# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only

defmodule Pleroma.Web.ActivityPub.UtilsTest do
  use Pleroma.DataCase
  alias Pleroma.Activity
  alias Pleroma.Object
  alias Pleroma.Repo
  alias Pleroma.User
  alias Pleroma.Web.ActivityPub.ActivityPub
  alias Pleroma.Web.ActivityPub.Utils
  alias Pleroma.Web.AdminAPI.AccountView
  alias Pleroma.Web.CommonAPI

  import Pleroma.Factory

  require Pleroma.Constants

  describe "fetch the latest Follow" do
    test "fetches the latest Follow activity" do
      %Activity{data: %{"type" => "Follow"}} = activity = insert(:follow_activity)
      follower = User.get_cached_by_ap_id(activity.data["actor"])
      followed = User.get_cached_by_ap_id(activity.data["object"])

      assert activity == Utils.fetch_latest_follow(follower, followed)
    end
  end

  describe "fetch the latest Block" do
    test "fetches the latest Block activity" do
      blocker = insert(:user)
      blocked = insert(:user)
      {:ok, activity} = ActivityPub.block(blocker, blocked)

      assert activity == Utils.fetch_latest_block(blocker, blocked)
    end
  end

  describe "determine_explicit_mentions()" do
    test "works with an object that has mentions" do
      object = %{
        "tag" => [
          %{
            "type" => "Mention",
            "href" => "https://example.com/~alyssa",
            "name" => "Alyssa P. Hacker"
          }
        ]
      }

      assert Utils.determine_explicit_mentions(object) == ["https://example.com/~alyssa"]
    end

    test "works with an object that does not have mentions" do
      object = %{
        "tag" => [
          %{"type" => "Hashtag", "href" => "https://example.com/tag/2hu", "name" => "2hu"}
        ]
      }

      assert Utils.determine_explicit_mentions(object) == []
    end

    test "works with an object that has mentions and other tags" do
      object = %{
        "tag" => [
          %{
            "type" => "Mention",
            "href" => "https://example.com/~alyssa",
            "name" => "Alyssa P. Hacker"
          },
          %{"type" => "Hashtag", "href" => "https://example.com/tag/2hu", "name" => "2hu"}
        ]
      }

      assert Utils.determine_explicit_mentions(object) == ["https://example.com/~alyssa"]
    end

    test "works with an object that has no tags" do
      object = %{}

      assert Utils.determine_explicit_mentions(object) == []
    end

    test "works with an object that has only IR tags" do
      object = %{"tag" => ["2hu"]}

      assert Utils.determine_explicit_mentions(object) == []
    end

    test "works with an object has tags as map" do
      object = %{
        "tag" => %{
          "type" => "Mention",
          "href" => "https://example.com/~alyssa",
          "name" => "Alyssa P. Hacker"
        }
      }

      assert Utils.determine_explicit_mentions(object) == ["https://example.com/~alyssa"]
    end
  end

  describe "make_unlike_data/3" do
    test "returns data for unlike activity" do
      user = insert(:user)
      like_activity = insert(:like_activity, data_attrs: %{"context" => "test context"})

      object = Object.normalize(like_activity.data["object"])

      assert Utils.make_unlike_data(user, like_activity, nil) == %{
               "type" => "Undo",
               "actor" => user.ap_id,
               "object" => like_activity.data,
               "to" => [user.follower_address, object.data["actor"]],
               "cc" => [Pleroma.Constants.as_public()],
               "context" => like_activity.data["context"]
             }

      assert Utils.make_unlike_data(user, like_activity, "9mJEZK0tky1w2xD2vY") == %{
               "type" => "Undo",
               "actor" => user.ap_id,
               "object" => like_activity.data,
               "to" => [user.follower_address, object.data["actor"]],
               "cc" => [Pleroma.Constants.as_public()],
               "context" => like_activity.data["context"],
               "id" => "9mJEZK0tky1w2xD2vY"
             }
    end
  end

  describe "make_like_data" do
    setup do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)
      [user: user, other_user: other_user, third_user: third_user]
    end

    test "addresses actor's follower address if the activity is public", %{
      user: user,
      other_user: other_user,
      third_user: third_user
    } do
      expected_to = Enum.sort([user.ap_id, other_user.follower_address])
      expected_cc = Enum.sort(["https://www.w3.org/ns/activitystreams#Public", third_user.ap_id])

