Class: MyBusTracker::Service

Inherits:
Object
  • Object
show all
Defined in:
lib/mybustracker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client, appkey, mbt, service, number = '') ⇒ Service

Returns a new instance of Service.



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# File 'lib/mybustracker.rb', line 26

def initialize(client, appkey, mbt,  service, number='')
  
  if number.empty? then
    raise MyBusTrackerException::Service, 'provide a bus service number'
  end
  
  @client, @appkey, @mbt = client, appkey, mbt
  
  @number, @name, @ref, relative_dests, operator  = \
      i(mnemo name ref dests operator).map {|field| service[field]}      
  
  Thread.new{ fetch_bus_stops() }
  
end

Instance Attribute Details

#bus_stops ⇒ Object (readonly)

Returns the value of attribute bus_stops.



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# File 'lib/mybustracker.rb', line 24

def bus_stops
  @bus_stops
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/mybustracker.rb', line 24

def name
  @name
end

#number ⇒ Object (readonly)

Returns the value of attribute number.



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# File 'lib/mybustracker.rb', line 24

def number
  @number
end

#operator ⇒ Object (readonly)

Returns the value of attribute operator.



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# File 'lib/mybustracker.rb', line 24

def operator
  @operator
end

#ref ⇒ Object (readonly)

Returns the value of attribute ref.



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# File 'lib/mybustracker.rb', line 24

def ref
  @ref
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/mybustracker.rb', line 41

def inspect()
  "<#<MyBusTracker::Service:%s @number=\"%s\">" % [self.object_id, @number]
end

#query(times: 'next hour', from: nil, to: nil) ⇒ Object

accepts a bus service number and returns the relative bus times



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# File 'lib/mybustracker.rb', line 47

def query(times: 'next hour', from: nil, to: nil)
  
  #from ||=
  
  start_bus_stop1, start_bus_stop2 = find_bus_stop(from)
  end_bus_stop1, end_bus_stop2 = find_bus_stop(to)

  # get the bus times
  
  bus_times = get_bus_times(start_bus_stop1)            
  
  journey_times = get_stop_journeys(start_bus_stop1, bus_times, index: 0)
  return unless journey_times

  # select the bus stop end
  
  end_stop = journey_times.find do |x| 
    x[:stop_id] == end_bus_stop1[:stop_id] or 
        x[:stop_id] == end_bus_stop2[:stop_id]
  end
  
        
  if end_stop then
    start_bus_stop = start_bus_stop1
  else
    start_bus_stop = start_bus_stop2
    bus_times = get_bus_times(start_bus_stop2)
    
    unless end_stop
      journey_times = get_stop_journeys(start_bus_stop2, bus_times)
    end
    
    return unless journey_times
    # select the bus stop end

    end_stop = journey_times.find do |x|
      (x[:stop_id] == end_bus_stop1[:stop_id]) or 
          (x[:stop_id] == end_bus_stop2[:stop_id])
    end
    
  end
  
  stop_id = end_stop[:stop_id]      
  
  # get the other journeys
  # still todo
  journeys = [[journey_times[0][:time], end_stop[:time]]]
  journey = get_stop_journeys(start_bus_stop, bus_times, index: 1)      
  
  if journey then
    end_stop = journey.find {|x| x[:stop_id] == stop_id }

    journeys << [journey[0][:time], end_stop[:time]] 
  end
  
  # get the journeys for the given period
  #secs = journeys[1][0][:time] - journey_times[0][:time]
  
  from_times = journeys.map {|x| Time.strptime(x.first, "%H:%M").strftime("%-I:%M%P")}
  to_times = journeys.map {|x| Time.strptime(x.last, "%H:%M").strftime("%-I:%M%P")}

  tstart = Time.strptime(journeys[0][0],"%H:%M")
  tend = Time.strptime(journeys[0][-1],"%H:%M")
  travel_time = '~' + Subunit.new(units={minutes:60, hours:60}, \
                             seconds: tend - tstart).to_s(omit: [:seconds])
  
  index = journey_times.index journey_times.find {|x| x[:stop_id] == stop_id}
  stops = journey_times[0..index].map {|x| x[:stop_name] }
  
  {
    from: {bus_stop: start_bus_stop[:name], bus_stop_id: 
           start_bus_stop[:stop_id], times: from_times},
    to: {bus_stop: end_stop[:stop_name], bus_stop_id: end_stop[:stop_id], 
         times: to_times},
    stops: stops ,
    start: tstart.strftime("%-I:%M%P"), 
    end: tend.strftime("%-I:%M%P"),
    travel_time: travel_time
  }
  
end