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models.py
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models.py
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from datetime import datetime
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
track_artists = db.Table('t_track_artists',
db.Column('track_id', db.String, db.ForeignKey('t_track.track_id')),
db.Column('artist_id', db.String, db.ForeignKey('t_artist.artist_id')))
album_artists = db.Table('t_album_artists',
db.Column('album_id', db.String, db.ForeignKey('t_album.album_id')),
db.Column('artist_id', db.String, db.ForeignKey('t_artist.artist_id')))
class Artist(db.Model):
# Meta
__tablename__ = 't_artist'
created_at_utc = db.Column(db.DateTime, default=datetime.utcnow)
# Payload
artist_id = db.Column(db.String, primary_key=True, index=True)
artist_data = db.Column(db.JSON, nullable=False)
@property
def image_url(self):
last_width = 0
url = None
for image in self.artist_data['images']:
if last_width < image['width']:
last_width = image['width']
url = image['url']
return url
@property
def artist_name(self):
return self.artist_data['name']
@property
def spotify_url(self):
return self.artist_data['external_urls']['spotify']
def to_dict(self):
return {
'id': self.artist_id,
'name': self.artist_name,
'spotify_url': self.spotify_url,
'image_url': self.image_url,
}
class Album(db.Model):
# Meta
__tablename__ = 't_album'
created_at_utc = db.Column(db.DateTime, default=datetime.utcnow)
# Payload
album_id = db.Column(db.String, primary_key=True, index=True)
album_data = db.Column(db.JSON, nullable=False)
# Relationships
artists = db.relationship('Artist', secondary=album_artists)
tracks = db.relationship('Track')
@property
def image_url(self):
last_width = 0
url = None
for image in self.album_data['images']:
if last_width < image['width']:
last_width = image['width']
url = image['url']
return url
@property
def spotify_url(self):
return self.album_data['external_urls']['spotify']
@property
def album_name(self):
return self.album_data['name']
def to_dict(self):
return {
'id': self.album_id,
'name': self.album_name,
'spotify_url': self.spotify_url,
'artists': [a.to_dict() for a in self.artists],
'image_url': self.image_url,
}
class Track(db.Model):
# Meta
__tablename__ = 't_track'
created_at_utc = db.Column(db.DateTime, default=datetime.utcnow)
# Payload
track_id = db.Column(db.String, primary_key=True, index=True)
track_data = db.Column(db.JSON, nullable=False)
album_id = db.Column(db.String, db.ForeignKey('t_album.album_id'), index=True)
audio_feature_data = db.Column(db.JSON)
# Relationships
plays = db.relationship('Play', back_populates='track')
album = db.relationship('Album', back_populates='tracks')
artists = db.relationship('Artist', secondary=track_artists)
@property
def duration(self):
return self.track_data['duration_ms']
@property
def track_name(self):
return self.track_data['name']
@property
def spotify_url(self):
return self.track_data['external_urls']['spotify']
@property
def key(self):
if self.audio_feature_data:
return self.audio_feature_data['key']
@property
def loudness(self):
if self.audio_feature_data:
return self.audio_feature_data['loudness']
@property
def tempo(self):
if self.audio_feature_data:
return self.audio_feature_data['tempo']
@property
def energy(self):
if self.audio_feature_data:
return self.audio_feature_data['energy']
@property
def valence(self):
if self.audio_feature_data:
return self.audio_feature_data['valence']
def to_dict(self):
return {
'id': self.track_id,
'name': self.track_name,
'spotify_url': self.spotify_url,
'duration': self.duration,
'audio_feature': {
'tempo': self.tempo,
'valence': self.valence,
'energy': self.energy,
'key': self.key,
'loudness': self.loudness,
},
'artists': [a.to_dict() for a in self.artists],
'album': self.album.to_dict(),
}
class Play(db.Model):
__tablename__ = 't_play'
created_at_utc = db.Column(db.DateTime, default=datetime.utcnow)
# Payload
played_at_utc_timestamp = db.Column(db.BigInteger, primary_key=True)
played_at_utc = db.Column(db.DateTime, nullable=False)
played_at_cet = db.Column(db.DateTime, nullable=False)
day = db.Column(db.Integer, nullable=False)
month = db.Column(db.Integer, nullable=False)
year = db.Column(db.Integer, nullable=False)
hour = db.Column(db.Integer, nullable=False)
minute = db.Column(db.Integer, nullable=False)
second = db.Column(db.Integer, nullable=False)
day_of_week = db.Column(db.Integer, nullable=False) # Monday: 0, Sunday: 6
week_of_year = db.Column(db.Integer, nullable=False)
track_id = db.Column(db.String, db.ForeignKey('t_track.track_id'), index=True)
user_name = db.Column(db.String, nullable=False)
# Relationship
track = db.relationship('Track', back_populates='plays')
def to_dict(self):
return {
'track': self.track.to_dict(),
'played_at_cet': self.played_at_cet,
}