discourse/spec/lib/oneboxer_spec.rb

# frozen_string_literal: true

RSpec.describe Oneboxer do
  def response(file)
    file = File.join("spec", "fixtures", "onebox", "#{file}.response")
    File.exist?(file) ? File.read(file) : ""
  end

  it "returns blank string for an invalid onebox" do
    stub_request(:head, "http://boom.com")
    stub_request(:get, "http://boom.com").to_return(body: "")

    expect(Oneboxer.preview("http://boom.com", invalidate_oneboxes: true)).to include(
      "Sorry, we were unable to generate a preview for this web page",
    )
    expect(Oneboxer.onebox("http://boom.com")).to eq("")
  end

  describe "#invalidate" do
    let(:url) { "http://test.com" }
    it "clears the cached preview for the onebox URL and the failed URL cache" do
      Discourse.cache.write(Oneboxer.onebox_cache_key(url), "test")
      Discourse.cache.write(Oneboxer.onebox_failed_cache_key(url), true)
      Oneboxer.invalidate(url)
      expect(Discourse.cache.read(Oneboxer.onebox_cache_key(url))).to eq(nil)
      expect(Discourse.cache.read(Oneboxer.onebox_failed_cache_key(url))).to eq(nil)
    end
  end

  describe "local oneboxes" do
    def link(url)
      url = "#{Discourse.base_url}#{url}"
      %{<a href="#{url}">#{url}</a>}
    end

    def preview(url, user = nil, category = nil, topic = nil)
      Oneboxer.preview(
        "#{Discourse.base_url}#{url}",
        user_id: user&.id,
        category_id: category&.id,
        topic_id: topic&.id,
      ).to_s
    end

    it "links to a topic/post" do
      staff = Fabricate(:user)
      Group[:staff].add(staff)

      secured_category = Fabricate(:category)
      secured_category.permissions = { staff: :full }
      secured_category.save!

      replier = Fabricate(:user)

      public_post = Fabricate(:post, raw: "This post has an emoji :+1:")
      public_topic = public_post.topic
      public_reply = Fabricate(:post, topic: public_topic, post_number: 2, user: replier)
      public_hidden = Fabricate(:post, topic: public_topic, post_number: 3, hidden: true)
      public_moderator_action =
        Fabricate(
          :post,
          topic: public_topic,
          post_number: 4,
          user: staff,
          post_type: Post.types[:moderator_action],
        )

      user = public_post.user
      public_category = public_topic.category

      secured_topic = Fabricate(:topic, user: staff, category: secured_category)
      secured_post = Fabricate(:post, user: staff, topic: secured_topic)
      secured_reply = Fabricate(:post, user: staff, topic: secured_topic, post_number: 2)

      expect(preview(public_topic.relative_url, user, public_category)).to include(
        public_topic.title,
      )
      onebox = preview(public_post.url, user, public_category)
      expect(onebox).to include(public_topic.title)
      expect(onebox).to include("/images/emoji/")

      onebox = preview(public_reply.url, user, public_category)
      expect(onebox).to include(public_reply.excerpt)
      expect(onebox).to include(%{data-post="2"})
      expect(onebox).to include(PrettyText.avatar_img(replier.avatar_template_url, "tiny"))

      short_url = "#{Discourse.base_path}/t/#{public_topic.id}"
      expect(preview(short_url, user, public_category)).to include(public_topic.title)

      onebox = preview(public_moderator_action.url, user, public_category)
      expect(onebox).to include(public_moderator_action.excerpt)
      expect(onebox).to include(%{data-post="4"})
      expect(onebox).to include(PrettyText.avatar_img(staff.avatar_template_url, "tiny"))

      onebox = preview(public_reply.url, user, public_category, public_topic)
      expect(onebox).not_to include(public_topic.title)
      expect(onebox).to include(replier.avatar_template_url.sub("{size}", "48"))

