Added a whole lot of views.

Finished quiz API views
Finished question generator and answer eval

ref-test/app/models/dataset.py

@@ -0,0 +1,82 @@
+from ..data import data
+from ..modules import db
+from ..tools.logs import write
+
+from flask import flash, jsonify
+from flask_login import current_user
+from werkzeug.utils import secure_filename
+
+from datetime import datetime
+from json import dump, loads
+from os import path, remove
+from uuid import uuid4
+
+class Dataset(db.Model):
+
+    id = db.Column(db.String(36), primary_key=True)
+    tests = db.relationship('Test', backref='dataset')
+    creator_id = db.Column(db.String(36), db.ForeignKey('user.id'))
+    date = db.Column(db.DateTime, nullable=False)
+    default = db.Column(db.Boolean, default=False, nullable=True)
+
+    def __repr__(self):
+        return f'<Dataset {self.id}> was added.'
+
+    @property
+    def generate_id(self): raise AttributeError('generate_id is not a readable attribute.')
+
+    generate_id.setter
+    def generate_id(self): self.id = uuid4.hex()
+
+    def make_default(self):
+        for dataset in Dataset.query.all():
+            dataset.default = False
+        self.default = True
+        db.session.commit()
+        write('system.log', f'Dataset {self.id} set as default by {current_user.get_username()}.')
+        flash(message='Dataset set as default.', category='success')
+        return True, f'Dataset set as default.'
+    
+    def delete(self):
+        if self.default:
+            message = 'Cannot delete the default dataset.'
+            flash(message, 'error')
+            return False, jsonify({'error': message})
+        if Dataset.query.all().count() == 1:
+            message = 'Cannot delete the only dataset.'
+            flash(message, 'error')
+            return False, jsonify({'error': message})
+        write('system.log', f'Dataset {self.id} deleted by {current_user.get_username()}.')
+        filename = secure_filename('.'.join([self.id,'json']))
+        file_path = path.join(data, 'questions', filename)
+        remove(file_path)
+        db.session.delete(self)
+        db.session.commit()
+        return True, 'Dataset deleted.'
+    
+    def create(self, upload, default:bool=False):
+        self.generate_id()
+        timestamp = datetime.now()
+        filename = secure_filename('.'.join([self.id,'json']))
+        file_path = path.join(data, 'questions', filename)
+        upload.stream.seek(0)
+        questions = loads(upload.read())
+        with open(file_path, 'w') as file:
+            dump(questions, file, indent=2)
+        self.date = timestamp
+        self.creator = current_user
+        if default: self.make_default()
+        write('system.log', f'New dataset {self.id} added by {current_user.get_username()}.')
+        db.session.add(self)
+        db.session.commit()
+        return True, 'Dataset uploaded.'
+
+    def check_file(self):
+        filename = secure_filename('.'.join([self.id,'json']))
+        file_path = path.join(data, 'questions', filename)
+        if not path.isfile(file_path): return False, 'Data file is missing.'
+
+    def get_file(self):
+        filename = secure_filename('.'.join([self.id,'json']))
+        file_path = path.join(data, 'questions', filename)
+        return file_path