      {:ok, activity} =
        CommonAPI.post(user, %{
          "status" =>
            "hey @#{other_user.nickname}, @#{third_user.nickname} how about beering together this weekend?"
        })

      %{"to" => to, "cc" => cc} = Utils.make_like_data(other_user, activity, nil)
      assert Enum.sort(to) == expected_to
      assert Enum.sort(cc) == expected_cc
    end

    test "does not adress actor's follower address if the activity is not public", %{
      user: user,
      other_user: other_user,
      third_user: third_user
    } do
      expected_to = Enum.sort([user.ap_id])
      expected_cc = [third_user.ap_id]

      {:ok, activity} =
        CommonAPI.post(user, %{
          "status" => "@#{other_user.nickname} @#{third_user.nickname} bought a new swimsuit!",
          "visibility" => "private"
        })

      %{"to" => to, "cc" => cc} = Utils.make_like_data(other_user, activity, nil)
      assert Enum.sort(to) == expected_to
      assert Enum.sort(cc) == expected_cc
    end
  end

  test "make_json_ld_header/0" do
    assert Utils.make_json_ld_header() == %{
             "@context" => [
               "https://www.w3.org/ns/activitystreams",
               "http://localhost:4001/schemas/litepub-0.1.jsonld",
               %{
                 "@language" => "und"
               }
             ]
           }
  end

  describe "get_existing_votes" do
    test "fetches existing votes" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} =
        CommonAPI.post(user, %{
          "status" => "How do I pronounce LaTeX?",
          "poll" => %{
            "options" => ["laytekh", "lahtekh", "latex"],
            "expires_in" => 20,
            "multiple" => true
          }
        })

      object = Object.normalize(activity)
      {:ok, votes, object} = CommonAPI.vote(other_user, object, [0, 1])
      assert Enum.sort(Utils.get_existing_votes(other_user.ap_id, object)) == Enum.sort(votes)
    end

    test "fetches only Create activities" do
      user = insert(:user)
      other_user = insert(:user)

      {:ok, activity} =
        CommonAPI.post(user, %{
          "status" => "Are we living in a society?",
          "poll" => %{
            "options" => ["yes", "no"],
            "expires_in" => 20
          }
        })

      object = Object.normalize(activity)
      {:ok, [vote], object} = CommonAPI.vote(other_user, object, [0])
      vote_object = Object.normalize(vote)
      {:ok, _activity, _object} = ActivityPub.like(user, vote_object)
      [fetched_vote] = Utils.get_existing_votes(other_user.ap_id, object)
      assert fetched_vote.id == vote.id
    end
  end

  describe "update_follow_state_for_all/2" do
    test "updates the state of all Follow activities with the same actor and object" do
      user = insert(:user, locked: true)
      follower = insert(:user)

      {:ok, follow_activity} = ActivityPub.follow(follower, user)
      {:ok, follow_activity_two} = ActivityPub.follow(follower, user)

      data =
        follow_activity_two.data
        |> Map.put("state", "accept")

      cng = Ecto.Changeset.change(follow_activity_two, data: data)

      {:ok, follow_activity_two} = Repo.update(cng)

      {:ok, follow_activity_two} =
        Utils.update_follow_state_for_all(follow_activity_two, "accept")

      assert refresh_record(follow_activity).data["state"] == "accept"
      assert refresh_record(follow_activity_two).data["state"] == "accept"
    end
  end

  describe "update_follow_state/2" do
    test "updates the state of the given follow activity" do
      user = insert(:user, locked: true)
      follower = insert(:user)

      {:ok, follow_activity} = ActivityPub.follow(follower, user)
      {:ok, follow_activity_two} = ActivityPub.follow(follower, user)

      data =
        follow_activity_two.data
        |> Map.put("state", "accept")

      cng = Ecto.Changeset.change(follow_activity_two, data: data)

      {:ok, follow_activity_two} = Repo.update(cng)

