Class: SprintBurndown

Inherits:
ChartBase show all
Defined in:
lib/jirametrics/sprint_burndown.rb

Instance Attribute Summary collapse

Attributes inherited from ChartBase

#aggregated_project, #all_boards, #canvas_height, #canvas_width, #data_quality, #date_range, #file_system, #holiday_dates, #issues, #settings, #time_range, #timezone_offset

Instance Method Summary collapse

Methods inherited from ChartBase

#aggregated_project?, #canvas, #canvas_responsive?, #chart_format, #collapsible_issues_panel, #color_block, #color_for, #completed_issues_in_range, #current_board, #daily_chart_dataset, #describe_non_working_days, #description_text, #format_integer, #format_status, #header_text, #holidays, #html_directory, #icon_span, #label_days, #label_issues, #link_to_issue, #next_id, #random_color, #render, #render_top_text, #status_category_color, #wrap_and_render

Constructor Details

#initialize ⇒ SprintBurndown

Returns a new instance of SprintBurndown.



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# File 'lib/jirametrics/sprint_burndown.rb', line 20

def initialize
  super

  @summary_stats = {}
  header_text 'Sprint burndown'
  description_text <<-TEXT
    <div class="p">
      Burndowns for all sprints in this time period. The different colours are only to
      differentiate one sprint from another as they may overlap time periods.
    </div>
    #{describe_non_working_days}
  TEXT
end

Instance Attribute Details

#board_id ⇒ Object

Returns the value of attribute board_id.



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# File 'lib/jirametrics/sprint_burndown.rb', line 18

def board_id
  @board_id
end

#use_story_counts ⇒ Object (readonly)

Returns the value of attribute use_story_counts.



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# File 'lib/jirametrics/sprint_burndown.rb', line 17

def use_story_counts
  @use_story_counts
end

#use_story_points ⇒ Object (readonly)

Returns the value of attribute use_story_points.



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# File 'lib/jirametrics/sprint_burndown.rb', line 17

def use_story_points
  @use_story_points
end

Instance Method Details

#changes_for_one_issue(issue:, sprint:) ⇒ Object

select all the changes that are relevant for the sprint. If this issue never appears in this sprint then return [].



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# File 'lib/jirametrics/sprint_burndown.rb', line 123

def changes_for_one_issue issue:, sprint:
  story_points = 0.0
  ever_in_sprint = false
  currently_in_sprint = false
  change_data = []

  issue_completed_time = issue.board.cycletime.started_stopped_times(issue).last
  completed_has_been_tracked = false

  issue.changes.each do |change|
    action = nil
    value = nil

    if change.sprint?
      # We can get two sprint changes in a row that tell us the same thing so we have to verify
      # that something actually changed.
      in_change_item = sprint_in_change_item(sprint, change)
      if currently_in_sprint == false && in_change_item
        action = :enter_sprint
        ever_in_sprint = true
        value = story_points
      elsif currently_in_sprint && in_change_item == false
        action = :leave_sprint
        value = -story_points
      end
      currently_in_sprint = in_change_item
    elsif change.story_points? && (issue_completed_time.nil? || change.time < issue_completed_time)
      action = :story_points
      story_points = change.value.to_f
      value = story_points - change.old_value.to_f
    elsif completed_has_been_tracked == false && change.time == issue_completed_time
      completed_has_been_tracked = true
      action = :issue_stopped
      value = -story_points
    end

    next unless action

    change_data << SprintIssueChangeData.new(
      time: change.time, issue: issue, action: action, value: value, story_points: story_points
    )
  end

  return [] unless ever_in_sprint

  change_data
end

#data_set_by_story_counts(sprint:, change_data_for_sprint:) ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 272

def data_set_by_story_counts sprint:, change_data_for_sprint:
  summary_stats = SprintSummaryStats.new

  data_set = []
  issues_currently_in_sprint = []
  start_data_written = false

  change_data_for_sprint.each do |change_data|
    if start_data_written == false && change_data.time >= sprint.start_time
      data_set << {
        y: issues_currently_in_sprint.size,
        x: chart_format(sprint.start_time),
        title: "Sprint started with #{issues_currently_in_sprint.size} stories"
      }
      summary_stats.started = issues_currently_in_sprint.size
      start_data_written = true
    end

