Add recent_private_conversations key to /register.

src/__tests__/lib/exampleData.js

@@ -147,7 +147,7 @@ export const stream: Stream = makeStream({
   description: 'An example stream.',
 });
 
-const displayRecipientFromUser = (user: User): PmRecipientUser => {
+export const displayRecipientFromUser = (user: User): PmRecipientUser => {
   const { email, full_name, user_id: id } = user;
   return deepFreeze({
     email,
@@ -337,6 +337,7 @@ export const action = deepFreeze({
       realm_users: [],
       user_id: 4,
       realm_user_groups: [],
+      recent_private_conversations: [],
       streams: [],
       never_subscribed: [],
       subscriptions: [],

src/api/initialDataTypes.js

@@ -4,6 +4,7 @@ import type {
   CrossRealmBot,
   RealmEmojiById,
   RealmFilter,
+  RecentPrivateConversation,
   Stream,
   Subscription,
   User,
@@ -107,6 +108,10 @@ export type InitialDataRealmUserGroups = {|
   realm_user_groups: UserGroup[],
 |};
 
+export type InitialDataRecentPmConversations = {|
+  recent_private_conversations: RecentPrivateConversation[],
+|};
+
 type NeverSubscribedStream = {|
   description: string,
   invite_only: boolean,
@@ -273,6 +278,7 @@ export type InitialData = {|
   ...InitialDataRealmFilters,
   ...InitialDataRealmUser,
   ...InitialDataRealmUserGroups,
+  ...InitialDataRecentPmConversations,
   ...InitialDataStream,
   ...InitialDataSubscription,
   ...InitialDataUpdateDisplaySettings,

src/api/modelTypes.js

@@ -536,3 +536,26 @@ export type Message = $ReadOnly<{
   subject: string,
   subject_links: $ReadOnlyArray<string>,
 }>;
+
+//
+//
+//
+// ===================================================================
+// Summaries of messages and conversations.
+//
+//
+
+/**
+ * Describes a recent PM conversation.
+ *
+ * See https://github.com/zulip/zulip/commit/4c3c669b4#diff-2c2aa234cb4a0120fa5f2eeaf8a94fa2R283
+ * for the structure of this type and the meaning of its properties.
+ *
+ * `user_ids` does not contain the `user_id` of the current user. Consequently,
+ * a user's conversation with themselves will return [], which is unlike the
+ * behaviour found in other parts of codebase.
+ */
+export type RecentPrivateConversation = {|
+  max_message_id: number,
+  user_ids: number[],
+|};

src/boot/reducers.js

@@ -21,6 +21,7 @@ import nav from '../nav/navReducer';
 import outbox from '../outbox/outboxReducer';
 import presence from '../presence/presenceReducer';
 import realm from '../realm/realmReducer';
+import recentPrivateConversations from '../pm-conversations/recentPmConversationsReducer';
 import session from '../session/sessionReducer';
 import settings from '../settings/settingsReducer';
 import streams from '../streams/streamsReducer';
@@ -50,6 +51,7 @@ const reducers = {
   outbox,
   presence,
   realm,
+  recentPrivateConversations,
   session,
   settings,
   streams,

src/boot/store.js

@@ -44,9 +44,9 @@ export const storeKeys: Array<$Keys<GlobalState>> = [
  * don't have to re-download it.
  */
 // prettier-ignore
-export const cacheKeys: Array<$Keys<GlobalState>> = [
-  'flags', 'messages', 'mute', 'narrows', 'realm', 'streams',
-  'subscriptions', 'unread', 'userGroups', 'users',
+export const cacheKeys = [
+  'flags', 'messages', 'mute', 'narrows', 'realm', 'recentPrivateConversations',
+  'streams', 'subscriptions', 'unread', 'userGroups', 'users',
 ];
 
 /**

src/config.js

@@ -32,6 +32,7 @@ const config: Config = {
     'realm_filters',
     'realm_user',
     'realm_user_groups',
+    'recent_private_conversations',
     'stream',
     'subscription',
     'update_display_settings',

src/directSelectors.js

@@ -23,6 +23,7 @@ import type {
   Subscription,
   Stream,
   Outbox,
+  RecentPrivateConversation,
   User,
   UserGroup,
   UserStatusState,
@@ -83,6 +84,9 @@ export const getSubscriptions = (state: GlobalState): Subscription[] => state.su
  */
 export const getStreams = (state: GlobalState): Stream[] => state.streams;
 
+export const getRecentPrivateConversations = (state: GlobalState): RecentPrivateConversation[] =>
+  state.recentPrivateConversations;
+
 export const getPresence = (state: GlobalState): PresenceState => state.presence;
 
 export const getOutbox = (state: GlobalState): Outbox[] => state.outbox;