module Riffer::Rig::Terminal::Help

# File lib/riffer/rig/terminal/help.rb, line 37
def about(command)
  # A line break in a description would split its row in two.
  command.description.gsub(/[[:cntrl:]]+/, ' ').strip
end

# File lib/riffer/rig/terminal/help.rb, line 11
def call(commands)
  sorted = commands.sort_by(&:name)
  width = width(sorted)
  # The notice's wrap hangs a long description under its column only after
  # a gap of at least two spaces, and only while the names fill less than
  # half the line.
  rows = sorted.map { |command| "#{label(command, width)}  #{about(command)}" }
  [*rows, '', POINTER].join("\n")
end

# File lib/riffer/rig/terminal/help.rb, line 30
def label(command, width)
  padding = ' ' * (width - Riffer::Rig::Terminal::Columns.width(command.name))
  "#{Riffer::Rig::Terminal::Autocomplete::TRIGGER}#{command.name}#{padding}"
end

# File lib/riffer/rig/terminal/help.rb, line 23
def width(commands)
  commands.map { |command| Riffer::Rig::Terminal::Columns.width(command.name) }.max.to_i
end