#!/bin/bash

sock=/var/run/pibox/framebuffer.sock
imgdir=~/img
blackimg='black-x240.png'
imglist=()
sleeptime=10 # seconds
hidecurloutput=1
debug=0

# -S FILE - True if the FILE exists and is a socket.
# https://linuxize.com/post/bash-check-if-file-exists/
if [ ! -S ${sock} ]; then echo Unable to find unix socket. Pls fix.; exit 1; fi
[ "$hidecurloutput" == "1" ] && curlout='-o /dev/null' || curlout=''

trap ctrl_c INT

function ctrl_c() {
 sudo curl -sS --unix-socket ${sock} -X POST --data-binary @${imgdir}/${blackimg} http://localhost/image $curlout
 tput cub 5
 echo exiting
 exit 0
}

function debuglog() {
 [ $debug -eq 0 ] && return
 echo $1
}

function loadimgs() {
 for file in `ls $imgdir`; do
  debuglog "Found image file $file"
  [ ${file} == ${blackimg} ] && continue
  imglist[${#imglist[@]}]=${file}
  debuglog "Loaded image file $file"
 done
}

function displayimg() {
 newimg="${1}"
 debuglog "Displaying image ${1}"
 sudo curl -sS --unix-socket ${sock} -X POST --data-binary @${imgdir}/${newimg} http://localhost/image $curlout
}

loadimgs
debuglog "Image list: ${imglist[@]}"
while true; do
 for thisimg in ${imglist[@]}; do
  displayimg "${thisimg}"
  sleep ${sleeptime}
 done
done