MM-51482_Create Apps Category and link to bots DM (#22918)

server/model/channel_sidebar.go

@@ -13,11 +13,12 @@ type SidebarCategoryType string
 type SidebarCategorySorting string
 
 const (
-	// Each sidebar category has a 'type'. System categories are Channels, Favorites and DMs
+	// Each sidebar category has a 'type'. System categories are Channels, Favorites, DMs and Apps
 	// All user-created categories will have type Custom
 	SidebarCategoryChannels       SidebarCategoryType = "channels"
 	SidebarCategoryDirectMessages SidebarCategoryType = "direct_messages"
 	SidebarCategoryFavorites      SidebarCategoryType = "favorites"
+	SidebarCategoryApps           SidebarCategoryType = "apps"
 	SidebarCategoryCustom         SidebarCategoryType = "custom"
 	// Increment to use when adding/reordering things in the sidebar
 	MinimalSidebarSortDistance = 10
@@ -25,6 +26,7 @@ const (
 	DefaultSidebarSortOrderFavorites = 0
 	DefaultSidebarSortOrderChannels  = DefaultSidebarSortOrderFavorites + MinimalSidebarSortDistance
 	DefaultSidebarSortOrderDMs       = DefaultSidebarSortOrderChannels + MinimalSidebarSortDistance
+	DefaultSidebarSortOrderApps      = DefaultSidebarSortOrderDMs + MinimalSidebarSortDistance
 	// Sorting modes
 	// default for all categories except DMs (behaves like manual)
 	SidebarCategorySortDefault SidebarCategorySorting = ""
@@ -36,6 +38,13 @@ const (
 	SidebarCategorySortAlphabetical SidebarCategorySorting = "alpha"
 )
 
+var SystemSidebarCategories = []SidebarCategoryType{
+	SidebarCategoryChannels,
+	SidebarCategoryDirectMessages,
+	SidebarCategoryFavorites,
+	SidebarCategoryApps,
+}
+
 // SidebarCategory represents the corresponding DB table
 type SidebarCategory struct {
 	Id          string                 `json:"id"`
@@ -77,7 +86,7 @@ type SidebarChannel struct {
 type SidebarChannels []*SidebarChannel
 type SidebarCategoriesWithChannels []*SidebarCategoryWithChannels
 
-var categoryIdPattern = regexp.MustCompile("(favorites|channels|direct_messages)_[a-z0-9]{26}_[a-z0-9]{26}")
+var categoryIdPattern = regexp.MustCompile("(favorites|channels|direct_messages|apps)_[a-z0-9]{26}_[a-z0-9]{26}")
 
 func IsValidCategoryId(s string) bool {
 	// Category IDs can either be regular IDs