implement backup and restore draft 1

+ add extra fields for backup in favorites and scrobble data
- not yet for the playlist tracks

TODO.md

@@ -43,6 +43,7 @@
   - New table to hold similar artist entries
   - Create 2 way relationships, such that if an artist A is similar to another B with a certain weight,
     then artist B is similar to A with the same weight, unless overwritten.
+- Clean up tempfiles after transcoding
 
 # Bug fixes
 

app/api/__init__.py

@@ -31,6 +31,7 @@ from app.api import (
     getall,
     auth,
     stream,
+    backup_and_restore
 )
 
 # TODO: Move this description to a separate file
@@ -107,6 +108,7 @@ def create_api():
         app.register_api(settings.api)
         app.register_api(colors.api)
         app.register_api(lyrics.api)
+        app.register_api(backup_and_restore.api)
 
         # Plugins
         app.register_api(plugins.api)

app/api/backup_and_restore.py

@@ -0,0 +1,78 @@
+from dataclasses import asdict
+import json
+from pathlib import Path
+import shutil
+from time import time
+from flask_openapi3 import Tag
+from flask_openapi3 import APIBlueprint
+from app.api.auth import admin_required
+
+from app.db.userdata import FavoritesTable, PlaylistTable, ScrobbleTable
+from app.settings import Paths
+
+bp_tag = Tag(name="Backup and Restore", description="Backup and Restore")
+api = APIBlueprint("backup_and_restore", __name__, url_prefix="/", abp_tags=[bp_tag])
+
+
+@api.post("/backup")
+@admin_required()
+def backup():
+    """
+    Create a backup file of your favorites, playlists and scrobble data.
+    """
+    backup_dir = Path(Paths.get_app_dir()) / "backup"
+    backup_dir.mkdir(parents=True, exist_ok=True)
+    backup_name = f"backup.{int(time())}"
+    backup_file = backup_dir / f"{backup_name}.json"
+
+    # INFO: Image folder for playlist images
+    img_folder = backup_dir / "images" / backup_name
+    img_folder.mkdir(parents=True, exist_ok=True)
+
+    favorites = FavoritesTable.get_all()
+    favorites = [asdict(entry) for entry in favorites]
+
+    scrobbles = ScrobbleTable.get_all(start=0)
+    scrobbles = [asdict(entry) for entry in scrobbles]
+
+    # SECTION: Playlists
+    playlists = PlaylistTable.get_all()
+    playlist_dicts = []
+
+    for entry in playlists:
+        playlist = asdict(entry)
+        for key in ["_last_updated", "has_image", "images", "duration", "count"]:
+            del playlist[key]
+
+        playlist_dicts.append(playlist)
+
+        # copy images
+        if playlist["thumb"]:
+            img_path = Path(Paths.get_playlist_img_path()) / playlist["thumb"]
+            shutil.copy(img_path, img_folder / playlist["thumb"])
+
+    # !SECTION
+
+    data = {
+        "favorites": favorites,
+        "scrobbles": scrobbles,
+        "playlists": playlist_dicts,
+    }
+
+    with open(backup_file, "w") as f:
+        json.dump(data, f, indent=4)
+
+    return {
+        "msg": "Backup created",
+        "data_path": str(backup_file),
+        "images_path": str(img_folder),
+    }, 200
+
+
+@api.post("/restore")
+@admin_required()
+def restore():
+    """
+    Restore your favorites, playlists and scrobble data from a backup file.
+    """
+    return {"msg": "Restore"}

app/api/favorites.py

@@ -7,6 +7,7 @@ from pydantic import BaseModel, Field
 from app.api.apischemas import GenericLimitSchema
 from app.db.libdata import TrackTable
 from app.db.userdata import FavoritesTable
+from app.lib.extras import get_extra_info
 from app.models import FavType
 from app.settings import Defaults
 
