Add metadata change code

cps/admin.py

@@ -47,7 +47,7 @@ from . import constants, logger, helper, services, cli_param
 from . import db, calibre_db, ub, web_server, config, updater_thread, gdriveutils, \
     kobo_sync_status, schedule
 from .helper import check_valid_domain, send_test_mail, reset_password, generate_password_hash, check_email, \
-    valid_email, check_username
+    valid_email, check_username, get_calibre_binarypath
 from .gdriveutils import is_gdrive_ready, gdrive_support
 from .render_template import render_title_template, get_sidebar_config
 from .services.worker import WorkerThread
@@ -1761,8 +1761,14 @@ def _configuration_update_helper():
             constants.EXTENSIONS_UPLOAD = config.config_upload_formats.split(',')
 
         _config_string(to_save, "config_calibre")
-        _config_string(to_save, "config_converterpath")
+        _config_string(to_save, "config_binariesdir")
         _config_string(to_save, "config_kepubifypath")
+        if "config_binariesdir" in to_save:
+            calibre_status = helper.check_calibre(config.config_binariesdir)
+            if calibre_status:
+                return _configuration_result(calibre_status)
+            to_save["config_converterpath"] = get_calibre_binarypath("ebook-convert")
+            _config_string(to_save, "config_converterpath")
 
         reboot_required |= _config_int(to_save, "config_login_type")