Chore: Introduce playlist service (#52252)

* Store: Introduce playlist service

* Integrate playlist service

* Update swagger

pkg/services/playlist/model.go

@@ -0,0 +1,95 @@
+package playlist
+
+import (
+	"errors"
+)
+
+// Typed errors
+var (
+	ErrPlaylistNotFound                = errors.New("Playlist not found")
+	ErrPlaylistFailedGenerateUniqueUid = errors.New("failed to generate unique playlist UID")
+	ErrCommandValidationFailed         = errors.New("command missing required fields")
+)
+
+// Playlist model
+type Playlist struct {
+	Id       int64  `json:"id"`
+	UID      string `json:"uid" xorm:"uid"`
+	Name     string `json:"name"`
+	Interval string `json:"interval"`
+	OrgId    int64  `json:"-"`
+}
+
+type PlaylistDTO struct {
+	Id       int64             `json:"id"`
+	UID      string            `json:"uid"`
+	Name     string            `json:"name"`
+	Interval string            `json:"interval"`
+	OrgId    int64             `json:"-"`
+	Items    []PlaylistItemDTO `json:"items"`
+}
+
+type PlaylistItemDTO struct {
+	Id         int64  `json:"id"`
+	PlaylistId int64  `json:"playlistid"`
+	Type       string `json:"type"`
+	Title      string `json:"title"`
+	Value      string `json:"value"`
+	Order      int    `json:"order"`
+}
+
+type PlaylistItem struct {
+	Id         int64
+	PlaylistId int64
+	Type       string
+	Value      string
+	Order      int
+	Title      string
+}
+
+type Playlists []*Playlist
+
+//
+// COMMANDS
+//
+
+type UpdatePlaylistCommand struct {
+	OrgId    int64             `json:"-"`
+	UID      string            `json:"uid"`
+	Name     string            `json:"name" binding:"Required"`
+	Interval string            `json:"interval"`
+	Items    []PlaylistItemDTO `json:"items"`
+}
+
+type CreatePlaylistCommand struct {
+	Name     string            `json:"name" binding:"Required"`
+	Interval string            `json:"interval"`
+	Items    []PlaylistItemDTO `json:"items"`
+
+	OrgId int64 `json:"-"`
+}
+
+type DeletePlaylistCommand struct {
+	UID   string
+	OrgId int64
+}
+
+//
+// QUERIES
+//
+
+type GetPlaylistsQuery struct {
+	Name  string
+	Limit int
+	OrgId int64
+}
+
+type GetPlaylistByUidQuery struct {
+	UID   string
+	OrgId int64
+}
+
+type GetPlaylistItemsByUidQuery struct {
+	PlaylistUID string
+	OrgId       int64
+}