query the flock-server

flockompass.kv

@@ -108,6 +108,18 @@
             id: to_dest
             source: 'assets/needle_to_dest.png'
             pos_hint: {"center_x": 0.5, "center_y": 0.7}
+            canvas.before:
+                PushMatrix
+                Rotate:
+                    angle: app.dbearing
+                    axis: 0, 0, 1
+                    origin: self.center
+            canvas.after:
+                PopMatrix
+        Image:
+            id: to_flock
+            source: 'assets/needle_to_flock.png'
+            pos_hint: {"center_x": 0.5, "center_y": 0.7}
             canvas.before:
                 PushMatrix
                 Rotate:

main.py

@@ -12,12 +12,16 @@ from kivy.uix.image import Image
 from kivy.vector import Vector
 from kivy.animation import Animation
 from math import atan2, sin, cos, degrees, floor
+import requests
 
 from geopy.distance import geodesic
 
 from os import path
 import pickle
 
+FLOCK_SERVER="http://192.168.0.8:5000"
+
+
 class IconButton(ButtonBehavior, Image):
     pass
 
@@ -57,6 +61,7 @@ class FlockompassApp(App):
     session_data = DictProperty()
     needle_angle = NumericProperty(0)
     fbearing = NumericProperty(0)
+    dbearing = NumericProperty(0)    
 
     dest_distance = StringProperty("")
     dashboard_dest = StringProperty("")
@@ -185,6 +190,11 @@ class FlockompassApp(App):
             self.dest_distance = "Destino: %s\nVel: %0.1f km/h" % (dest_distance,
                                                                    self.gps_data['speed'] * 1.609344)
 
+            self.session_data.update({'speed': self.gps_data['speed'] * 1.609344,
+                                      'bearing': self.gps_data['bearing'],
+                                      'lat': self.gps_data['lat'],
+                                      'lon': self.gps_data['lon']})
+
             
     def center_map_on_gps(self):
         self.ms.ids.mapview.center_on(self.gps_data['lat'],
@@ -227,14 +237,12 @@ class FlockompassApp(App):
         lat2 = self.session_data['dest_lat']
         lon2 = self.session_data['dest_lon']
 
-        fbearing = atan2(sin(lon2 - lon1) * cos(lat2),
+        dbearing = atan2(sin(lon2 - lon1) * cos(lat2),
                          cos(lat1) * sin(lat2)
                          - sin(lat1) * cos(lat2) * cos(lon2-lon1))
-        fbearing = self.needle_angle - degrees(fbearing)
+        dbearing = self.needle_angle - degrees(dbearing)
 
-        #fbearing = (fbearing + 360) % 360
-
-        self.cs._anim &= Animation(fbearing=fbearing,
+        self.cs._anim &= Animation(dbearing=dbearing,
                                   d=0.1,
                                   t='out_quad')
 
@@ -258,6 +266,37 @@ class FlockompassApp(App):
         self.compass_enable()
         self.gps_start(1000, 0)
 
+    def flock_server_register(self):
+
+        register_url = "{server}/register/?dest_lon={dest_lon}&dest_lat={dest_lat}"
+        r = requests.get(register_url.format(server=FLOCK_SERVER,
+                                             dest_lon=self.session_data['dest_lon'],
+                                             dest_lat=self.session_data['dest_lat']))
+        out = r.json()
+        
+        self.session_data['bike_id'] = out['bike_id']
+
+
+    def flock_server_update(self):    
+        update_url = "{server}/update/{bike_id}/?lat={lat}&lon={lon}&speed={speed}&bearing={bearing}"
+        req = requests.get(update_url.format(server=FLOCK_SERVER,
+                                             bike_id=self.session_data['bike_id'],
+                                             speed=self.session_data['speed'],
+                                             bearing=self.session_data['bearing'],
+                                             lat=self.session_data['lat'], 
+                                             lon=self.session_data['lon']))
+        resp = req.json()
+        self.session_data.update(resp)
+
+
+        
+    def flock(self, dt):
+        if 'bike_id' in self.session_data:
+            self.flock_server_update()
+        else:
+            self.flock_server_register()
+
+        
     def build(self):
 
         # start GPS
@@ -296,7 +335,7 @@ class FlockompassApp(App):
         self.cs._anim1 = None
         screen_manager.add_widget(self.cs)
 
-        #Clock.schedule_interval(self.dump, 2.0)
+        Clock.schedule_interval(self.flock, 20.0)
 
         return screen_manager