    break if sprint.completed_time && change_data.time > sprint.completed_time

    case change_data.action
    when :enter_sprint
      issues_currently_in_sprint << change_data.issue.key
    when :leave_sprint, :issue_stopped
      issues_currently_in_sprint.delete change_data.issue.key
    end

    next unless change_data.time >= sprint.start_time

    message = nil
    case change_data.action
    when :enter_sprint
      message = 'Added to sprint'
      summary_stats.added += 1
    when :issue_stopped
      message = 'Completed'
      summary_stats.completed += 1
    when :leave_sprint
      message = 'Removed from sprint'
      summary_stats.removed += 1
    end

    next unless message

    data_set << {
      y: issues_currently_in_sprint.size,
      x: chart_format(change_data.time),
      title: "#{change_data.issue.key} #{message}"
    }
  end

  unless start_data_written
    # There was nothing that triggered us to write the sprint started block so do it now.
    data_set << {
      y: issues_currently_in_sprint.size,
      x: chart_format(sprint.start_time),
      title: "Sprint started with #{issues_currently_in_sprint.size || 'no'} stories"
    }
  end

  if sprint.completed_time
    data_set << {
      y: issues_currently_in_sprint.size,
      x: chart_format(sprint.completed_time),
      title: "Sprint ended with #{issues_currently_in_sprint.size} stories unfinished"
    }
    summary_stats.remaining = issues_currently_in_sprint.size
  end

  unless sprint.completed_at?(time_range.end)
    # If the sprint is still active then we draw one final line to the end of the time range
    data_set << {
      y: issues_currently_in_sprint.size,
      x: chart_format(time_range.end),
      title: "Sprint still active. #{issues_currently_in_sprint.size} issues in progress."
    }
  end

  @summary_stats[sprint] = summary_stats
  data_set
end

#data_set_by_story_points(sprint:, change_data_for_sprint:) ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 175

def data_set_by_story_points sprint:, change_data_for_sprint:
  summary_stats = SprintSummaryStats.new
  summary_stats.completed = 0.0

  story_points = 0.0
  start_data_written = false
  data_set = []

  issues_currently_in_sprint = []

  change_data_for_sprint.each do |change_data|
    if start_data_written == false && change_data.time >= sprint.start_time
      data_set << {
        y: story_points,
        x: chart_format(sprint.start_time),
        title: "Sprint started with #{story_points} points"
      }
      summary_stats.started = story_points
      start_data_written = true
    end

    break if sprint.completed_time && change_data.time > sprint.completed_time

    case change_data.action
    when :enter_sprint
      issues_currently_in_sprint << change_data.issue.key
      story_points += change_data.story_points
    when :leave_sprint
      issues_currently_in_sprint.delete change_data.issue.key
      story_points -= change_data.story_points
    when :story_points
      story_points += change_data.value if issues_currently_in_sprint.include? change_data.issue.key
    end

    next unless change_data.time >= sprint.start_time

    message = nil
    case change_data.action
    when :story_points
      next unless issues_currently_in_sprint.include? change_data.issue.key

      old_story_points = change_data.story_points - change_data.value
      message = "Story points changed from #{old_story_points} points to #{change_data.story_points} points"
      summary_stats.points_values_changed = true
    when :enter_sprint
      message = "Added to sprint with #{change_data.story_points || 'no'} points"
      summary_stats.added += change_data.story_points
    when :issue_stopped
      story_points -= change_data.story_points
      message = "Completed with #{change_data.story_points || 'no'} points"
      issues_currently_in_sprint.delete change_data.issue.key
      summary_stats.completed += change_data.story_points
    when :leave_sprint
      message = "Removed from sprint with #{change_data.story_points || 'no'} points"
      summary_stats.removed += change_data.story_points
    else
      raise "Unexpected action: #{change_data.action}"
    end

    data_set << {
      y: story_points,
      x: chart_format(change_data.time),
      title: "#{change_data.issue.key} #{message}"
    }
  end

