Unfurl Focalboard Server PR (#18271)

* Allow Embeds editing without editing

* Add focalboard to embed after it being in props

* Fix tests

* change to boards

* remove extra gunk

* Fix tests

* Add Feature Flag

* update boardsunfurl

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/post_metadata.go

@@ -108,6 +108,7 @@ func (a *App) PreparePostForClient(originalPost *model.Post, isNewPost, isEditPo
 	if post.DeleteAt > 0 {
 		// For deleted posts we don't fill out metadata nor do we return the post content
 		post.Message = ""
+		post.Metadata = &model.PostMetadata{}
 		return post
 	}
 
@@ -142,6 +143,11 @@ func (a *App) getEmbedsAndImages(post *model.Post, isNewPost bool) *model.Post {
 
 	// Embeds and image dimensions
 	firstLink, images := a.getFirstLinkAndImages(post.Message)
+
+	if post.Metadata.Embeds == nil {
+		post.Metadata.Embeds = []*model.PostEmbed{}
+	}
+
 	if embed, err := a.getEmbedForPost(post, firstLink, isNewPost); err != nil {
 		appErr, ok := err.(*model.AppError)
 		isNotFound := ok && appErr.StatusCode == http.StatusNotFound
@@ -149,12 +155,9 @@ func (a *App) getEmbedsAndImages(post *model.Post, isNewPost bool) *model.Post {
 		if !isNotFound {
 			mlog.Debug("Failed to get embedded content for a post", mlog.String("post_id", post.Id), mlog.Err(err))
 		}
-	} else if embed == nil {
-		post.Metadata.Embeds = []*model.PostEmbed{}
-	} else {
-		post.Metadata.Embeds = []*model.PostEmbed{embed}
+	} else if embed != nil {
+		post.Metadata.Embeds = append(post.Metadata.Embeds, embed)
 	}
-
 	post.Metadata.Images = a.getImagesForPost(post, images, isNewPost)
 	return post
 }
@@ -227,6 +230,13 @@ func (a *App) getEmbedForPost(post *model.Post, firstLink string, isNewPost bool
 		}, nil
 	}
 
+	if _, ok := post.GetProps()["boards"]; ok && a.Config().FeatureFlags.BoardsUnfurl {
+		return &model.PostEmbed{
+			Type: model.PostEmbedBoards,
+			Data: post.GetProps()["boards"],
+		}, nil
+	}
+
 	if firstLink == "" {
 		return nil, nil
 	}

app/post_metadata_test.go

@@ -420,8 +420,8 @@ func TestPreparePostForClient(t *testing.T) {
 	And this is our icon: ` + server.URL + `/test-image1.png`,
 		}, th.BasicChannel, false, true)
 		require.Nil(t, err)
-
-		clientPost := th.App.PreparePostForClient(post, false, false)
+		post.Metadata.Embeds = nil
+		clientPost := th.App.PreparePostForClientWithEmbedsAndImages(post, false, false)
 
 		// Reminder that only the first link gets an embed and dimensions
 
@@ -498,8 +498,8 @@ func TestPreparePostForClient(t *testing.T) {
 			},
 		}, th.BasicChannel, false, true)
 		require.Nil(t, err)
-
-		clientPost := th.App.PreparePostForClient(post, false, false)
+		post.Metadata.Embeds = nil
+		clientPost := th.App.PreparePostForClientWithEmbedsAndImages(post, false, false)
 
 		t.Run("populates embeds", func(t *testing.T) {
 			assert.ElementsMatch(t, []*model.PostEmbed{
@@ -534,6 +534,7 @@ func TestPreparePostForClient(t *testing.T) {
 			ChannelId: th.BasicChannel.Id,
 		}, th.BasicChannel, false, true)
 		require.Nil(t, err)
+		post.Metadata.Embeds = nil
 
 		th.AddReactionToPost(post, th.BasicUser, "taco")
 
@@ -567,6 +568,7 @@ func TestPreparePostForClient(t *testing.T) {
 			Message:   "hello world",
 		}, th.BasicChannel, false, true)
 		require.Nil(t, err)
+		referencedPost.Metadata.Embeds = nil
 
 		link := fmt.Sprintf("%s/%s/pl/%s", *th.App.Config().ServiceSettings.SiteURL, th.BasicTeam.Name, referencedPost.Id)
 
@@ -576,8 +578,8 @@ func TestPreparePostForClient(t *testing.T) {
 			Message:   link,
 		}, th.BasicChannel, false, true)
 		require.Nil(t, err)
-
-		clientPost := th.App.PreparePostForClient(previewPost, false, false)
+		previewPost.Metadata.Embeds = nil
+		clientPost := th.App.PreparePostForClientWithEmbedsAndImages(previewPost, false, false)
 		firstEmbed := clientPost.Metadata.Embeds[0]
 		preview := firstEmbed.Data.(*model.PreviewPost)
 		require.Equal(t, referencedPost.Id, preview.PostID)
@@ -723,7 +725,8 @@ func testProxyOpenGraphImage(t *testing.T, th *TestHelper, shouldProxy bool) {
 	}, th.BasicChannel, false, true)
 	require.Nil(t, err)
 
-	embeds := th.App.PreparePostForClient(post, false, false).Metadata.Embeds
+	post.Metadata.Embeds = nil
+	embeds := th.App.PreparePostForClientWithEmbedsAndImages(post, false, false).Metadata.Embeds
 	require.Len(t, embeds, 1, "should have one embed")
 
 	embed := embeds[0]

model/feature_flags.go

@@ -49,6 +49,9 @@ type FeatureFlags struct {
 
 	// Enable different treatments for first time users, possible values = ("none", "tips_and_next_steps")
 	DownloadAppsCTA string
+
+	// Enable Boards Unfurl Preview
+	BoardsUnfurl bool
 }
 
 func (f *FeatureFlags) SetDefaults() {
@@ -66,6 +69,7 @@ func (f *FeatureFlags) SetDefaults() {
 	f.AddChannelButton = "by_team_name"
 	f.PrewrittenMessages = "none"
 	f.DownloadAppsCTA = "none"
+	f.BoardsUnfurl = true
 }
 
 func (f *FeatureFlags) Plugins() map[string]string {

model/post_embed.go

@@ -9,6 +9,7 @@ const (
 	PostEmbedOpengraph         PostEmbedType = "opengraph"
 	PostEmbedLink              PostEmbedType = "link"
 	PostEmbedPermalink         PostEmbedType = "permalink"
+	PostEmbedBoards            PostEmbedType = "boards"
 )
 
 type PostEmbedType string