class Byebug::ConditionCommand

def description
  %{
    cond[ition] nnn[ expr]
    Specify breakpoint number nnn to break only if expr is true. nnn is an
    integer and expr is an expression to be evaluated whenever breakpoint
    nnn is reached. If no expression is specified, the condition is
    removed.
  }
end

def execute
  if not @match[1]
    errmsg "\"condition\" must be followed by breakpoint number and expression\n"
  else
    breakpoints = Byebug.breakpoints.sort_by{|b| b.id }
    largest = breakpoints.inject(0) do |tally, b|
      tally = b.id if b.id > tally
    end
    if 0 == largest
      print "No breakpoints have been set.\n"
      return
    end
    pos = get_int(@match[1], "Condition", 1, largest)
    return unless pos
    breakpoints.each do |b|
      if b.id == pos
        b.expr = @match[2].empty? ? nil : @match[2]
        break
      end
    end
  end
end

def names
  %w(condition)
end

def regexp
  /^\s* cond(?:ition)? (?:\s+(\d+)\s*(.*))?$/ix
end