Save chosen options for next time

Now this script creates a save-file from which it loads the option the next time the script is used
Additionally aax-File drag'n'drop works now, at least on Ubuntu.

interactiveAAXtoMP3

@@ -9,7 +9,7 @@
 
 # ===Variables====================================================================================================================================
 
-# Help mesaage
+# Help message
 help=$'\nUsage: interactiveAAXtoMP3 [--advanced] [--help]\n
 --advanced	More options
 --help		Print this message\n'
@@ -22,11 +22,11 @@ advanced=0         # Toggles advanced options on or off.
 while true; do
   case "$1" in
                      # Advanced options.
-    -a | --advanced  ) advanced=1;                                                                                  shift ;;
+    -a | --advanced  ) advanced=1;      shift ;;
                      # Command synopsis.
-    -h | --help      ) echo -e "$help";                                                                             exit ;;
+    -h | --help      ) echo -e "$help"; exit ;;
                      # Anything else stops command line processing.
-    *                )                                                                                              break ;;
+    *                )                  break ;;
   esac
 done
 
@@ -50,12 +50,36 @@ if ! [[ $(type -P "$SED") ]]; then
   exit 1
 fi
 
+# ===Get options from last time===================================================================================================================
+
+# ===Set default values===
+lastcodec="mp3"
+lastcompression="4"
+lastchapters="yes"
+lastauthcode=""
+lastloglevel="1"
+
+# ===Get Values from last time===
+if [ -f "interactive.txt" ]; then
+  for ((i=1;i<=$(wc -l interactive.txt | cut -d " " -f 1);i++)) do
+    line=$(head -$i interactive.txt | tail -1)
+    case $(echo $line | cut -d " " -f 1 | $SED 's/.$//') in
+      codec        ) lastcodec="$(echo $line | cut -d " " -f 2)";;
+      compression  ) lastcompression="$(echo $line | cut -d " " -f 2)";;
+      chapters     ) lastchapters="$(echo $line | cut -d " " -f 2)";;
+      authcode     ) lastauthcode="$(echo $line | cut -d " " -f 2)";;
+      loglevel     ) lastloglevel="$(echo $line | cut -d " " -f 2)";;
+      *            ) rm interactive.txt; exit 1;;
+    esac
+  done
+fi
+
 # ===Get options for AAXtoMP3=====================================================================================================================
 
 # ===Codec===
 while true; do
   clear;
-  read -p "codec (mp3/m4a/m4b/flac/aac/opus): " codec
+  read -e -p "codec (mp3/m4a/m4b/flac/aac/opus): " -i "$lastcodec" codec
   case "$codec" in
     mp3   ) summary="$summary""codec: $codec"; call="$call -e:mp3"; break;;
     m4a   ) summary="$summary""codec: $codec"; call="$call -e:m4a"; break;;
@@ -75,7 +99,7 @@ while true; do
     opus  ) maxlevel=10;;
     *     ) break;;
   esac
-  read -p "compression level (0-$maxlevel): " compression
+  read -e -p "compression level (0-$maxlevel): " -i "$lastcompression" compression
   if [[ $compression =~ ^[0-9]+$ ]] && [[ "$compression" -ge "0" ]] && [[ "$compression" -le "$maxlevel" ]]; then
     summary="$summary""\ncompression level: $compression"
     call="$call --level $compression"
@@ -86,7 +110,7 @@ done
 # ===Chapters===
 while true; do
   clear; echo -e "$summary"
-  read -p "chapters (yes/no/chapternumber to continue with): " chapters
+  read -e -p "chapters (yes/no/chapternumber to continue with): " -i "$lastchapters" chapters
   case "$chapters" in
     ^[0-9]+$  ) summary="$summary""\nchapters: $chapters"; call="$call -c --continue ${chapters}"; break;;
     yes       ) summary="$summary""\nchapters: $chapters"; call="$call -c"; break;;
@@ -97,7 +121,7 @@ done
 # ===Authcode===
 if ! [ -r .authcode ] || [ -r ~/.authcode ]; then
   clear; echo -e "$summary"
-  read -p "Authcode: " authcode
+  read -e -p "Authcode: " -i "$lastauthcode" authcode
   summary="$summary""\nauthcode: $authcode"
   call="$call -A $authcode"
 fi
@@ -105,7 +129,7 @@ fi
 # ===Loglevel===
 while true; do
   clear; echo -e "$summary"
-  read -p "loglevel (0/1/2/3): " loglevel
+  read -e -p "loglevel (0/1/2/3): " -i "$lastloglevel" loglevel
   if [[ $loglevel =~ ^[0-9]+$ ]] && [[ "$loglevel" -ge "0" ]] && [[ "$loglevel" -le "3" ]]; then
     summary="$summary""\nloglevel: $loglevel"
     call="$call -l $loglevel"
@@ -116,6 +140,9 @@ done
 # ===File===
 clear; echo -e "$summary"
 read -p "aax-file: " file
+file="${file%\'}" #remove suffix ' if file is given via drag'n'drop
+file="${file#\'}" #remove prefix ' if file is given via drag'n'drop
+savefile="$summary"
 summary="$summary""\naax-file: $file"
 call="$call $(echo $file | $SED "s;~;$HOME;")"
 
@@ -125,5 +152,8 @@ call="$call $(echo $file | $SED "s;~;$HOME;")"
 clear; echo -e "$summary\n"
 echo -e "$call\n"
 
+# ===Save chosen options===
+echo -e $savefile | $SED "s;\ level:;:;" > interactive.txt
+
 # ===Call AAXtoMP3===
 $call