Transmission download complete shell script for moving complete files and removing its torrent entry

transmission_torrent_done.sh

#!/bin/bash
#
# 2017. 08. 31 Written by Awesometic
# 2017. 09. 25 Updated
# 2018. 01. 17 Updated
#   Split log file when the file size is bigger than 100 KB
#   Remove unimportant comments
#   Clean up the descriptions
#   Clean up the codes
#   Add datetime for each log
#   Add a guide for applying this script
# 2018. 10. 08 Updated
#   Add double quotes to prevent splitting words
# 
# Check before use this script:
# A. Add debian-transmission into sudores file to grant sudo permission without password.
#   - Follow a guide below.
#   1. $ sudo visudo
#   2. $ sudo usermod -a -G sudo debian-transmission
#   3. Paste it at the end of the file: debian-transmission ALL=(ALL:ALL) NOPASSWD:ALL
#   4. Save and quit.
# B. Change written paths to yours.
# C. Make sure that debian-transmission has proper permission for working directories.
# D. Make sure that giving "execute" permission to this script and debian-transmission can execute this.
# E. Enable using "done script" and type absolute path of this script, and restart transmission-daemon service.
#
# Plz feel free to give any suggestions and feedbacks.
#   - http://awesometic.tistory.com
#   - https://gist.github.com/awesometic/253b740d45f8e5f95b56ec24f33a9444
# Enjoy.

DATETIME=$(date '+%Y-%m-%d %H:%M:%S')

# User define constants
SERVER="9091 --auth awesometic:password"
OWNER_UID=awesometic
OWNER_GID=nas
TORRENT_DIR="/media/nas/torrent"
DEST_DIR="/media/nas/TV"
LOG_FILE_NAME="auto_move.log"

# Array that has managed file names
# Type your watching program's name wrapping with double quotation.
# It is case sensitive, so I recommend you refer to torrent's file name in advance,
# before type the program's name.
#
# For example, when you'd like to write in "Walking Dead",
# but the real downloaded file name contains "walkingdead",
# the name you wrote "Walking Dead" is ignored
# and writing in "walkingdead" is right.
#
# So, please be careful when you write.
MANAGED=( "라디오스타" "해피 투게더" "나 혼자 산다" "무한도전" "아는 형님" "어서와 한국은 처음이지" "미운 우리 새끼" )

# DO IT
LOG_FILE_PATH="$TORRENT_DIR"/"$LOG_FILE_NAME"
if [ -f "$LOG_FILE_PATH" ] && [ "$(stat -c%s $LOG_FILE_PATH)" -gt 100000 ]; then
    LOG_FILE_COUNT=$(find "$TORRENT_DIR" -maxdepth 1 -name "$LOG_FILE_NAME*" | wc -l)
    sudo mv "$LOG_FILE_PATH" "$LOG_FILE_PATH"."$LOG_FILE_COUNT"
fi

if ! [ -f "$LOG_FILE_PATH" ]; then
    sudo touch "$LOG_FILE_PATH"
    sudo chmod 664 "$LOG_FILE_PATH"
    sudo chown "$OWNER_UID":"$OWNER_GID" "$LOG_FILE_PATH"
fi

echo "[""$DATETIME""] Begin: ""$TR_TORRENT_ID":"$TR_TORRENT_NAME" >> "$LOG_FILE_PATH"
transmission-remote "$SERVER" --list >> "$LOG_FILE_PATH"

for NAME in "${MANAGED[@]}"; do
    if [[ "$TR_TORRENT_NAME" == *"$NAME"* ]]; then
        MOVEDIR="$DEST_DIR"/"$NAME"

        if ! [ -d "$MOVEDIR" ]; then 
            echo "[""$DATETIME""] Create a new directory: ""$MOVEDIR" >> "$LOG_FILE_PATH"
            sudo mkdir -p "$MOVEDIR"
        fi

        if ! [ -w "$MOVEDIR" ]; then
            echo "[""$DATETIME""] Change ownership temporary to move file" >> "$LOG_FILE_PATH"
            sudo chown debian-transmission:nogroup "$MOVEDIR"
        fi

        echo "[""$DATETIME""] Move managed file: ""$MOVEDIR"/"$TR_TORRENT_NAME" >> "$LOG_FILE_PATH"
        transmission-remote "$SERVER" --torrent "$TR_TORRENT_ID" --move "$MOVEDIR" >> "$LOG_FILE_PATH"

        echo "[""$DATETIME""] Change/Recover ownership and permission" >> "$LOG_FILE_PATH"
        sudo chmod -R 755 "$MOVEDIR"
        sudo chown -R "$OWNER_UID":"$OWNER_GID" "$MOVEDIR"

        break
    fi
done

echo "[""$DATETIME""] Remove completed torrent" >> "$LOG_FILE_PATH"
transmission-remote "$SERVER" --torrent "$TR_TORRENT_ID" --remove >> "$LOG_FILE_PATH"

echo "[""$DATETIME""] Finish" >> "$LOG_FILE_PATH"