webcal-dashboard/kindle/ascwebdash/bin/asc-webdash.py

# bin/python3
# encoding: utf-8

import os
import time
import requests
import logging
import subprocess
import argparse

# Configuration Defaults
EXTENSION_NAME="ascwebdash"
EXTENSION_DIR=f"/mnt/us/extensions/{EXTENSION_NAME}"
LOG_FILE = f"{EXTENSION_DIR}/asc-webdash.py.log"
IMG_URL = "http://10.0.1.113:56733/image"
IMAGE_PATH = f"{EXTENSION_DIR}/received_image.png"
REFRESH_SECONDS=1800

# Configure logging
# logging.basicConfig(
#     filename=LOG_FILE,
#     level=logging.INFO,
#     format="%(asctime)s [%(levelname)s] %(message)s",
#     datefmt="%Y-%m-%d %H:%M:%S",
# )

def fetch_image_from_server(url, save_path):
    """Fetch a IMG file from an HTTP server."""
    logging.info(f"Fetching IMG from {url}")
    try:
        response = requests.get(url, stream=True)
        response.raise_for_status()  # Raise HTTP errors
        with open(save_path, "wb") as image_file:
            for chunk in response.iter_content(1024):
                image_file.write(chunk)
        logging.info(f"Image saved to {save_path}")
        return True
    except Exception as e:
        logging.error(f"Failed to fetch IMG: {e}")
        return False

def refresh_screen_with_image(image_path):
    """Display the IMG image on the Kindle using FBInk."""
    logging.info(f"Displaying image: {image_path}")
    try:
        os.system(f"fbink -i {image_path} > /dev/null 2>&1")
        logging.info("Image displayed successfully.")
    except Exception as e:
        logging.error(f"Failed to display image: {e}")    
    
def set_deep_sleep(enable: bool):
    """
    Enable or disable deep sleep on the Kindle.
    
    Args:
        enable (bool): If True, enables deep sleep. If False, disables deep sleep.
    """
    try:
        # Map boolean argument to corresponding lipc-set-prop value
        lipc_bin = "lipc-set-prop"
        service = "com.lab126.powerd"
        prop = "preventScreenSaver"
        value = "0" if enable else "1"
        subprocess.run(
            [lipc_bin, service, prop, value],
            check=True,
        )
        action = "enabled" if enable else "disabled"
        logging.info(f"Deep sleep {action} successfully.")
        logging.debug(f"Deep sleep {action} successfully.")
    except subprocess.CalledProcessError as e:
        action = "enable" if enable else "disable"
        logging.error(f"Failed to {action} deep sleep: {e}")
        logging.debug(f"Failed to {action} deep sleep: {e}")
        
def get_battery_percentage():
    """Retrieve the Kindle's battery percentage."""
    try:
        # Run the command to get battery percentage
        lipc_bin = "lipc-get-prop"
        service = "com.lab126.powerd"
        prop = "preventScreenSaver"
        result = subprocess.run(
            [lipc_bin, service, prop],
            capture_output=True,
            text=True,
            check=True,
        )
        # Extract and return the percentage as an integer
        return int(result.stdout.strip())
    except Exception as e:
        logging.debug(f"Error retrieving battery percentage: {e}")
        return None

def display_battery_percentage(battery_percentage):
    """Display the battery percentage on the screen using FBInk."""
    try:
        # Construct the message
        message = f"{battery_percentage}%"
        
        # Display the message using FBInk
        os.system(f"fbink -p {message} > /dev/null 2>&1")
        logging.debug("Battery percentage displayed successfully.")
    except Exception as e:
        logging.debug(f"Error displaying battery percentage: {e}")      

def main():
    """Main daemon process."""
    parser = argparse.ArgumentParser()
    # Define optional arguments
    parser.add_argument("--extension-dir", type=str, default=EXTENSION_DIR,
                        help=f"Directory for extensions (default: {EXTENSION_DIR})")
    parser.add_argument("--log-file", type=str, default=LOG_FILE,
                        help=f"Path to the log file (default: {LOG_FILE})")
    parser.add_argument("--img-url", type=str, default=IMG_URL,
                        help=f"URL of the image to download (optional default:{IMG_URL})")
    parser.add_argument("--image-path", type=str, default=IMAGE_PATH,
                        help=f"Path to save the image (default: {IMAGE_PATH})")
    parser.add_argument("--refresh-seconds", type=int, default=REFRESH_SECONDS,
                        help=f"Time in seconds between refreshes (default: {REFRESH_SECONDS})")
 
    logging.info("Script started")
    while True:
        if fetch_image_from_server(IMG_URL, IMAGE_PATH):
            logging.info("Fetching image")
            refresh_screen_with_image(IMAGE_PATH)
            display_battery_percentage(get_battery_percentage())
        else:
            logging.error("Could not fetch or display image.")
        time.sleep(REFRESH_SECONDS)  # Sleep before fetching again 

if __name__ == "__main__":
    # Process command-line arguments
    set_deep_sleep(False)
    main()