Enhanced Posttorrent Transmission script

#!/bin/bash
# posttorrent.sh created by Killemov
# updated by Jordan Oxborrow 2015-02-23
{
        umask 0002

        # Log file, file where we tell what events have been processed.
        LOG_FILE="/var/log/transmission-daemon/posttorrent.log"

        # Username for transmission remote
        TR_USERNAME="username"

        # Password for transmission remote
        TR_PASSWORD="password"

        # Directory torrent is in to assume it's a TV show
        TV_SHOW_DIR="/path/to/tvshows"

        # Directory torrent is in to assume it's a movie
        MOVIE_DIR="/path/to/movies"

        # Directory to move post-post-processed torrent data to
        SEED_DIR="/path/to/seeding"

        # Haven't done anything  with this information yet
        tv_show_extensions="avi,mkv,divx,mp4,srt,idx,sub"
        movie_extensions="avi,mkv,divx,mp4,ts,iso,img,srt,idx,sub"

        tv_show_extensions_rev="\.$(echo $tv_show_extensions | sed 's;,;\$\|\\\.;g')$"
        movie_extensions_rev="\.$(echo $movie_extensions | sed 's;,;\$\|\\\.;g')$"

        # Get current time.
        NOW=$(date +%Y-%m-%d\ %H:%M:%S)

        # Build Transmission command
        TR_CMD="transmission-remote -n "${TR_USERNAME}":"${TR_PASSWORD}" -t ${TR_TORRENT_HASH}"

        # Source directory, should not be changed.
        SRC_DIR="${TR_TORRENT_DIR}/${TR_TORRENT_NAME}"

        # Directory to store the un-compressed files in..
        DEST_DIR="${TR_TORRENT_DIR}/${TR_TORRENT_NAME}/"

        ## Actual processing starts here.

        echo $NOW "Initializing posttorrent script for $TR_TORRENT_NAME" >> $LOG_FILE

        cd "$TR_TORRENT_DIR"

        # Check for any RAR files
        if [ -d "$SRC_DIR" ]; then
                IFS=$'\n'
                unset RAR_FILES i
                for RAR_FILE in $( find "$SRC_DIR" -type f -iname "*.rar" ); do
                        if [[ $RAR_FILE =~ .*part.*.rar ]]; then
                                if [[ $RAR_FILE =~ .*part0*1.rar ]]; then
                                        RAR_FILES[i++]=$RAR_FILE
                                fi
                        else
                                RAR_FILES[i++]=$RAR_FILE
                        fi
                done
                unset IFS

        # UnRAR any RAR files to the parent directory
                if [ ${#RAR_FILES} -eq 0 ]; then
                        echo $NOW "Did not identify RAR files in $TR_TORRENT_NAME" >> $LOG_FILE
                else
                        echo $NOW "Identified RAR files in $TR_TORRENT_NAME" >> $LOG_FILE
                        for RAR_FILE in "${RAR_FILES[@]}"; do
                                nice -n15 unrar x -y -o+ -p- -inul "$RAR_FILE" "${TR_TORRENT_DIR}"
                                if [ $? -gt 0 ]; then
                                        echo $NOW "Error unrarring $TR_TORRENT_NAME: Forcing torrent re-verify and exiting script" >> $LOG_FILE
                                        transmission-remote -n $TR_USERNAME:$TR_PASSWORD -t $TR_TORRENT_HASH --verify --start
                                        exit 1
                                fi
                        done
                                echo $NOW "Unrarred $TR_TORRENT_NAME" >> $LOG_FILE
                fi

        fi

        ## TV Show specific actions
        if [[ "$SRC_DIR" =~ "$TV_SHOW_DIR" ]]; then

                echo $NOW "Identified $TR_TORRENT_NAME as a TV show" >> $LOG_FILE

        # Actions to perform if the torrent data is fils in a directory
        # The unrarred files should already be in $TVSHOW_DIR now.
        # Hard link supported filetypes to $TVSHOW_DIR. Move torrent data to $SEED_DIR.
                if [ -d "$SRC_DIR" ]; then
                                for _supported_file in $(find "${SRC_DIR}" -type f | egrep -i "${tv_show_extensions_rev}"); do
                                        echo $NOW "Creating hardlink to $_supported_file" >> $LOG_FILE
                                        ln -f "${_supported_file}" "${TR_TORRENT_DIR}/$(basename ${_supported_file})"
                                done
                                echo $NOW "Telling Transmission to move $TR_TORRENT_NAME to $SEED_DIR" >> $LOG_FILE
                                $TR_CMD --move "${SEED_DIR}"

        # Actions to perform if TV show is a single file
        # Make hard link to seeding dir and tell Transmission to look for it there instead
                elif [ -f "${SRC_DIR}" ]; then
                        echo $NOW "Creating hardlink to ${SEED_DIR}/${TR_TORRENT_NAME}" >> $LOG_FILE
                        ln -f "${SRC_DIR}" "${SEED_DIR}/${TR_TORRENT_NAME}"
                        echo $NOW "Having Transmission find $TR_TORRENT_NAME in $SEED_DIR" >> $LOG_FILE
                        $TR_CMD --find "${SEED_DIR}"
                fi

        ## Movie specific commands
        elif [[ "${SRC_DIR}" =~ "${MOVIE_DIR}" ]]; then
                echo its a movie

        ## Not a TV show or movie
        else
                echo "its not a tv or movie. dont touch it."
        fi

        # To Do
        # go through showrss and change feed
        # Do any tv shows actually come with Samples and subs?  How to deal?

        echo $NOW "Completed post-processing of $TR_TORRENT_NAME" >> $LOG_FILE

} &