      expect(preview(public_hidden.url, user, public_category)).to match_html(
        link(public_hidden.url),
      )
      expect(preview(secured_topic.relative_url, user, public_category)).to match_html(
        link(secured_topic.relative_url),
      )
      expect(preview(secured_post.url, user, public_category)).to match_html(link(secured_post.url))
      expect(preview(secured_reply.url, user, public_category)).to match_html(
        link(secured_reply.url),
      )

      expect(preview(public_topic.relative_url, user, secured_category)).to match_html(
        link(public_topic.relative_url),
      )
      expect(preview(public_reply.url, user, secured_category)).to match_html(
        link(public_reply.url),
      )
      expect(preview(secured_post.url, user, secured_category)).to match_html(
        link(secured_post.url),
      )
      expect(preview(secured_reply.url, user, secured_category)).to match_html(
        link(secured_reply.url),
      )

      expect(preview(public_topic.relative_url, staff, secured_category)).to include(
        public_topic.title,
      )
      expect(preview(public_post.url, staff, secured_category)).to include(public_topic.title)
      expect(preview(public_reply.url, staff, secured_category)).to include(public_reply.excerpt)
      expect(preview(public_hidden.url, staff, secured_category)).to match_html(
        link(public_hidden.url),
      )
      expect(preview(secured_topic.relative_url, staff, secured_category)).to include(
        secured_topic.title,
      )
      expect(preview(secured_post.url, staff, secured_category)).to include(secured_topic.title)
      expect(preview(secured_reply.url, staff, secured_category)).to include(secured_reply.excerpt)
      expect(preview(secured_reply.url, staff, secured_category, secured_topic)).not_to include(
        secured_topic.title,
      )
    end

    it "links to an user profile" do
      user = Fabricate(:user)

      expect(preview("/u/does-not-exist")).to match_html(link("/u/does-not-exist"))
      expect(preview("/u/#{user.username}")).to include(user.name)
    end

    it "should respect enable_names site setting" do
      user = Fabricate(:user)

      SiteSetting.enable_names = true
      expect(preview("/u/#{user.username}")).to include(user.name)
      SiteSetting.enable_names = false
      expect(preview("/u/#{user.username}")).not_to include(user.name)
    end

    it "links to an upload" do
      path = "/uploads/default/original/3X/e/8/e8fcfa624e4fb6623eea57f54941a58ba797f14d"

      expect(preview("#{path}.pdf")).to match_html(link("#{path}.pdf"))
      expect(preview("#{path}.MP3")).to include("<audio ")
      expect(preview("#{path}.mov")).to include("<video ")
    end

    it "strips HTML from user profile location" do
      user = Fabricate(:user)
      profile = user.reload.user_profile

      expect(preview("/u/#{user.username}")).not_to include("<span class=\"location\">")

      profile.update!(location: "<img src=x onerror=alert(document.domain)>")

      expect(preview("/u/#{user.username}")).to include("<span class=\"location\">")
      expect(preview("/u/#{user.username}")).not_to include("<img src=x")

      profile.update!(location: "Thunderland")

      expect(preview("/u/#{user.username}")).to include("Thunderland")
    end

    it "includes hashtag HTML" do
      category = Fabricate(:category, slug: "random")
      tag = Fabricate(:tag, name: "bug")
      public_post = Fabricate(:post, raw: "This post has some hashtags, #random and #bug")
      preview =
        Nokogiri::HTML5
          .fragment(preview(public_post.url).chomp)
          .css("blockquote")
          .inner_html
          .chomp
          .strip
      expect(preview).to include("This post has some hashtags")
      expect(preview).to have_tag(
        "a",
        with: {
          class: "hashtag-cooked",
          href: category.url,
          "data-type": "category",
          "data-slug": category.slug,
          "data-id": category.id,
        },
      ) do
        with_tag("span", with: { class: "hashtag-icon-placeholder" })
      end
      expect(preview).to have_tag(
        "a",
        with: {
          class: "hashtag-cooked",
          href: tag.url,
          "data-type": "tag",
          "data-slug": tag.name,
          "data-id": tag.id,
        },
      ) do
        with_tag("span", with: { class: "hashtag-icon-placeholder" })
      end
    end