  unless start_data_written
    # There was nothing that triggered us to write the sprint started block so do it now.
    data_set << {
      y: story_points,
      x: chart_format(sprint.start_time),
      title: "Sprint started with #{story_points} points"
    }
    summary_stats.started = story_points
  end

  if sprint.completed_time
    data_set << {
      y: story_points,
      x: chart_format(sprint.completed_time),
      title: "Sprint ended with #{story_points} points unfinished"
    }
    summary_stats.remaining = story_points
  end

  unless sprint.completed_at?(time_range.end)
    data_set << {
      y: story_points,
      x: chart_format(time_range.end),
      title: "Sprint still active. #{story_points} points still in progress."
    }
  end

  @summary_stats[sprint] = summary_stats
  data_set
end

#options=(arg) ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 34

def options= arg
  case arg
  when :points_only
    @use_story_points = true
    @use_story_counts = false
  when :counts_only
    @use_story_points = false
    @use_story_counts = true
  when :points_and_counts
    @use_story_points = true
    @use_story_counts = true
  else
    raise "Unexpected option: #{arg}"
  end
end

#run ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 50

def run
  sprints = sprints_in_time_range all_boards[board_id]
  return nil if sprints.empty?

  change_data_by_sprint = {}
  sprints.each do |sprint|
    change_data = []
    issues.each do |issue|
      change_data += changes_for_one_issue(issue: issue, sprint: sprint)
    end
    change_data_by_sprint[sprint] = change_data.sort_by(&:time)
  end

  result = +''
  result << render_top_text(binding)

  possible_colours = (1..5).collect { |i| CssVariable["--sprint-burndown-sprint-color-#{i}"] }
  charts_to_generate = []
  charts_to_generate << [:data_set_by_story_points, 'Story Points'] if @use_story_points
  charts_to_generate << [:data_set_by_story_counts, 'Story Count'] if @use_story_counts
  charts_to_generate.each do |data_method, y_axis_title| # rubocop:disable Style/HashEachMethods
    @summary_stats.clear
    data_sets = []
    sprints.each_with_index do |sprint, index|
      color = possible_colours[index % possible_colours.size]
      label = sprint.name
      data = send(data_method, sprint: sprint, change_data_for_sprint: change_data_by_sprint[sprint])
      data_sets << {
        label: label,
        data: data,
        fill: false,
        showLine: true,
        borderColor: color,
        backgroundColor: color,
        stepped: true,
        pointStyle: %w[rect circle] # First dot is visually different from the rest
      }
    end

    legend = []
    case data_method
    when :data_set_by_story_counts
      legend << '<b>Started</b>: Number of issues already in the sprint, when the sprint was started.'
      legend << '<b>Completed</b>: Number of issues, completed during the sprint'
      legend << '<b>Added</b>: Number of issues added in the middle of the sprint'
      legend << '<b>Removed</b>: Number of issues removed while the sprint was in progress'
    when :data_set_by_story_points
      legend << '<b>Started</b>: Total count of story points when the sprint was started'
      legend << '<b>Completed</b>: Count of story points completed during the sprint'
      legend << '<b>Added</b>: Count of story points added in the middle of the sprint'
      legend << '<b>Removed</b>: Count of story points removed while the sprint was in progress'
    else
      raise "Unexpected method #{data_method}"
    end

    result << render(binding, __FILE__)
  end

  result
end

#sprint_in_change_item(sprint, change_item) ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 171

def sprint_in_change_item sprint, change_item
  change_item.raw['to'].split(/\s*,\s*/).any? { |id| id.to_i == sprint.id }
end

#sprints_in_time_range(board) ⇒ Object 



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# File 'lib/jirametrics/sprint_burndown.rb', line 111

def sprints_in_time_range board
  board.sprints.select do |sprint|
    sprint_end_time = sprint.completed_time || sprint.end_time
    sprint_start_time = sprint.start_time
    next false if sprint_start_time.nil?

    time_range.include?(sprint_start_time) || time_range.include?(sprint_end_time) ||
      (sprint_start_time < time_range.begin && sprint_end_time > time_range.end)
  end || []
end