@@ -71,9 +72,12 @@ def toggle_favorite(body: FavoritesAddBody):
     """
     Adds a favorite to the database.
     """
+    extra = get_extra_info(body.hash, body.type)
 
     try:
-        FavoritesTable.insert_item({"hash": body.hash, "type": body.type})
+        FavoritesTable.insert_item(
+            {"hash": body.hash, "type": body.type, "extra": extra}
+        )
     except:
         return {"msg": "Failed! An error occured"}, 500
 

app/api/scrobble/__init__.py

@@ -4,6 +4,7 @@ from pydantic import Field
 from app.api.apischemas import TrackHashSchema
 
 from app.db.userdata import ScrobbleTable
+from app.lib.extras import get_extra_info
 from app.settings import Defaults
 from app.store.albums import AlbumStore
 from app.store.artists import ArtistStore
@@ -39,7 +40,9 @@ def log_track(body: LogTrackBody):
     if trackentry is None:
         return {"msg": "Track not found."}, 404
 
-    ScrobbleTable.add(dict(body))
+    scrobble_data = dict(body)
+    scrobble_data["extra"] = get_extra_info(body.trackhash, "track")
+    ScrobbleTable.add(scrobble_data)
 
     # Update play data on the in-memory stores
     track = trackentry.tracks[0]

app/api/stream.py

@@ -247,23 +247,11 @@ def send_file_as_chunks(filepath: str) -> Response:
             while remaining_bytes > 0 or retry_count < max_retries:
                 if retry_count == max_retries:
                     print("💚 sending final chunk! ...")
-                    return (
-                        file.read(os.path.getsize(filepath) - file.tell()),
-                        file.tell(),
-                        True,
-                    )
-                print("\n\n")
-                print(f"file: {filepath}")
-                print(f"start: {start}")
-                print(f"end: {end}")
-                print(f"filesize: {os.path.getsize(filepath)}")
-                print(f"⭐ (O) Remaining bytes: {remaining_bytes}")
-                print(f"⭐ Remaining bytes: {remaining_bytes}")
-                print(f"⭐ Cursor position: {file.tell()}")
-                # Read the chunk size or all the remaining bytes
 
-                print(f"💚 remaining_bytes: {remaining_bytes}")
-                print(f"💚 retry_count: {retry_count}")
+                    pos = file.tell()
+                    chunk = file.read(os.path.getsize(filepath) - pos)
+
+                    return chunk, pos, True
 
                 if remaining_bytes < chunk_size:
                     time.sleep(0.25)
@@ -303,7 +291,6 @@ def send_file_as_chunks(filepath: str) -> Response:
         f"bytes {start}-{position}/{os.path.getsize(filepath) + bytes_to_add}",
     )
     response.headers.add("Accept-Ranges", "bytes")
-    response.headers.add("Content-Length", str(len(data or [])))
     return response
 
 

app/db/userdata.py

@@ -266,7 +266,7 @@ class ScrobbleTable(Base):
         return cls.insert_one(item)
 
     @classmethod
-    def get_all(cls, start: int, limit: int | None):
+    def get_all(cls, start: int, limit: int | None = None):
         result = cls.execute(
             select(cls)
             .where(cls.userid == get_current_userid())

app/lib/extras.py

@@ -0,0 +1,37 @@
+from typing import Any
+from app.store.albums import AlbumStore
+from app.store.artists import ArtistStore
+from app.store.tracks import TrackStore
+
+
+def get_extra_info(hash: str, type: str):
+    """
+    Generates extra info for a track, album or artist, which will be stored
+    in the database (in favorites, playlists and scrobble data) for backup and restore.
+
+    The extra info contains all the fields needed to reconstruct the itemhash. The track contains an additional filepath field which can be used to locate the file when restoring.
+    """
+    extra: dict[str, Any] = {}
+
+    if type == "track":
+        trackentry = TrackStore.trackhashmap.get(hash)
+        if trackentry is not None:
+            track = trackentry.get_best()
+
+            extra["filepath"] = track.filepath
+            extra["title"] = track.title
+            extra["artists"] = [a["name"] for a in track.artists]
+            extra["album"] = track.albumhash
+
+    elif type == "album":
+        album = AlbumStore.get_album_by_hash(hash)
+        if album is not None:
+            extra["albumartists"] = [a["name"] for a in album.albumartists]
+            extra["title"] = album.title
+
+    elif type == "artist":
+        artist = ArtistStore.get_artist_by_hash(hash)
+        if artist is not None:
+            extra["name"] = artist.name
+
+    return extra