    it "does not show private subcategory information" do
      parent_category = Fabricate(:category)
      private_subcategory =
        Fabricate(
          :private_category,
          parent_category: parent_category,
          group: Fabricate(:group, name: "superhero"),
          name: "Private Subcategory",
        )
      public_subcategory =
        Fabricate(:category, parent_category: parent_category, name: "Public Subcategory")

      preview = preview(parent_category.relative_url)
      expect(preview).not_to include(private_subcategory.name)
      expect(preview).not_to include(private_subcategory.url)

      expect(preview).to include(public_subcategory.name)
      expect(preview).to include(public_subcategory.url)
    end
  end

  describe ".onebox_raw" do
    it "should escape the onebox URL before processing" do
      post = Fabricate(:post, raw: Discourse.base_url + "/new?'class=black")
      cpp = CookedPostProcessor.new(post, invalidate_oneboxes: true)
      cpp.post_process_oneboxes
      expect(cpp.html).to eq(
        "<p><a href=\"#{Discourse.base_url}/new?%27class=black\">http://test.localhost/new?%27class=black</a></p>",
      )
    end

    it "escapes URLs of local audio uploads" do
      result =
        described_class.onebox_raw(
          "#{Discourse.base_url}/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#'<>",
        )
      expect(result[:onebox]).to eq(<<~HTML)
        <audio  controls>
          <source src='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E'>
          <a href='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E'>
            http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E
          </a>
        </audio>
      HTML
      expect(result[:preview]).to eq(<<~HTML)
        <audio  controls>
          <source src='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E'>
          <a href='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E'>
            http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.wav#&apos;%3C%3E
          </a>
        </audio>
      HTML
    end

    it "escapes URLs of local video uploads" do
      result =
        described_class.onebox_raw(
          "#{Discourse.base_url}/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#'<>",
        )
      expect(result[:onebox]).to eq(<<~HTML)
        <div class="onebox video-onebox">
          <video  width="100%" height="100%" controls="">
            <source src='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E'>
            <a href='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E'>
              http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E
            </a>
          </video>
        </div>
      HTML
      expect(result[:preview]).to eq(<<~HTML)
        <div class="onebox video-onebox">
          <video  width="100%" height="100%" controls="">
            <source src='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E'>
            <a href='http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E'>
              http://test.localhost/uploads/default/original/1X/a1c31803be81b85ecafc4f77b1008eee9b3b82f4.mp4#&apos;%3C%3E
            </a>
          </video>
        </div>
      HTML
    end

    it "escapes URLs of generic local links" do
      result = described_class.onebox_raw("#{Discourse.base_url}/g/somegroup#'onerror='")
      expect(result[:onebox]).to eq(
        "<a href='http://test.localhost/g/somegroup#&apos;onerror=&apos;'>http://test.localhost/g/somegroup#&apos;onerror=&apos;</a>",
      )
      expect(result[:preview]).to eq(
        "<a href='http://test.localhost/g/somegroup#&apos;onerror=&apos;'>http://test.localhost/g/somegroup#&apos;onerror=&apos;</a>",
      )
    end

    context "when URL contains non-ASCII characters" do
      let(:html) { <<~HTML }
        <html>
        <head>
          <meta property="og:title" content="Cats">
          <meta property="og:description" content="Meow">
        </head>
        <body>
           <p>body</p>
        </body>
        <html>
      HTML

      context "when response is not a redirect" do
        let(:url) { "https://its.me/héhé" }

        before do
          stub_request(:get, url).to_return(status: 200, body: html, headers: {})
          stub_request(:head, url).to_return(status: 200, body: "", headers: {})
        end

        it "does not break" do
          expect(described_class.onebox_raw(url)[:onebox]).to be_present
        end
      end

      context "when response is a redirect" do
        let(:url) { "https://its.me" }
        let(:non_ascii_url) { "#{url}/h%C3%A9h%C3%A9" }

