Notification.create_notifications(activity)
      {:ok, notification} = Notification.dismiss(other_user, notification.id)

      assert notification.user_id == other_user.id
    end

    test "it returns error if the notification doesn't belong to the user" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}"})

      {:ok, [notification]} = Notification.create_notifications(activity)
      {:error, _notification} = Notification.dismiss(user, notification.id)
    end
  end

  describe "clear notification" do
    test "it clears all notifications belonging to the user" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)

      {:ok, activity} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname} and @#{third_user.nickname} !"
        })

      {:ok, _notifs} = Notification.create_notifications(activity)

      {:ok, activity} =
        CommonAPI.post(user, %{
          status: "hey again @#{other_user.nickname} and @#{third_user.nickname} !"
        })

      {:ok, _notifs} = Notification.create_notifications(activity)
      Notification.clear(other_user)

      assert Notification.for_user(other_user) == []
      assert Notification.for_user(third_user) != []
    end
  end

  describe "set_read_up_to()" do
    test "it sets all notifications as read up to a specified notification ID" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, _activity} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, _activity} =
        CommonAPI.post(user, %{
          status: "hey again @#{other_user.nickname}!"
        })

      [n2, n1] = Notification.for_user(other_user)

      assert n2.id > n1.id

      {:ok, _activity} =
        CommonAPI.post(user, %{
          status: "hey yet again @#{other_user.nickname}!"
        })

      Notification.set_read_up_to(other_user, n2.id)

      [n3, n2, n1] = Notification.for_user(other_user)

      assert n1.seen == true
      assert n2.seen == true
      assert n3.seen == false

      assert %Pleroma.Marker{} =
               m =
               Pleroma.Repo.get_by(
                 Pleroma.Marker,
                 user_id: other_user.id,
                 timeline: "notifications"
               )

      assert m.last_read_id == to_string(n2.id)
    end
  end

  describe "for_user_since/2" do
    defp days_ago(days) do
      NaiveDateTime.add(
        NaiveDateTime.truncate(NaiveDateTime.utc_now(), :second),
        -days * 60 * 60 * 24,
        :second
      )
    end

    test "Returns recent notifications" do
      user1 = insert(:user)
      user2 = insert(:user)

      Enum.each(0..10, fn i ->
        {:ok, _activity} =
          CommonAPI.post(user1, %{
            status: "hey ##{i} @#{user2.nickname}!"
          })
      end)

      {old, new} = Enum.split(Notification.for_user(user2), 5)

      Enum.each(old, fn notification ->
        notification
        |> cast(%{updated_at: days_ago(10)}, [:updated_at])
        |> Pleroma.Repo.update!()
      end)

      recent_notifications_ids =
        user2
        |> Notification.for_user_since(
          NaiveDateTime.add(NaiveDateTime.utc_now(), -5 * 86_400, :second)
        )
        |> Enum.map(& &1.id)

      Enum.each(old, fn %{id: id} ->
        refute id in recent_notifications_ids
      end)

      Enum.each(new, fn %{id: id} ->
        assert id in recent_notifications_ids
      end)
    end
  end

  describe "notification target determination / get_notified_from_activity/2" do
    test "it sends notifications to addressed users in new messages" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert other_user in enabled_receivers
    end

    test "it sends notifications to mentioned users in new messages" do
      user = insert(:user)
      other_user = insert(:user)

      create_activity = %{
        "@context" => "https://www.w3.org/ns/activitystreams",
        "type" => "Create",
        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
        "actor" => user.ap_id,
        "object" => %{
          "type" => "Note",
          "id" => Pleroma.Web.ActivityPub.Utils.generate_object_id(),
          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
          "content" => "message with a Mention tag, but no explicit tagging",
          "tag" => [
            %{
              "type" => "Mention",
              "href" => other_user.ap_id,
              "name" => other_user.nickname
            }
          ],
          "attributedTo" => user.ap_id
        }
      }

      {:ok, activity} = Transmogrifier.handle_incoming(create_activity)

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert other_user in enabled_receivers
    end

    test "it does not send notifications to users who are only cc in new messages" do
      user = insert(:user)
      other_user = insert(:user)

      create_activity = %{
        "@context" => "https://www.w3.org/ns/activitystreams",
        "type" => "Create",
        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
        "cc" => [other_user.ap_id],
        "actor" => user.ap_id,
        "object" => %{
          "type" => "Note",
          "id" => Pleroma.Web.ActivityPub.Utils.generate_object_id(),
          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
          "cc" => [other_user.ap_id],
          "content" => "hi everyone",
          "attributedTo" => user.ap_id
        }
      }

      {:ok, activity} = Transmogrifier.handle_incoming(create_activity)

