Implement PhotoAttachable interface in Inventory, User, and WorkLog models; add photo upload API endpoint with file handling and attachment logic.

inventory/models/inventory.py

@@ -11,8 +11,9 @@ from sqlalchemy.orm import Mapped, mapped_column, relationship
 import datetime
 
 from . import db
+from .photo import PhotoAttachable
 
-class Inventory(db.Model):
+class Inventory(db.Model, PhotoAttachable):
     __tablename__ = 'inventory'
     __table_args__ = (
         Index('Inventory$Barcode', 'barcode'),

inventory/models/photo.py

@@ -10,6 +10,7 @@ from sqlalchemy import Integer, Unicode, DateTime, func
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from . import db
+from .photo_links import worklog_photos
 
 class Photo(db.Model):
     __tablename__ = 'photos'
@@ -21,7 +22,16 @@ class Photo(db.Model):
 
     inventory: Mapped[Optional['Inventory']] = relationship('Inventory', back_populates='photo')
     user: Mapped[Optional['User']] = relationship('User', back_populates='photo')
-    worklogs: Mapped[List['WorkLog']] = relationship('WorkLog', back_populates='photos')
+    worklogs: Mapped[List['WorkLog']] = relationship('WorkLog', secondary=worklog_photos, back_populates='photos')
+
+    def __init__(self, filename: str, timestamp: Optional[datetime.datetime] = None, caption: Optional[str] = None):
+        self.filename = filename
+        self.caption = caption or ""
+        self.timestamp = timestamp
 
     def __repr__(self):
         return f"<Photo(id={self.id}, filename={self.filename})>"
+
+class PhotoAttachable:
+    def attach_photo(self, photo: 'Photo') -> None:
+        raise NotImplementedError("This model doesn't know how to attach photos.")

inventory/models/users.py

@@ -9,8 +9,9 @@ from sqlalchemy import Boolean, ForeignKey, Identity, Integer, Unicode, text
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from . import db
+from .photo import PhotoAttachable
 
-class User(db.Model):
+class User(db.Model, PhotoAttachable):
     __tablename__ = 'users'
 
     id: Mapped[int] = mapped_column(Integer, Identity(start=1, increment=1), primary_key=True)

inventory/models/work_log.py

@@ -10,10 +10,11 @@ from sqlalchemy.orm import Mapped, mapped_column, relationship
 import datetime
 
 from . import db
+from .photo import PhotoAttachable
 from .photo_links import worklog_photos
 from .work_note import WorkNote
 
-class WorkLog(db.Model):
+class WorkLog(db.Model, PhotoAttachable):
     __tablename__ = 'work_log'
 
     id: Mapped[int] = mapped_column(Integer, Identity(start=1, increment=1), primary_key=True)