mastodon/spec/services/activitypub/fetch_remote_status_service_spec.rb

# frozen_string_literal: true

require 'rails_helper'

RSpec.describe ActivityPub::FetchRemoteStatusService, type: :service do
  include ActionView::Helpers::TextHelper

  subject { described_class.new }

  let!(:sender) { Fabricate(:account, domain: 'foo.bar', uri: 'https://foo.bar') }
  let!(:recipient) { Fabricate(:account) }

  let(:existing_status) { nil }

  let(:note) do
    {
      '@context': 'https://www.w3.org/ns/activitystreams',
      id: 'https://foo.bar/@foo/1234',
      type: 'Note',
      content: 'Lorem ipsum',
      attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
    }
  end

  before do
    stub_request(:get, 'https://foo.bar/watch?v=12345').to_return(status: 404, body: '')
    stub_request(:get, object[:id]).to_return(body: Oj.dump(object))
  end

  describe '#call' do
    before do
      existing_status
      subject.call(object[:id], prefetched_body: Oj.dump(object))
    end

    context 'with Note object' do
      let(:object) { note }

      it 'creates status' do
        status = sender.statuses.first

        expect(status).to_not be_nil
        expect(status.text).to eq 'Lorem ipsum'
      end
    end

    context 'with Video object' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1234',
          type: 'Video',
          name: 'Nyan Cat 10 hours remix',
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
          url: [
            {
              type: 'Link',
              mimeType: 'application/x-bittorrent',
              href: 'https://foo.bar/12345.torrent',
            },

            {
              type: 'Link',
              mimeType: 'text/html',
              href: 'https://foo.bar/watch?v=12345',
            },
          ],
        }
      end

      it 'creates status' do
        status = sender.statuses.first

        expect(status).to_not be_nil
        expect(status.url).to eq 'https://foo.bar/watch?v=12345'
        expect(strip_tags(status.text)).to eq 'Nyan Cat 10 hours remixhttps://foo.bar/watch?v=12345'
      end
    end

    context 'with Audio object' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1234',
          type: 'Audio',
          name: 'Nyan Cat 10 hours remix',
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
          url: [
            {
              type: 'Link',
              mimeType: 'application/x-bittorrent',
              href: 'https://foo.bar/12345.torrent',
            },

            {
              type: 'Link',
              mimeType: 'text/html',
              href: 'https://foo.bar/watch?v=12345',
            },
          ],
        }
      end

      it 'creates status' do
        status = sender.statuses.first

        expect(status).to_not be_nil
        expect(status.url).to eq 'https://foo.bar/watch?v=12345'
        expect(strip_tags(status.text)).to eq 'Nyan Cat 10 hours remixhttps://foo.bar/watch?v=12345'
      end
    end

    context 'with Event object' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1234',
          type: 'Event',
          name: "Let's change the world",
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
        }
      end

      it 'creates status' do
        status = sender.statuses.first

        expect(status).to_not be_nil
        expect(status.url).to eq 'https://foo.bar/@foo/1234'
        expect(strip_tags(status.text)).to eq "Let's change the worldhttps://foo.bar/@foo/1234"
      end
    end

    context 'with wrong id' do
      let(:note) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://real.address/@foo/1234',
          type: 'Note',
          content: 'Lorem ipsum',
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
        }
      end

      let(:object) do
        temp = note.dup
        temp[:id] = 'https://fake.address/@foo/5678'
        temp
      end

      it 'does not create status' do
        expect(sender.statuses.first).to be_nil
      end
    end

    context 'with a valid Create activity' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1234/create',
          type: 'Create',
          actor: ActivityPub::TagManager.instance.uri_for(sender),
          object: note,
        }
      end

      it 'creates status' do
        status = sender.statuses.first

        expect(status).to_not be_nil
        expect(status.uri).to eq note[:id]
        expect(status.text).to eq note[:content]
      end
    end

    context 'with a Create activity with a mismatching id' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1234/create',
          type: 'Create',
          actor: ActivityPub::TagManager.instance.uri_for(sender),
          object: {
            id: 'https://real.address/@foo/1234',
            type: 'Note',
            content: 'Lorem ipsum',
            attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
          },
        }
      end