      {:ok, follow_activity_two} = Utils.update_follow_state(follow_activity_two, "reject")

      assert refresh_record(follow_activity).data["state"] == "pending"
      assert refresh_record(follow_activity_two).data["state"] == "reject"
    end
  end

  describe "update_element_in_object/3" do
    test "updates likes" do
      user = insert(:user)
      activity = insert(:note_activity)
      object = Object.normalize(activity)

      assert {:ok, updated_object} =
               Utils.update_element_in_object(
                 "like",
                 [user.ap_id],
                 object
               )

      assert updated_object.data["likes"] == [user.ap_id]
      assert updated_object.data["like_count"] == 1
    end
  end

  describe "add_like_to_object/2" do
    test "add actor to likes" do
      user = insert(:user)
      user2 = insert(:user)
      object = insert(:note)

      assert {:ok, updated_object} =
               Utils.add_like_to_object(
                 %Activity{data: %{"actor" => user.ap_id}},
                 object
               )

      assert updated_object.data["likes"] == [user.ap_id]
      assert updated_object.data["like_count"] == 1

      assert {:ok, updated_object2} =
               Utils.add_like_to_object(
                 %Activity{data: %{"actor" => user2.ap_id}},
                 updated_object
               )

      assert updated_object2.data["likes"] == [user2.ap_id, user.ap_id]
      assert updated_object2.data["like_count"] == 2
    end
  end

  describe "remove_like_from_object/2" do
    test "removes ap_id from likes" do
      user = insert(:user)
      user2 = insert(:user)
      object = insert(:note, data: %{"likes" => [user.ap_id, user2.ap_id], "like_count" => 2})

      assert {:ok, updated_object} =
               Utils.remove_like_from_object(
                 %Activity{data: %{"actor" => user.ap_id}},
                 object
               )

      assert updated_object.data["likes"] == [user2.ap_id]
      assert updated_object.data["like_count"] == 1
    end
  end

  describe "get_existing_like/2" do
    test "fetches existing like" do
      note_activity = insert(:note_activity)
      assert object = Object.normalize(note_activity)

      user = insert(:user)
      refute Utils.get_existing_like(user.ap_id, object)
      {:ok, like_activity, _object} = ActivityPub.like(user, object)

      assert ^like_activity = Utils.get_existing_like(user.ap_id, object)
    end
  end

  describe "get_get_existing_announce/2" do
    test "returns nil if announce not found" do
      actor = insert(:user)
      refute Utils.get_existing_announce(actor.ap_id, %{data: %{"id" => "test"}})
    end

    test "fetches existing announce" do
      note_activity = insert(:note_activity)
      assert object = Object.normalize(note_activity)
      actor = insert(:user)

      {:ok, announce, _object} = ActivityPub.announce(actor, object)
      assert Utils.get_existing_announce(actor.ap_id, object) == announce
    end
  end

  describe "fetch_latest_block/2" do
    test "fetches last block activities" do
      user1 = insert(:user)
      user2 = insert(:user)

      assert {:ok, %Activity{} = _} = ActivityPub.block(user1, user2)
      assert {:ok, %Activity{} = _} = ActivityPub.block(user1, user2)
      assert {:ok, %Activity{} = activity} = ActivityPub.block(user1, user2)

      assert Utils.fetch_latest_block(user1, user2) == activity
    end
  end

  describe "recipient_in_message/3" do
    test "returns true when recipient in `to`" do
      recipient = insert(:user)
      actor = insert(:user)
      assert Utils.recipient_in_message(recipient, actor, %{"to" => recipient.ap_id})

      assert Utils.recipient_in_message(
               recipient,
               actor,
               %{"to" => [recipient.ap_id], "cc" => ""}
             )
    end

    test "returns true when recipient in `cc`" do
      recipient = insert(:user)
      actor = insert(:user)
      assert Utils.recipient_in_message(recipient, actor, %{"cc" => recipient.ap_id})

      assert Utils.recipient_in_message(
               recipient,
               actor,
               %{"cc" => [recipient.ap_id], "to" => ""}
             )
    end

    test "returns true when recipient in `bto`" do
      recipient = insert(:user)
      actor = insert(:user)
      assert Utils.recipient_in_message(recipient, actor, %{"bto" => recipient.ap_id})

      assert Utils.recipient_in_message(
               recipient,
               actor,
               %{"bcc" => "", "bto" => [recipient.ap_id]}
             )
    end

    test "returns true when recipient in `bcc`" do
      recipient = insert(:user)
      actor = insert(:user)
      assert Utils.recipient_in_message(recipient, actor, %{"bcc" => recipient.ap_id})

      assert Utils.recipient_in_message(
               recipient,
               actor,
               %{"bto" => "", "bcc" => [recipient.ap_id]}
             )
    end

