# == Schema Information
#
# Table name: notes
#
#  id            :integer          not null, primary key
#  note          :text
#  noteable_type :string(255)
#  author_id     :integer
#  created_at    :datetime
#  updated_at    :datetime
#  project_id    :integer
#  attachment    :string(255)
#  line_code     :string(255)
#  commit_id     :string(255)
#  noteable_id   :integer
#  system        :boolean          default(FALSE), not null
#  st_diff       :text
#

require 'spec_helper'

describe Note do
  describe "Associations" do
    it { is_expected.to belong_to(:project) }
    it { is_expected.to belong_to(:noteable) }
    it { is_expected.to belong_to(:author).class_name('User') }
  end

  describe "Mass assignment" do
  end

  describe "Validation" do
    it { is_expected.to validate_presence_of(:note) }
    it { is_expected.to validate_presence_of(:project) }
  end

  describe "Voting score" do
    let(:project) { create(:project) }

    it "recognizes a neutral note" do
      note = create(:votable_note, note: "This is not a +1 note")
      expect(note).not_to be_upvote
      expect(note).not_to be_downvote
    end

    it "recognizes a neutral emoji note" do
      note = build(:votable_note, note: "I would :+1: this, but I don't want to")
      expect(note).not_to be_upvote
      expect(note).not_to be_downvote
    end

    it "recognizes a +1 note" do
      note = create(:votable_note, note: "+1 for this")
      expect(note).to be_upvote
    end

    it "recognizes a +1 emoji as a vote" do
      note = build(:votable_note, note: ":+1: for this")
      expect(note).to be_upvote
    end

    it "recognizes a thumbsup emoji as a vote" do
      note = build(:votable_note, note: ":thumbsup: for this")
      expect(note).to be_upvote
    end

    it "recognizes a -1 note" do
      note = create(:votable_note, note: "-1 for this")
      expect(note).to be_downvote
    end

    it "recognizes a -1 emoji as a vote" do
      note = build(:votable_note, note: ":-1: for this")
      expect(note).to be_downvote
    end

    it "recognizes a thumbsdown emoji as a vote" do
      note = build(:votable_note, note: ":thumbsdown: for this")
      expect(note).to be_downvote
    end
  end

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

  describe "Commit notes" do
    let!(:note) { create(:note_on_commit, note: "+1 from me") }
    let!(:commit) { note.noteable }

    it "should be accessible through #noteable" do
      expect(note.commit_id).to eq(commit.id)
      expect(note.noteable).to be_a(Commit)
      expect(note.noteable).to eq(commit)
    end

    it "should save a valid note" do
      expect(note.commit_id).to eq(commit.id)
      note.noteable == commit
    end

    it "should be recognized by #for_commit?" do
      expect(note).to be_for_commit
    end

    it "should not be votable" do
      expect(note).not_to be_votable
    end
  end

  describe "Commit diff line notes" do
    let!(:note) { create(:note_on_commit_diff, note: "+1 from me") }
    let!(:commit) { note.noteable }

    it "should save a valid note" do
      expect(note.commit_id).to eq(commit.id)
      expect(note.noteable.id).to eq(commit.id)
    end

    it "should be recognized by #for_diff_line?" do
      expect(note).to be_for_diff_line
    end

    it "should be recognized by #for_commit_diff_line?" do
      expect(note).to be_for_commit_diff_line
    end

    it "should not be votable" do
      expect(note).not_to be_votable
    end
  end

  describe "Issue notes" do
    let!(:note) { create(:note_on_issue, note: "+1 from me") }

    it "should not be votable" do
      expect(note).to be_votable
    end
  end

  describe "Merge request notes" do
    let!(:note) { create(:note_on_merge_request, note: "+1 from me") }

    it "should be votable" do
      expect(note).to be_votable
    end
  end

  describe "Merge request diff line notes" do
    let!(:note) { create(:note_on_merge_request_diff, note: "+1 from me") }

    it "should not be votable" do
      expect(note).not_to be_votable
    end
  end

  describe '#create_status_change_note' do
    let(:project) { create(:project) }
    let(:thing) { create(:issue, project: project) }
    let(:author) { create(:user) }
    let(:status) { 'new_status' }

    subject { Note.create_status_change_note(thing, project, author, status, nil) }

    it 'creates and saves a Note' do
      is_expected.to be_a Note
      expect(subject.id).not_to be_nil
    end

