fix: Remove directory based db creation

Previously, if no tonberry.db existed on the SD card, the database was
initialized with a playlist for each directory containing mp3 files,
with the tag serial number matching the directory name. This was used
during development before the web UI to edit the playlist db existed.
It is no longer necessary, and confusing to the user when unusable
playlists are created when albums are preloaded onto the SD card before
putting it in the tonberry device.

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

software/src/main.py

@@ -3,11 +3,9 @@
 
 import aiorepl  # type: ignore
 import asyncio
-from errno import ENOENT
 import machine
 import micropython
 import network
-import os
 import time
 import ubinascii
 import sys
@@ -95,15 +93,6 @@ def run():
     # Setup MP3 player
     with SDContext(mosi=hwconfig.SD_DI, miso=hwconfig.SD_DO, sck=hwconfig.SD_SCK, ss=hwconfig.SD_CS,
                    baudrate=hwconfig.SD_CLOCKRATE):
-        # Temporary hack: build database from folders if no database exists
-        # Can be removed once playlists can be created via API
-        try:
-            _ = os.stat(DB_PATH)
-        except OSError as ex:
-            if ex.errno == ENOENT:
-                print("No playlist DB found, trying to build DB from tag dirs")
-                builddb()
-
         with BTreeFileManager(DB_PATH) as playlistdb, \
              AudioContext(hwconfig.I2S_DIN, hwconfig.I2S_DCLK, hwconfig.I2S_LRCLK) as audioctx:
 
@@ -130,24 +119,6 @@ def run():
             asyncio.get_event_loop().run_forever()
 
 
-def builddb():
-    """
-    For testing, build a playlist db based on the previous tag directory format.
-    Can be removed once uploading files / playlist via the web api is possible.
-    """
-    try:
-        os.unlink(DB_PATH)
-    except OSError:
-        pass
-    with BTreeFileManager(DB_PATH) as db:
-        for name, type_, _, _ in os.ilistdir(b'/sd'):
-            if type_ != 0x4000:
-                continue
-            fl = [b'/sd/' + name + b'/' + x for x in os.listdir(b'/sd/' + name) if x.endswith(b'.mp3')]
-            db.createPlaylistForTag(name, fl)
-    os.sync()
-
-
 def error_blink():
     while True:
         if machine.Pin(hwconfig.BUTTONS[0], machine.Pin.IN, machine.Pin.PULL_UP).value() == 0: