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>

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