Fix cannot create task for new user via [] method

src/libs/actions/Report.ts

@@ -3673,6 +3673,30 @@ function setGroupDraft(newGroupDraft: Partial<NewGroupChatDraft>) {
     Onyx.merge(ONYXKEYS.NEW_GROUP_CHAT_DRAFT, newGroupDraft);
 }
 
+function setTaskDataForNewAssingee(assigneeLogin: string, accountID: number | undefined = undefined) {
+    const assigneeAccountID = accountID ?? UserUtils.generateAccountID(assigneeLogin);
+    const report: OnyxEntry<Report> | undefined = ReportUtils.buildOptimisticChatReport([assigneeAccountID]);
+    report.isOptimisticReport = true;
+
+    // When assigning a task to a new user, by default we share the task in their DM
+    // However, the DM doesn't exist yet - and will be created optimistically once the task is created
+    // We don't want to show the new DM yet, because if you select an assignee and then change the assignee, the previous DM will still be shown
+    // So here, we create it optimistically to share it with the assignee, but we have to hide it until the task is created
+    if (report) {
+        report.isHidden = true;
+    }
+    Onyx.set(`${ONYXKEYS.COLLECTION.REPORT}${report.reportID}`, report);
+
+    const optimisticPersonalDetailsListAction = {
+        accountID: assigneeAccountID,
+        avatar: allPersonalDetails?.[assigneeAccountID]?.avatar ?? UserUtils.getDefaultAvatarURL(assigneeAccountID),
+        displayName: allPersonalDetails?.[assigneeAccountID]?.displayName ?? assigneeLogin,
+        login: assigneeLogin,
+    };
+    Onyx.merge(ONYXKEYS.PERSONAL_DETAILS_LIST, {[assigneeAccountID]: optimisticPersonalDetailsListAction});
+    return {assignee: optimisticPersonalDetailsListAction, assigneeReport: report};
+}
+
 export {
     searchInServer,
     addComment,
@@ -3753,5 +3777,6 @@ export {
     leaveGroupChat,
     removeFromGroupChat,
     updateGroupChatMemberRoles,
+    setTaskDataForNewAssingee,
     clearAvatarErrors,
 };

src/libs/actions/Task.ts

@@ -14,7 +14,6 @@ import * as PersonalDetailsUtils from '@libs/PersonalDetailsUtils';
 import * as ReportActionsUtils from '@libs/ReportActionsUtils';
 import * as ReportUtils from '@libs/ReportUtils';
 import playSound, {SOUNDS} from '@libs/Sound';
-import * as UserUtils from '@libs/UserUtils';
 import CONST from '@src/CONST';
 import ONYXKEYS from '@src/ONYXKEYS';
 import ROUTES from '@src/ROUTES';
@@ -670,26 +669,7 @@ function setAssigneeValue(
         }
         // If chat report is still not found we need to build new optimistic chat report
         if (!report) {
-            report = ReportUtils.buildOptimisticChatReport([assigneeAccountID]);
-            report.isOptimisticReport = true;
-
-            // When assigning a task to a new user, by default we share the task in their DM
-            // However, the DM doesn't exist yet - and will be created optimistically once the task is created
-            // We don't want to show the new DM yet, because if you select an assignee and then change the assignee, the previous DM will still be shown
-            // So here, we create it optimistically to share it with the assignee, but we have to hide it until the task is created
-            if (report) {
-                report.isHidden = true;
-            }
-            Onyx.set(`${ONYXKEYS.COLLECTION.REPORT}${report.reportID}`, report);
-
-            // If this is an optimistic report, we likely don't have their personal details yet so we set it here optimistically as well
-            const optimisticPersonalDetailsListAction = {
-                accountID: assigneeAccountID,
-                avatar: allPersonalDetails?.[assigneeAccountID]?.avatar ?? UserUtils.getDefaultAvatarURL(assigneeAccountID),
-                displayName: allPersonalDetails?.[assigneeAccountID]?.displayName ?? assigneeEmail,
-                login: assigneeEmail,
-            };
-            Onyx.merge(ONYXKEYS.PERSONAL_DETAILS_LIST, {[assigneeAccountID]: optimisticPersonalDetailsListAction});
+            report = Report.setTaskDataForNewAssingee(assigneeEmail, assigneeAccountID).assigneeReport;
         }
 
         // The optimistic field may not exist in the existing report and it can be overridden by the optimistic field of previous report data when merging the assignee chat report

src/pages/home/report/ReportFooter.tsx

@@ -110,10 +110,16 @@ function ReportFooter({
             const mentionWithDomain = ReportUtils.addDomainToShortMention(mention ?? '') ?? mention;
 
             let assignee: OnyxTypes.PersonalDetails | EmptyObject = {};
+            let assigneeChatReport;
             if (mentionWithDomain) {
                 assignee = Object.values(allPersonalDetails).find((value) => value?.login === mentionWithDomain) ?? {};
+                if (!Object.keys(assignee).length) {
+                    const optimisticDataForNewAssignee = Report.setTaskDataForNewAssingee(mentionWithDomain);
+                    assignee = optimisticDataForNewAssignee.assignee;
+                    assigneeChatReport = optimisticDataForNewAssignee.assigneeReport;
+                }
             }
-            Task.createTaskAndNavigate(report.reportID, title, '', assignee?.login ?? '', assignee.accountID, undefined, report.policyID);
+            Task.createTaskAndNavigate(report.reportID, title, '', assignee?.login ?? '', assignee.accountID, assigneeChatReport, report.policyID);
             return true;
         },
         [allPersonalDetails, report.policyID, report.reportID],