MM-12826 Include list of reactions in post metadata instead of just counts (#9749)

app/post_metadata.go

@@ -59,11 +59,11 @@ func (a *App) PreparePostForClient(originalPost *model.Post) (*model.Post, *mode
 		post.Metadata = &model.PostMetadata{}
 
 		// Emojis and reaction counts
-		if emojis, reactionCounts, err := a.getEmojisAndReactionCountsForPost(post); err != nil {
+		if emojis, reactions, err := a.getEmojisAndReactionsForPost(post); err != nil {
 			mlog.Warn("Failed to get emojis and reactions for a post", mlog.String("post_id", post.Id), mlog.Any("err", err))
 		} else {
 			post.Metadata.Emojis = emojis
-			post.Metadata.ReactionCounts = reactionCounts
+			post.Metadata.Reactions = reactions
 		}
 
 		// Files
@@ -90,7 +90,7 @@ func (a *App) PreparePostForClient(originalPost *model.Post) (*model.Post, *mode
 	return post, nil
 }
 
-func (a *App) getEmojisAndReactionCountsForPost(post *model.Post) ([]*model.Emoji, model.ReactionCounts, *model.AppError) {
+func (a *App) getEmojisAndReactionsForPost(post *model.Post) ([]*model.Emoji, []*model.Reaction, *model.AppError) {
 	reactions, err := a.GetReactionsForPost(post.Id)
 	if err != nil {
 		return nil, nil, err
@@ -101,7 +101,7 @@ func (a *App) getEmojisAndReactionCountsForPost(post *model.Post) ([]*model.Emoj
 		return nil, nil, err
 	}
 
-	return emojis, model.CountReactions(reactions), nil
+	return emojis, reactions, nil
 }
 
 func (a *App) getEmbedForPost(post *model.Post, firstLink string) (*model.PostEmbed, error) {

app/post_metadata_test.go

@@ -52,7 +52,7 @@ func TestPreparePostForClient(t *testing.T) {
 			assert.Equal(t, message, clientPost.Message, "shouldn't have changed Message")
 			assert.NotEqual(t, nil, clientPost.Metadata, "should've populated Metadata")
 			assert.Len(t, clientPost.Metadata.Embeds, 0, "should've populated Embeds")
-			assert.Len(t, clientPost.Metadata.ReactionCounts, 0, "should've populated ReactionCounts")
+			assert.Len(t, clientPost.Metadata.Reactions, 0, "should've populated Reactions")
 			assert.Len(t, clientPost.Metadata.Files, 0, "should've populated Files")
 			assert.Len(t, clientPost.Metadata.Emojis, 0, "should've populated Emojis")
 			assert.Len(t, clientPost.Metadata.Images, 0, "should've populated Images")
@@ -73,19 +73,22 @@ func TestPreparePostForClient(t *testing.T) {
 		assert.Equal(t, clientPost, post, "shouldn't have changed any metadata")
 	})
 
-	t.Run("reaction counts", func(t *testing.T) {
+	t.Run("reactions", func(t *testing.T) {
 		th := setup()
 		defer th.TearDown()
 
 		post := th.CreatePost(th.BasicChannel)
-		th.AddReactionToPost(post, th.BasicUser, "smile")
+		reaction1 := th.AddReactionToPost(post, th.BasicUser, "smile")
+		reaction2 := th.AddReactionToPost(post, th.BasicUser2, "smile")
+		reaction3 := th.AddReactionToPost(post, th.BasicUser2, "ice_cream")
 
 		clientPost, err := th.App.PreparePostForClient(post)
 		require.Nil(t, err)
 
-		assert.Equal(t, model.ReactionCounts{
-			"smile": 1,
-		}, clientPost.Metadata.ReactionCounts, "should've populated ReactionCounts")
+		assert.Len(t, clientPost.Metadata.Reactions, 3, "should've populated Reactions")
+		assert.Equal(t, reaction1, clientPost.Metadata.Reactions[0], "first reaction is incorrect")
+		assert.Equal(t, reaction2, clientPost.Metadata.Reactions[1], "second reaction is incorrect")
+		assert.Equal(t, reaction3, clientPost.Metadata.Reactions[2], "third reaction is incorrect")
 	})
 
 	t.Run("files", func(t *testing.T) {
@@ -139,10 +142,8 @@ func TestPreparePostForClient(t *testing.T) {
 		})
 
 		t.Run("populates reaction counts", func(t *testing.T) {
-			reactionCounts := clientPost.Metadata.ReactionCounts
-			assert.Len(t, reactionCounts, 2, "should've populated ReactionCounts")
-			assert.Equal(t, 1, reactionCounts["smile"], "should've included 'smile' in ReactionCounts")
-			assert.Equal(t, 2, reactionCounts["angry"], "should've included 'angry' in ReactionCounts")
+			reactions := clientPost.Metadata.Reactions
+			assert.Len(t, reactions, 3, "should've populated Reactions")
 		})
 	})
 
@@ -178,11 +179,8 @@ func TestPreparePostForClient(t *testing.T) {
 		})
 
 		t.Run("populates reaction counts", func(t *testing.T) {
-			reactionCounts := clientPost.Metadata.ReactionCounts
-			assert.Len(t, reactionCounts, 3, "should've populated ReactionCounts")
-			assert.Equal(t, 1, reactionCounts[emoji1.Name], "should've included emoji1 in ReactionCounts")
-			assert.Equal(t, 2, reactionCounts[emoji2.Name], "should've included emoji2 in ReactionCounts")
-			assert.Equal(t, 1, reactionCounts["angry"], "should've included angry in ReactionCounts")
+			reactions := clientPost.Metadata.Reactions
+			assert.Len(t, reactions, 4, "should've populated Reactions")
 		})
 	})