Refined Parameterparsing

AAXtoMP3

@@ -6,6 +6,7 @@ codec=libmp3lame
 extension=mp3
 mode=chaptered
 authcode=".authcode";
+auth="";
 if [ -z ${HOME+x} ] && ! [ -z ${USERPROFILE+x} ]; then HOME="$USERPROFILE"; fi
 authcodeDirs="${HOME}/ ./"
 GREP=$(grep --version | grep -q GNU && echo "grep" || echo "ggrep")
@@ -23,44 +24,77 @@ if ! [[ $(type -P ffmpeg) ]]; then
     exit 1
 fi
 
+function print_manual(){
+    echo ""
+	echo "Usage: bash AAXtoMP3 [--flac] [--aac] [--opus ] [--single] --auth=AUTHCODE {FILES}"
+    echo "	Note that when you enter conflicting parameters, the last one will be the one used."
+    echo "	You HAVE to use the equals-sign. You may also use -a=AUTHCODE. But the '=' is mandatory."
+    echo "	Everything after the authcode must be a filename to a file which you want to convert"
+    echo ""
+    echo "		[--flac]: The flac codec is used in the resulting files. Default is MP3"
+    echo "		[--aac]: The aac codec is used in the resulting files. Default is MP3"
+    echo "		[--opus]: The opus codec is used in the resulting files. Default is MP3"
+    echo "		[--single] : Prevents creation of chapters. Results in a single file."
+    echo "		--authcode=XXXXXXXX: Your personal autcode. Everything after this parameter will be used as an inputfile!"
+    echo "		{FILES}: Files to convert, seperated by spaces."
+    echo ""
+}
+
 
 if [ "$#" -eq 0 ]; then
-        echo "Usage: bash AAXtoMP3 [--flac] [--aac] [--opus ] [--single] AUTHCODE {FILES}"
-        echo "Note that any optional flags have to be inputed in order to function correctly."
-        echo "[--flac]  : The flac codec is used in the resulting files. Default is MP3"
-        echo "[--aac]   : The aac codec is used in the resulting files. Default is MP3"
-        echo "[--opus]  : The opus codec is used in the resulting files. Default is MP3"
-        echo "[--single]: Prevents creation of chapters. Results in a single file."
-        exit 1
+	print_manual
+    exit 1
 fi
 
-if [[ "$1" = '--flac' ]]
-then
-    codec=flac
-    extension=flac
-    shift
+
+if [[ "$1" = '-h' ]]; then
+	print_manual
+    exit 1
+fi
+if [[ "$1" = '--help' ]]; then
+	print_manual
+    exit 1
 fi
 
-if [[ "$1" == '--aac' ]]
-then
-    codec=copy
-    extension=m4a
-    mode=single
-    shift
-fi
 
-if [[ "$1" = '--opus' ]]
-then
-    codec=libopus
-    extension=ogg
-    shift
-fi
+#Iterate over the parameter to find all entered ones
+for var in "$@"
+do
+    
+	if [[ "$var" = '--flac' ]]
+	then
+		codec=flac
+		extension=flac
+		shift
+	fi
+
+	if [[ "$var" == '--aac' ]]
+	then
+		codec=copy
+		extension=m4a
+		mode=single
+		shift
+	fi
+
+	if [[ "$var" = '--opus' ]]
+	then
+		codec=libopus
+		extension=ogg
+		shift
+	fi
+	
+	if [[ "$var" == '--single' ]]
+	then
+		mode=single
+		shift
+	fi
+	
+	case "$var" in
+		-a=*|--auth=*) echo "found";
+		auth="${var#*=}";
+	esac
+done
 
-if [[ "$1" == '--single' ]]
-then
-    mode=single
-    shift
-fi
 
 auth_code="";
 for dir in $authcodeDirs; do
@@ -79,6 +113,10 @@ else
 	auth_code=`head -1 "$codeFile"`
 fi
 
+if [ -z "$auth_code" ]; then
+	auth_code="$auth";
+fi;
+
 if [ -z "$auth_code" ]; then
 	echo "INFO: Sorry, no authcode provided.";
 	exit 1;