1 files changed, 20 insertions, 3 deletions
diff --git a/web_src/js/modules/toast.js b/web_src/js/modules/toast.js
index d12d203718..627e24a1ff 100644
--- a/web_src/js/modules/toast.js
+++ b/web_src/js/modules/toast.js
@@ -1,5 +1,6 @@
 import {htmlEscape} from 'escape-goat';
 import {svg} from '../svg.js';
+import {animateOnce, showElem} from '../utils/dom.js';
 import Toastify from 'toastify-js'; // don't use "async import", because when network error occurs, the "async import" also fails and nothing is shown
 
 const levels = {
@@ -21,13 +22,28 @@ const levels = {
 };
 
 // See https://github.com/apvarun/toastify-js#api for options
-function showToast(message, level, {gravity, position, duration, useHtmlBody, ...other} = {}) {
+function showToast(message, level, {gravity, position, duration, useHtmlBody, preventDuplicates = true, ...other} = {}) {
+  const body = useHtmlBody ? String(message) : htmlEscape(message);
+  const key = `${level}-${body}`;
+
+  // prevent showing duplicate toasts with same level and message, and give a visual feedback for end users
+  if (preventDuplicates) {
+    const toastEl = document.querySelector(`.toastify[data-toast-unique-key="${CSS.escape(key)}"]`);
+    if (toastEl) {
+      const toastDupNumEl = toastEl.querySelector('.toast-duplicate-number');
+      showElem(toastDupNumEl);
+      toastDupNumEl.textContent = String(Number(toastDupNumEl.textContent) + 1);
+      animateOnce(toastDupNumEl, 'pulse-1p5-200');
+      return;
+    }
+  }
+
   const {icon, background, duration: levelDuration} = levels[level ?? 'info'];
   const toast = Toastify({
     text: `
       <div class='toast-icon'>${svg(icon)}</div>
-      <div class='toast-body'>${useHtmlBody ? message : htmlEscape(message)}</div>
-      <button class='toast-close'>${svg('octicon-x')}</button>
+      <div class='toast-body'><span class="toast-duplicate-number tw-hidden">1</span>${body}</div>
+      <button class='btn toast-close'>${svg('octicon-x')}</button>
     `,
     escapeMarkup: false,
     gravity: gravity ?? 'top',
@@ -39,6 +55,7 @@ function showToast(message, level, {gravity, position, duration, useHtmlBody, ..
 
   toast.showToast();
   toast.toastElement.querySelector('.toast-close').addEventListener('click', () => toast.hideToast());
+  toast.toastElement.setAttribute('data-toast-unique-key', key);
   return toast;
 }