Class: Lita::Handlers::Totems

Inherits:
Handler
  • Object
show all
Defined in:
lib/lita/handlers/totems.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.route_regex(action_capture_group) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 9

def self.route_regex(action_capture_group)
  %r{
  ^totems?\s+
  (#{action_capture_group})\s+
  (?<totem>\w+)\s*
  (?<message>.*)?
  }x
end

Instance Method Details

#add(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 93

def add(response)
  totem = response.match_data[:totem]
  unless redis.exists("totem/#{totem}")
    response.reply %{Error: there is no totem "#{totem}".}
    return
  end

  user_id = response.user.id

  if queued_by_user(user_id).include?(totem)
    response.reply %{Error: you are already in the queue for "#{totem}".}
    return
  end

  if redis.smembers("user/#{user_id}/totems").include?(totem)
    response.reply %{Error: you already have the totem "#{totem}".}
    return
  end

  message = response.match_data[:message]

  token_acquired = false
  queue_size     = nil
  Redis::Semaphore.new("totem/#{totem}", redis: redis).lock do
    redis.hset("totem/#{totem}/message", user_id, message) if message && message != ""
    if redis.llen("totem/#{totem}/list") == 0 && redis.get("totem/#{totem}/owning_user_id").nil?
      # take it:
      token_acquired = true
      redis.set("totem/#{totem}/owning_user_id", user_id)
      redis.hset("totem/#{totem}/waiting_since", user_id, Time.now.to_i)
    else
      # queue:
      queue_size = redis.rpush("totem/#{totem}/list", user_id)
      redis.hset("totem/#{totem}/waiting_since", user_id, Time.now.to_i)
    end
  end

  if token_acquired
    # TODO don't readd to totems you are already waiting for!
    redis.sadd("user/#{user_id}/totems", totem)
    response.reply(%{#{response.user.name}, you now have totem "#{totem}".})
  else
    response.reply(%{#{response.user.name}, you are \##{queue_size} in line for totem "#{totem}".})
  end

end

#create(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 80

def create(response)
  totem = response.match_data[:totem]

  if redis.exists("totem/#{totem}")
    response.reply %{Error: totem "#{totem}" already exists.}
  else
    redis.set("totem/#{totem}", 1)
    redis.sadd("totems", totem)
    response.reply %{Created totem "#{totem}".}
  end

end

#destroy(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 65

def destroy(response)
  totem = response.match_data[:totem]
  if redis.exists("totem/#{totem}")
    redis.del("totem/#{totem}")
    redis.del("totem/#{totem}/list")
    redis.srem("totems", totem)
    owning_user_id = redis.get("totem/#{totem}/owning_user_id")
    redis.srem("user/#{owning_user_id}/totems", totem) if owning_user_id
    redis.del("totem/#{totem}/waiting_since")
    response.reply(%{Destroyed totem "#{totem}".})
  else
    response.reply(%{Error: totem "#{totem}" doesn't exist.})
  end
end

#info(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 197

def info(response)
  totem_param = response.match_data[:totem]
  resp        = unless totem_param.nil? || totem_param.empty?
                  list_users_print(totem_param)
                else
                  users_cache = new_users_cache
                  r           = "Totems:\n"
                  redis.smembers("totems").each do |totem|
                    r += "- #{totem}\n"
                    r += list_users_print(totem, '  ', users_cache)
                  end
                  r
                end
  response.reply resp
end

#kick(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 168

def kick(response)
  totem = response.match_data[:totem]
  unless redis.exists("totem/#{totem}")
    response.reply %{Error: there is no totem "#{totem}".}
    return
  end

  past_owning_user_id = redis.get("totem/#{totem}/owning_user_id")
  if past_owning_user_id.nil?
    response.reply %{Error: Nobody owns totem "#{totem}" so you can't kick someone from it.}
    return
  end

  redis.srem("user/#{past_owning_user_id}/totems", totem)
  redis.hdel("totem/#{totem}/waiting_since", past_owning_user_id)
  redis.hdel("totem/#{totem}/message", past_owning_user_id)
  robot.send_messages(Lita::Source.new(user: Lita::User.find_by_id(past_owning_user_id)), %{You have been kicked from totem "#{totem}".})
  next_user_id = redis.lpop("totem/#{totem}/list")
  if next_user_id
    redis.set("totem/#{totem}/owning_user_id", next_user_id)
    redis.sadd("user/#{next_user_id}/totems", totem)
    redis.hset("totem/#{totem}/waiting_since", next_user_id, Time.now.to_i)
    robot.send_messages(Lita::Source.new(user: Lita::User.find_by_id(next_user_id)), %{You are now in possession of totem "#{totem}".})
  else
    redis.del("totem/#{totem}/owning_user_id")
  end

end

#yield(response) ⇒ Object 



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# File 'lib/lita/handlers/totems.rb', line 140

def yield(response)
  user_id               = response.user.id
  totems_owned_by_user  = redis.smembers("user/#{user_id}/totems")
  totems_queued_by_user = queued_by_user(user_id)
  if totems_owned_by_user.empty? && totems_queued_by_user.empty?
    response.reply "Error: You do not have any totems to yield."
  elsif totems_owned_by_user.size == 1 && !response.match_data[:totem] && totems_queued_by_user.empty?
    yield_totem(totems_owned_by_user[0], user_id, response)
  else
    totem_specified = response.match_data[:totem]
    # if they don't specify and are only queued for a single totem, yield that one
    totem_specified = totems_queued_by_user.first if !totem_specified && totems_queued_by_user.size == 1 && totems_owned_by_user.empty?
    if totem_specified
      if totems_owned_by_user.include?(totem_specified)
        yield_totem(totem_specified, user_id, response)
      elsif totems_queued_by_user.include?(totem_specified)
        redis.lrem("totem/#{totem_specified}/list", 0, user_id)
        redis.hdel("totem/#{totem_specified}/waiting_since", user_id)
        response.reply("You are no longer in line for the \"#{totem_specified}\" totem.")
      else
        response.reply %{Error: You don't own and aren't waiting for the "#{totem_specified}" totem.}
      end
    else
      response.reply "You must specify a totem to yield.  Totems you own: #{totems_owned_by_user.sort}.  Totems you are in line for: #{totems_queued_by_user.sort}."
    end
  end
end