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert other_user not in enabled_receivers
    end

    test "it does not send notification to mentioned users in likes" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)

      {:ok, activity_one} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, activity_two} = CommonAPI.favorite(third_user, activity_one.id)

      enabled_receivers = Notification.get_notified_from_activity(activity_two)

      assert other_user not in enabled_receivers
    end

    test "it only notifies the post's author in likes" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)

      {:ok, activity_one} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, like_data, _} = Builder.like(third_user, activity_one.object)

      {:ok, like, _} =
        like_data
        |> Map.put("to", [other_user.ap_id | like_data["to"]])
        |> ActivityPub.persist(local: true)

      enabled_receivers = Notification.get_notified_from_activity(like)

      assert other_user not in enabled_receivers
    end

    test "it does not send notification to mentioned users in announces" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)

      {:ok, activity_one} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, activity_two} = CommonAPI.repeat(activity_one.id, third_user)

      enabled_receivers = Notification.get_notified_from_activity(activity_two)

      assert other_user not in enabled_receivers
    end

    test "it does not return blocking recipient in recipients list" do
      user = insert(:user)
      other_user = insert(:user)
      {:ok, _user_relationship} = User.block(other_user, user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}!"})

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert [] == enabled_receivers
    end

    test "it does not return notification-muting recipient in recipients list" do
      user = insert(:user)
      other_user = insert(:user)
      {:ok, _user_relationships} = User.mute(other_user, user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}!"})

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert [] == enabled_receivers
    end

    test "it does not return thread-muting recipient in recipients list" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}!"})

      {:ok, _} = CommonAPI.add_mute(other_user, activity)

      {:ok, same_context_activity} =
        CommonAPI.post(user, %{
          status: "hey-hey-hey @#{other_user.nickname}!",
          in_reply_to_status_id: activity.id
        })

      enabled_receivers = Notification.get_notified_from_activity(same_context_activity)

      refute other_user in enabled_receivers
    end

    test "it does not return non-following domain-blocking recipient in recipients list" do
      blocked_domain = "blocked.domain"
      user = insert(:user, %{ap_id: "https://#{blocked_domain}/@actor"})
      other_user = insert(:user)

      {:ok, other_user} = User.block_domain(other_user, blocked_domain)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}!"})

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert [] == enabled_receivers
    end

    test "it returns following domain-blocking recipient in enabled recipients list" do
      blocked_domain = "blocked.domain"
      user = insert(:user, %{ap_id: "https://#{blocked_domain}/@actor"})
      other_user = insert(:user)

      {:ok, other_user} = User.block_domain(other_user, blocked_domain)
      {:ok, other_user, user} = User.follow(other_user, user)

      {:ok, activity} = CommonAPI.post(user, %{status: "hey @#{other_user.nickname}!"})

      enabled_receivers = Notification.get_notified_from_activity(activity)

      assert [other_user] == enabled_receivers
    end

    test "it sends edited notifications to those who repeated a status" do
      user = insert(:user)
      repeated_user = insert(:user)
      other_user = insert(:user)

      {:ok, activity_one} =
        CommonAPI.post(user, %{
          status: "hey @#{other_user.nickname}!"
        })

      {:ok, _activity_two} = CommonAPI.repeat(activity_one.id, repeated_user)

      {:ok, edit_activity} =
        CommonAPI.update(user, activity_one, %{
          status: "hey @#{other_user.nickname}! mew mew"
        })

      enabled_receivers = Notification.get_notified_from_activity(edit_activity)

      assert repeated_user in enabled_receivers
      refute other_user in enabled_receivers
    end
  end

  describe "notification lifecycle" do
    test "liking an activity results in 1 notification, then 0 if the activity is deleted" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _} = CommonAPI.favorite(other_user, activity.id)

      assert length(Notification.for_user(user)) == 1

      {:ok, _} = CommonAPI.delete(activity.id, user)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "liking an activity results in 1 notification, then 0 if the activity is unliked" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _} = CommonAPI.favorite(other_user, activity.id)

      assert length(Notification.for_user(user)) == 1

      {:ok, _} = CommonAPI.unfavorite(activity.id, other_user)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "repeating an activity results in 1 notification, then 0 if the activity is deleted" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _} = CommonAPI.repeat(activity.id, other_user)

      assert length(Notification.for_user(user)) == 1

      {:ok, _} = CommonAPI.delete(activity.id, user)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "repeating an activity results in 1 notification, then 0 if the activity is unrepeated" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _} = CommonAPI.repeat(activity.id, other_user)

      assert length(Notification.for_user(user)) == 1

      {:ok, _} = CommonAPI.unrepeat(activity.id, other_user)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "liking an activity which is already deleted does not generate a notification" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _deletion_activity} = CommonAPI.delete(activity.id, user)

      assert Enum.empty?(Notification.for_user(user))

