iterm2 multi cat chooses to run regular cat or imgcat based on file extension

iterm2-multi-cat.bash

# iterm2 has some tools that you can install. imgcat displays images on the command line. 
# this command will flexibly choose the specific cat cmd to run based on the extension.
# you can add this to your ~/.profile or whichever other file you've configured for your shell.

# run iterm shell integration for each shell. See utilities here: https://iterm2.com/documentation-utilities.html
source ~/.iterm2_shell_integration.bash

# run different cat cmds based on extension. If img then run imgcat (which is installed with iterm2_shell_integration
function cat() {
	fullfile="$1"
	filename=$(basename -- "$fullfile")
	extension="${filename##*.}"
	#filename="${filename%.*}"
	#lcextension="$(tr [A-Z] [a-z] <<< $extension)"
	lcextension=`tr [A-Z] [a-z] <<< "$extension"`
	echo "Lower case extension is:" $lcextension

	images=("jpg" "jpeg" "png" "webp" "bmp" "tiff")

	if [[ ${images[@]} =~ $lcextension ]]
	then
	  imgcat "$fullfile"
	else
	  /bin/cat "$fullfile"
	fi
}