    describe '#noteable' do
      subject { super().noteable }
      it { is_expected.to eq(thing) }
    end

    describe '#project' do
      subject { super().project }
      it { is_expected.to eq(thing.project) }
    end

    describe '#author' do
      subject { super().author }
      it { is_expected.to eq(author) }
    end

    describe '#note' do
      subject { super().note }
      it { is_expected.to eq("Status changed to #{status}") }
    end

    it 'appends a back-reference if a closing mentionable is supplied' do
      commit = double('commit', gfm_reference: 'commit 123456')
      n = Note.create_status_change_note(thing, project, author, status, commit)

      expect(n.note).to eq("Status changed to #{status} by commit 123456")
    end
  end

  describe '#create_assignee_change_note' do
    let(:project) { create(:project) }
    let(:thing) { create(:issue, project: project) }
    let(:author) { create(:user) }
    let(:assignee) { create(:user, username: "assigned_user") }

    subject { Note.create_assignee_change_note(thing, project, author, assignee) }

    context 'creates and saves a Note' do
      it { is_expected.to be_a Note }

      describe '#id' do
        subject { super().id }
        it { is_expected.not_to be_nil }
      end
    end

    describe '#noteable' do
      subject { super().noteable }
      it { is_expected.to eq(thing) }
    end

    describe '#project' do
      subject { super().project }
      it { is_expected.to eq(thing.project) }
    end

    describe '#author' do
      subject { super().author }
      it { is_expected.to eq(author) }
    end

    describe '#note' do
      subject { super().note }
      it { is_expected.to eq('Reassigned to @assigned_user') }
    end

    context 'assignee is removed' do
      let(:assignee) { nil }

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq('Assignee removed') }
      end
    end
  end

  describe '#create_labels_change_note' do
    let(:project) { create(:project) }
    let(:thing) { create(:issue, project: project) }
    let(:author) { create(:user) }
    let(:label1) { create(:label) }
    let(:label2) { create(:label) }
    let(:added_labels) { [label1, label2] }
    let(:removed_labels) { [] }

    subject { Note.create_labels_change_note(thing, project, author, added_labels, removed_labels) }

    context 'creates and saves a Note' do
      it { is_expected.to be_a Note }

      describe '#id' do
        subject { super().id }
        it { is_expected.not_to be_nil }
      end
    end

    describe '#noteable' do
      subject { super().noteable }
      it { is_expected.to eq(thing) }
    end

    describe '#project' do
      subject { super().project }
      it { is_expected.to eq(thing.project) }
    end

    describe '#author' do
      subject { super().author }
      it { is_expected.to eq(author) }
    end

    describe '#note' do
      subject { super().note }
      it { is_expected.to eq("Added ~#{label1.id} ~#{label2.id} labels") }
    end

    context 'label is removed' do
      let(:added_labels) { [label1]  }
      let(:removed_labels) { [label2] }

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("Added ~#{label1.id} and removed ~#{label2.id} labels") }
      end
    end
  end

  describe '#create_milestone_change_note' do
    let(:project) { create(:project) }
    let(:thing) { create(:issue, project: project) }
    let(:milestone) { create(:milestone, project: project, title: "first_milestone") }
    let(:author) { create(:user) }

    subject { Note.create_milestone_change_note(thing, project, author, milestone) }

    context 'creates and saves a Note' do
      it { is_expected.to be_a Note }

      describe '#id' do
        subject { super().id }
        it { is_expected.not_to be_nil }
      end
    end

    describe '#project' do
      subject { super().project }
      it { is_expected.to eq(thing.project) }
    end

    describe '#author' do
      subject { super().author }
      it { is_expected.to eq(author) }
    end

    describe '#note' do
      subject { super().note }
      it { is_expected.to eq("Milestone changed to first_milestone") }
    end
  end

  describe '#create_cross_reference_note' do
    let(:project)    { create(:project) }
    let(:author)     { create(:user) }
    let(:issue)      { create(:issue, project: project) }
    let(:mergereq)   { create(:merge_request, :simple, target_project: project, source_project: project) }
    let(:commit)     { project.commit }

    # Test all of {issue, merge request, commit} in both the referenced and referencing
    # roles, to ensure that the correct information can be inferred from any argument.

