KDE5 - Set National Geographic Picture of a Day to Desktop

ng_image_skin.sh

#!/bin/bash
# This script downloads photo of the day from nationalgeographic.com and set it as desktop wallpaper.
# Applicable for Ubuntu KDE 18.04
# Permission to copy, modify, and distribute is granted under GPLv3
# Last Revised 7 Mar 2019
#
# Initial installation:
# Place the script into /usr/local/bin/ng_image_skin
# Run it to pull image and create symlink to it which will be lcocated at ~/Picture/Wallpapers/wp_image
# Set desktop image manually that pointed to ~/Picture/Wallpapers/wp_image
# Add the script to autoload list. 
# Next time after system boot new image will be authomatically downloaded and wp_image symlink will be pointed to new image.
# Launch following command in console to debug plasmashell script:
# qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.showInteractiveConsole

# Define initial vars
# Image Source Page
IMG_SOURCE='https://www.nationalgeographic.com/photography/photo-of-the-day/';

#Symlink path
SYMLINK_PATH="${HOME}/Pictures/Wallpapers/wp_image";

SYMLINK_DIR=$(dirname $SYMLINK_PATH);
#######################

function get_page {
imgUrl="$(wget -qO- $IMG_SOURCE |
grep -Eoi '<meta property=\"og:image\" content=\"[^>]+>' |
grep -Eo 'content=\"[^\\"]+\"' |
grep -Eo '(http|https)://[^\"]+')";
imgUrl=${imgUrl%/}
}

# Set new desktop img path
function reset_desktop_img() {
  img_file_path=$1;

    ## For gnome
    # gsettings set org.gnome.desktop.background picture-uri "file://${SYMLINK_PATH}"

    ## For kde
    dbus-send --session --dest=org.kde.plasmashell --type=method_call /PlasmaShell org.kde.PlasmaShell.evaluateScript "string:
    var Desktops = desktops();
    for (i=0;i<Desktops.length;i++) {
            d = Desktops[i];
            d.wallpaperPlugin = 'org.kde.image';
            d.currentConfigGroup = Array('Wallpaper',
                                        'org.kde.image',
                                        'General');
            d.writeConfig('Image', 'file://${img_file_path}');
    }" > /dev/null 2>&1;
}

# Check for network
while [ -z "`curl -s --head https://google.com/ | head -n 1 | grep 'HTTP'`" ]
do
	echo "Network is down. Waiting for connection."
	sleep 60
done
#######################

# Getting the image URL
get_page;

if [ -n "$imgUrl" ]
then
    CURR_DATE=`date +%Y-%m-%d`;
    IMAGE_FILENAME=`echo $CURR_DATE$USER | md5sum | cut -d ' ' -f 1`".jpg";
    img_file_path="${SYMLINK_DIR}/${IMAGE_FILENAME}";

    wget --quiet -O $img_file_path $imgUrl;
    echo "Wallpaper downloaded successfully and saved as ${img_file_path}"

    reset_desktop_img "$img_file_path";

else
    echo "Wallpaper not found"
fi
#######################