#!/bin/bash

ROOT="/opt/asterisk-1.2.7.1/var/spool/voicemail"
LOG="/var/log/asterisk/vm-audio"

CONTEXT="${1}"
EXTEN="${2}"
COUNT="${3}"

VMDIR="${ROOT}/${CONTEXT}/${EXTEN}/INBOX"
echo "Checking ${VMDIR}" >> ${LOG}

checkExit() {
   if ! [ "${1}" = "0" ]; then
      echo "${2}" >> ${LOG}
      exit 1
   fi
}

if ! [ -d "${VMDIR}" ]; then
    checkExit 1 "${VMDIR} is not a directory"
fi

for file in $( ls -1 ${VMDIR}/*.txt 2>> ${LOG} ); do
    FIXCOUNT=$( grep -c "volume-fix" ${file} 2>> ${LOG} )

    if [ ${FIXCOUNT} = 0 ]; then
        BASE=$( echo "${file}" |  sed -e "s/.txt$//" 2>> ${LOG} )
        VMFILE="${BASE}.WAV"
        SCALE=$( sox "${VMFILE}" -e stat -v 2>&1 )

        if ! [ $? = 0 ]; then        
           echo "Unable to convert file: ${VMFILE}" >> ${LOG}
           continue
        fi

        if ! [ "${SCALE}" = "1.000" ]; then
           NFILE="/tmp/${$}.wav"
           sox ${VMFILE} -v ${SCALE} ${NFILE} >> ${LOG} 2>&1

           if ! [ $? = 0 ]; then
               echo "Unable to scale file: ${VMFILE}" >> ${LOG}
               rm -f ${NFILE} > /dev/null 2>> ${LOG}
               continue
           fi

           mv -f "${NFILE}" "${VMFILE}" > /dev/null 2>> ${LOG}
           echo "volume-fix=true" >> ${file} 2>> ${LOG}
        fi
    fi
    
done