[PLT-6707] /header [text] slash command: Edit the channel header (#6566)

* add /header slash command

* update websocket

* updater per review

webapp/actions/global_actions.jsx

@@ -212,6 +212,14 @@ export function showDeletePostModal(post, commentCount = 0) {
     });
 }
 
+export function showChannelHeaderUpdateModal(channel) {
+    AppDispatcher.handleViewAction({
+        type: ActionTypes.TOGGLE_CHANNEL_HEADER_UPDATE_MODAL,
+        value: true,
+        channel
+    });
+}
+
 export function showGetPostLinkModal(post) {
     AppDispatcher.handleViewAction({
         type: ActionTypes.TOGGLE_GET_POST_LINK_MODAL,

webapp/actions/websocket_actions.jsx

@@ -229,6 +229,11 @@ function handleEvent(msg) {
     }
 }
 
+function handleChannelUpdatedEvent(msg) {
+    const channel = JSON.parse(msg.data.channel);
+    dispatch({type: ChannelTypes.RECEIVED_CHANNEL, data: channel});
+}
+
 function handleNewPostEvent(msg) {
     const post = JSON.parse(msg.data.post);
     handleNewPost(post, msg);
@@ -341,11 +346,6 @@ function handleUserRemovedEvent(msg) {
     }
 }
 
-function handleChannelUpdatedEvent(msg) {
-    const channel = JSON.parse(msg.data.channel);
-    dispatch({type: ChannelTypes.RECEIVED_CHANNEL, data: channel});
-}
-
 function handleUserUpdatedEvent(msg) {
     const user = msg.data.user;
     if (UserStore.getCurrentId() !== user.id) {

webapp/components/create_post.jsx

@@ -76,14 +76,15 @@ export default class CreatePost extends React.Component {
 
         PostStore.clearDraftUploads();
 
-        const channelId = ChannelStore.getCurrentId();
-        const draft = PostStore.getDraft(channelId);
-
+        const channel = ChannelStore.getCurrent();
+        const channelId = channel.id;
+        const draft = PostStore.getPostDraft(channelId);
         const stats = ChannelStore.getCurrentStats();
         const members = stats.member_count - 1;
 
         this.state = {
             channelId,
+            channel,
             message: draft.message,
             uploadsInProgress: draft.uploadsInProgress,
             fileInfos: draft.fileInfos,
@@ -213,12 +214,20 @@ export default class CreatePost extends React.Component {
     handleSubmit(e) {
         const stats = ChannelStore.getCurrentStats();
         const members = stats.member_count - 1;
+        const updateChannel = ChannelStore.getCurrent();
 
         if ((this.state.message.includes('@all') || this.state.message.includes('@channel')) && members >= Constants.NOTIFY_ALL_MEMBERS) {
             this.setState({totalMembers: members});
             this.showNotifyAllModal();
             return;
         }
+
+        if (this.state.message.endsWith('/header ')) {
+            GlobalActions.showChannelHeaderUpdateModal(updateChannel);
+            this.setState({message: ''});
+            return;
+        }
+
         this.doSubmit(e);
     }
 

webapp/components/navbar.jsx

@@ -55,6 +55,7 @@ export default class Navbar extends React.Component {
         this.showSearch = this.showSearch.bind(this);
 
         this.showEditChannelHeaderModal = this.showEditChannelHeaderModal.bind(this);
+        this.hideEditChannelHeaderModal = this.hideEditChannelHeaderModal.bind(this);
         this.showRenameChannelModal = this.showRenameChannelModal.bind(this);
         this.hideRenameChannelModal = this.hideRenameChannelModal.bind(this);
         this.isStateValid = this.isStateValid.bind(this);
@@ -110,6 +111,7 @@ export default class Navbar extends React.Component {
         UserStore.addChangeListener(this.onChange);
         PreferenceStore.addChangeListener(this.onChange);
         ModalStore.addModalListener(ActionTypes.TOGGLE_QUICK_SWITCH_MODAL, this.toggleQuickSwitchModal);
+        ModalStore.addModalListener(ActionTypes.TOGGLE_CHANNEL_HEADER_UPDATE_MODAL, this.showEditChannelHeaderModal);
         $('.inner-wrap').click(this.hideSidebars);
         document.addEventListener('keydown', this.handleQuickSwitchKeyPress);
     }
@@ -121,6 +123,7 @@ export default class Navbar extends React.Component {
         UserStore.removeChangeListener(this.onChange);
         PreferenceStore.removeChangeListener(this.onChange);
         ModalStore.removeModalListener(ActionTypes.TOGGLE_QUICK_SWITCH_MODAL, this.toggleQuickSwitchModal);
+        ModalStore.addModalListener(ActionTypes.TOGGLE_CHANNEL_HEADER_UPDATE_MODAL, this.hideEditChannelHeaderModal);
         document.removeEventListener('keydown', this.handleQuickSwitchKeyPress);
     }
 
@@ -193,6 +196,12 @@ export default class Navbar extends React.Component {
         });
     }
 
+    hideEditChannelHeaderModal() {
+        this.setState({
+            showEditChannelHeaderModal: false
+        });
+    }
+
     showRenameChannelModal(e) {
         e.preventDefault();
 

webapp/stores/modal_store.jsx

@@ -41,6 +41,7 @@ class ModalStoreClass extends EventEmitter {
         case ActionTypes.TOGGLE_GET_PUBLIC_LINK_MODAL:
         case ActionTypes.TOGGLE_DM_MODAL:
         case ActionTypes.TOGGLE_QUICK_SWITCH_MODAL:
+        case ActionTypes.TOGGLE_CHANNEL_HEADER_UPDATE_MODAL:
             this.emit(type, value, args);
             break;
         }

webapp/utils/constants.jsx

@@ -176,6 +176,7 @@ export const ActionTypes = keyMirror({
     TOGGLE_GET_PUBLIC_LINK_MODAL: null,
     TOGGLE_DM_MODAL: null,
     TOGGLE_QUICK_SWITCH_MODAL: null,
+    TOGGLE_CHANNEL_HEADER_UPDATE_MODAL: null,
 
     SUGGESTION_PRETEXT_CHANGED: null,
     SUGGESTION_RECEIVED_SUGGESTIONS: null,