    context 'issue from a merge request' do
      subject { Note.create_cross_reference_note(issue, mergereq, author) }

      it { is_expected.to be_valid }

      describe '#noteable' do
        subject { super().noteable }
        it { is_expected.to eq(issue) }
      end

      describe '#project' do
        subject { super().project }
        it { is_expected.to eq(issue.project) }
      end

      describe '#author' do
        subject { super().author }
        it { is_expected.to eq(author) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in merge request !#{mergereq.iid}") }
      end
    end

    context 'issue from a commit' do
      subject { Note.create_cross_reference_note(issue, commit, author) }

      it { is_expected.to be_valid }

      describe '#noteable' do
        subject { super().noteable }
        it { is_expected.to eq(issue) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in commit #{commit.sha}") }
      end
    end

    context 'merge request from an issue' do
      subject { Note.create_cross_reference_note(mergereq, issue, author) }

      it { is_expected.to be_valid }

      describe '#noteable' do
        subject { super().noteable }
        it { is_expected.to eq(mergereq) }
      end

      describe '#project' do
        subject { super().project }
        it { is_expected.to eq(mergereq.project) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in issue ##{issue.iid}") }
      end
    end

    context 'commit from a merge request' do
      subject { Note.create_cross_reference_note(commit, mergereq, author) }

      it { is_expected.to be_valid }

      describe '#noteable' do
        subject { super().noteable }
        it { is_expected.to eq(commit) }
      end

      describe '#project' do
        subject { super().project }
        it { is_expected.to eq(project) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in merge request !#{mergereq.iid}") }
      end
    end

    context 'commit contained in a merge request' do
      subject { Note.create_cross_reference_note(mergereq.commits.first, mergereq, author) }

      it { is_expected.to be_nil }
    end

    context 'commit from issue' do
      subject { Note.create_cross_reference_note(commit, issue, author) }

      it { is_expected.to be_valid }

      describe '#noteable_type' do
        subject { super().noteable_type }
        it { is_expected.to eq("Commit") }
      end

      describe '#noteable_id' do
        subject { super().noteable_id }
        it { is_expected.to be_nil }
      end

      describe '#commit_id' do
        subject { super().commit_id }
        it { is_expected.to eq(commit.id) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in issue ##{issue.iid}") }
      end
    end

    context 'commit from commit' do
      let(:parent_commit) { commit.parents.first }
      subject { Note.create_cross_reference_note(commit, parent_commit, author) }

      it { is_expected.to be_valid }

      describe '#noteable_type' do
        subject { super().noteable_type }
        it { is_expected.to eq("Commit") }
      end

      describe '#noteable_id' do
        subject { super().noteable_id }
        it { is_expected.to be_nil }
      end

      describe '#commit_id' do
        subject { super().commit_id }
        it { is_expected.to eq(commit.id) }
      end

      describe '#note' do
        subject { super().note }
        it { is_expected.to eq("mentioned in commit #{parent_commit.id}") }
      end
    end
  end

  describe '#cross_reference_exists?' do
    let(:project) { create :project }
    let(:author) { create :user }
    let(:issue) { create :issue }
    let(:commit0) { project.commit }
    let(:commit1) { project.commit('HEAD~2') }

    before do
      Note.create_cross_reference_note(issue, commit0, author)
    end

    it 'detects if a mentionable has already been mentioned' do
      expect(Note.cross_reference_exists?(issue, commit0)).to be_truthy
    end

    it 'detects if a mentionable has not already been mentioned' do
      expect(Note.cross_reference_exists?(issue, commit1)).to be_falsey
    end

    context 'commit on commit' do
      before do
        Note.create_cross_reference_note(commit0, commit1, author)
      end

      it { expect(Note.cross_reference_exists?(commit0, commit1)).to be_truthy }
      it { expect(Note.cross_reference_exists?(commit1, commit0)).to be_falsey }
    end

    context 'legacy note with Markdown emphasis' do
      let(:issue2) { create :issue, project: project }
      let!(:note) do
        create :note, system: true, noteable_id: issue2.id,
                      noteable_type: "Issue", note: "_mentioned in issue " \
                      "#{issue.project.path_with_namespace}##{issue.iid}_"
      end

      it 'detects if a mentionable with emphasis has been mentioned' do
        expect(Note.cross_reference_exists?(issue2, issue)).to be_truthy
      end
    end
  end

