tweet_cms.rb

HASH_COMMAND_MATCHER = /(#d(?:\s|$|([0-9]+))(?:\s|$))/

# hash commands for twitter:
# `#d`      :     delete the last twitter post in the wire
# `#d35235` :     delete tweet with id 35235 from the wire
def process_hash_commands
  cmds = []
  @payload.each do |tweet|
    if Update.find_by_native_item_id(tweet.id).nil?
      tweet.text =~ HASH_COMMAND_MATCHER
      if $1
        cmds << $1.strip 
        
        # keep the command tweet around and 
        # hidden, so we don't process it again
        Update.create({:native_item_id => tweet.id, :hide => true})
      end
    end
  end
  cmds.each do |cmd|
    if cmd == "#d"
      u = Update.find(:first, :conditions => {:via => "twitter", :hide => false}, :order => "item_create_time DESC")
    else #d with tweet_id
      tweet_id = cmd.sub(/#d/,'').to_i
      u = Update.find(:first, :conditions => {:native_item_id => tweet_id})
    end
    if u
      u.hide = true
      u.save
    end
  end
end

it "should match correct hash commands" do
  re = MultiWire::Consumer::HASH_COMMAND_MATCHER

  "delete the last tweet please #d" =~ re
  $1.strip.should eql("#d") if $1

  "delete the #d tweet please " =~ re
  $1.strip.should eql("#d") if $1
  
  "delete some tweet #d26015886424 thanks" =~ re
  $1.strip.should eql("#d26015886424") if $1
  
  "don't delete anything, this is just a plain old tweet" =~ re
  $1.should be_nil
  
  "#destroyer of worlds" =~ re
  $1.should be_nil

  "check out this sweet #d2d software" =~ re
  $1.should be_nil
end

it "should delete stuff from the wire according to twitter hash commands" do
  #most recent tweet
  Update.find(:first, :conditions => {:native_item_id => 26550410216}).hide.should_not be_true
  
  #random tweet
  Update.find(:first, :conditions => {:native_item_id => 26015886424}).hide.should_not be_true

  fake_command_tweets = [
    {:text => "delete the last tweet please #d"}, 
    {:text => "delete some tweet #d26015886424 thanks"},
    {:text => "don't delete anything, this is just a plain old tweet"}
  ].collect {|q| Hashie::Mash.new(q) }
  
  m = MultiWire::Consumer.new
  m.instance_variable_set(:@payload, fake_command_tweets)
  m.process_hash_commands()
  
  #most recent tweet
  Update.find(:first, :conditions => {:native_item_id => 26550410216}).hide.should be_true
  
  #random tweet killed by id
  id_based_twitter_entry = Update.find(:first, :conditions => {:native_item_id => 26015886424}).hide.should be_true
end