"""Track model class"""

__tablename__ = 'tracks'

id = db.Column(db.Integer, primary_key=True)

name = db.Column(db.String, nullable=False)

description = db.Column(db.Text)

color = db.Column(db.String, nullable=False)

sessions = db.relationship('Session', backref='track')

event_id = db.Column(db.Integer, db.ForeignKey('events.id', ondelete='CASCADE'))

@staticmethod

def get_service_name():

return 'track'

def __repr__(self):

return '<Track %r>' % self.name

@property

def font_color(self):

if self.color.startswith('#'):

h = self.color.lstrip('#')

a = (

1

- (

0.299 * int(h[0:2], 16)

+ 0.587 * int(h[2:4], 16)

+ 0.114 * int(h[4:6], 16)

)

/ 255

)

elif self.color.startswith('rgba'):

h = self.color.lstrip('rgba').replace('(', '', 1).replace(')', '', 1)

h = h.split(',')

a = (

1

- (0.299 * int(h[0], 16) + 0.587 * int(h[1], 16) + 0.114 * int(h[2], 16))

/ 255

)