How to extend desk_theme options in a custom app?

ERPNext
,
1

I have created a new theme called Modern Desk UI, Its now showing in the Switch Theme dialog, its work fine when switching the theme, but when i reload the page it set the default theme.

image

That because the Desk Theme is not contain the new theme option, i tried to add it be edit the User doctype, and it works, but i don’t want to edit it from the doctype it self, i want to extend it from my new app.

image

So, How to achieve that?

@NCP

frappe-bench/apps/theme/theme/public/js/theme_switcher.js

frappe.ui.ThemeSwitcher = class CustomThemeSwitcher extends frappe.ui.ThemeSwitcher {
 constructor() {
  super()
 }

 fetch_themes() {
  return new Promise((resolve) => {
   this.themes = [
    {
     name: "modern",
     label: "Modern Desk UI",
     info: "A modern desk UI theme"
    },
    {
     name: "light",
     label: ("Frappe Light"),
     info: ("Light Theme"),
    },
    {
     name: "dark",
     label: "Timeless Night",
     info: "Dark Theme",
    },
    {
     name: "automatic",
     label: "Automatic",
     info: "Uses system's theme to switch between light and dark mode",
    }
   ];

   resolve(this.themes);
  });
 }
}

frappe-bench/apps/theme/theme/hooks.py

override_whitelisted_methods = {
    "frappe.core.doctype.user.user.switch_theme": "theme.overrides.switch_theme.switch_theme"
}

frappe-bench/apps/theme/theme/overrides/switch_theme.py

import frappe

@frappe.whitelist()
def switch_theme(theme):
	if theme in ["Modern", "Dark", "Light", "Automatic"]:
		frappe.db.set_value("User", frappe.session.user, "desk_theme", theme)
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