from django.db import models from datetime import datetime, timedelta from django.conf import settings from zoneinfo import ZoneInfo from common.util.time import format_duration from django.db.models import Sum, F from django.db.models import Manager from typing import Any class Game(models.Model): name = models.CharField(max_length=255) wikidata = models.CharField(max_length=50) def __str__(self): return self.name class Purchase(models.Model): game = models.ForeignKey("Game", on_delete=models.CASCADE) platform = models.ForeignKey("Platform", on_delete=models.CASCADE) date_purchased = models.DateField() date_refunded = models.DateField(blank=True, null=True) def __str__(self): return f"{self.game} ({self.platform})" class Platform(models.Model): name = models.CharField(max_length=255) group = models.CharField(max_length=255) def __str__(self): return self.name class SessionQuerySet(models.QuerySet): def total_duration(self): result = self.aggregate( duration=Sum(F("duration_calculated") + F("duration_manual")) ) return format_duration(result["duration"]) class Session(models.Model): purchase = models.ForeignKey("Purchase", on_delete=models.CASCADE) timestamp_start = models.DateTimeField() timestamp_end = models.DateTimeField(blank=True, null=True) duration_manual = models.DurationField(blank=True, null=True, default=timedelta(0)) duration_calculated = models.DurationField(blank=True, null=True) note = models.TextField(blank=True, null=True) objects = SessionQuerySet.as_manager() def __str__(self): mark = ", manual" if self.duration_manual != None else "" return f"{str(self.purchase)} {str(self.timestamp_start.date())} ({self.duration_formatted()}{mark})" def finish_now(self): self.timestamp_end = datetime.now(ZoneInfo(settings.TIME_ZONE)) def start_now(): self.timestamp_start = datetime.now(ZoneInfo(settings.TIME_ZONE)) def duration_seconds(self) -> timedelta: manual = timedelta(0) calculated = timedelta(0) if not self.duration_manual in (None, 0, timedelta(0)): manual = self.duration_manual if self.timestamp_end != None and self.timestamp_start != None: calculated = self.timestamp_end - self.timestamp_start return timedelta(seconds=(manual + calculated).total_seconds()) def duration_formatted(self) -> str: result = format_duration(self.duration_seconds(), "%H:%m") return result @property def duration_sum(self) -> str: return Session.objects.all().total_duration() @property def last(self) -> Manager[Any]: return Session.objects.all().order_by("timestamp_start")[:-1] def save(self, *args, **kwargs): if self.timestamp_start != None and self.timestamp_end != None: self.duration_calculated = self.timestamp_end - self.timestamp_start else: self.duration_calculated = timedelta(0) super(Session, self).save(*args, **kwargs)