Add recurrence tasks use rrule field

backend/tasks/migrations/0011_recurrencetask.py

@@ -0,0 +1,39 @@
+# Generated by Django 4.2.6 on 2023-11-06 16:14
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('tasks', '0010_todo_alter_subtask_parent_task_delete_task'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='RecurrenceTask',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.TextField()),
+                ('notes', models.TextField(default='')),
+                ('importance', models.PositiveSmallIntegerField(choices=[(1, '1'), (2, '2'), (3, '3'), (4, '4'), (5, '5')], default=1)),
+                ('difficulty', models.PositiveSmallIntegerField(choices=[(1, 'Easy'), (2, 'Normal'), (3, 'Hard'), (4, 'Very Hard'), (5, 'Devil')], default=1)),
+                ('challenge', models.BooleanField(default=False)),
+                ('fromSystem', models.BooleanField(default=False)),
+                ('creation_date', models.DateTimeField(auto_now_add=True)),
+                ('last_update', models.DateTimeField(auto_now=True)),
+                ('google_calendar_id', models.CharField(blank=True, max_length=255, null=True)),
+                ('start_event', models.DateTimeField(null=True)),
+                ('end_event', models.DateTimeField(null=True)),
+                ('recurrence_rule', models.TextField()),
+                ('tags', models.ManyToManyField(blank=True, to='tasks.tag')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

backend/tasks/models.py

@@ -1,9 +1,5 @@
-from datetime import datetime
-
 from django.db import models
 from django.conf import settings
-from django.core import validators
-from django.utils import timezone
 
 class Tag(models.Model):
     """
@@ -14,7 +10,7 @@ class Tag(models.Model):
     name = models.CharField(max_length=255)
 
 
-class Todo(models.Model):
+class Task(models.Model):
     """
     Represents a Abstract of task, such as Habit, Daily, Todo, or Reward.
     
@@ -58,7 +54,7 @@ class Todo(models.Model):
         abstract = True
 
 
-class Todo(Todo):
+class Todo(Task):
     
     class EisenhowerMatrix(models.IntegerChoices):
         IMPORTANT_URGENT = 1, 'Important & Urgent'
@@ -71,6 +67,11 @@ class Todo(Todo):
     def __str__(self):
         return self.title
 
+class RecurrenceTask(Task):
+    recurrence_rule = models.TextField()
+
+    def __str__(self) -> str:
+        return f"{self.title} ({self.recurrence_rule})"
 
 class Subtask(models.Model):
     """