Class: TasksExcelPresenter

Inherits:
Object
  • Object
show all
Includes:
Xlsx::Elements
Defined in:
app/presenters/tasks_excel_presenter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tasks) ⇒ TasksExcelPresenter

Returns a new instance of TasksExcelPresenter.



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# File 'app/presenters/tasks_excel_presenter.rb', line 6

def initialize(tasks)
  @tasks = tasks
end

Instance Attribute Details

#tasks ⇒ Object (readonly)

Returns the value of attribute tasks.



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# File 'app/presenters/tasks_excel_presenter.rb', line 4

def tasks
  @tasks
end

Instance Method Details

#to_s ⇒ Object 



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# File 'app/presenters/tasks_excel_presenter.rb', line 10

def to_s
  package = Xlsx::Package.new
  worksheet = package.workbook.worksheets[0]

  tasks = Houston.benchmark "[#{self.class.name.underscore}] Load objects" do
    self.tasks.includes(:project, :ticket).load
  end if self.tasks.is_a?(ActiveRecord::Relation)

  title = {
    font: Font.new("Calibri", 16) }
  heading = {
    alignment: Alignment.new("left", "center") }
  general = {
    alignment: Alignment.new("left", "center") }
  timestamp = {
    format: NumberFormat::DATETIME,
    alignment: Alignment.new("right", "center") }
  integer = {
    format: NumberFormat::INTEGER,
    alignment: Alignment.new("right", "center") }
  number = {
    format: NumberFormat::DECIMAL,
    alignment: Alignment.new("right", "center") }

  worksheet.add_row(
    number: 2,
    cells: [
      { column: 2, value: "Tasks", style: title, height: 24 }])

  headers = %w{Project Description Completed Estimate}
  worksheet.add_row(
    number: 3,
    cells: [
      { column: 2, value: "Project", style: heading },
      { column: 3, value: "Description", style: heading },
      { column: 4, value: "Completed", style: heading },
      { column: 5, value: "Estimate", style: heading },
      { column: 6, value: "Hours", style: heading },
      { column: 7, value: "Names", style: heading },
    ])

  tasks.each_with_index do |task, i|
    commits = commits_by_task_id.fetch(task.id, [])
    worksheet.add_row(
      number: i + 4,
      cells: [
        { column: 2, value: task.project.try(:name), style: general },
        { column: 3, value: task.description, style: general },
        { column: 4, value: task.completed_at, style: timestamp },
        { column: 5, value: task.effort, style: number },
        { column: 6, value: commit_time(commits), style: number },
        { column: 7, value: committers(commits).join("; "), style: general },
      ])
  end

  worksheet.column_widths({
    1 => 3.8,
    2 => 18,
    3 => 72,
    4 => 15,
    5 => 10,
    6 => 10,
    7 => 40,
  })

  worksheet.add_table 1, "Tasks", "B3:G#{tasks.length + 3}", [
    TableColumn.new("Project"),
    TableColumn.new("Description"),
    TableColumn.new("Completed"),
    TableColumn.new("Estimate"),
    TableColumn.new("Hours"),
    TableColumn.new("Names")
  ]

  Houston.benchmark "[#{self.class.name.underscore}] Prepare file" do
    package.to_stream.string
  end
end