  describe '#cross_references_with_underscores?' do
    let(:project) { create :project, path: "first_project" }
    let(:second_project) { create :project, path: "second_project" }

    let(:author) { create :user }
    let(:issue0) { create :issue, project: project }
    let(:issue1) { create :issue, project: second_project }
    let!(:note) { Note.create_cross_reference_note(issue0, issue1, author) }

    it 'detects if a mentionable has already been mentioned' do
      expect(Note.cross_reference_exists?(issue0, issue1)).to be_truthy
    end

    it 'detects if a mentionable has not already been mentioned' do
      expect(Note.cross_reference_exists?(issue1, issue0)).to be_falsey
    end

    it 'detects that text has underscores' do
      expect(note.note).to eq("mentioned in issue #{second_project.path_with_namespace}##{issue1.iid}")
    end
  end

  describe '#system?' do
    let(:project) { create(:project) }
    let(:issue)   { create(:issue, project: project) }
    let(:other)   { create(:issue, project: project) }
    let(:author)  { create(:user) }
    let(:assignee) { create(:user) }
    let(:label) { create(:label) }
    let(:milestone) { create(:milestone) }

    it 'should recognize user-supplied notes as non-system' do
      @note = create(:note_on_issue)
      expect(@note).not_to be_system
    end

    it 'should identify status-change notes as system notes' do
      @note = Note.create_status_change_note(issue, project, author, 'closed', nil)
      expect(@note).to be_system
    end

    it 'should identify cross-reference notes as system notes' do
      @note = Note.create_cross_reference_note(issue, other, author)
      expect(@note).to be_system
    end

    it 'should identify assignee-change notes as system notes' do
      @note = Note.create_assignee_change_note(issue, project, author, assignee)
      expect(@note).to be_system
    end

    it 'should identify label-change notes as system notes' do
      @note = Note.create_labels_change_note(issue, project, author, [label], [])
      expect(@note).to be_system
    end

    it 'should identify milestone-change notes as system notes' do
      @note = Note.create_milestone_change_note(issue, project, author, milestone)
      expect(@note).to be_system
    end
  end

  describe :authorization do
    before do
      @p1 = create(:project)
      @p2 = create(:project)
      @u1 = create(:user)
      @u2 = create(:user)
      @u3 = create(:user)
      @abilities = Six.new
      @abilities << Ability
    end

    describe :read do
      before do
        @p1.project_members.create(user: @u2, access_level: ProjectMember::GUEST)
        @p2.project_members.create(user: @u3, access_level: ProjectMember::GUEST)
      end

      it { expect(@abilities.allowed?(@u1, :read_note, @p1)).to be_falsey }
      it { expect(@abilities.allowed?(@u2, :read_note, @p1)).to be_truthy }
      it { expect(@abilities.allowed?(@u3, :read_note, @p1)).to be_falsey }
    end

    describe :write do
      before do
        @p1.project_members.create(user: @u2, access_level: ProjectMember::DEVELOPER)
        @p2.project_members.create(user: @u3, access_level: ProjectMember::DEVELOPER)
      end

      it { expect(@abilities.allowed?(@u1, :write_note, @p1)).to be_falsey }
      it { expect(@abilities.allowed?(@u2, :write_note, @p1)).to be_truthy }
      it { expect(@abilities.allowed?(@u3, :write_note, @p1)).to be_falsey }
    end

    describe :admin do
      before do
        @p1.project_members.create(user: @u1, access_level: ProjectMember::REPORTER)
        @p1.project_members.create(user: @u2, access_level: ProjectMember::MASTER)
        @p2.project_members.create(user: @u3, access_level: ProjectMember::MASTER)
      end

      it { expect(@abilities.allowed?(@u1, :admin_note, @p1)).to be_falsey }
      it { expect(@abilities.allowed?(@u2, :admin_note, @p1)).to be_truthy }
      it { expect(@abilities.allowed?(@u3, :admin_note, @p1)).to be_falsey }
    end
  end

  it_behaves_like 'an editable mentionable' do
    subject { create :note, noteable: issue, project: project }

    let(:issue) { create :issue, project: project }
    let(:backref_text) { issue.gfm_reference }
    let(:set_mentionable_text) { ->(txt) { subject.note = txt } }
  end
end