# frozen_string_literal: true

require 'rails_helper'

describe Jobs::PollFeed do
  let(:poller) { Jobs::PollFeed.new }

  context "execute" do
    let(:url) { "http://eviltrout.com" }

    before do
      $redis.del("feed-polled-recently")
    end

    it "requires feed_polling_enabled?" do
      SiteSetting.feed_polling_enabled = true
      SiteSetting.feed_polling_url = nil
      poller.expects(:poll_feed).never
      poller.execute({})
    end

    it "requires feed_polling_url" do
      SiteSetting.feed_polling_enabled = false
      SiteSetting.feed_polling_url = nil
      poller.expects(:poll_feed).never
      poller.execute({})
    end

    it "delegates to poll_feed" do
      SiteSetting.feed_polling_enabled = true
      SiteSetting.feed_polling_url = url
      poller.expects(:poll_feed).once
      poller.execute({})
    end

    it "won't poll if it has polled recently" do
      SiteSetting.feed_polling_enabled = true
      SiteSetting.feed_polling_url = url
      poller.expects(:poll_feed).once
      poller.execute({})
      poller.execute({})
    end
  end

  describe '#poll_feed' do
    let(:embed_by_username) { 'eviltrout' }
    let(:embed_username_key_from_feed) { 'discourse:username' }
    fab!(:default_user) { Fabricate(:evil_trout) }
    fab!(:feed_author) { Fabricate(:user, username: 'xrav3nz', email: 'hi@bye.com') }

    shared_examples 'topic creation based on the the feed' do
      describe 'author username parsing' do
        context 'when neither embed_by_username nor embed_username_key_from_feed is set' do
          before do
            SiteSetting.embed_by_username = ""
            SiteSetting.embed_username_key_from_feed = ""
          end

          it 'does not import topics' do
            expect { poller.poll_feed }.not_to change { Topic.count }
          end
        end

        context 'when embed_by_username is set' do
          before do
            SiteSetting.embed_by_username = embed_by_username
            SiteSetting.embed_username_key_from_feed = ""
          end

          it 'creates the new topics under embed_by_username' do
            expect { poller.poll_feed }.to change { Topic.count }.by(1)
            expect(Topic.last.user).to eq(default_user)
          end
        end

        context 'when embed_username_key_from_feed is set' do
          before do
            SiteSetting.embed_username_key_from_feed = embed_username_key_from_feed
          end

          it 'creates the new topics under the username found' do
            expect { poller.poll_feed }.to change { Topic.count }.by(1)
            expect(Topic.last.user).to eq(feed_author)
          end

          it "updates the post if it had been polled" do
            embed_url = 'https://blog.discourse.org/2017/09/poll-feed-spec-fixture'
            post = TopicEmbed.import(Fabricate(:user), embed_url, 'old title', 'old content')

            expect { poller.poll_feed }.to_not change { Topic.count }

            post.reload
            expect(post.raw).to include('<p>This is the body &amp; content. </p>')
            expect(post.user).to eq(feed_author)
          end
        end
      end

      it 'parses creates a new post correctly' do
        expect { poller.poll_feed }.to change { Topic.count }.by(1)
        expect(Topic.last.title).to eq('Poll Feed Spec Fixture')
        expect(Topic.last.first_post.raw).to include('<p>This is the body &amp; content. </p>')
        expect(Topic.last.topic_embed.embed_url).to eq('https://blog.discourse.org/2017/09/poll-feed-spec-fixture')
      end
    end

    context 'when parsing RSS feed' do
      before do
        SiteSetting.feed_polling_enabled = true
        SiteSetting.feed_polling_url = 'https://blog.discourse.org/feed/'
        SiteSetting.embed_by_username = embed_by_username

        stub_request(:head, SiteSetting.feed_polling_url)
        stub_request(:get, SiteSetting.feed_polling_url).to_return(
          body: file_from_fixtures('feed.rss', 'feed').read,
          headers: { "Content-Type" => "application/rss+xml" }
        )
      end

      include_examples 'topic creation based on the the feed'
    end

    context 'when parsing ATOM feed' do
      before do
        SiteSetting.feed_polling_enabled = true
        SiteSetting.feed_polling_url = 'https://blog.discourse.org/feed/atom/'
        SiteSetting.embed_by_username = embed_by_username

        stub_request(:head, SiteSetting.feed_polling_url)
        stub_request(:get, SiteSetting.feed_polling_url).to_return(
          body: file_from_fixtures('feed.atom', 'feed').read,
          headers: { "Content-Type" => "application/atom+xml" }
        )
      end

      include_examples 'topic creation based on the the feed'
    end

    it "aborts when it can't fetch the feed" do
      SiteSetting.feed_polling_enabled = true
      SiteSetting.feed_polling_url = 'https://blog.discourse.org/feed/atom/'
      SiteSetting.embed_by_username = 'eviltrout'

      stub_request(:head, SiteSetting.feed_polling_url).to_return(status: 404)
      stub_request(:get, SiteSetting.feed_polling_url).to_return(status: 404)

      expect { poller.poll_feed }.to_not change { Topic.count }
    end

    context 'encodings' do
      before do
        SiteSetting.feed_polling_enabled = true
        SiteSetting.feed_polling_url = 'https://blog.discourse.org/feed/atom/'
        SiteSetting.embed_by_username = 'eviltrout'

        stub_request(:head, SiteSetting.feed_polling_url)
      end

      it 'works with encodings other than UTF-8' do
        stub_request(:get, SiteSetting.feed_polling_url).to_return(
          body: file_from_fixtures('utf-16le-feed.rss', 'feed').read,
          headers: { "Content-Type" => "application/rss+xml" }
        )

        expect { poller.poll_feed }.to change { Topic.count }.by(1)
        expect(Topic.last.first_post.raw).to include('<p>This is the body &amp; content. </p>')
      end

      it 'respects the charset in the Content-Type header' do
        stub_request(:get, SiteSetting.feed_polling_url).to_return(
          body: file_from_fixtures('iso-8859-15-feed.rss', 'feed').read,
          headers: { "Content-Type" => "application/rss+xml; charset=ISO-8859-15" }
        )

        expect { poller.poll_feed }.to change { Topic.count }.by(1)
        expect(Topic.last.first_post.raw).to include('<p>This is the body &amp; content. 100€ </p>')
      end

      it 'works when the charset in the Content-Type header is unknown' do
        stub_request(:get, SiteSetting.feed_polling_url).to_return(
          body: file_from_fixtures('feed.rss', 'feed').read,
          headers: { "Content-Type" => "application/rss+xml; charset=foo" }
        )

        expect { poller.poll_feed }.to change { Topic.count }.by(1)
        expect(Topic.last.first_post.raw).to include('<p>This is the body &amp; content. </p>')
      end
    end
  end
end