#!/bin/bash

# This is a modified version of the 'imgls' from iTerm2 located at
# https://iterm2.com/utilities/imgls, modified to emit images with the
# Jexer image protocol.

# tmux requires unrecognized OSC sequences to be wrapped with DCS tmux;
# <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It
# only accepts ESC backslash for ST.
function print_osc() {
    if [ x"$TERM" = "xscreen" ] ; then
        printf "\033Ptmux;\033\033]"
    else
        printf "\033]"
    fi
}

function check_dependency() {
  if ! (builtin command -V "$1" > /dev/null 2>& 1); then
    echo "imgcat: missing dependency: can't find $1" 1>& 2
    exit 1
  fi
}

# More of the tmux workaround described above.
function print_st() {
    if [ x"$TERM" = "xscreen" ] ; then
        printf "\a\033\\"
    else
        printf "\a"
    fi
}

function list_file() {
  fn=$1
  test -f "$fn" || return 0

  if [ "${fn: -4}" == ".png" ]; then
      print_osc
      printf '444;1;1;'
      base64 < "$fn"
      print_st
  elif [ "${fn: -4}" == ".jpg" ]; then
      print_osc
      printf '444;2;1;'
      base64 < "$fn"
      print_st
  fi
}

check_dependency base64

if [ $# -eq 0 ]; then
  for fn in *
  do
     list_file "$fn"
  done < <(ls -ls)
else
  for fn in "$@"
  do
     list_file "$fn"
  done
fi