require "spec_helper"

describe GitlabMarkdownHelper do
  include ApplicationHelper
  include IssuesHelper

  let!(:project) { create(:project) }

  let(:user)          { create(:user, username: 'gfm') }
  let(:commit)        { project.repository.commit }
  let(:issue)         { create(:issue, project: project) }
  let(:merge_request) { create(:merge_request, source_project: project, target_project: project) }
  let(:snippet)       { create(:project_snippet, project: project) }
  let(:member)        { project.users_projects.where(user_id: user).first }

  before do
    # Helper expects a @project instance variable
    @project = project
    @repository = project.repository
  end

  describe "#gfm" do
    it "should return unaltered text if project is nil" do
      actual = "Testing references: ##{issue.iid}"

      gfm(actual).should_not == actual

      @project = nil
      gfm(actual).should == actual
    end

    it "should not alter non-references" do
      actual = expected = "_Please_ *stop* 'helping' and all the other b*$#%' you do."
      gfm(actual).should == expected
    end

    it "should not touch HTML entities" do
      @project.issues.stub(:where).with(id: '39').and_return([issue])
      actual = expected = "We&#39;ll accept good pull requests."
      gfm(actual).should == expected
    end

    it "should forward HTML options to links" do
      gfm("Fixed in #{commit.id}", class: "foo").should have_selector("a.gfm.foo")
    end

    describe "referencing a commit" do
      let(:expected) { project_commit_path(project, commit) }

      it "should link using a full id" do
        actual = "Reverts #{commit.id}"
        gfm(actual).should match(expected)
      end

      it "should link using a short id" do
        actual = "Backported from #{commit.short_id(6)}"
        gfm(actual).should match(expected)
      end

      it "should link with adjacent text" do
        actual = "Reverted (see #{commit.id})"
        gfm(actual).should match(expected)
      end

      it "should keep whitespace intact" do
        actual   = "Changes #{commit.id} dramatically"
        expected = /Changes <a.+>#{commit.id}<\/a> dramatically/
        gfm(actual).should match(expected)
      end

      it "should not link with an invalid id" do
        actual = expected = "What happened in #{commit.id.reverse}"
        gfm(actual).should == expected
      end

      it "should include a title attribute" do
        actual = "Reverts #{commit.id}"
        gfm(actual).should match(/title="#{commit.link_title}"/)
      end

      it "should include standard gfm classes" do
        actual = "Reverts #{commit.id}"
        gfm(actual).should match(/class="\s?gfm gfm-commit\s?"/)
      end
    end

    describe "referencing a team member" do
      let(:actual)   { "@#{user.username} you are right." }
      let(:expected) { user_path(user) }

      before do
        project.team << [user, :master]
      end

      it "should link using a simple name" do
        gfm(actual).should match(expected)
      end

      it "should link using a name with dots" do
        user.update_attributes(name: "alphA.Beta")
        gfm(actual).should match(expected)
      end

      it "should link using name with underscores" do
        user.update_attributes(name: "ping_pong_king")
        gfm(actual).should match(expected)
      end

      it "should link with adjacent text" do
        actual = "Mail the admin (@#{user.username})"
        gfm(actual).should match(expected)
      end

      it "should keep whitespace intact" do
        actual   = "Yes, @#{user.username} is right."
        expected = /Yes, <a.+>@#{user.username}<\/a> is right/
        gfm(actual).should match(expected)
      end

      it "should not link with an invalid id" do
        actual = expected = "@#{user.username.reverse} you are right."
        gfm(actual).should == expected
      end

      it "should include standard gfm classes" do
        gfm(actual).should match(/class="\s?gfm gfm-team_member\s?"/)
      end
    end

    # Shared examples for referencing an object
    #
    # Expects the following attributes to be available in the example group:
    #
    # - object    - The object itself
    # - reference - The object reference string (e.g., #1234, $1234, !1234)
    #
    # Currently limited to Snippets, Issues and MergeRequests
    shared_examples 'referenced object' do
      let(:actual)   { "Reference to #{reference}" }
      let(:expected) { polymorphic_path([project, object]) }

      it "should link using a valid id" do
        gfm(actual).should match(expected)
      end

      it "should link with adjacent text" do
        # Wrap the reference in parenthesis
        gfm(actual.gsub(reference, "(#{reference})")).should match(expected)

