refresh theme without reloading page

frontend/src/LogoContext.jsx

@@ -5,6 +5,7 @@ import DefaultLoginLogoLight from "./media/illustrations/login-logo.svg";
 import DefaultLoginLogoDark from "./media/illustrations/login-logo-light.svg";
 import System from "./models/system";
 
+export const REFETCH_LOGO_EVENT = "refetch-logo";
 export const LogoContext = createContext();
 
 export function LogoProvider({ children }) {
@@ -16,32 +17,36 @@ export function LogoProvider({ children }) {
       ? DefaultLoginLogoDark
       : DefaultLoginLogoLight;
 
-  useEffect(() => {
-    async function fetchInstanceLogo() {
-      try {
-        const { isCustomLogo, logoURL } = await System.fetchLogo();
-        if (logoURL) {
-          setLogo(logoURL);
-          setLoginLogo(isCustomLogo ? logoURL : DefaultLoginLogo);
-          setIsCustomLogo(isCustomLogo);
-        } else {
-          localStorage.getItem("theme") !== "default"
-            ? setLogo(AnythingLLMDark)
-            : setLogo(AnythingLLM);
-          setLoginLogo(DefaultLoginLogo);
-          setIsCustomLogo(false);
-        }
-      } catch (err) {
+  async function fetchInstanceLogo() {
+    try {
+      const { isCustomLogo, logoURL } = await System.fetchLogo();
+      if (logoURL) {
+        setLogo(logoURL);
+        setLoginLogo(isCustomLogo ? logoURL : DefaultLoginLogo);
+        setIsCustomLogo(isCustomLogo);
+      } else {
         localStorage.getItem("theme") !== "default"
           ? setLogo(AnythingLLMDark)
           : setLogo(AnythingLLM);
         setLoginLogo(DefaultLoginLogo);
         setIsCustomLogo(false);
-        console.error("Failed to fetch logo:", err);
       }
+    } catch (err) {
+      localStorage.getItem("theme") !== "default"
+        ? setLogo(AnythingLLMDark)
+        : setLogo(AnythingLLM);
+      setLoginLogo(DefaultLoginLogo);
+      setIsCustomLogo(false);
+      console.error("Failed to fetch logo:", err);
     }
+  }
 
+  useEffect(() => {
     fetchInstanceLogo();
+    window.addEventListener(REFETCH_LOGO_EVENT, fetchInstanceLogo);
+    return () => {
+      window.removeEventListener(REFETCH_LOGO_EVENT, fetchInstanceLogo);
+    };
   }, []);
 
   return (

frontend/src/hooks/useTheme.js

+import { REFETCH_LOGO_EVENT } from "@/LogoContext";
 import { useState, useEffect } from "react";
 
 const availableThemes = {
@@ -26,6 +27,7 @@ export function useTheme() {
     document.documentElement.setAttribute("data-theme", theme);
     document.body.classList.toggle("light", theme === "light");
     localStorage.setItem("theme", theme);
+    window.dispatchEvent(new Event(REFETCH_LOGO_EVENT));
   }, [theme]);
 
   // In development, attach keybind combinations to toggle theme
@@ -34,20 +36,21 @@ export function useTheme() {
     function toggleOnKeybind(e) {
       if (e.metaKey && e.key === ".") {
         e.preventDefault();
-        const newTheme = theme === "light" ? "default" : "light";
-        console.log("toggling theme to ", newTheme);
-        setTheme(newTheme);
+        setTheme((prev) => (prev === "light" ? "default" : "light"));
       }
     }
     document.addEventListener("keydown", toggleOnKeybind);
     return () => document.removeEventListener("keydown", toggleOnKeybind);
   }, []);
 
-  // Refresh on theme change
-  const setTheme = (newTheme) => {
+  /**
+   * Sets the theme of the application and runs any
+   * other necessary side effects
+   * @param {string} newTheme The new theme to set
+   */
+  function setTheme(newTheme) {
     _setTheme(newTheme);
-    window.location.reload();
-  };
+  }
 
   return { theme, setTheme, availableThemes };
 }