File hoster compatible mass extract (bash script)

#!/bin/bash
# Extract-Script by RB

echo ""
echo "*** Mass-Extract ***"

pattern='/media/Ric2TB/Downloads/(.+)part([^1-9]*)1.rar'

ALLFILES=/media/Ric2TB/Downloads/*.rar

echo ""
echo "Passworteingabe (Keine Eingabe ueberspringt die jeweilige Datei, - (minus) entpackt Datei ohne Passwort)"
echo ""

i=0
for f in $ALLFILES
do
    if [[ $f =~ $pattern ]]; then
        read -p "$f: " pw

        FILES[$i]=$f
        PASSWORDS[$i]=$pw
        (( i++ ))
    fi
done

echo ""
echo ""

x=0
i=0
for f in "${FILES[@]}"
do
    PASSWORD=${PASSWORDS[$i]}
    if [ -n "$PASSWORD" ]; then
        if [ $PASSWORD == "-" ]; then
            unrar x -o+ -p- $f
        else
            unrar x -o+ -p$PASSWORD $f
        fi
        (( x++ ))
    fi
    (( i++ ))
done

echo ""
echo "Dateien bearbeitet: $x"
echo ""
echo "*** Mass-Extract abgeschlossen ***"
echo ""