close_enough.rb

  def close_enough(content)
    _close_enough = false
    # content always close enough when inside current users zip code or cherry picked tab
    if content.zip_code and self.zip_code and content.zip_code == self.zip_code or (content.is_a? Tab and \
      content.features.where(user_id: self.id).where(action: :cherry_pick).present?)
      _close_enough = true
    # close enough when within the users specified network size
    elsif content.latitude and self.latitude and self.network_size and \
      GeoDistance.distance(content.latitude, content.longitude, self.latitude,
      self.longitude).miles.number < self.network_size
      return true
    # if previous checks fail, allows
    # content access to branch out proportionately
    # as the local or global communities expand
    elsif content.zip_code.present?
      case content.class
      when Post
        # the more content in a given area, the less likely it is
        # for any particular item from that area to show
        near_content = Post.where(zip_code: content.zip_code).size
        # gets number of posts with the same zip code and is close
        # enough when a random value between 0 and the size of all
        # content is less than the number with the same zip code
        _close_enough = true if near_content < Random.rand(0..Post.all.size)
      when Tab
        near_content = Tab.where(zip_code: content.zip_code).size
        _close_enough = true if near_content < Random.rand(0..Tab.all.size)
      end
    else
      _close_enough = true
    end
    return _close_enough
  end