feat: image variants engine

2026-10-08 02:33:32 +02:00
1 parent f0845de643
commit f1d56ef50e
@@ -13,6 +13,7 @@ import (
 	"RenewCMS/internal/infrastructure/auditing"
 	"RenewCMS/internal/infrastructure/config"
 	"RenewCMS/internal/infrastructure/hashing"
+	"RenewCMS/internal/infrastructure/imaging"
 	"RenewCMS/internal/infrastructure/mailer"
 	"RenewCMS/internal/infrastructure/markdown"
 	"RenewCMS/internal/infrastructure/persistence/database"
@@ -87,6 +88,13 @@ type UseCases struct {
 	ExportActivityUseCase          *useCases.ExportActivityUseCase
 	GetActivityRetentionUseCase    *useCases.GetActivityRetentionUseCase
 	UpdateActivityRetentionUseCase *useCases.UpdateActivityRetentionUseCase
+	ListVariantsUseCase            *useCases.ListVariantsUseCase
+	CreateVariantUseCase           *useCases.CreateVariantUseCase
+	UpdateVariantUseCase           *useCases.UpdateVariantUseCase
+	SetVariantEnabledUseCase       *useCases.SetVariantEnabledUseCase
+	DeleteVariantUseCase           *useCases.DeleteVariantUseCase
+	PurgeVariantUseCase            *useCases.PurgeVariantUseCase
+	ServeVariantUseCase            *useCases.ServeVariantUseCase
 }

 func (c *UseCases) RunSchedulers(ctx context.Context) {
@@ -108,6 +116,9 @@ type Repositories struct {
 	ArticleRepo       domainArticle.Repository
 	UserRepo          domainUser.Repository
 	ImageRepo         domainImage.Repository
+	VariantRepo       domainImage.VariantRepository
+	VariantFileRepo   domainImage.VariantFileRepository
+	VariantRenderer   domainImage.VariantRenderer
 	InviteRepo        domainInvite.Repository
 	APIKeyRepo        domainAPIKey.Repository
 	PurgeSettingsRepo domainPurge.Repository
@@ -240,6 +251,9 @@ func getRepositories(connection *database.Connection, settings config.Settings)
 		ArticleRepo:       persistence.NewArticleRepository(db),
 		UserRepo:          persistence.NewUserRepository(db),
 		ImageRepo:         persistence.NewImageRepository(db),
+		VariantRepo:       persistence.NewVariantRepository(db),
+		VariantFileRepo:   persistence.NewVariantFileRepository(db),
+		VariantRenderer:   imaging.NewVariantRenderer(),
 		InviteRepo:        persistence.NewInviteRepository(db),
 		APIKeyRepo:        persistence.NewAPIKeyRepository(db),
 		PurgeSettingsRepo: persistence.NewPurgeSettingsRepository(db),
@@ -265,7 +279,7 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 	renderer := markdown.NewConverter()
 	keyGenerator := hashing.NewSHA256KeyGenerator()
 	recorder := auditing.NewRecorder(repos.AuditRepo, time.Now, log.Default())
-	mergeMedia := useCases.NewMergeMediaUseCase(repos.ImageRepo, repos.ArticleRepo, imageStorage, recorder)
+	mergeMedia := useCases.NewMergeMediaUseCase(repos.ImageRepo, repos.ArticleRepo, imageStorage, repos.VariantFileRepo, recorder)

