Add subscription functionality

new-registration-app/models.py

@@ -1,5 +1,6 @@
 import typing
 from datetime import datetime
+from xmlrpc.client import DateTime
 
 from sqlmodel import Field, Relationship, SQLModel, String
 
@@ -79,3 +80,51 @@ class Registration(SQLModel, table=True):
     comment: str | None
 
     household: Household = Relationship()
+
+
+class Subscription(SQLModel, table=True):
+    household_id: int | None = Field(
+        default=None, foreign_key="household.id", primary_key=True
+    )
+    num_adult_meals: int
+    num_children_meals: int
+    num_small_children_meals: int
+    comment: str | None
+
+    last_modified: datetime = Field(default_factory=datetime.now, nullable=False)
+
+    monday: bool = True
+    tuesday: bool = True
+    wednesday: bool = True
+    thursday: bool = True
+    friday: bool = True
+    saturday: bool = True
+    sunday: bool = True
+
+    household: Household = Relationship()
+
+    def day_string_de(self) -> str:
+        """
+        Generates a string representation of selected days in German short form.
+        """
+        result = []
+
+        if self.monday:
+            result.append("Mo")
+        if self.tuesday:
+            result.append("Di")
+        if self.wednesday:
+            result.append("Mi")
+        if self.thursday:
+            result.append("Do")
+        if self.friday:
+            result.append("Fr")
+        if self.saturday:
+            result.append("Sa")
+        if self.sunday:
+            result.append("So")
+
+        if len(result) < 7:
+            return ", ".join(result)
+        else:
+            return "Alle"