summaryrefslogtreecommitdiff
path: root/app/models/discussion.rb
blob: de06c13481a1899aa80110139bbd6b700f6091b7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
class Discussion
  NUMBER_OF_TRUNCATED_DIFF_LINES = 16

  attr_reader :notes

  delegate  :created_at,
            :project,
            :author,

            :noteable,
            :for_commit?,
            :for_merge_request?,

            :line_code,
            :original_line_code,
            :diff_file,
            :for_line?,
            :active?,

            to: :first_note

  delegate  :resolved_at,
            :resolved_by,

            to: :last_resolved_note,
            allow_nil: true

  delegate :blob, :highlighted_diff_lines, to: :diff_file, allow_nil: true

  def self.for_notes(notes)
    notes.group_by(&:discussion_id).values.map { |notes| new(notes) }
  end

  def self.for_diff_notes(notes)
    notes.group_by(&:line_code).values.map { |notes| new(notes) }
  end

  def initialize(notes)
    @notes = notes
  end

  def last_resolved_note
    return unless resolved?

    @last_resolved_note ||= resolved_notes.sort_by(&:resolved_at).last
  end

  def last_updated_at
    last_note.created_at
  end

  def last_updated_by
    last_note.author
  end

  def id
    first_note.discussion_id
  end

  alias_method :to_param, :id

  def diff_discussion?
    first_note.diff_note?
  end

  def legacy_diff_discussion?
    notes.any?(&:legacy_diff_note?)
  end

  def resolvable?
    return @resolvable if @resolvable.present?

    @resolvable = diff_discussion? && notes.any?(&:resolvable?)
  end

  def resolved?
    return @resolved if @resolved.present?

    @resolved = resolvable? && notes.none?(&:to_be_resolved?)
  end

  def first_note
    @first_note ||= @notes.first
  end

  def last_note
    @last_note ||= @notes.last
  end

  def resolved_notes
    notes.select(&:resolved?)
  end

  def to_be_resolved?
    resolvable? && !resolved?
  end

  def can_resolve?(current_user)
    return false unless current_user
    return false unless resolvable?

    current_user == self.noteable.author ||
      current_user.can?(:resolve_note, self.project)
  end

  def resolve!(current_user)
    return unless resolvable?

    update { |notes| notes.resolve!(current_user) }
  end

  def unresolve!
    return unless resolvable?

    update { |notes| notes.unresolve! }
  end

  def for_target?(target)
    self.noteable == target && !diff_discussion?
  end

  def active?
    return @active if @active.present?

    @active = first_note.active?
  end

  def collapsed?
    return false unless diff_discussion?

    if resolvable?
      # New diff discussions only disappear once they are marked resolved
      resolved?
    else
      # Old diff discussions disappear once they become outdated
      !active?
    end
  end

  def expanded?
    !collapsed?
  end

  def reply_attributes
    data = {
      noteable_type: first_note.noteable_type,
      noteable_id:   first_note.noteable_id,
      commit_id:     first_note.commit_id,
      discussion_id: self.id,
    }

    if diff_discussion?
      data[:note_type] = first_note.type

      data.merge!(first_note.diff_attributes)
    end

    data
  end

  # Returns an array of at most 16 highlighted lines above a diff note
  def truncated_diff_lines
    prev_lines = []

    highlighted_diff_lines.each do |line|
      if line.meta?
        prev_lines.clear
      else
        prev_lines << line

        break if for_line?(line)

        prev_lines.shift if prev_lines.length >= NUMBER_OF_TRUNCATED_DIFF_LINES
      end
    end

    prev_lines
  end

  private

  def update
    notes_relation = DiffNote.where(id: notes.map(&:id)).fresh
    yield(notes_relation)

    # Set the notes array to the updated notes
    @notes = notes_relation.to_a

    # Reset the memoized values
    @last_resolved_note = @resolvable = @resolved = @first_note = @last_note = nil
  end
end