Music-streaming

Music streaming data design

Create models.py

1. Create User class
   -attribut list:
   id: generate id number for each object
   first_name: str
   last_name: str
   email: str
   password: str
   profile_pic: str
   birth_date: datetime
   level: int, default 0
   

   
   -Optional attributes:
   profile_pic,
   birth_date
   
   -method list:
   --validate_user(self) method which should check if not optional fields are not None and email is valid email,
   and password at least has:
   at least 8 characters
   both uppercase and lowercase letters
   numbers
   at least one special character, e.g., ! @ # ? ]
   --create_playelist(self, name)
   --delete_playelist(self, name)
   
   
   

2. Create class Artist that inherit from user:
   -attribut list:
   about: str
   listeners_count: int
   
   -method list:
   --add_song(self, title: str, artist_name: str, file: string)
   for now file argument should be just file's path on your computer
   --delete_song(self, song_id)
   --create_album(self, title, label, year, list_of_song_url=[])
   --delete_album(self, album_id)
   
   

3. Create Song class.
   -attribute list:
   id: generate id number for each object
   title: str
   artist: str
   duration: int # seconds
   genre: str
   year: int
   created_by: artist
   streams_count: int
   album: album if no album created default create album with same nam as song (for singles)
   
   -method list: --validate(self): if created_by is not an Artist objects raise Exception('Access denied.')
   --add_to_playlist(self, playlist, user)
   --remove_from_playlist(self, playlist, user)
   --play(self, user) # if already exists stop previous track
   --stop(self, user) # increment sream count if played 30 seconds at least
   --download(self) # returns song path for now
   
   

4. Create Playlist class
   -attribute list:
   id: generate id number for each object
   name: str
   date_added: datetime
   created_by: User
   picture_url: picture_url
   
   -property: count_of_songs
   duration_of_playlist
   genre_list
   
   -method_list:
   --play() play all tracks in playlist in order added_date
   --stop()
   
   

5. Create Album class and inherit it from Playlist.
   -attribute list:
   label: str
   year: str
   
   -method list:
   --validate() if created_by is not Artist object raise Exception('Access denied.')
   

6. class SongPlayes
   -attribute list:
   id: generate id number for each object
   user: User
   song: Song
   start_timestamp: float
   

   <br>
   

7. class PlaylistSong: (this class should help to find out song's playlists and playlist's songs)
   -attribut list
   playlist: Playlist
   song: Song
   date_added: datetime
   

Change classes I decribe above as follows: all classes should have

file_path: file where you should save your onjects.__ dict__ info
save all objects in ./data/classname.txt files

methods:
--save(self) should save __ dict__ of objects in file_path as one line

--update(self, ** kwargs): update fields from kwargs if there is any keyword that object cass doesn't have raise Exceptions('{class name} does't have field_1, field_2, ...., use fields from {list of available fields name}) and dict in file_path

--delete(self) should delete current onjects from file_path if exist else raise Exception('No {class name} objects founded')

--@staticmethod
--filter(** kwargs) should find all "dict" in file_path which have all key values from kwargs and return corresponding objects

example: Song.filter(title='Over and over', genre='Alternative') should return all song objects that hase title 'Over and over' and genre 'Alternative'

--@staticmethod
--get(** kwargs) should find a "dict" in file_path which have all key values from kwargs and return corresponding object,
if there is multiple objects raise Exception('Multiple {class name} objects founded')
if there is no dict in file raise Exception('No {class name} objects founded')

Hint: to generate id use uuid3 method of uuid python module and pass uniq string that decribe your object

Create test.py file and create unittests for your models and test all methods

Hint for testing in setUp method create different file path to save your testing objects and in teardown function delete testing file