RaspPi integration plan

plan.md

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+To design a self-running app for your Raspberry Pi based on your requirements, here’s a step-by-step plan that you can follow. I'll guide you through the steps without giving the full solution, so you can piece it together.
+
+### Steps to Implement
+
+1. **Automating Raspberry Pi Startup Actions:**
+   - **Systemd Service**: Use `systemd` to create a service that will automatically run when the Pi starts. This can manage your app’s startup logic.
+   - **Startup Script**: Alternatively, you can create a simple shell script that runs on boot, either placed in `/etc/rc.local` or managed by `cron` with the `@reboot` directive.
+
+2. **Detect USB Flash Drive on Boot:**
+   - **Automounting USB**: Set up the Raspberry Pi to automount flash drives when plugged in. Look into editing `/etc/fstab` or using the `usbmount` package.
+   - **Checking for MP3s**: Write Python logic that checks the mounted drives for files with `.mp3` extension. Use libraries like `os` or `pathlib` to scan directories.
+
+3. **Copying MP3s to a Directory:**
+   - You can use the `shutil` library in Python to handle file copying.
+   - Ensure this logic only triggers when new files are found (so you don’t overwrite your existing directory unnecessarily).
+
+4. **Running the Database Generator:**
+   - Since you only want the database generator to run when needed, you can add a condition to check whether the MP3s were updated. For example, store a checksum or file modification time, and if there's a change, trigger the generator.
+
+5. **Running the Flask Web Server:**
+   - After copying the files and running the database generator (if needed), the script should launch your Flask web server.
+   - Flask can be run as part of your startup service as well, once the other tasks are complete.
+
+### Suggested Order of Operations
+- On boot, run your startup script.
+- Check for connected USB drives.
+- If MP3s are found, copy them to the designated folder.
+- Run the database generator only if new files are detected.
+- Launch the Flask web server.
+
+### Things to Consider:
+- **Timing**: If there’s a delay for the USB drive to mount, you might want to add a short wait period or a retry loop when checking for the flash drive.
+- **Combining Files**: You can combine the MP3-checking, copying, and database generation logic into a single Python script. Then, it can conditionally call the database generator only when new files are added, before starting the Flask server.