Support for announcement-only groups

ts/state/ducks/conversations.ts

@@ -121,6 +121,8 @@ export type ConversationType = {
   accessControlAddFromInviteLink?: number;
   accessControlAttributes?: number;
   accessControlMembers?: number;
+  announcementsOnly?: boolean;
+  announcementsOnlyReady?: boolean;
   expireTimer?: number;
   memberships?: Array<{
     conversationId: string;

ts/state/selectors/conversations.ts

@@ -26,6 +26,7 @@ import { isConversationUnregistered } from '../../util/isConversationUnregistere
 import { filterAndSortConversationsByTitle } from '../../util/filterAndSortConversations';
 import { ContactNameColors, ContactNameColorType } from '../../types/Colors';
 import { isInSystemContacts } from '../../util/isInSystemContacts';
+import { isGroupV2 } from '../../util/whatTypeOfConversation';
 
 import {
   getIntl,
@@ -894,3 +895,32 @@ export function isMissingRequiredProfileSharing(
       conversation.messageCount > 0
   );
 }
+
+export const getGroupAdminsSelector = createSelector(
+  getConversationSelector,
+  (conversationSelector: GetConversationByIdType) => {
+    return (conversationId: string): Array<ConversationType> => {
+      const { groupId, groupVersion, memberships = [] } = conversationSelector(
+        conversationId
+      );
+
+      if (
+        !isGroupV2({
+          groupId,
+          groupVersion,
+        })
+      ) {
+        return [];
+      }
+
+      const admins: Array<ConversationType> = [];
+      memberships.forEach(membership => {
+        if (membership.isAdmin) {
+          const admin = conversationSelector(membership.conversationId);
+          admins.push(admin);
+        }
+      });
+      return admins;
+    };
+  }
+);

ts/state/selectors/message.ts

@@ -1133,6 +1133,11 @@ export function canReply(
     return false;
   }
 
+  // Groups where only admins can send messages
+  if (conversation.announcementsOnly && !conversation.areWeAdmin) {
+    return false;
+  }
+
   // We can reply if this is outgoing and sent to at least one recipient
   if (isOutgoing(message)) {
     return (

ts/state/smart/CompositionArea.tsx

@@ -12,6 +12,7 @@ import { selectRecentEmojis } from '../selectors/emojis';
 import { getIntl, getUserConversationId } from '../selectors/user';
 import {
   getConversationSelector,
+  getGroupAdminsSelector,
   isMissingRequiredProfileSharing,
 } from '../selectors/conversations';
 import { getPropsForQuote } from '../selectors/message';
@@ -38,7 +39,12 @@ const mapStateToProps = (state: StateType, props: ExternalProps) => {
     throw new Error(`Conversation id ${id} not found!`);
   }
 
-  const { draftText, draftBodyRanges } = conversation;
+  const {
+    announcementsOnly,
+    areWeAdmin,
+    draftText,
+    draftBodyRanges,
+  } = conversation;
 
   const receivedPacks = getReceivedStickerPacks(state);
   const installedPacks = getInstalledStickerPacks(state);
@@ -109,6 +115,10 @@ const mapStateToProps = (state: StateType, props: ExternalProps) => {
     isMissingMandatoryProfileSharing: isMissingRequiredProfileSharing(
       conversation
     ),
+    // Groups
+    announcementsOnly,
+    areWeAdmin,
+    groupAdmins: getGroupAdminsSelector(state)(conversation.id),
   };
 };
 

ts/state/smart/ConversationHeader.tsx

@@ -93,10 +93,13 @@ const mapStateToProps = (state: StateType, ownProps: OwnProps) => {
   return {
     ...pick(conversation, [
       'acceptedMessageRequest',
+      'announcementsOnly',
+      'areWeAdmin',
       'avatarPath',
       'canChangeTimer',
       'color',
       'expireTimer',
+      'groupVersion',
       'isArchived',
       'isMe',
       'isPinned',
@@ -107,10 +110,9 @@ const mapStateToProps = (state: StateType, ownProps: OwnProps) => {
       'name',
       'phoneNumber',
       'profileName',
+      'sharedGroupNames',
       'title',
       'type',
-      'groupVersion',
-      'sharedGroupNames',
       'unblurredAvatarPath',
     ]),
     conversationTitle: state.conversations.selectedConversationTitle,

ts/state/smart/GroupV2Permissions.tsx

@@ -15,6 +15,7 @@ export type SmartGroupV2PermissionsProps = {
   conversationId: string;
   setAccessControlAttributesSetting: (value: number) => void;
   setAccessControlMembersSetting: (value: number) => void;
+  setAnnouncementsOnly: (value: boolean) => void;
 };
 
 const mapStateToProps = (