An experimental script for using archiving programs to extract contents into uniquely named files

extract-files.sh

#!/bin/bash

# This script's use is largely overshadowed by 7-zip
# 7z e Archives*.zip -aot -o"Destination Folder" # Rename duplicate filenames
# 7z e Archives*.zip -aoa -o"Destination Folder" # Overwrite duplicate filenames
# 7z e Archives*.zip -aos -o"Destination Folder" # Skip duplicate filenames
# It should be possible to use `7z e Archives*.zip -aos -o"Destination Folder" *.* -r` to avoid
# extracting empty directories, but any such filter, such as *.* or even *, results in no files extracted on Windows.

filecount=0
for archive in $*; do
	if [ "$archive" = "$1" ]; then
		DESTINATIONFOLDER="$1"
		if [ ! -d "$DESTINATIONFOLDER" ]; then
		  if ! mkdir "$DESTINATIONFOLDER"; then
			echo "Could not make directory at $DESTINATIONFOLDER"
			exit
		  fi
		fi
		
		FULLDESTINATIONPATH=$(realpath "$DESTINATIONFOLDER")
		continue
	fi
	
	if [ -e "$archive" ]; then
		archiveextension=$([[ "$archive" = *.* ]] && echo ".${archive##*.}" || echo '')
		case "$archive" in
			.zip)
				photos=$(unzip -Z1 "$archive")
			;;
			.rar)
				photos=$(unrar -lb "$archive")
			;;
			*)
				echo Cannot list files from "$archive" of unknown file type
				exit
			;;
		esac
		
		for photo in $photos; do	
			filename="${photo%.*}"
			extension=$([[ "$photo" = *.* ]] && echo ".${photo##*.}" || echo '')
			writepath=$(echo $(mktemp -u --tmpdir="$FULLDESTINATIONPATH" --suffix=$extension | sed -nr "s/tmp.(.+)/\1/p"))
			
			case "$archive" in
			.zip)
				if ! unzip -jp "$archive" "$photo" > "$writepath"; then
					echo Could not save $photo in $archive to $writepath
				fi
			;;
			.rar)
				if ! unrar p -inul "$archive" "$photo" > "$writepath"; then
					echo Could not save $photo in $archive to $writepath
				fi
			;;
			*)
				echo Cannot extract "$archive" of unknown file type
				exit
			;;
		esac		
			
			filecount=$(($filecount + 1))
		done
	else
		echo Could not find archive $archive
	fi  
  #unrar e "$archive" "$extractFolder"
  #echo $archive
done
echo Added $filecount files to $FULLDESTINATIONPATH