        # Append some text to the end of the reference
        gfm(actual.gsub(reference, "#{reference}, right?")).should match(expected)
      end

      it "should keep whitespace intact" do
        actual   = "Referenced #{reference} already."
        expected = /Referenced <a.+>[^\s]+<\/a> already/
        gfm(actual).should match(expected)
      end

      it "should not link with an invalid id" do
        # Modify the reference string so it's still parsed, but is invalid
        reference.gsub!(/^(.)(\d+)$/, '\1' + ('\2' * 2))
        gfm(actual).should == actual
      end

      it "should include a title attribute" do
        title = "#{object.class.to_s.titlecase}: #{object.title}"
        gfm(actual).should match(/title="#{title}"/)
      end

      it "should include standard gfm classes" do
        css = object.class.to_s.underscore
        gfm(actual).should match(/class="\s?gfm gfm-#{css}\s?"/)
      end
    end

    describe "referencing an issue" do
      let(:object)    { issue }
      let(:reference) { "##{issue.iid}" }

      include_examples 'referenced object'
    end

    describe "referencing a merge request" do
      let(:object)    { merge_request }
      let(:reference) { "!#{merge_request.iid}" }

      include_examples 'referenced object'
    end

    describe "referencing a snippet" do
      let(:object)    { snippet }
      let(:reference) { "$#{snippet.id}" }
      let(:actual)   { "Reference to #{reference}" }
      let(:expected) { project_snippet_path(project, object) }

      it "should link using a valid id" do
        gfm(actual).should match(expected)
      end

      it "should link with adjacent text" do
        # Wrap the reference in parenthesis
        gfm(actual.gsub(reference, "(#{reference})")).should match(expected)

        # Append some text to the end of the reference
        gfm(actual.gsub(reference, "#{reference}, right?")).should match(expected)
      end

      it "should keep whitespace intact" do
        actual   = "Referenced #{reference} already."
        expected = /Referenced <a.+>[^\s]+<\/a> already/
        gfm(actual).should match(expected)
      end

      it "should not link with an invalid id" do
        # Modify the reference string so it's still parsed, but is invalid
        reference.gsub!(/^(.)(\d+)$/, '\1' + ('\2' * 2))
        gfm(actual).should == actual
      end

      it "should include a title attribute" do
        title = "Snippet: #{object.title}"
        gfm(actual).should match(/title="#{title}"/)
      end

      it "should include standard gfm classes" do
        css = object.class.to_s.underscore
        gfm(actual).should match(/class="\s?gfm gfm-snippet\s?"/)
      end

    end

    describe "referencing multiple objects" do
      let(:actual) { "!#{merge_request.iid} -> #{commit.id} -> ##{issue.iid}" }

      it "should link to the merge request" do
        expected = project_merge_request_path(project, merge_request)
        gfm(actual).should match(expected)
      end

      it "should link to the commit" do
        expected = project_commit_path(project, commit)
        gfm(actual).should match(expected)
      end

      it "should link to the issue" do
        expected = project_issue_path(project, issue)
        gfm(actual).should match(expected)
      end
    end

    describe "emoji" do
      it "matches at the start of a string" do
        gfm(":+1:").should match(/<img/)
      end

      it "matches at the end of a string" do
        gfm("This gets a :-1:").should match(/<img/)
      end

      it "matches with adjacent text" do
        gfm("+1 (:+1:)").should match(/<img/)
      end

      it "has a title attribute" do
        gfm(":-1:").should match(/title=":-1:"/)
      end

      it "has an alt attribute" do
        gfm(":-1:").should match(/alt=":-1:"/)
      end

      it "has an emoji class" do
        gfm(":+1:").should match('class="emoji"')
      end

      it "sets height and width" do
        actual = gfm(":+1:")
        actual.should match(/width="20"/)
        actual.should match(/height="20"/)
      end

      it "keeps whitespace intact" do
        gfm("This deserves a :+1: big time.").should match(/deserves a <img.+\/> big time/)
      end

      it "ignores invalid emoji" do
        gfm(":invalid-emoji:").should_not match(/<img/)
      end

      it "should work independent of reference links (i.e. without @project being set)" do
        @project = nil
        gfm(":+1:").should match(/<img/)
      end
    end
  end

  describe "#link_to_gfm" do
    let(:commit_path) { project_commit_path(project, commit) }
    let(:issues)      { create_list(:issue, 2, project: project) }

    it "should handle references nested in links with all the text" do
      actual = link_to_gfm("This should finally fix ##{issues[0].iid} and ##{issues[1].iid} for real", commit_path)

