Initial Release

.env.dist

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+CONTAINER_NAME=music_box_api
+IMAGE_NAME=music_box
+EXPOSED_PORT=8000
+
+SPOTIFY_CLIENT_ID=spotifyclientid
+SPOTIFY_CLIENT_SECRET=spotifyclientsecret

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+.idea/

Dockerfile

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+FROM python:3.10-slim
+
+WORKDIR /code
+
+COPY ./requirements.txt /code/requirements.txt
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+
+COPY ./app /code/app

app/container.py

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+from dependency_injector import containers, providers
+
+from app.spotify.service import SpotifyService
+
+
+class Container(containers.DeclarativeContainer):
+    wiring_config = containers.WiringConfiguration(
+        packages=[
+            "app",
+        ]
+    )
+
+    config = providers.Configuration(ini_files=["config.ini"], strict=True)
+
+    spotify_service = providers.Singleton(
+        SpotifyService,
+        client_id=config.spotify.client_id,
+        client_secret=config.spotify.client_secret,
+        redirect_uri=config.spotify.redirect_uri
+    )

app/main.py

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+from fastapi import FastAPI
+from pydantic import TypeAdapter
+
+from app.container import Container
+from app.spotify.router import spotify_router
+from app.system.router import system_router
+
+container = Container()
+
+
+def create_application() -> FastAPI:
+    application = FastAPI(
+        title="MusicBox API",
+        debug=True
+    )
+
+    application.include_router(system_router)
+    application.include_router(spotify_router)
+
+    return application
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run(
+        "app.main:create_application",
+        factory=True,
+        host=container.config.uvicorn.host(),
+        port=int(container.config.uvicorn.port()),
+        log_level=container.config.uvicorn.log_level(),
+        reload=TypeAdapter(bool).validate_python(container.config.uvicorn.reload()),
+    )

app/spotify/exceptions.py

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+class SpotifyError(Exception):
+    """Base class for exceptions in this module."""
+    pass
+
+
+class TrackNotFoundError(SpotifyError):
+    """Exception raised when a track is not found.
+
+    Attributes:
+        message -- explanation of the error
+    """
+
+    def __init__(self, message: str):
+        self.message = message
+
+
+class DeviceNotFoundError(SpotifyError):
+    """Exception raised when a device is not found.
+
+    Attributes:
+        message -- explanation of the error
+    """
+
+    def __init__(self, message: str):
+        self.message = message

app/spotify/router.py

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+from dependency_injector.wiring import inject, Provide
+from fastapi import APIRouter, Depends
+
+from app.container import Container
+from app.spotify.schemas import Device
+from app.spotify.service import SpotifyService
+
+spotify_router = APIRouter()
+
+
+@spotify_router.get("/devices")
+@inject
+def get_devices(
+        spotify_service: SpotifyService = Depends(Provide[Container.spotify_service]),
+) -> list[Device]:
+    return spotify_service.refresh_devices()

app/spotify/schemas.py

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+from pydantic import BaseModel
+
+
+class Device(BaseModel):
+    id: str
+    is_active: bool
+    is_private_session: bool
+    is_restricted: bool
+    name: str
+    supports_volume: bool
+    type: str
+    volume_percent: int
+
+
+class Track(BaseModel):
+    id: str
+
+    @property
+    def uri(self):
+        return f"spotify:track:{self.id}"

app/spotify/service.py

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+import spotipy
+
+from app.spotify.exceptions import DeviceNotFoundError, TrackNotFoundError
+from app.spotify.schemas import Device, Track
+
+
+class SpotifyService:
+    def __init__(
+            self,
+            client_id: str,
+            client_secret: str,
+            redirect_uri: str
+    ) -> None:
+        self.__api = spotipy.Spotify(
+            auth_manager=spotipy.SpotifyOAuth(
+                client_id=client_id,
+                client_secret=client_secret,
+                redirect_uri=redirect_uri,
+                scope="user-read-playback-state,user-modify-playback-state"
+            )
+        )
+
+        self.__devices = self.__get_devices_from_api()
+        self.__current_device_index = 0
+
+    def play(self, track: Track) -> None:
+        current_device = self.get_current_device()
+        if current_device is None:
+            raise DeviceNotFoundError("No device found")
+
+        try:
+            self.__api.transfer_playback(
+                device_id=current_device.id,
+                force_play=False
+            )
+            self.__api.start_playback(
+                device_id=current_device.id,
+                uris=[track.uri]
+            )
+        except spotipy.exceptions.SpotifyException as e:
+            if "Device not found" in e.msg:
+                raise DeviceNotFoundError(e.msg)
+            elif "Invalid track uri" in e.msg:
+                raise TrackNotFoundError(e.msg)
+
+    def refresh_devices(self) -> list[Device]:
+        self.__devices = self.__get_devices_from_api()
+        self.__current_device_index = 0
+        return self.__devices
+
+    def next_device(self) -> Device | None:
+        if len(self.__devices) == 0:
+            return None
+
+        self.__current_device_index = (self.__current_device_index + 1) % len(self.__devices)
+        return self.get_current_device()
+
+    def previous_device(self) -> Device | None:
+        if len(self.__devices) == 0:
+            return None
+
+        self.__current_device_index = (self.__current_device_index - 1) % len(self.__devices)
+        return self.get_current_device()
+
+    def get_current_device(self) -> Device | None:
+        if len(self.__devices) == 0:
+            return None
+
+        return self.__devices[self.__current_device_index]
+
+    def get_devices(self) -> list[Device]:
+        print(self.__devices)
+        return self.__devices
+
+    def __get_devices_from_api(self) -> list[Device]:
+        devices_json = self.__api.devices()["devices"]
+        return [Device(**device) for device in devices_json]

app/system/router.py

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+from fastapi import APIRouter, status
+from starlette.responses import JSONResponse
+
+system_router = APIRouter()
+
+
+@system_router.get("/", include_in_schema=False)
+async def root(self) -> dict[str, str]:
+    return {"message": "MusicBox API"}
+
+
+@system_router.get("/health", include_in_schema=False)
+async def health(self) -> JSONResponse:
+    data = {"music-box-api": status.HTTP_200_OK}
+    return JSONResponse(data, status_code=status.HTTP_200_OK)