Class: Net::NNTP::Listgroup

Inherits:
SelectionRequest show all
Defined in:
lib/net/nntp/request.rb

Overview

RFC 3977

LISTGROUP request.

Parent: Net::NNTP::SelectionRequest

Valid Responses: GroupSelected, GroupUnknown, NoGroupSelected

Instance Method Summary collapse

Methods inherited from SelectionRequest

#capability

Methods inherited from Request

#capability, #command, #dotstuff, #msgid_or_range, #range, #valid_response?

Constructor Details

#initialize(groupname = nil, range = {}) ⇒ Listgroup

  • groupname is the group that should be selected. If a name is given, the group will be selected; on success, the first article returned will be selected. If no name is given, the currently selected group will be used, and no range can be specified.
  • range a range of article numbers in the specified group, given as Hash with the keys :start and :end; if :end is not specified, the range is seen as 'open range', thus selecting all articles beginning with the number given as :start value to the last number available in the group.

Usage Example

# no groupname
request = Net::NNTP::Listgroup.new
  # request.command => 'LISTGROUP'
# only groupname
request = Net::NNTP::Listgroup.new('alt.test')
  # request.command => 'LISTGROUP alt.test'
# given only a start number
request = Net::NNTP::Listgroup.new('alt.test', :start => 1000) 
  # request.command => 'LISTGROUP alt.test 1000-'

# given a range
request = Net::NNTP::Listgroup.new('alt.test', :start => 1000, :end => 5000) 
  # request.command => 'LISTGROUP alt.test 1000- 5000'


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# File 'lib/net/nntp/request.rb', line 331

def initialize(groupname=nil, range={})
  param = nil
  if groupname then
    param = groupname
    unless range.empty?
      if range.has_key?(:start)
        if range.has_key?(:end)
          param = "#{groupname} #{range[:start]}-#{range[:end]}"
        else
          param = "#{groupname} #{range[:start]}-"
        end
      end
    end
  end
  super 'LISTGROUP', param
end