      # Break the result into groups of links with their content, without
      # closing tags
      groups = actual.split("</a>")

      # Leading commit link
      groups[0].should match(/href="#{commit_path}"/)
      groups[0].should match(/This should finally fix $/)

      # First issue link
      groups[1].should match(/href="#{project_issue_url(project, issues[0])}"/)
      groups[1].should match(/##{issues[0].iid}$/)

      # Internal commit link
      groups[2].should match(/href="#{commit_path}"/)
      groups[2].should match(/ and /)

      # Second issue link
      groups[3].should match(/href="#{project_issue_url(project, issues[1])}"/)
      groups[3].should match(/##{issues[1].iid}$/)

      # Trailing commit link
      groups[4].should match(/href="#{commit_path}"/)
      groups[4].should match(/ for real$/)
    end

    it "should forward HTML options" do
      actual = link_to_gfm("Fixed in #{commit.id}", commit_path, class: 'foo')
      actual.should have_selector 'a.gfm.gfm-commit.foo'
    end

    it "escapes HTML passed in as the body" do
      actual = "This is a <h1>test</h1> - see ##{issues[0].iid}"
      link_to_gfm(actual, commit_path).should match('&lt;h1&gt;test&lt;/h1&gt;')
    end
  end

  describe "#markdown" do
    it "should handle references in paragraphs" do
      actual = "\n\nLorem ipsum dolor sit amet. #{commit.id} Nam pulvinar sapien eget.\n"
      expected = project_commit_path(project, commit)
      markdown(actual).should match(expected)
    end

    it "should handle references in headers" do
      actual = "\n# Working around ##{issue.iid}\n## Apply !#{merge_request.iid}"

      markdown(actual, {no_header_anchors:true}).should match(%r{<h1[^<]*>Working around <a.+>##{issue.iid}</a></h1>})
      markdown(actual, {no_header_anchors:true}).should match(%r{<h2[^<]*>Apply <a.+>!#{merge_request.iid}</a></h2>})
    end

    it "should add ids and links to headers" do
      # Test every rule except nested tags.
      text = '..Ab_c-d. e..'
      id = 'ab_c-d-e'
      markdown("# #{text}").should match(%r{<h1 id="#{id}">#{text}<a href="[^"]*##{id}"></a></h1>})
      markdown("# #{text}", {no_header_anchors:true}).should == "<h1>#{text}</h1>"

      id = 'link-text'
      markdown("# [link text](url) ![img alt](url)").should match(
        %r{<h1 id="#{id}"><a href="[^"]*url">link text</a> <img[^>]*><a href="[^"]*##{id}"></a></h1>}
      )
    end

    it "should handle references in lists" do
      project.team << [user, :master]

      actual = "\n* dark: ##{issue.iid}\n* light by @#{member.user.username}"

      markdown(actual).should match(%r{<li>dark: <a.+>##{issue.iid}</a></li>})
      markdown(actual).should match(%r{<li>light by <a.+>@#{member.user.username}</a></li>})
    end

    it "should handle references in <em>" do
      actual = "Apply _!#{merge_request.iid}_ ASAP"

      markdown(actual).should match(%r{Apply <em><a.+>!#{merge_request.iid}</a></em>})
    end

    it "should handle tables" do
      actual = %Q{| header 1 | header 2 |
| -------- | -------- |
| cell 1   | cell 2   |
| cell 3   | cell 4   |}

      markdown(actual).should match(/\A<table/)
    end

    it "should leave code blocks untouched" do
      helper.stub(:user_color_scheme_class).and_return(:white)

      target_html = "\n<div class=\"highlighted-data white\">\n  <div class=\"highlight\">\n    <pre><code class=\"\">some code from $#{snippet.id}\nhere too\n</code></pre>\n  </div>\n</div>\n\n"