        before do
          stub_request(:get, url).to_return(
            status: 301,
            body: "",
            headers: {
              "location" => non_ascii_url,
            },
          )
          stub_request(:head, url).to_return(
            status: 301,
            body: "",
            headers: {
              "location" => non_ascii_url,
            },
          )
          stub_request(:get, non_ascii_url).to_return(status: 200, body: html, headers: {})
          stub_request(:head, non_ascii_url).to_return(status: 200, body: "", headers: {})
        end

        it "does not break" do
          expect(described_class.onebox_raw(url)[:onebox]).to be_present
        end
      end
    end
  end

  describe ".external_onebox" do
    let(:html) { <<~HTML }
      <html>
      <head>
        <meta property="og:title" content="Cats">
        <meta property="og:description" content="Meow">
      </head>
      <body>
         <p>body</p>
      </body>
      <html>
    HTML

    context "with blacklisted domains" do
      it "does not return a onebox if redirect uri final destination is in blacklist" do
        SiteSetting.blocked_onebox_domains = "kitten.com"

        stub_request(:get, "http://cat.com/meow").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://kitten.com",
          },
        )
        stub_request(:head, "http://cat.com/meow").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://kitten.com",
          },
        )

        stub_request(:get, "https://kitten.com").to_return(status: 200, body: html, headers: {})
        stub_request(:head, "https://kitten.com").to_return(status: 200, body: "", headers: {})

        result = Oneboxer.external_onebox("http://cat.com/meow")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty

        result = Oneboxer.external_onebox("http://kitten.com")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty
      end

      it "does not return onebox if anything in the redirect chain is blocked" do
        SiteSetting.blocked_onebox_domains = "middle.com"

        stub_request(:get, "https://cat.com/start").to_return(
          status: 301,
          body: "a",
          headers: {
            "location" => "https://middle.com/midway",
          },
        )
        stub_request(:head, "https://cat.com/start").to_return(
          status: 301,
          body: "a",
          headers: {
            "location" => "https://middle.com/midway",
          },
        )

        stub_request(:head, "https://middle.com/midway").to_return(
          status: 301,
          body: "b",
          headers: {
            "location" => "https://cat.com/end",
          },
        )

        stub_request(:get, "https://cat.com/end").to_return(status: 200, body: html)
        stub_request(:head, "https://cat.com/end").to_return(status: 200, body: "", headers: {})

        result = Oneboxer.external_onebox("https://cat.com/start")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty
      end

      it "does not return onebox if the Discourse-No-Onebox header == 1" do
        stub_request(:get, "https://website.com/discourse-no-onebox").to_return(
          status: 200,
          body: "abc",
          headers: {
            "Discourse-No-Onebox" => "1",
          },
        )
        stub_request(:head, "https://website.com/discourse-no-onebox").to_return(
          status: 200,
          body: "",
          headers: {
            "Discourse-No-Onebox" => "1",
          },
        )

        result = Oneboxer.external_onebox("https://website.com/discourse-no-onebox")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty
      end

      it "does not return onebox if the Discourse-No-Onebox header == 1 anywhere in the redirect chain" do
        stub_request(:get, "https://website.com/redirect-no-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "Discourse-No-Onebox" => "1",
            "location" => "https://willneverreach.com",
          },
        )
        stub_request(:head, "https://website.com/redirect-no-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "Discourse-No-Onebox" => "1",
            "location" => "https://willneverreach.com",
          },
        )

        result = Oneboxer.external_onebox("https://website.com/redirect-no-onebox")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty

        stub_request(:get, "https://website.com/redirect").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://website.com/redirect/dont-onebox",
          },
        )
        stub_request(:head, "https://website.com/redirect").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://website.com/redirect/dont-onebox",
          },
        )
        stub_request(:get, "https://website.com/redirect/dont-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "Discourse-No-Onebox" => "1",
            "location" => "https://wontreachme.com",
          },
        )
        stub_request(:head, "https://website.com/redirect/dont-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "Discourse-No-Onebox" => "1",
            "location" => "https://wontreachme.com",
          },
        )

