- Improvements on document uploads (accept other files than html-files when entering a URL)

- Introduction of API-functionality (to be continued). Deduplication of document and url uploads between views and api.
- Improvements on document processing - introduction of processor classes to streamline document inputs
- Removed pure Youtube functionality, as Youtube retrieval of documents continuously changes. But added upload of srt, mp3, ogg and mp4

common/models/document.py

@@ -12,7 +12,7 @@ class Document(db.Model):
 
     # Versioning Information
     created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
-    created_by = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
+    created_by = db.Column(db.Integer, db.ForeignKey(User.id), nullable=True)
     updated_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now(), onupdate=db.func.now())
     updated_by = db.Column(db.Integer, db.ForeignKey(User.id))