      {:error, :not_found} = CommonAPI.favorite(other_user, activity.id)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "repeating an activity which is already deleted does not generate a notification" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})

      assert Enum.empty?(Notification.for_user(user))

      {:ok, _deletion_activity} = CommonAPI.delete(activity.id, user)

      assert Enum.empty?(Notification.for_user(user))

      {:error, _} = CommonAPI.repeat(activity.id, other_user)

      assert Enum.empty?(Notification.for_user(user))
    end

    test "replying to a deleted post without tagging does not generate a notification" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "test post"})
      {:ok, _deletion_activity} = CommonAPI.delete(activity.id, user)

      {:ok, _reply_activity} =
        CommonAPI.post(other_user, %{
          status: "test reply",
          in_reply_to_status_id: activity.id
        })

      assert Enum.empty?(Notification.for_user(user))
    end

    test "notifications are deleted if a local user is deleted" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, _activity} =
        CommonAPI.post(user, %{status: "hi @#{other_user.nickname}", visibility: "direct"})

      refute Enum.empty?(Notification.for_user(other_user))

      {:ok, job} = User.delete(user)
      ObanHelpers.perform(job)

      assert Enum.empty?(Notification.for_user(other_user))
    end

    test "notifications are deleted if a remote user is deleted" do
      remote_user = insert(:user)
      local_user = insert(:user)

      dm_message = %{
        "@context" => "https://www.w3.org/ns/activitystreams",
        "type" => "Create",
        "actor" => remote_user.ap_id,
        "id" => remote_user.ap_id <> "/activities/test",
        "to" => [local_user.ap_id],
        "cc" => [],
        "object" => %{
          "type" => "Note",
          "id" => remote_user.ap_id <> "/objects/test",
          "content" => "Hello!",
          "tag" => [
            %{
              "type" => "Mention",
              "href" => local_user.ap_id,
              "name" => "@#{local_user.nickname}"
            }
          ],
          "to" => [local_user.ap_id],
          "cc" => [],
          "attributedTo" => remote_user.ap_id
        }
      }

      {:ok, _dm_activity} = Transmogrifier.handle_incoming(dm_message)

      refute Enum.empty?(Notification.for_user(local_user))

      delete_user_message = %{
        "@context" => "https://www.w3.org/ns/activitystreams",
        "id" => remote_user.ap_id <> "/activities/delete",
        "actor" => remote_user.ap_id,
        "type" => "Delete",
        "object" => remote_user.ap_id
      }

      remote_user_url = remote_user.ap_id

      Tesla.Mock.mock(fn
        %{method: :get, url: ^remote_user_url} ->
          %Tesla.Env{status: 404, body: ""}
      end)

      {:ok, _delete_activity} = Transmogrifier.handle_incoming(delete_user_message)
      ObanHelpers.perform_all()

      assert Enum.empty?(Notification.for_user(local_user))
    end

    test "move activity generates a notification" do
      %{ap_id: old_ap_id} = old_user = insert(:user)
      %{ap_id: new_ap_id} = new_user = insert(:user, also_known_as: [old_ap_id])
      follower = insert(:user)
      other_follower = insert(:user, %{allow_following_move: false})

      User.follow(follower, old_user)
      User.follow(other_follower, old_user)

      Pleroma.Web.ActivityPub.ActivityPub.move(old_user, new_user)
      ObanHelpers.perform_all()

      assert [
               %{
                 activity: %{
                   data: %{"type" => "Move", "actor" => ^old_ap_id, "target" => ^new_ap_id}
                 }
               }
             ] = Notification.for_user(follower)

      assert [
               %{
                 activity: %{
                   data: %{"type" => "Move", "actor" => ^old_ap_id, "target" => ^new_ap_id}
                 }
               }
             ] = Notification.for_user(other_follower)
    end
  end

  describe "for_user" do
    setup do
      user = insert(:user)

      {:ok, %{user: user}}
    end

    test "it returns notifications for muted user without notifications", %{user: user} do
      muted = insert(:user)
      {:ok, _user_relationships} = User.mute(user, muted, %{notifications: false})

      {:ok, _activity} = CommonAPI.post(muted, %{status: "hey @#{user.nickname}"})

      [notification] = Notification.for_user(user)

      assert notification.activity.object
      assert notification.seen
    end

    test "it doesn't return notifications for muted user with notifications", %{user: user} do
      muted = insert(:user)
      {:ok, _user_relationships} = User.mute(user, muted)

      {:ok, _activity} = CommonAPI.post(muted, %{status: "hey @#{user.nickname}"})

      assert Notification.for_user(user) == []
    end

    test "it doesn't return notifications for blocked user", %{user: user} do
      blocked = insert(:user)
      {:ok, _user_relationship} = User.block(user, blocked)

