fixes Polyline class to handle a case in which google is returning on…

…ly one point (#1674)

* Fixes:

https://github.com/th3w4y/PokemonGo-Bot/issues/27

* Fixes:
PolylineStepWalker walks for only one seconds #28
https://github.com/th3w4y/PokemonGo-Bot/issues/28

by adding a while destination nat reached loop

* fixes typo

pokemongo_bot/walkers/polyline_generator.py

@@ -62,7 +62,8 @@ def walk_steps(self):
             walk_steps = zip(chain([self.points[0]], self.points),
                              chain(self.points, [self.points[-1]]))
             walk_steps = filter(None, [(o, d) if o != d else None for o, d in walk_steps])
-            return walk_steps
+            # consume the filter as list https://github.com/th3w4y/PokemonGo-Bot/issues/27
+            return list(walk_steps)
         else:
             return []
 
@@ -73,19 +74,24 @@ def get_pos(self):
         else:
             time_passed = self._last_paused_timestamp
         time_passed_distance = self.speed * abs(time_passed - self._timestamp - self._paused_total)
-        steps_dict = {}
-        for step in self.walk_steps():
-            walked_distance += haversine.haversine(*step)*1000
-            steps_dict[walked_distance] = step
-        for walked_end_step in sorted(steps_dict.keys()):
+        # check if there are any steps to take https://github.com/th3w4y/PokemonGo-Bot/issues/27
+        if self.walk_steps():
+            steps_dict = {}
+            for step in self.walk_steps():
+                walked_distance += haversine.haversine(*step)*1000
+                steps_dict[walked_distance] = step
+            for walked_end_step in sorted(steps_dict.keys()):
+                if walked_end_step >= time_passed_distance:
+                    break
+            step_distance = haversine.haversine(*steps_dict[walked_end_step])*1000
             if walked_end_step >= time_passed_distance:
-                break
-        step_distance = haversine.haversine(*steps_dict[walked_end_step])*1000
-        if walked_end_step >= time_passed_distance:
-            percentage_walked = (time_passed_distance - (walked_end_step - step_distance)) / step_distance
+                percentage_walked = (time_passed_distance - (walked_end_step - step_distance)) / step_distance
+            else:
+                percentage_walked = 1.0
+            return self.calculate_coord(percentage_walked, *steps_dict[walked_end_step])
         else:
-            percentage_walked = 1.0
-        return self.calculate_coord(percentage_walked, *steps_dict[walked_end_step])
+            # otherwise return the destination https://github.com/th3w4y/PokemonGo-Bot/issues/27
+            return [self.points[-1]]
 
     def calculate_coord(self, percentage, o, d):
         # If this is the destination then returning as such

pokemongo_bot/walkers/polyline_walker.py

@@ -13,11 +13,12 @@ def __init__(self, bot, speed, destLat, destLng):
         logger.log('[#] {}'.format(self.polyline_walker.URL))
 
     def step(self):
-        self.polyline_walker.unpause()
-        sleep(1)
-        self.polyline_walker.pause()
-        cLat, cLng = self.polyline_walker.get_pos()[0]
-        self.api.set_position(round(cLat, 5), round(cLng, 5), 0)
-        self.bot.heartbeat()
-        if self.destLat == cLat and self.destLng == cLng:
-            return True
+        cLat, cLng = self.api._position_lat, self.api._position_lng
+        while (cLat, cLng) != self.polyline_walker.get_pos()[0]:
+            self.polyline_walker.unpause()
+            sleep(1)
+            self.polyline_walker.pause()
+            cLat, cLng = self.polyline_walker.get_pos()[0]
+            self.api.set_position(round(cLat, 5), round(cLng, 5), 0)
+            self.bot.heartbeat()
+        return True