        result = Oneboxer.external_onebox("https://website.com/redirect")
        expect(result[:onebox]).to be_empty
        expect(result[:preview]).to be_empty
      end
    end

    context "when block_onebox_on_redirect setting is enabled" do
      before do
        Discourse.cache.clear
        SiteSetting.block_onebox_on_redirect = true
      end

      after do
        FinalDestination.clear_https_cache!("redirects2.com")
        FinalDestination.clear_https_cache!("redirects3.com")
        FinalDestination.clear_https_cache!("redirects4.com")
      end

      it "doesn't return onebox if the URL redirects" do
        stub_request(:head, "https://redirects2.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects2.com/real-full-onebox",
          },
        )
        stub_request(:get, "https://redirects2.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects2.com/real-full-onebox",
          },
        )
        result = Oneboxer.external_onebox("https://redirects2.com/full-onebox")
        expect(result[:onebox]).to be_blank
      end

      it "allows an initial http -> https redirect if the redirect URL is identical to the original" do
        stub_request(:get, "http://redirects3.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects3.com/full-onebox",
          },
        )
        stub_request(:head, "http://redirects3.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects3.com/full-onebox",
          },
        )

        stub_request(:get, "https://redirects3.com/full-onebox").to_return(status: 200, body: html)
        stub_request(:head, "https://redirects3.com/full-onebox").to_return(status: 200, body: "")
        result = Oneboxer.external_onebox("http://redirects3.com/full-onebox")
        onebox = result[:onebox]
        expect(onebox).to include("https://redirects3.com/full-onebox")
        expect(onebox).to include("Cats")
        expect(onebox).to include("Meow")
      end

      it "doesn't allow an initial http -> https redirect if the redirect URL is different to the original" do
        stub_request(:get, "http://redirects4.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects4.com/full-onebox/2",
          },
        )
        stub_request(:head, "http://redirects4.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects4.com/full-onebox/2",
          },
        )

        stub_request(:get, "https://redirects4.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects4.com/full-onebox/2",
          },
        )
        stub_request(:head, "https://redirects4.com/full-onebox").to_return(
          status: 301,
          body: "",
          headers: {
            "location" => "https://redirects4.com/full-onebox/2",
          },
        )
        result = Oneboxer.external_onebox("http://redirects4.com/full-onebox")
        expect(result[:onebox]).to be_blank
      end
    end

    it "censors external oneboxes" do
      Fabricate(:watched_word, action: WatchedWord.actions[:censor], word: "bad word")

      url = "https://example.com/"
      stub_request(:any, url).to_return(status: 200, body: <<~HTML, headers: {})
      <html>
      <head>
        <meta property="og:title" content="title with bad word">
        <meta property="og:description" content="description with bad word">
      </head>
      <body>
        <p>content with bad word</p>
      </body>
      <html>
      HTML

      onebox = Oneboxer.external_onebox(url)
      expect(onebox[:onebox]).to include("title with")
      expect(onebox[:onebox]).not_to include("bad word")
      expect(onebox[:preview]).to include("title with")
      expect(onebox[:preview]).not_to include("bad word")
    end

    it "returns onebox" do
      SiteSetting.blocked_onebox_domains = "not.me"

      stub_request(:get, "https://its.me").to_return(status: 200, body: html)
      stub_request(:head, "https://its.me").to_return(status: 200, body: "", headers: {})

      expect(Oneboxer.external_onebox("https://its.me")[:onebox]).to be_present
    end
  end

  describe "onebox custom user agent" do
    let!(:default_onebox_user_agent) { Discourse.user_agent }

    it "uses the site setting value" do
      SiteSetting.force_custom_user_agent_hosts = "http://codepen.io|https://video.discourse.org/"
      url = "https://video.discourse.org/presentation.mp4"
      custom_user_agent = "Custom User Agent"