      helper.markdown("\n    some code from $#{snippet.id}\n    here too\n").should == target_html
      helper.markdown("\n```\nsome code from $#{snippet.id}\nhere too\n```\n").should == target_html
    end

    it "should leave inline code untouched" do
      markdown("\nDon't use `$#{snippet.id}` here.\n").should == "<p>Don&#39;t use <code>$#{snippet.id}</code> here.</p>\n"
    end

    it "should leave ref-like autolinks untouched" do
      markdown("look at http://example.tld/#!#{merge_request.iid}").should == "<p>look at <a href=\"http://example.tld/#!#{merge_request.iid}\">http://example.tld/#!#{merge_request.iid}</a></p>\n"
    end

    it "should leave ref-like href of 'manual' links untouched" do
      markdown("why not [inspect !#{merge_request.iid}](http://example.tld/#!#{merge_request.iid})").should == "<p>why not <a href=\"http://example.tld/#!#{merge_request.iid}\">inspect </a><a class=\"gfm gfm-merge_request \" href=\"#{project_merge_request_url(project, merge_request)}\" title=\"Merge Request: #{merge_request.title}\">!#{merge_request.iid}</a><a href=\"http://example.tld/#!#{merge_request.iid}\"></a></p>\n"
    end

    it "should leave ref-like src of images untouched" do
      markdown("screen shot: ![some image](http://example.tld/#!#{merge_request.iid})").should == "<p>screen shot: <img src=\"http://example.tld/#!#{merge_request.iid}\" alt=\"some image\"></p>\n"
    end

    it "should generate absolute urls for refs" do
      markdown("##{issue.iid}").should include(project_issue_url(project, issue))
    end

    it "should generate absolute urls for emoji" do
      markdown(":smile:").should include("src=\"#{url_to_image("emoji/smile")}")
    end

    it "should handle relative urls for a file in master" do
      actual = "[GitLab API doc](doc/api/README.md)\n"
      expected = "<p><a href=\"/#{project.path_with_namespace}/blob/master/doc/api/README.md\">GitLab API doc</a></p>\n"
      markdown(actual).should match(expected)
    end

    it "should handle relative urls for a directory in master" do
      actual = "[GitLab API doc](doc/api)\n"
      expected = "<p><a href=\"/#{project.path_with_namespace}/tree/master/doc/api\">GitLab API doc</a></p>\n"
      markdown(actual).should match(expected)
    end

    it "should handle absolute urls" do
      actual = "[GitLab](https://www.gitlab.com)\n"
      expected = "<p><a href=\"https://www.gitlab.com\">GitLab</a></p>\n"
      markdown(actual).should match(expected)
    end

    it "should handle relative urls in reference links for a file in master" do
      actual = "[GitLab API doc][GitLab readme]\n [GitLab readme]: doc/api/README.md\n"
      expected = "<p><a href=\"/#{project.path_with_namespace}/blob/master/doc/api/README.md\">GitLab API doc</a></p>\n"
      markdown(actual).should match(expected)
    end

    it "should handle relative urls in reference links for a directory in master" do
      actual = "[GitLab API doc directory][GitLab readmes]\n [GitLab readmes]: doc/api/\n"
      expected = "<p><a href=\"/#{project.path_with_namespace}/tree/master/doc/api\">GitLab API doc directory</a></p>\n"
      markdown(actual).should match(expected)
    end

     it "should not handle malformed relative urls in reference links for a file in master" do
      actual = "[GitLab readme]: doc/api/README.md\n"
      expected = ""
      markdown(actual).should match(expected)
    end
  end

  describe "#render_wiki_content" do
    before do
      @wiki = double('WikiPage')
      @wiki.stub(:content).and_return('wiki content')
    end

    it "should use GitLab Flavored Markdown for markdown files" do
      @wiki.stub(:format).and_return(:markdown)

      helper.should_receive(:markdown).with('wiki content')

      helper.render_wiki_content(@wiki)
    end

    it "should use the Gollum renderer for all other file types" do
      @wiki.stub(:format).and_return(:rdoc)
      formatted_content_stub = double('formatted_content')
      formatted_content_stub.should_receive(:html_safe)
      @wiki.stub(:formatted_content).and_return(formatted_content_stub)

      helper.render_wiki_content(@wiki)
    end
  end
end
