feat: add protobufs

.vscode/settings.json

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+{
+	"protoc": {
+    "options": ["-I ./api/proto"]
+  }
+}

Makefile

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+.PHONY: generate
+generate:
+	@./scripts/generate

api/proto/gen/gallery/v0/gallery.go

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+package gallerypb
+
+import (
+	imagepb "github.com/modernice/media-entity/api/proto/gen/image/v0"
+	"github.com/modernice/media-entity/gallery"
+	"github.com/modernice/media-entity/internal/slicex"
+)
+
+type StringID string
+
+func (id StringID) String() string {
+	return string(id)
+}
+
+func newStringID(id string) StringID {
+	return StringID(id)
+}
+
+func New[StackID, ImageID gallery.ID](g gallery.DTO[StackID, ImageID]) *Gallery {
+	return &Gallery{
+		Stacks: slicex.Map(g.Stacks, NewStack[StackID, ImageID]),
+	}
+}
+
+func AsGallery[StackID, ImageID gallery.ID](g *Gallery, toStackID func(string) StackID, toImageID func(string) ImageID) gallery.DTO[StackID, ImageID] {
+	return gallery.DTO[StackID, ImageID]{
+		Stacks: slicex.Map(g.GetStacks(), func(s *Stack) gallery.Stack[StackID, ImageID] {
+			return AsStack(s, toStackID, toImageID)
+		}),
+	}
+}
+
+func (g *Gallery) AsGallery() gallery.DTO[StringID, StringID] {
+	return AsGallery(g, newStringID, newStringID)
+}
+
+func NewStack[StackID, ImageID gallery.ID](s gallery.Stack[StackID, ImageID]) *Stack {
+	return &Stack{
+		Id:       s.ID.String(),
+		Variants: slicex.Map(s.Variants, NewVariant[ImageID]),
+		Tags:     s.Tags,
+	}
+}
+
+func AsStack[StackID, ImageID gallery.ID](s *Stack, toStackID func(string) StackID, toImageID func(string) ImageID) gallery.Stack[StackID, ImageID] {
+	return gallery.Stack[StackID, ImageID]{
+		ID: toStackID(s.GetId()),
+		Variants: slicex.Map(s.GetVariants(), func(img *Image) gallery.Image[ImageID] {
+			return AsImage(img, toImageID)
+		}),
+	}
+}
+
+func (s *Stack) AsStack() gallery.Stack[StringID, StringID] {
+	return AsStack(s, newStringID, newStringID)
+}
+
+func NewVariant[ID gallery.ID](img gallery.Image[ID]) *Image {
+	return &Image{
+		Image:    imagepb.New(img.Image),
+		Id:       img.ID.String(),
+		Original: img.Original,
+	}
+}
+
+func AsImage[ID gallery.ID](img *Image, toImageID func(string) ID) gallery.Image[ID] {
+	return gallery.Image[ID]{
+		Image:    img.GetImage().AsImage(),
+		ID:       toImageID(img.GetId()),
+		Original: img.GetOriginal(),
+	}
+}
+
+func (img *Image) AsImage() gallery.Image[StringID] {
+	return AsImage(img, newStringID)
+}