      it 'does not create status' do
        expect(sender.statuses.first).to be_nil
      end
    end

    context 'when status already exists' do
      let(:existing_status) { Fabricate(:status, account: sender, text: 'Foo', uri: note[:id]) }

      context 'with a Note object' do
        let(:object) { note.merge(updated: '2021-09-08T22:39:25Z') }

        it 'updates status' do
          existing_status.reload
          expect(existing_status.text).to eq 'Lorem ipsum'
          expect(existing_status.edits).to_not be_empty
        end
      end

      context 'with a Create activity' do
        let(:object) do
          {
            '@context': 'https://www.w3.org/ns/activitystreams',
            id: 'https://foo.bar/@foo/1234/create',
            type: 'Create',
            actor: ActivityPub::TagManager.instance.uri_for(sender),
            object: note.merge(updated: '2021-09-08T22:39:25Z'),
          }
        end

        it 'updates status' do
          existing_status.reload
          expect(existing_status.text).to eq 'Lorem ipsum'
          expect(existing_status.edits).to_not be_empty
        end
      end
    end
  end

  context 'with statuses referencing other statuses' do
    before do
      stub_const 'ActivityPub::FetchRemoteStatusService::DISCOVERIES_PER_REQUEST', 5
    end

    context 'when using inReplyTo' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1',
          type: 'Note',
          content: 'Lorem ipsum',
          inReplyTo: 'https://foo.bar/@foo/2',
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
        }
      end

      before do
        8.times do |i|
          status_json = {
            '@context': 'https://www.w3.org/ns/activitystreams',
            id: "https://foo.bar/@foo/#{i}",
            type: 'Note',
            content: 'Lorem ipsum',
            inReplyTo: "https://foo.bar/@foo/#{i + 1}",
            attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
            to: 'as:Public',
          }.with_indifferent_access
          stub_request(:get, "https://foo.bar/@foo/#{i}").to_return(status: 200, body: status_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
        end
      end

      it 'creates at least some statuses' do
        expect { subject.call(object[:id], prefetched_body: Oj.dump(object)) }.to change { sender.statuses.count }.by_at_least(2)
      end

      it 'creates no more account than the limit allows' do
        expect { subject.call(object[:id], prefetched_body: Oj.dump(object)) }.to change { sender.statuses.count }.by_at_most(5)
      end
    end

    context 'when using replies' do
      let(:object) do
        {
          '@context': 'https://www.w3.org/ns/activitystreams',
          id: 'https://foo.bar/@foo/1',
          type: 'Note',
          content: 'Lorem ipsum',
          replies: {
            type: 'Collection',
            id: 'https://foo.bar/@foo/1/replies',
            first: {
              type: 'CollectionPage',
              partOf: 'https://foo.bar/@foo/1/replies',
              items: ['https://foo.bar/@foo/2'],
            },
          },
          attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
        }
      end

      before do
        8.times do |i|
          status_json = {
            '@context': 'https://www.w3.org/ns/activitystreams',
            id: "https://foo.bar/@foo/#{i}",
            type: 'Note',
            content: 'Lorem ipsum',
            replies: {
              type: 'Collection',
              id: "https://foo.bar/@foo/#{i}/replies",
              first: {
                type: 'CollectionPage',
                partOf: "https://foo.bar/@foo/#{i}/replies",
                items: ["https://foo.bar/@foo/#{i + 1}"],
              },
            },
            attributedTo: ActivityPub::TagManager.instance.uri_for(sender),
            to: 'as:Public',
          }.with_indifferent_access
          stub_request(:get, "https://foo.bar/@foo/#{i}").to_return(status: 200, body: status_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
        end
      end

      it 'creates at least some statuses' do
        expect { subject.call(object[:id], prefetched_body: Oj.dump(object)) }.to change { sender.statuses.count }.by_at_least(2)
      end

      it 'creates no more account than the limit allows' do
        expect { subject.call(object[:id], prefetched_body: Oj.dump(object)) }.to change { sender.statuses.count }.by_at_most(5)
      end
    end
  end
end