Fixes!

- punch card chart should work for both mysql and sqlite
- don't store Pokemon with negative time_till_hidden

db.py

@@ -149,13 +149,17 @@ def get_session_stats(session):
 
 
 def get_punch_card(session):
+    if get_engine_name(session) == 'sqlite':
+        bigint = 'BIGINT'
+    else:
+        bigint = 'UNSIGNED'
     query = session.execute('''
         SELECT
-            CAST((expire_timestamp / 300) AS BIGINT) ts_date,
+            CAST((expire_timestamp / 300) AS {bigint}) ts_date,
             COUNT(*) how_many
         FROM `sightings`
         GROUP BY ts_date ORDER BY ts_date
-    ''')
+    '''.format(bigint=bigint))
     results = query.fetchall()
     results_dict = {r[0]: r[1] for r in results}
     filled = []

worker.py

@@ -169,6 +169,11 @@ def main(self):
             if map_objects.get('status') == 1:
                 for map_cell in map_objects['map_cells']:
                     for pokemon in map_cell.get('wild_pokemons', []):
+                        # Care only about 15 min spawns
+                        # 30 and 45 min ones will be just put after
+                        # time_till_hidden is below 15 min
+                        if pokemon['time_till_hidden_ms'] < 0:
+                            continue
                         pokemons.append(self.normalize_pokemon(pokemon, now))
             for raw_pokemon in pokemons:
                 db.add_sighting(session, raw_pokemon)