timetracker/games/models.py

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from datetime import datetime, timedelta
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from typing import Any
from zoneinfo import ZoneInfo
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from common.time import format_duration
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from django.conf import settings
from django.db import models
from django.db.models import F, Manager, Sum
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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"])
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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)
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objects = SessionQuerySet.as_manager()
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def __str__(self):
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mark = ", manual" if self.duration_manual != None else ""
return f"{str(self.purchase)} {str(self.timestamp_start.date())} ({self.duration_formatted()}{mark})"
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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())
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def duration_formatted(self) -> str:
result = format_duration(self.duration_seconds(), "%H:%m")
return result
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@property
def duration_sum(self) -> str:
return Session.objects.all().total_duration()
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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)
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super(Session, self).save(*args, **kwargs)