Search for (with exclusions)

search_for.rb

  def search_for(resources, criteria={}, exclusions=nil)
    if(criteria[:from])
      date = DateTime.parse(criteria.delete(:from))
      criteria[:time_utc.gte] = date
    end

    if criteria[:to]
      date = DateTime.parse(criteria.delete(:to))
      criteria[:time_utc.lte] = date+1 # lame but we wanted to make the demo
    end

    if exclusions
      exclusions = exclusions.inject({}) { |e, x| e[x] = 0 }
      resources.where(locomotive_id: self.locomotive_id, exclusions)
    else 
      resources.where(locomotive_id: self.locomotive_id)
    end.tap do |query|
      query.merge!(resources.where(criteria)) unless criteria.empty?
    end.order_by(:time_utc.asc)
  end