Add pinned posts (#4217)

webapp/stores/post_store.jsx

@@ -16,6 +16,7 @@ const FOCUSED_POST_CHANGE = 'focused_post_change';
 const EDIT_POST_EVENT = 'edit_post';
 const POSTS_VIEW_JUMP_EVENT = 'post_list_jump';
 const SELECTED_POST_CHANGE_EVENT = 'selected_post_change';
+const POST_PINNED_CHANGE_EVENT = 'post_pinned_change';
 
 class PostStoreClass extends EventEmitter {
     constructor() {
@@ -259,22 +260,42 @@ class PostStoreClass extends EventEmitter {
         this.postsInfo[id].postList = combinedPosts;
     }
 
+    focusedPostListHasPost(id) {
+        const focusedPostId = this.getFocusedPostId();
+        if (focusedPostId == null) {
+            return false;
+        }
+
+        const focusedPostList = makePostListNonNull(this.getAllPosts(focusedPostId));
+        return focusedPostList.posts.hasOwnProperty(id);
+    }
+
     storePost(post, isNewPost = false) {
-        const postList = makePostListNonNull(this.getAllPosts(post.channel_id));
+        const ids = [
+            post.channel_id
+        ];
 
-        if (post.pending_post_id !== '') {
-            this.removePendingPost(post.channel_id, post.pending_post_id);
+        // update the post in the permalink view if it's there
+        if (!isNewPost && this.focusedPostListHasPost(post.id)) {
+            ids.push(this.getFocusedPostId());
         }
 
-        post.pending_post_id = '';
+        ids.forEach((id) => {
+            const postList = makePostListNonNull(this.getAllPosts(id));
+            if (post.pending_post_id !== '') {
+                this.removePendingPost(post.channel_id, post.pending_post_id);
+            }
 
-        postList.posts[post.id] = post;
-        if (isNewPost && postList.order.indexOf(post.id) === -1) {
-            postList.order.unshift(post.id);
-        }
+            post.pending_post_id = '';
 
-        this.makePostsInfo(post.channel_id);
-        this.postsInfo[post.channel_id].postList = postList;
+            postList.posts[post.id] = post;
+            if (isNewPost && postList.order.indexOf(post.id) === -1) {
+                postList.order.unshift(post.id);
+            }
+
+            this.makePostsInfo(post.channel_id);
+            this.postsInfo[id].postList = postList;
+        });
     }
 
     storeFocusedPost(postId, channelId, postList) {
@@ -500,6 +521,18 @@ class PostStoreClass extends EventEmitter {
         this.removeListener(SELECTED_POST_CHANGE_EVENT, callback);
     }
 
+    emitPostPinnedChange() {
+        this.emit(POST_PINNED_CHANGE_EVENT);
+    }
+
+    addPostPinnedChangeListener(callback) {
+        this.on(POST_PINNED_CHANGE_EVENT, callback);
+    }
+
+    removePostPinnedChangeListener(callback) {
+        this.removeListener(POST_PINNED_CHANGE_EVENT, callback);
+    }
+
     getCurrentUsersLatestPost(channelId, rootId) {
         const userId = UserStore.getCurrentId();
 
@@ -686,6 +719,10 @@ PostStore.dispatchToken = AppDispatcher.register((payload) => {
         PostStore.storeSelectedPostId(action.postId);
         PostStore.emitSelectedPostChange(action.from_search, action.from_flagged_posts);
         break;
+    case ActionTypes.RECEIVED_POST_PINNED:
+    case ActionTypes.RECEIVED_POST_UNPINNED:
+        PostStore.emitPostPinnedChange();
+        break;
     default:
     }
 });

webapp/stores/search_store.jsx

@@ -19,6 +19,7 @@ class SearchStoreClass extends EventEmitter {
         this.searchResults = null;
         this.isMentionSearch = false;
         this.isFlaggedPosts = false;
+        this.isPinnedPosts = false;
         this.isVisible = false;
         this.searchTerm = '';
     }
@@ -83,6 +84,10 @@ class SearchStoreClass extends EventEmitter {
         return this.isFlaggedPosts;
     }
 
+    getIsPinnedPosts() {
+        return this.isPinnedPosts;
+    }
+
     storeSearchTerm(term) {
         this.searchTerm = term;
     }
@@ -91,10 +96,11 @@ class SearchStoreClass extends EventEmitter {
         return this.searchTerm;
     }
 
-    storeSearchResults(results, isMentionSearch, isFlaggedPosts) {
+    storeSearchResults(results, isMentionSearch, isFlaggedPosts, isPinnedPosts) {
         this.searchResults = results;
         this.isMentionSearch = isMentionSearch;
         this.isFlaggedPosts = isFlaggedPosts;
+        this.isPinnedPosts = isPinnedPosts;
     }
 
     deletePost(post) {
@@ -120,7 +126,7 @@ SearchStore.dispatchToken = AppDispatcher.register((payload) => {
 
     switch (action.type) {
     case ActionTypes.RECEIVED_SEARCH:
-        SearchStore.storeSearchResults(action.results, action.is_mention_search, action.is_flagged_posts);
+        SearchStore.storeSearchResults(action.results, action.is_mention_search, action.is_flagged_posts, action.is_pinned_posts);
         SearchStore.emitSearchChange();
         break;
     case ActionTypes.RECEIVED_SEARCH_TERM: