reddit_wallpaper

#!/bin/bash

SUBREDDIT="winterporn"
MIN_WIDTH="1920"
MIN_HEIGHT="1080"
DLPATH="${HOME}/.cache/reddit_wallpaper"

if [ -z "$1" ]; then
    NTH="0"
else
    NTH="$1"
fi

# Define how to set the wallpaper.
# The path to the wallpaper is passed as $1
function set_wallpaper {
    fbsetbg -a "$1"
}

# Grab a wallpaper url from reddit
IMGURL="$((curl "https://www.reddit.com/r/${SUBREDDIT}.json" || exit 1) | jq -r '
  .data.children
| map(select(.data.url | test(".*(jpg|png)$")).data)
| map({url: .url, res: .preview.images[0].source
| del (.url), ups: .ups})
| map(select(.res | .width >= '${MIN_WIDTH}' and .height >= '${MIN_HEIGHT}'))
| sort_by(.ups)
| reverse
| .['${NTH}'].url
')"

# Create wallpaper directory
mkdir -p "${DLPATH}" || exit 1

# Check if this wallpaper is the same as last time
if [ -e "${DLPATH}/lasturl" ]; then
    if [ "${IMGURL}" = "$(cat "${DLPATH}/lasturl")" ]; then
        echo "Wallpaper already downloaded"
        exit 1
    fi
fi

# Download the wallpaper to a temporary location
wget "${IMGURL}" -O "${DLPATH}/dl" || exit 1

# Overwrite the last wallpaper with the finished download
mv "${DLPATH}/dl" "${DLPATH}/wallpaper" || exit 1

# Save last url to avoid unecessary downloads
echo "${IMGURL}" > "${DLPATH}/lasturl"

# Set wallpaper
set_wallpaper "${DLPATH}/wallpaper"