Fully freeze author token.

app/assets/javascripts/filtered_search/filtered_search_manager.js

@@ -338,9 +338,10 @@ class FilteredSearchManager {
     this.filteredSearchInput.value = '';
 
     const removeElements = [];
+    const customValidator = this.customRemovalValidator || function (t) { return true };
 
     [].forEach.call(this.tokensContainer.children, (t) => {
-      if (t.classList.contains('js-visual-token')) {
+      if (t.classList.contains('js-visual-token') && customValidator(t)) {
         removeElements.push(t);
       }
     });
@@ -419,8 +420,18 @@ class FilteredSearchManager {
     });
   }
 
+  getAllParams() {
+    let params = gl.utils.getUrlParamsArray();
+
+    if (this.modifyUrlParams) {
+      params = this.modifyUrlParams(params);
+    }
+
+    return params;
+  }
+
   loadSearchParamsFromURL() {
-    const params = gl.utils.getUrlParamsArray();
+    const params = this.getAllParams();
     const usernameParams = this.getUsernameParams();
     let hasFilteredSearch = false;
 
@@ -566,6 +577,7 @@ class FilteredSearchManager {
 
   getUsernameParams() {
     const usernamesById = {};
+
     try {
       const attribute = this.filteredSearchInput.getAttribute('data-username-params');
       JSON.parse(attribute).forEach((user) => {

app/assets/javascripts/service_desk_issues/filtered_search.js

@@ -3,10 +3,38 @@ export default class FilteredSearchServiceDesk extends gl.FilteredSearchManager
     super('service_desk');
 
     this.cantEdit = ['author'];
+    this.bindCustomCondition();
+  }
+
+  bindCustomCondition() {
+    this.customRemovalValidator = function(token) {
+      const originalValue = token.querySelector('.value-container').getAttribute('data-original-value');
+      return originalValue !== '@support-bot';
+    };
   }
 
   canEdit(tokenName) {
     return this.cantEdit.indexOf(tokenName) === -1;
   }
+
+  modifyUrlParams(paramsArray) {
+    const support_bot_param = 'author_username=support-bot';
+    let replaced = false;
+
+    const modified = paramsArray.map((param) => {
+      const author_index = param.indexOf('author_username');
+      if (author_index !== -1) {
+        replaced = true;
+        return support_bot_param;
+      }
+      return param;
+    });
+
+    if (!replaced) {
+      modified.push(support_bot_param);
+    }
+
+    return modified;
+  }
 }