PLT-1378 Initial version of emoji reactions (#4520)

* Refactored emoji.json to support multiple aliases and emoji categories

* Added custom category to emoji.jsx and stabilized all fields

* Removed conflicting aliases for :mattermost: and :ca:

* fixup after store changes

* Added emoji reactions

* Removed reactions for an emoji when that emoji is deleted

* Fixed incorrect test case

* Renamed ReactionList to ReactionListView

* Fixed :+1: and :-1: not showing up as possible reactions

* Removed text emoticons from emoji reaction autocomplete

* Changed emoji reactions to be sorted by the order that they were first created

* Set a maximum number of listeners for the ReactionStore

* Removed unused code from Textbox component

* Fixed reaction permissions

* Changed error code when trying to modify reactions for another user

* Fixed merge conflicts

* Properly applied theme colours to reactions

* Fixed ESLint and gofmt errors

* Fixed ReactionListContainer to properly update when its post prop changes

* Removed unnecessary escape characters from reaction regexes

* Shared reaction message pattern between CreatePost and CreateComment

* Removed an unnecessary select query when saving a reaction

* Changed reactions route to be under /reactions

* Fixed copyright dates on newly added files

* Removed debug code that prevented all unit tests from being ran

* Cleaned up unnecessary code for reactions

* Renamed ReactionStore.List to ReactionStore.GetForPost

1 files changed, 18 insertions, 3 deletions

diff --git a/webapp/stores/post_store.jsx b/webapp/stores/post_store.jsx
index fbe5cd457..5e8155c40 100644
--- a/webapp/stores/post_store.jsx
+++ b/webapp/stores/post_store.jsx
@@ -118,7 +118,15 @@ class PostStoreClass extends EventEmitter {
 
     getEarliestPost(id) {
         if (this.postsInfo.hasOwnProperty(id)) {
-            return this.postsInfo[id].postList.posts[this.postsInfo[id].postList.order[this.postsInfo[id].postList.order.length - 1]];
+            const postList = this.postsInfo[id].postList;
+
+            for (let i = postList.order.length - 1; i >= 0; i--) {
+                const postId = postList.order[i];
+
+                if (postList.posts[postId].state !== Constants.POST_DELETED) {
+                    return postList.posts[postId];
+                }
+            }
         }
 
         return null;
@@ -126,7 +134,13 @@ class PostStoreClass extends EventEmitter {
 
     getLatestPost(id) {
         if (this.postsInfo.hasOwnProperty(id)) {
-            return this.postsInfo[id].postList.posts[this.postsInfo[id].postList.order[0]];
+            const postList = this.postsInfo[id].postList;
+
+            for (const postId of postList.order) {
+                if (postList.posts[postId].state !== Constants.POST_DELETED) {
+                    return postList.posts[postId];
+                }
+            }
         }
 
         return null;
@@ -318,7 +332,8 @@ class PostStoreClass extends EventEmitter {
             // make sure to copy the post so that component state changes work properly
             postList.posts[post.id] = Object.assign({}, post, {
                 state: Constants.POST_DELETED,
-                file_ids: []
+                file_ids: [],
+                has_reactions: false
             });
         }
     }