fix: stats on prev to start attack and flags

backend/stats.py

@@ -75,7 +75,7 @@ async def write_on_db():
     await set_db_stats(g.stats)
 
 def calc_tick(time:datetime):
-    return abs(math.floor((time - g.stats["start_time"]).total_seconds() / g.stats["tick_duration"])) + 1
+    return math.floor((time - g.stats["start_time"]).total_seconds() / g.stats["tick_duration"]) + 1
 
 def calc_tick_range(tick:int):
     return (g.stats["start_time"] + timedelta(seconds=(tick-1)*g.stats["tick_duration"]), g.stats["start_time"] + timedelta(seconds=tick*g.stats["tick_duration"]))
@@ -86,6 +86,8 @@ def add_stats(attack: AttackExecution, action: callable):
 
     #Adding missing ticks
     tick = calc_tick(attack.recieved_at)
+    if tick <= 0: return #skip data before start time
+
     if tick-len(g.stats["ticks"]) > 0:
         old_tick = len(g.stats["ticks"])
         for i in range(tick-len(g.stats["ticks"])):