    test "returns true when message without addresses fields" do
      recipient = insert(:user)
      actor = insert(:user)
      assert Utils.recipient_in_message(recipient, actor, %{"bccc" => recipient.ap_id})

      assert Utils.recipient_in_message(
               recipient,
               actor,
               %{"btod" => "", "bccc" => [recipient.ap_id]}
             )
    end

    test "returns false" do
      recipient = insert(:user)
      actor = insert(:user)
      refute Utils.recipient_in_message(recipient, actor, %{"to" => "ap_id"})
    end
  end

  describe "lazy_put_activity_defaults/2" do
    test "returns map with id and published data" do
      note_activity = insert(:note_activity)
      object = Object.normalize(note_activity)
      res = Utils.lazy_put_activity_defaults(%{"context" => object.data["id"]})
      assert res["context"] == object.data["id"]
      assert res["context_id"] == object.id
      assert res["id"]
      assert res["published"]
    end

    test "returns map with fake id and published data" do
      assert %{
               "context" => "pleroma:fakecontext",
               "context_id" => -1,
               "id" => "pleroma:fakeid",
               "published" => _
             } = Utils.lazy_put_activity_defaults(%{}, true)
    end

    test "returns activity data with object" do
      note_activity = insert(:note_activity)
      object = Object.normalize(note_activity)

      res =
        Utils.lazy_put_activity_defaults(%{
          "context" => object.data["id"],
          "object" => %{}
        })

      assert res["context"] == object.data["id"]
      assert res["context_id"] == object.id
      assert res["id"]
      assert res["published"]
      assert res["object"]["id"]
      assert res["object"]["published"]
      assert res["object"]["context"] == object.data["id"]
      assert res["object"]["context_id"] == object.id
    end
  end

  describe "make_flag_data" do
    test "returns empty map when params is invalid" do
      assert Utils.make_flag_data(%{}, %{}) == %{}
    end

    test "returns map with Flag object" do
      reporter = insert(:user)
      target_account = insert(:user)
      {:ok, activity} = CommonAPI.post(target_account, %{"status" => "foobar"})
      context = Utils.generate_context_id()
      content = "foobar"

      target_ap_id = target_account.ap_id
      activity_ap_id = activity.data["id"]

      res =
        Utils.make_flag_data(
          %{
            actor: reporter,
            context: context,
            account: target_account,
            statuses: [%{"id" => activity.data["id"]}],
            content: content
          },
          %{}
        )

      note_obj = %{
        "type" => "Note",
        "id" => activity_ap_id,
        "content" => content,
        "published" => activity.object.data["published"],
        "actor" => AccountView.render("show.json", %{user: target_account})
      }

      assert %{
               "type" => "Flag",
               "content" => ^content,
               "context" => ^context,
               "object" => [^target_ap_id, ^note_obj],
               "state" => "open"
             } = res
    end
  end

  describe "add_announce_to_object/2" do
    test "adds actor to announcement" do
      user = insert(:user)
      object = insert(:note)

      activity =
        insert(:note_activity,
          data: %{
            "actor" => user.ap_id,
            "cc" => [Pleroma.Constants.as_public()]
          }
        )

      assert {:ok, updated_object} = Utils.add_announce_to_object(activity, object)
      assert updated_object.data["announcements"] == [user.ap_id]
      assert updated_object.data["announcement_count"] == 1
    end
  end

  describe "remove_announce_from_object/2" do
    test "removes actor from announcements" do
      user = insert(:user)
      user2 = insert(:user)

      object =
        insert(:note,
          data: %{"announcements" => [user.ap_id, user2.ap_id], "announcement_count" => 2}
        )

      activity = insert(:note_activity, data: %{"actor" => user.ap_id})

      assert {:ok, updated_object} = Utils.remove_announce_from_object(activity, object)
      assert updated_object.data["announcements"] == [user2.ap_id]
      assert updated_object.data["announcement_count"] == 1
    end
  end

  describe "get_cached_emoji_reactions/1" do
    test "returns the data or an emtpy list" do
      object = insert(:note)
      assert Utils.get_cached_emoji_reactions(object) == []

      object = insert(:note, data: %{"reactions" => [["x", ["lain"]]]})
      assert Utils.get_cached_emoji_reactions(object) == [["x", ["lain"]]]

      object = insert(:note, data: %{"reactions" => %{}})
      assert Utils.get_cached_emoji_reactions(object) == []
    end
  end
end
