Fix join private channel (#30875)

* Fix join private channel not showing on all needed scenarios

* Fix for other two instances of the logic

* Fix test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/channel_layout/channel_identifier_router/actions.test.ts

@@ -179,9 +179,7 @@ describe('Actions', () => {
                         ...initialState.entities.users,
                         profiles: {
                             ...initialState.entities.users.profiles,
-                            current_user_id: {
-                                roles: 'system_admin',
-                            },
+                            current_user_id: {},
                         },
                     },
                 },
@@ -205,9 +203,7 @@ describe('Actions', () => {
                         ...initialState.entities.users,
                         profiles: {
                             ...initialState.entities.users.profiles,
-                            current_user_id: {
-                                roles: 'system_user',
-                            },
+                            current_user_id: {},
                         },
                     },
                     channels: {

webapp/channels/src/components/channel_layout/channel_identifier_router/actions.ts

@@ -10,9 +10,8 @@ import {joinChannel, getChannelByNameAndTeamName, getChannelMember, markGroupCha
 import {getUser, getUserByUsername, getUserByEmail} from 'mattermost-redux/actions/users';
 import {Client4} from 'mattermost-redux/client';
 import {getChannelByName, getOtherChannels, getChannel, getChannelsNameMapInTeam, getRedirectChannelNameForTeam} from 'mattermost-redux/selectors/entities/channels';
-import {getTeamByName, getMyTeamMember} from 'mattermost-redux/selectors/entities/teams';
-import {getCurrentUser, getCurrentUserId, getUserByUsername as selectUserByUsername, getUser as selectUser, getUserByEmail as selectUserByEmail} from 'mattermost-redux/selectors/entities/users';
-import * as UserUtils from 'mattermost-redux/utils/user_utils';
+import {getTeamByName} from 'mattermost-redux/selectors/entities/teams';
+import {getCurrentUserId, getUserByUsername as selectUserByUsername, getUser as selectUser, getUserByEmail as selectUserByEmail} from 'mattermost-redux/selectors/entities/users';
 
 import {openDirectChannelToUserId} from 'actions/channel_actions';
 import * as GlobalActions from 'actions/global_actions';
@@ -187,23 +186,13 @@ export function goToChannelByChannelName(match: Match, history: History): Action
 
         if (!channel || !member) {
             if (channel?.type === Constants.PRIVATE_CHANNEL) {
-                // Prompt system admins and team admins before joining the private channel
-                const user = getCurrentUser(getState());
-                const isSystemAdmin = UserUtils.isSystemAdmin(user?.roles);
-                let prompt = false;
-                if (isSystemAdmin) {
-                    prompt = true;
-                } else {
-                    const teamMember = getMyTeamMember(state, teamObj.id);
-                    prompt = Boolean(teamMember && teamMember.scheme_admin);
-                }
-                if (prompt) {
+                // If we are here, we have permissions to join the channel
+                // and the channel is private. Therefore prompt always.
                 const joinPromptResult = await dispatch(joinPrivateChannelPrompt(teamObj, channel.display_name));
                 if ('data' in joinPromptResult && !joinPromptResult.data!.join) {
                     return {data: undefined};
                 }
             }
-            }
 
             const joinChannelDispatchResult = await dispatch(joinChannel(getCurrentUserId(state), teamObj!.id, channel?.id || '', channelName));
             if ('error' in joinChannelDispatchResult) {

webapp/channels/src/components/permalink_view/actions.ts

@@ -10,10 +10,8 @@ import {getMissingProfilesByIds} from 'mattermost-redux/actions/users';
 import {Client4} from 'mattermost-redux/client';
 import {getCurrentChannel, getChannel as getChannelFromRedux} from 'mattermost-redux/selectors/entities/channels';
 import {isCollapsedThreadsEnabled} from 'mattermost-redux/selectors/entities/preferences';
-import {getCurrentTeam, getTeam, getMyTeamMember} from 'mattermost-redux/selectors/entities/teams';
-import {getCurrentUser} from 'mattermost-redux/selectors/entities/users';
+import {getCurrentTeam, getTeam} from 'mattermost-redux/selectors/entities/teams';
 import {getUserIdFromChannelName} from 'mattermost-redux/utils/channel_utils';
-import {isSystemAdmin} from 'mattermost-redux/utils/user_utils';
 
 import {loadChannelsForCurrentUser} from 'actions/channel_actions';
 import {loadNewDMIfNeeded, loadNewGMIfNeeded} from 'actions/user_actions';
@@ -109,18 +107,10 @@ export function focusPost(postId: string, returnTo = '', currentUserId: string,
         }
 
         if (!postInfo.has_joined_channel) {
-            // Prompt system admins and team admins before joining the private channel
-            const user = getCurrentUser(state);
-            let prompt = false;
             if (postInfo.channel_type === Constants.PRIVATE_CHANNEL) {
-                if (isSystemAdmin(user.roles)) {
-                    prompt = true;
-                } else {
-                    const teamMember = getMyTeamMember(state, currentTeam.id);
-                    prompt = Boolean(teamMember && teamMember.scheme_admin);
-                }
-            }
-            if (prompt) {
+                // Prompt system admins and team admins before joining the private channel.
+                // There is no need for permission check because if we received the info of
+                // the post means that we can join the channel.
                 privateChannelJoinPromptVisible = true;
                 const joinPromptResult = await dispatch(joinPrivateChannelPrompt(currentTeam, postInfo.channel_display_name));
                 privateChannelJoinPromptVisible = false;

webapp/channels/src/components/permalink_view/permalink_view.test.tsx

@@ -23,6 +23,7 @@ import TestHelper from 'packages/mattermost-redux/test/test_helper';
 import {mountWithIntl} from 'tests/helpers/intl-test-helper';
 import mockStore from 'tests/test_store';
 import {getHistory} from 'utils/browser_history';
+import {joinPrivateChannelPrompt} from 'utils/channel_utils';
 import {ErrorPageTypes} from 'utils/constants';
 
 jest.mock('actions/channel_actions', () => ({
@@ -543,13 +544,7 @@ describe('components/PermalinkView', () => {
                         },
                     };
 
-                    jest.mock('utils/channel_utils', () => ({
-                        joinPrivateChannelPrompt: jest.fn(() => {
-                            return async () => {
-                                return {data: {join: true}};
-                            };
-                        }),
-                    }));
+                    jest.mocked(joinPrivateChannelPrompt).mockReturnValueOnce(async () => ({data: {join: true}}));
 
                     const postId = 'privatepostid1';
                     nockInfoForPrivatePost(postId);

webapp/channels/src/utils/utils.tsx

@@ -1297,7 +1297,6 @@ export async function handleFormattedTextClick(e: React.MouseEvent, currentRelat
 
             let isReply = false;
 
-            if (isSystemAdmin(user.roles)) {
             if (match) {
                 // Get team by name
                 const {teamName} = match;
@@ -1360,7 +1359,6 @@ export async function handleFormattedTextClick(e: React.MouseEvent, currentRelat
                     }
                 }
             }
-            }
 
             e.stopPropagation();