Using transmission-remote-gtk, visit the file or folder in your organized library. If item is not (yet?) organized, visit the origin instead (i.e. the 'Downloads' folder).

xdg-open-organized-path.py

#!/usr/bin/env python3

# This script is supposed to be used with a remote torrent client,
# such as transmission-remote-gtk. Add this script as a local command
# and it will check if the file/dir has been sorted by filebot and if
# so, open the sorted file path. If not, open the path to the unsorted
# path (i.e. file/dir in 'Downloads' folder). It translates the path
# to correspond to the local mount point (samba share).To parse the
# xml file from filebot I use the untangle package because I'm lazy
# and because it's so easy to use. Install it with pip.

# pip install -U untangle

# I have also set up a passwordless authentication between my devices
# which suits this task well since I need to rsync the xml file from
# my remote server to my local computer.

# In transmission-remote-gtk I have set up the a local command:
# /path/to/this/script.py %{leftUntilDone} "%{full-path}" "%{name}"

# The script is very simple so it expects those arguments in that order.

import untangle
import os, sys, subprocess, tempfile

def translate_path(_):
    if not _: return _
    local_paths = {
        "/volumeUSB1/usbshare/"      : "/mnt/arkivet/usbshare1/",
        "/volumeUSB2/usbshare/"      :  "/mnt/arkivet/usbshare2",
        "/volume1/homes/snelhingst/" :      "/mnt/arkivet/home/"
    }
    for a, b in local_paths.items():
        _ = _.replace(a, b)
    return _

args = sys.argv[1:]

if len(args) == 0:
    msg = 'No arguments given'
    print(msg)
    sys.exit(1)

isComplete = int(args[0]) == 0
remoteFullPath = args[1]
localFullPath = translate_path(args[1])
baseName = args[2]

if isComplete is False:
    if os.path.isdir(localFullPath):
        subprocess.Popen(['xdg-open', '{}'.format(localFullPath)])
    if os.path.isfile(localFullPath):
        subprocess.Popen(['xdg-open', '{}'.format(os.path.dirname(localFullPath))])
    sys.exit(0)

with tempfile.NamedTemporaryFile('w', encoding='utf8') as tmpf:
    cmd = [
        '/usr/bin/rsync',
        '--rsync-path=/Apps/opt/bin/rsync',
        'arkivet:/usr/local/filebot/data/sc-transmission/history.xml',
        '{dest}'.format(dest=tmpf.name)
    ]
    subprocess.run(cmd)
    xml = untangle.parse(tmpf.name)

if os.path.isdir(localFullPath):
    for sequence in xml.history.sequence:
        for elem in sequence.rename:
            if elem.get_attribute('dir') == remoteFullPath:
                organizedLocalFullPath = translate_path(elem.get_attribute('to'))
                subprocess.Popen(['xdg-open', '{}'.format(os.path.dirname(organizedLocalFullPath))])
                sys.exit(0)
    subprocess.Popen(['xdg-open', '{}'.format(os.path.dirname(localFullPath))])
    sys.exit(0)

if os.path.isfile(localFullPath):
    for sequence in xml.history.sequence:
        for elem in sequence.rename:
            if elem.get_attribute('from') == baseName:
                organizedLocalFullPath = translate_path(elem.get_attribute('to'))
                subprocess.Popen(['xdg-open', '{}'.format(os.path.dirname(organizedLocalFullPath))])
                sys.exit(0)
    subprocess.Popen(['xdg-open', '{}'.format(os.path.dirname(localFullPath))])
    sys.exit(0)