class TrackedStock(db.Model):
id = db.Column(db.Integer, primary_key=True)
symbol = db.Column(db.String(10), unique=False, nullable=False)
timestamp = db.Column(db.DateTime, nullable=False)
user_id = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
user = db.relationship(User, backref=db.backref('tracking'))
aggregate_id = db.Column(db.Integer,
db.ForeignKey(TrackedAggregate.id),
nullable=False)
aggregate = db.relationship(TrackedAggregate,
backref=db.backref('tracking'))
def __init__(self, aggregate, user=None):
self.symbol = aggregate.symbol
self.user = user
self.aggregate = aggregate
self.timestamp = datetime.datetime.now()
def __repr__(self):
return \
"TrackedStock(symbol='{symbol}', user='******')" \
.format(**self.to_dict())
def to_dict(self):
return {
'symbol': self.symbol,
'user': self.user.username if self.user else 'None',
'timestamp': '{:%Y-%m-%d %H:%M}'.format(self.timestamp),
'id': self.id
}
class StockAsset(db.Model):
id = db.Column(db.Integer, primary_key=True)
symbol = db.Column(db.String(10), unique=False, nullable=False)
init_value = db.Column(db.Float, nullable=False)
shares = db.Column(db.Integer, nullable=False)
is_short = db.Column(db.Boolean, nullable=False)
timestamp = db.Column(db.DateTime, nullable=False)
user_id = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
user = db.relationship(User, backref=db.backref('portfolio'))
aggregate_id = db.Column(db.Integer,
db.ForeignKey(StockAggregate.id),
nullable=False)
aggregate = db.relationship(StockAggregate, backref=db.backref('assets'))
def __init__(self, user, aggregate, short=False):
self.symbol = aggregate.symbol
self.init_value = 0
self.shares = 0
self.is_short = short
self.user = user
self.aggregate = aggregate
self.timestamp = datetime.datetime.utcnow()
def clean_up(self):
print(self.shares * self.current_price, 'to balance of',
self.user.balance)
update_balance_records(
self.user.balance + self.shares * self.current_price, self.user)
self.shares = 0
def __repr__(self):
return \
"StockAsset(symbol='{symbol}', user='******', short={short})" \
.format(**self.to_dict())
def to_dict(self):
return {
'symbol':
self.symbol,
'company':
self.aggregate.company,
'init_value':
self.init_value,
'prev_price':
self.aggregate.prev_price,
'current_price':
self.aggregate.current_price,
'shares':
self.shares,
'short':
self.is_short,
'user':
self.user.username,
'user_id':
self.user.id,
'timestamp':
'{:%Y-%m-%d %H:%M}'.format(self.timestamp),
'prev_timestamp':
'{:%Y-%m-%d %H:%M}'.format(self.aggregate.prev_timestamp),
'id':
self.id
}
def add_shares(self, num_shares):
change = num_shares * self.aggregate.current_price
print(change, 'from balance of', self.user.balance)
print(num_shares, 'at', self.aggregate.current_price)
self.shares += num_shares
self.init_value += self.aggregate.current_price * num_shares
update_balance_records(self.user.balance - change, self.user)
def sell_shares(self, num_shares):
change = num_shares * self.aggregate.current_price
if self.is_short:
change = 2 * (self.init_value / self.shares * num_shares
) - num_shares * self.aggregate.current_price
print(change, 'to balance of', self.user.balance)
self.init_value -= self.init_value / self.shares * num_shares
self.shares -= num_shares
# self.init_value -= self.aggregate.current_price * num_shares
update_balance_records(self.user.balance + change, self.user)
def update_price(self, change):
# change = self.shares * (new_price - self.aggregate.current_price)
change *= self.shares
change = -1 * change if self.is_short else change
# print(self.symbol, 'short asset' if self.is_short else 'stock asset', 'changed by', change)
if change:
# self.current_price = new_price
update_balance_records(self.user.balance, self.user)
class StockTransaction(db.Model):
id = db.Column(db.Integer, primary_key=True)
symbol = db.Column(db.String(10), unique=False, nullable=False)
company = db.Column(db.String(255), unique=False, nullable=True)
price = db.Column(db.Float, nullable=False)
shares = db.Column(db.Integer, nullable=False)
is_short = db.Column(db.Boolean, nullable=False)
is_purchase = db.Column(db.Boolean, nullable=False)
timestamp = db.Column(db.DateTime, nullable=False)
user_id = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
user = db.relationship(User, backref=db.backref('transactions'))
asset_id = db.Column(db.Integer,
db.ForeignKey(StockAsset.id),
nullable=True)
asset = db.relationship(StockAsset, backref=db.backref('transactions'))
def __init__(self, shares, asset, purchase=True):
self.symbol = asset.symbol
self.company = asset.aggregate.company
self.price = asset.aggregate.current_price
self.shares = shares
self.is_short = asset.is_short
self.is_purchase = purchase
self.user = asset.user
self.asset = asset
self.timestamp = datetime.datetime.utcnow()
if purchase:
self.asset.add_shares(shares)
else:
self.asset.sell_shares(shares)
def __repr__(self):
return \
"StockTransaction(symbol='{symbol}', shares={shares}, short={short}, purchase={purchase}, user='******')" \
.format(**self.to_dict())
def to_dict(self):
return {
'symbol': self.symbol,
'company': self.company,
'price': self.price,
'shares': self.shares,
'short': self.is_short,
'purchase': self.is_purchase,
'user': self.user.username,
'user_id': self.user.id,
'timestamp': '{:%Y-%m-%d %H:%M}'.format(self.timestamp),
'id': self.id
}
@validates('shares')
def validate_num_shares(self, key, shares):
assert int(shares) == shares, 'Invalid shares value.'
assert shares > 0, 'Invalid shares value.'
return shares
@validates('user')
def validate_user(self, key, user):
if self.is_purchase:
transaction = self.price * self.shares
assert user.balance - transaction >= 0, 'Invalid funds.'
return user
@validates('asset')
def validate_asset(self, key, asset):
if not self.is_purchase:
assert asset.shares >= self.shares, 'Not enough shares to sell.'
return asset
class MonthlyRecord(RecordMixin, db.Model):
user = db.relationship(User, backref=db.backref('monthly_records'))
class WeeklyRecord(RecordMixin, db.Model):
user = db.relationship(User, backref=db.backref('weekly_records'))
class LatestRecord(RecordMixin, db.Model):
user = db.relationship(User, backref=db.backref('latest_records'))