      {:ok, _activity} = CommonAPI.post(blocked, %{status: "hey @#{user.nickname}"})

      assert Notification.for_user(user) == []
    end

    test "it doesn't return notifications for domain-blocked non-followed user", %{user: user} do
      blocked = insert(:user, ap_id: "http://some-domain.com")
      {:ok, user} = User.block_domain(user, "some-domain.com")

      {:ok, _activity} = CommonAPI.post(blocked, %{status: "hey @#{user.nickname}"})

      assert Notification.for_user(user) == []
    end

    test "it returns notifications for domain-blocked but followed user" do
      user = insert(:user)
      blocked = insert(:user, ap_id: "http://some-domain.com")

      {:ok, user} = User.block_domain(user, "some-domain.com")
      {:ok, _, _} = User.follow(user, blocked)

      {:ok, _activity} = CommonAPI.post(blocked, %{status: "hey @#{user.nickname}"})

      assert length(Notification.for_user(user)) == 1
    end

    test "it doesn't return notifications for muted thread", %{user: user} do
      another_user = insert(:user)

      {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})

      {:ok, _} = Pleroma.ThreadMute.add_mute(user.id, activity.data["context"])
      assert Notification.for_user(user) == []
    end

    test "it doesn't return notifications from a muted user when with_muted is set", %{user: user} do
      muted = insert(:user)
      {:ok, _user_relationships} = User.mute(user, muted)

      {:ok, _activity} = CommonAPI.post(muted, %{status: "hey @#{user.nickname}"})

      assert Enum.empty?(Notification.for_user(user, %{with_muted: true}))
    end

    test "it doesn't return notifications from a blocked user when with_muted is set", %{
      user: user
    } do
      blocked = insert(:user)
      {:ok, _user_relationship} = User.block(user, blocked)

      {:ok, _activity} = CommonAPI.post(blocked, %{status: "hey @#{user.nickname}"})

      assert Enum.empty?(Notification.for_user(user, %{with_muted: true}))
    end

    test "when with_muted is set, " <>
           "it doesn't return notifications from a domain-blocked non-followed user",
         %{user: user} do
      blocked = insert(:user, ap_id: "http://some-domain.com")
      {:ok, user} = User.block_domain(user, "some-domain.com")

      {:ok, _activity} = CommonAPI.post(blocked, %{status: "hey @#{user.nickname}"})

      assert Enum.empty?(Notification.for_user(user, %{with_muted: true}))
    end

    test "it returns notifications from muted threads when with_muted is set", %{user: user} do
      another_user = insert(:user)

      {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})

      {:ok, _} = Pleroma.ThreadMute.add_mute(user.id, activity.data["context"])
      assert length(Notification.for_user(user, %{with_muted: true})) == 1
    end

    test "it doesn't return notifications about mentions with filtered word", %{user: user} do
      insert(:filter, user: user, phrase: "cofe", hide: true)
      another_user = insert(:user)

      {:ok, _activity} = CommonAPI.post(another_user, %{status: "@#{user.nickname} got cofe?"})

      assert Enum.empty?(Notification.for_user(user))
    end

    test "it returns notifications about mentions with not hidden filtered word", %{user: user} do
      insert(:filter, user: user, phrase: "test", hide: false)
      another_user = insert(:user)

      {:ok, _} = CommonAPI.post(another_user, %{status: "@#{user.nickname} test"})

      assert length(Notification.for_user(user)) == 1
    end

    test "it returns notifications about favorites with filtered word", %{user: user} do
      insert(:filter, user: user, phrase: "cofe", hide: true)
      another_user = insert(:user)

      {:ok, activity} = CommonAPI.post(user, %{status: "Give me my cofe!"})
      {:ok, _} = CommonAPI.favorite(another_user, activity.id)

      assert length(Notification.for_user(user)) == 1
    end

    test "it returns notifications when related object is without content and filters are defined",
         %{user: user} do
      followed_user = insert(:user, is_locked: true)

      insert(:filter, user: followed_user, phrase: "test", hide: true)

      {:ok, _, _, _activity} = CommonAPI.follow(user, followed_user)
      refute FollowingRelationship.following?(user, followed_user)
      assert [notification] = Notification.for_user(followed_user)

      assert %{type: "follow_request"} =
               NotificationView.render("show.json", %{
                 notification: notification,
                 for: followed_user
               })

      assert {:ok, _} = CommonAPI.accept_follow_request(user, followed_user)

      assert [notification] = Notification.for_user(followed_user)

      assert %{type: "follow"} =
               NotificationView.render("show.json", %{
                 notification: notification,
                 for: followed_user
               })
    end
  end
end