      %i[head get].each do |method|
        stub_request(method, url).with(
          headers: {
            "User-Agent" => default_onebox_user_agent,
          },
        ).to_return(status: 403, body: "", headers: {})
        stub_request(method, url).with(
          headers: {
            "User-Agent" => "#{custom_user_agent} v#{Discourse::VERSION::STRING}",
          },
        ).to_return(status: 200, body: "", headers: {})
      end

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include("onebox-warning-message")

      SiteSetting.onebox_user_agent = custom_user_agent

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include(
        "onebox-placeholder-container",
      )
    end

    it "forcing on specified hosts" do
      SiteSetting.force_custom_user_agent_hosts = "http://codepen.io|https://video.discourse.org/"
      url = "https://video.discourse.org/presentation.mp4"

      stub_request(:head, url).to_return(status: 403, body: "", headers: {})
      stub_request(:get, url).to_return(status: 403, body: "", headers: {})
      stub_request(:head, url).with(
        headers: {
          "User-Agent" => default_onebox_user_agent,
        },
      ).to_return(status: 200, body: "", headers: {})
      stub_request(:get, url).with(
        headers: {
          "User-Agent" => default_onebox_user_agent,
        },
      ).to_return(status: 200, body: "", headers: {})

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include(
        "onebox-placeholder-container",
      )
    end
  end

  context "with youtube stub" do
    let(:html) { <<~HTML }
        <html>
        <head>
          <meta property="og:title" content="Onebox1 - ceci n'est pas un titre">
          <meta property="og:description" content="this is bodycontent">
          <meta property="og:image" content="https://i.ytimg.com/vi/dQw4w9WgXcQ/maxresdefault.jpg">
        </head>
        <body>
           <p>body</p>
        </body>
        <html>
      HTML

    before do
      stub_request(:any, "https://www.youtube.com/watch?v=dQw4w9WgXcQ").to_return(
        status: 200,
        body: html,
      )
      stub_request(
        :get,
        "https://www.youtube.com/oembed?url=https://www.youtube.com/watch?v=dQw4w9WgXcQ",
      ).to_return(
        status: 200,
        body: {
          title: "Onebox1 - ceci n'est pas un titre",
          author_name: "Blah",
          thumbnail_url: "https://i.ytimg.com/vi/dQw4w9WgXcQ/hqdefault.jpg",
        }.to_json,
      )
      stub_request(:any, "https://www.youtube.com/embed/dQw4w9WgXcQ").to_return(
        status: 403,
        body: nil,
      )
    end

    it "allows restricting engines based on the allowed_onebox_iframes setting" do
      output =
        Oneboxer.onebox("https://www.youtube.com/watch?v=dQw4w9WgXcQ", invalidate_oneboxes: true)
      expect(output).to include("<iframe") # Regular youtube onebox

      # Disable all onebox iframes:
      SiteSetting.allowed_onebox_iframes = ""
      output =
        Oneboxer.onebox("https://www.youtube.com/watch?v=dQw4w9WgXcQ", invalidate_oneboxes: true)

      expect(output).not_to include("<iframe") # Generic onebox
      expect(output).to include("allowlistedgeneric")

      # Just enable youtube:
      SiteSetting.allowed_onebox_iframes = "https://www.youtube.com"
      output =
        Oneboxer.onebox("https://www.youtube.com/watch?v=dQw4w9WgXcQ", invalidate_oneboxes: true)
      expect(output).to include("<iframe") # Regular youtube onebox
    end

    it "appropriately escapes youtube titles" do
      preview =
        Oneboxer.preview("https://www.youtube.com/watch?v=dQw4w9WgXcQ", invalidate_oneboxes: true)
      expect(preview).to include("ceci n'est pas un titre")
    end
  end

  it "allows iframes from generic sites via the allowed_iframes setting" do
    allowlisted_body =
      '<html><head><link rel="alternate" type="application/json+oembed" href="https://allowlist.ed/iframes.json" />'
    blocklisted_body =
      '<html><head><link rel="alternate" type="application/json+oembed" href="https://blocklist.ed/iframes.json" />'

