pexels.sh

Rotate wallpapers of a given collection from Pexels

#!/bin/sh

# Gist: https://gist.github.com/bitsmanent/6ce604a5f09bd77b59fbbdf9dab818d1
# https://www.pexels.com/it-it/api/documentation

# include resource file
. ~/.pexelsrc

# kill another instance if running
mypid=$$
argv0="$(basename "$0")"
pid="$(pgrep -o "$argv0" |grep -v "$mypid")"
if [ -n "$pid" ]; then
	kill "$pid"
	echo "WARNING: killed another instance with pid $pid"
fi

echo "Running at $(date)..."
last_index=0
while true;
do
	nitems=$NITEMS
	if [ $nitems -le 0 ]; then
		# find collection and get total items
		# Note: assume the user has at most 80 collections...
		uri="https://api.pexels.com/v1/collections?per_page=80"
		json="$(curl -sH "Authorization: $APIKEY" "$uri")"
		nitems="$(echo "$json" |sed "s/.*\"$CID\".*\"media_count\":\([0-9]*\).*/\1/")"
	fi

	# prevent using the same index twice
	index="$last_index"
	while [  "$index" = "$last_index" ]; do
		index="$(shuf -zn 1 -i 1-$nitems)"
	done

	last_index="$index"

	# get item url
	qs="per_page=1&page=$index"
	uri="https://api.pexels.com/v1/collections/$CID?$qs"
	json="$(curl -sH "Authorization: $APIKEY " "$uri")"
	pic="$(echo "$json" |sed -n 's/.*"original":"\([^"]*\).*/\1/p')"

	# get screen resolution
	WxH="$(xrandr |grep '*' |cut -d ' ' -f4)"
	w="$(echo "$WxH" |cut -dx -f1)"
	h="$(echo "$WxH" |cut -dx -f2)"

	# set item as wallpaper
	picuri="$pic?auto=compress&cs=tinysrgb&fit=crop&w=$w&h=$h"
	feh --bg-max --no-fehbg "$picuri"

	echo "cid=$CID index=$index $pic" >> "$LOGFILE"
	sleep "$DELAY"
done

Here's a sample ~/.pexelsrc file:

APIKEY="api-key"
CID="collection-id"

# Responses are cached for 24 hours thus adding new images will increment total
# items for a lot of time. Use this variable to bypass the counter. When is set
# to 0 an HTTP request is made to get the number of photos into the collection.
NITEMS=0

DELAY=300
LOGFILE="/tmp/wallpapers.log"