feat(core): add flag for two-step journal conformation (#13246)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced a feature flag to control a two-step journal confirmation
process.
* Users may now experience either an immediate journal opening or a
confirmation step before journal creation, depending on the feature flag
status.

* **Chores**
* Added a new feature flag for two-step journal confirmation,
configurable in canary builds.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/blocksuite/block-suite-header/journal/date-picker.tsx

@@ -1,5 +1,6 @@
 import type { WeekDatePickerHandle } from '@affine/component';
 import { WeekDatePicker } from '@affine/component';
+import { FeatureFlagService } from '@affine/core/modules/feature-flag';
 import {
   JOURNAL_DATE_FORMAT,
   JournalService,
@@ -25,6 +26,11 @@ export const JournalWeekDatePicker = ({ page }: JournalWeekDatePickerProps) => {
   );
   const workbench = useService(WorkbenchService).workbench;
 
+  const featureFlagService = useService(FeatureFlagService);
+  const isTwoStepJournalConfirmationEnabled = useLiveData(
+    featureFlagService.flags.enable_two_step_journal_confirmation.$
+  );
+
   useEffect(() => {
     if (!journalDate) return;
     setDate(journalDate.format(JOURNAL_DATE_FORMAT));
@@ -33,14 +39,19 @@ export const JournalWeekDatePicker = ({ page }: JournalWeekDatePickerProps) => {
 
   const openJournal = useCallback(
     (date: string) => {
-      const docs = journalService.journalsByDate$(date).value;
-      if (docs.length > 0) {
-        workbench.openDoc(docs[0].id, { at: 'active' });
+      if (isTwoStepJournalConfirmationEnabled) {
+        const docs = journalService.journalsByDate$(date).value;
+        if (docs.length > 0) {
+          workbench.openDoc(docs[0].id, { at: 'active' });
+        } else {
+          workbench.open(`/journals?date=${date}`, { at: 'active' });
+        }
       } else {
-        workbench.open(`/journals?date=${date}`, { at: 'active' });
+        const doc = journalService.ensureJournalByDate(date);
+        workbench.openDoc(doc.id, { at: 'active' });
       }
     },
-    [journalService, workbench]
+    [isTwoStepJournalConfirmationEnabled, journalService, workbench]
   );
 
   return (

packages/frontend/core/src/desktop/pages/workspace/detail-page/tabs/journal/index.tsx

@@ -16,6 +16,7 @@ import {
   DocsService,
 } from '@affine/core/modules/doc';
 import { DocDisplayMetaService } from '@affine/core/modules/doc-display-meta';
+import { FeatureFlagService } from '@affine/core/modules/feature-flag';
 import { JournalService } from '@affine/core/modules/journal';
 import {
   WorkbenchLink,
@@ -113,16 +114,26 @@ export const EditorJournalPanel = () => {
   const journalDate = journalDateStr ? dayjs(journalDateStr) : null;
   const isJournal = !!journalDate;
 
+  const featureFlagService = useService(FeatureFlagService);
+  const isTwoStepJournalConfirmationEnabled = useLiveData(
+    featureFlagService.flags.enable_two_step_journal_confirmation.$
+  );
+
   const openJournal = useCallback(
     (date: string) => {
-      const docs = journalService.journalsByDate$(date).value;
-      if (docs.length > 0) {
-        workbench.openDoc(docs[0].id, { at: 'active' });
+      if (isTwoStepJournalConfirmationEnabled) {
+        const docs = journalService.journalsByDate$(date).value;
+        if (docs.length > 0) {
+          workbench.openDoc(docs[0].id, { at: 'active' });
+        } else {
+          workbench.open(`/journals?date=${date}`, { at: 'active' });
+        }
       } else {
-        workbench.open(`/journals?date=${date}`, { at: 'active' });
+        const doc = journalService.ensureJournalByDate(date);
+        workbench.openDoc(doc.id, { at: 'active' });
       }
     },
-    [journalService, workbench]
+    [isTwoStepJournalConfirmationEnabled, journalService, workbench]
   );
 
   const onDateSelect = useCallback(

packages/frontend/core/src/desktop/pages/workspace/journals/index.tsx

@@ -4,6 +4,7 @@ import {
   type WeekDatePickerHandle,
 } from '@affine/component';
 import { BlocksuiteEditorJournalDocTitleUI } from '@affine/core/blocksuite/block-suite-editor/journal-doc-title';
+import { FeatureFlagService } from '@affine/core/modules/feature-flag';
 import {
   JOURNAL_DATE_FORMAT,
   JournalService,
@@ -21,7 +22,13 @@ import { TodayIcon } from '@blocksuite/icons/rc';
 import { useLiveData, useService } from '@toeverything/infra';
 import dayjs from 'dayjs';
 import type { Location } from 'history';
-import { useCallback, useLayoutEffect, useRef, useState } from 'react';
+import {
+  useCallback,
+  useEffect,
+  useLayoutEffect,
+  useRef,
+  useState,
+} from 'react';
 
 import { AllDocSidebarTabs } from '../layouts/all-doc-sidebar-tabs';
 import * as styles from './index.css';
@@ -36,7 +43,7 @@ function getDateFromUrl(location: Location) {
 
 const weekStyle = { maxWidth: 800, width: '100%' };
 // this route page acts as a redirector to today's journal
-export const Component = () => {
+export const JournalsPageWithConfirmation = () => {
   const handleRef = useRef<WeekDatePickerHandle>(null);
 
   const t = useI18n();
@@ -139,3 +146,32 @@ export const Component = () => {
     </>
   );
 };
+
+export const JournalsPageWithoutConfirmation = () => {
+  const journalService = useService(JournalService);
+  const workbench = useService(WorkbenchService).workbench;
+
+  useEffect(() => {
+    const today = dayjs().format(JOURNAL_DATE_FORMAT);
+    const doc = journalService.ensureJournalByDate(today);
+    workbench.openDoc(doc.id, {
+      replaceHistory: true,
+      at: 'active',
+    });
+  }, [journalService, workbench]);
+
+  return null;
+};
+
+export const Component = () => {
+  const featureFlagService = useService(FeatureFlagService);
+  const isTwoStepJournalConfirmationEnabled = useLiveData(
+    featureFlagService.flags.enable_two_step_journal_confirmation.$
+  );
+
+  if (isTwoStepJournalConfirmationEnabled) {
+    return <JournalsPageWithConfirmation />;
+  }
+
+  return <JournalsPageWithoutConfirmation />;
+};

packages/frontend/core/src/modules/feature-flag/constant.ts

@@ -264,6 +264,14 @@ export const AFFINE_FLAGS = {
     configurable: isCanaryBuild,
     defaultState: false,
   },
+  enable_two_step_journal_confirmation: {
+    category: 'affine',
+    displayName: 'Enable Two Step Journal Confirmation',
+    description:
+      'When enabled, you must confirm the journal before you can create a new journal.',
+    configurable: isCanaryBuild,
+    defaultState: isCanaryBuild,
+  },
 } satisfies { [key in string]: FlagInfo };
 
 // oxlint-disable-next-line no-redeclare