    allowlisted_oembed = {
      type: "rich",
      height: "100",
      html: "<iframe src='https://ifram.es/foo/bar'></iframe>",
    }

    blocklisted_oembed = {
      type: "rich",
      height: "100",
      html: "<iframe src='https://malicious/discourse.org/'></iframe>",
    }

    stub_request(:any, "https://blocklist.ed/iframes").to_return(
      status: 200,
      body: blocklisted_body,
    )
    stub_request(:any, "https://blocklist.ed/iframes.json").to_return(
      status: 200,
      body: blocklisted_oembed.to_json,
    )

    stub_request(:any, "https://allowlist.ed/iframes").to_return(
      status: 200,
      body: allowlisted_body,
    )
    stub_request(:any, "https://allowlist.ed/iframes.json").to_return(
      status: 200,
      body: allowlisted_oembed.to_json,
    )

    SiteSetting.allowed_iframes = "https://discourse.org/|https://ifram.es/"

    expect(Oneboxer.onebox("https://blocklist.ed/iframes", invalidate_oneboxes: true)).to be_empty
    expect(Oneboxer.onebox("https://allowlist.ed/iframes", invalidate_oneboxes: true)).to match(
      "iframe src",
    )
  end

  describe "missing attributes" do
    before { stub_request(:head, url) }

    let(:url) { "https://example.com/fake-url/" }

    it "handles a missing description, title-only oneboxes are fine" do
      stub_request(:get, url).to_return(body: response("missing_description"))
      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).not_to include(
        "could not be found: description",
      )
    end

    it "handles a missing image" do
      # Note: If the only error is a missing image, we shouldn't return an error
      stub_request(:get, url).to_return(body: response("missing_image"))
      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).not_to include("could not be found")
    end

    it "video with missing description returns a placeholder" do
      stub_request(:get, url).to_return(body: response("video_missing_description"))
      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include(
        "onebox-placeholder-container",
      )
    end
  end

  describe "instagram" do
    it "providing a token should attempt to use new endpoint" do
      url = "https://www.instagram.com/p/CHLkBERAiLa"
      access_token = "abc123"

      SiteSetting.facebook_app_access_token = access_token

      stub_request(:head, url)
      stub_request(
        :get,
        "https://graph.facebook.com/v9.0/instagram_oembed?url=#{url}&access_token=#{access_token}",
      ).to_return(body: response("instagram_new"))

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include("placeholder-icon image")
    end

    it "unconfigured token should attempt to use old endpoint" do
      url = "https://www.instagram.com/p/CHLkBERAiLa"
      stub_request(:head, url)
      stub_request(:get, "https://api.instagram.com/oembed/?url=#{url}").to_return(
        body: response("instagram_old"),
      )

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include("placeholder-icon image")
    end

    it "renders result using an iframe" do
      url = "https://www.instagram.com/p/CHLkBERAiLa"
      stub_request(:head, url)
      stub_request(:get, "https://api.instagram.com/oembed/?url=#{url}").to_return(
        body: response("instagram_old"),
      )

      expect(Oneboxer.onebox(url, invalidate_oneboxes: true)).to include("iframe")
    end
  end

  describe "Twitter" do
    let(:url) { "https://twitter.com/discourse/status/1428031057186627589" }

    before do
      SiteSetting.twitter_consumer_key = "twitter_consumer_key"
      SiteSetting.twitter_consumer_secret = "twitter_consumer_secret"
    end

    it "works with rate limit" do
      stub_request(:head, "https://twitter.com/discourse/status/1428031057186627589").to_return(
        status: 200,
        body: "",
        headers: {
        },
      )

      stub_request(
        :get,
        "https://api.twitter.com/2/tweets/1428031057186627589?tweet.fields=id,author_id,text,created_at,entities,referenced_tweets,public_metrics&user.fields=id,name,username,profile_image_url&media.fields=type,height,width,variants,preview_image_url,url&expansions=attachments.media_keys,referenced_tweets.id.author_id",
      ).to_return(status: 429, body: "{}", headers: {})

