Custom list template option for standalone server

src/calibre/srv/TODO.rst

@@ -23,8 +23,6 @@ New features for the server generally
 - Add a way to search the set of locally available books stored in offline
   storage.
 
-- Add more book list visualizations and/or a customizable visualization
-
 - Automatic Let's Encrypt integration so that using HTTPS is easier
   Should wait for the acme v2 protocol endpoint:
   https://letsencrypt.org/2017/06/14/acme-v2-api.html

src/calibre/srv/standalone.py

@@ -3,20 +3,20 @@
 # License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 from __future__ import absolute_import, division, print_function, unicode_literals
 
+import json
 import os
 import signal
 import sys
 
 from calibre import as_unicode
-from calibre.constants import (
-    is_running_from_develop, isosx, iswindows, plugins)
+from calibre.constants import is_running_from_develop, isosx, iswindows, plugins
 from calibre.db.legacy import LibraryDatabase
 from calibre.srv.bonjour import BonJour
 from calibre.srv.handler import Handler
 from calibre.srv.http_response import create_http_handler
 from calibre.srv.library_broker import load_gui_libraries
-from calibre.srv.manage_users_cli import manage_users_cli
 from calibre.srv.loop import ServerLoop
+from calibre.srv.manage_users_cli import manage_users_cli
 from calibre.srv.opts import opts_to_parser
 from calibre.srv.utils import RotatingLog
 from calibre.utils.config import prefs
@@ -64,6 +64,9 @@ class Server(object):
         if opts.access_log:
             access_log = RotatingLog(opts.access_log, max_size=log_size)
         self.handler = Handler(libraries, opts)
+        if opts.custom_list_template:
+            with lopen(opts.custom_list_template, 'rb') as f:
+                self.handler.router.ctx.custom_list_template = json.load(f)
         plugins = []
         if opts.use_bonjour:
             plugins.append(BonJour())
@@ -105,6 +108,13 @@ libraries that the main calibre program knows about will be used.
             'Path to the access log file. This log contains information'
             ' about clients connecting to the server and making requests. By'
             ' default no access logging is done.'))
+    parser.add_option(
+        '--custom-list-template', help=_(
+            'Path to a JSON file containing a template for the custom book list mode.'
+            ' The easiest way to create such a template file is to go to Preferences->'
+            ' Sharing over the net-> Book list template in calibre, create the'
+            ' template and export it.'
+    ))
     if not iswindows and not isosx:
         # Does not work on macOS because if we fork() we cannot connect to Core
         # Serives which is needed by the QApplication() constructor, which in