Cleaning up the code - renaming routes to trains as it makes more sense (each isntance is an instance of an individual train)

Reworking the MTA to be ready for use by people other than me.

mta_manager/train.py

@@ -0,0 +1,43 @@
+from .stop import get_stop_from_dict
+
+
+def get_train_from_dict(obj):
+    if "trip_update" in obj and "stop_time_update" in obj["trip_update"]:
+        # data we need is here create object
+        id = obj["id"]
+        route = obj["trip_update"]["trip"]["route_id"]
+        all_stops = [get_stop_from_dict(x) for x in obj["trip_update"]["stop_time_update"]]
+        valid_stops = [valid_stop for valid_stop in all_stops if valid_stop is not None]
+        return Train(id, route, valid_stops)
+    else:
+        return None
+
+
+class Train(object):
+    def __init__(self, id, route, stops):
+        self.id = id
+        self.route = route
+        self.stops = stops
+
+    def get_arrival_at(self, stop_id):
+        """
+        returns the routes stop time at a given stop ID in minutes
+        if not found, returns None
+        :param stop_id: stop ID of arrival station
+        :return: arrival time in minutes
+        """
+        for stop in self.stops:
+            if stop.id == stop_id:
+                return stop.arrival_minutes()
+        return None
+
+    def arriving_at_station_in_time(self, station_id, max_time):
+        for stop in self.stops:
+            minutes_to_arrival = stop.arrival_minutes()
+            if stop.id == station_id:
+                if minutes_to_arrival > 0 and minutes_to_arrival < max_time:
+                    return True
+
+    def __str__(self):
+        formatted_stops  = '\n'.join([str(stop) for stop in self.stops])
+        return f"train_id:{self.id} | line_name:{self.route}| stops:\n {formatted_stops}"