      stub_request(:post, "https://api.twitter.com/oauth2/token").to_return(
        status: 200,
        body: "{\"access_token\":\"token\"}",
        headers: {
        },
      )

      expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to eq("")
      expect(Oneboxer.onebox(url, invalidate_oneboxes: true)).to eq("")
    end
  end

  describe "#apply" do
    it "generates valid HTML" do
      raw = "Before Onebox\nhttps://example.com\nAfter Onebox"
      cooked = Oneboxer.apply(PrettyText.cook(raw)) { "<div>onebox</div>" }
      doc = Nokogiri::HTML5.fragment(cooked.to_html)
      expect(doc.to_html).to match_html <<~HTML
        <p>Before Onebox</p>
        <div>onebox</div>
        <p>After Onebox</p>
      HTML

      raw = "Before Onebox\nhttps://example.com\nhttps://example.com\nAfter Onebox"
      cooked = Oneboxer.apply(PrettyText.cook(raw)) { "<div>onebox</div>" }
      doc = Nokogiri::HTML5.fragment(cooked.to_html)
      expect(doc.to_html).to match_html <<~HTML
        <p>Before Onebox</p>
        <div>onebox</div>
        <div>onebox</div>
        <p>After Onebox</p>
      HTML
    end

    it "does keeps SVGs valid" do
      raw = "Onebox\n\nhttps://example.com"
      cooked = PrettyText.cook(raw)
      cooked =
        Oneboxer.apply(Loofah.html5_fragment(cooked)) { "<div><svg><path></path></svg></div>" }
      doc = Nokogiri::HTML5.fragment(cooked.to_html)
      expect(doc.to_html).to match_html <<~HTML
        <p>Onebox</p>
        <div><svg><path></path></svg></div>
      HTML
    end
  end

  describe "#force_get_hosts" do
    it "includes Amazon sites" do
      expect(Oneboxer.force_get_hosts).to include("https://www.amazon.ca")
    end
  end

  describe "strategies" do
    it "has a 'default' strategy" do
      expect(Oneboxer.strategies.keys.first).to eq(:default)
    end

    it "has a strategy with overrides" do
      strategy = Oneboxer.strategies.keys[1]
      expect(Oneboxer.strategies[strategy].keys).not_to eq([])
    end

    context "when using a non-default strategy" do
      let(:hostname) { "my.interesting.site" }
      let(:url) { "https://#{hostname}/cool/content" }
      let(:html) { <<~HTML }
          <html>
          <head>
            <meta property="og:title" content="Page Title">
            <meta property="og:description" content="Here is some cool content">
          </head>
          <body>
             <p>body</p>
          </body>
          <html>
        HTML

      before do
        stub_request(:head, url).to_return(status: 509)
        stub_request(:get, url).to_return(status: 200, body: html)
      end

      after { Oneboxer.clear_preferred_strategy!(hostname) }

      it "uses multiple strategies" do
        default_ordered = Oneboxer.strategies.keys
        custom_ordered = Oneboxer.ordered_strategies(hostname)
        expect(custom_ordered).to eq(default_ordered)

        expect(Oneboxer.preferred_strategy(hostname)).to eq(nil)
        expect(Oneboxer.preview(url, invalidate_oneboxes: true)).to include(
          "Here is some cool content",
        )

        custom_ordered = Oneboxer.ordered_strategies(hostname)

        expect(custom_ordered.count).to eq(default_ordered.count)
        expect(custom_ordered).not_to eq(default_ordered)

        expect(Oneboxer.preferred_strategy(hostname)).not_to eq(:default)
      end
    end
  end

  describe "register_local_handler" do
    it "calls registered local handler" do
      Oneboxer.register_local_handler("wizard") { |url, route| "Custom Onebox for Wizard" }

      url = "#{Discourse.base_url}/wizard"
      expect(Oneboxer.preview(url)).to eq("Custom Onebox for Wizard")
    end
  end
end