 	runPurge := useCases.NewRunPurgeUseCase(repos.ImageRepo, repos.ArticleRepo, mergeMedia, repos.PurgeSettingsRepo, time.Now, log.Default(), recorder)
 	purgeScheduler := useCases.NewPurgeSchedulerUseCase(repos.PurgeSettingsRepo, runPurge, recorder)
@@ -300,7 +314,7 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 		OpenMediaUseCase:               useCases.NewOpenMediaUseCase(imageStorage),
 		ListMediaUseCase:               useCases.NewListMediaUseCase(repos.ImageRepo, repos.ArticleRepo, repos.UserRepo),
 		RenameMediaUseCase:             useCases.NewRenameMediaUseCase(repos.ImageRepo, recorder),
-		DeleteMediaUseCase:             useCases.NewDeleteMediaUseCase(repos.ImageRepo, imageStorage, recorder),
+		DeleteMediaUseCase:             useCases.NewDeleteMediaUseCase(repos.ImageRepo, imageStorage, repos.VariantFileRepo, recorder),
 		MergeMediaUseCase:              mergeMedia,
 		GetMediaUsageUseCase:           useCases.NewGetMediaUsageUseCase(repos.ImageRepo, repos.ArticleRepo),
 		GetPurgeSettingsUseCase:        useCases.NewGetPurgeSettingsUseCase(repos.PurgeSettingsRepo),
@@ -322,6 +336,13 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 		ExportActivityUseCase:          useCases.NewExportActivityUseCase(repos.AuditRepo, time.Now),
 		GetActivityRetentionUseCase:    useCases.NewGetActivityRetentionUseCase(repos.AuditSettingsRepo, repos.AuditRepo, time.Now),
 		UpdateActivityRetentionUseCase: useCases.NewUpdateActivityRetentionUseCase(repos.AuditSettingsRepo, repos.AuditRepo, recorder, time.Now),
+		ListVariantsUseCase:            useCases.NewListVariantsUseCase(repos.VariantRepo, repos.VariantFileRepo),
+		CreateVariantUseCase:           useCases.NewCreateVariantUseCase(repos.VariantRepo, repos.VariantRenderer, time.Now, recorder),
+		UpdateVariantUseCase:           useCases.NewUpdateVariantUseCase(repos.VariantRepo, repos.VariantFileRepo, imageStorage, repos.VariantRenderer, time.Now, recorder),
+		SetVariantEnabledUseCase:       useCases.NewSetVariantEnabledUseCase(repos.VariantRepo, repos.VariantFileRepo, time.Now, recorder),
+		DeleteVariantUseCase:           useCases.NewDeleteVariantUseCase(repos.VariantRepo, repos.VariantFileRepo, imageStorage, recorder),
+		PurgeVariantUseCase:            useCases.NewPurgeVariantUseCase(repos.VariantRepo, repos.VariantFileRepo, imageStorage, recorder),
+		ServeVariantUseCase:            useCases.NewServeVariantUseCase(repos.VariantRepo, repos.VariantFileRepo, repos.ImageRepo, imageStorage, repos.VariantRenderer, useCases.ServeVariantLimits{MaxSourceBytes: settings.ImageVariantMaxSourceBytes, MaxSourcePixels: settings.ImageVariantMaxSourcePixels, MaxConcurrentRenders: settings.ImageVariantMaxConcurrentRenders}),
 	}
 }

@@ -0,0 +1,264 @@
+package imagevariant
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	validator "RenewCMS/api/pkg/validator"
+	"RenewCMS/internal/domain/image"
+	"RenewCMS/internal/infrastructure/useCases"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	validatorlib "github.com/go-playground/validator/v10"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type Handler struct {
+	list       *useCases.ListVariantsUseCase
+	create     *useCases.CreateVariantUseCase
+	update     *useCases.UpdateVariantUseCase
+	setEnabled *useCases.SetVariantEnabledUseCase
+	remove     *useCases.DeleteVariantUseCase
+	purge      *useCases.PurgeVariantUseCase
+}
+
+func NewHandler(list *useCases.ListVariantsUseCase, create *useCases.CreateVariantUseCase, update *useCases.UpdateVariantUseCase, setEnabled *useCases.SetVariantEnabledUseCase, remove *useCases.DeleteVariantUseCase, purge *useCases.PurgeVariantUseCase) *Handler {
+	return &Handler{list, create, update, setEnabled, remove, purge}
+}
+
+type definitionRequest struct {
+	Width   *int   `json:"width" validate:"required_without=Height,omitempty,min=1,max=8000"`
+	Height  *int   `json:"height" validate:"required_without=Width,omitempty,min=1,max=8000"`
+	Fit     string `json:"fit" validate:"omitempty,oneof=cover contain inside"`
+	Format  string `json:"format" validate:"omitempty,oneof=original jpeg png webp"`
+	Quality *int   `json:"quality" validate:"omitempty,min=1,max=100"`
+}
+
+type switchesRequest struct {
+	GenerateOnUpload *bool `json:"generate_on_upload"`
+	Enabled          *bool `json:"enabled"`
+}
+
+type createRequest struct {
+	Name string `json:"name" validate:"required,variantname"`
+	definitionRequest
+	switchesRequest
+}
+
+type updateRequest struct {
+	definitionRequest
+	switchesRequest
+}
+
+type enabledRequest struct {
+	Enabled *bool `json:"enabled" validate:"required"`
+}
+
+type variantResponse struct {
+	Name             string              `json:"name"`
+	Width            *int                `json:"width"`
+	Height           *int                `json:"height"`
+	Fit              image.VariantFit    `json:"fit"`
+	Format           image.VariantFormat `json:"format"`
+	Quality          *int                `json:"quality"`
+	GenerateOnUpload bool                `json:"generate_on_upload"`
+	Enabled          bool                `json:"enabled"`
+	GeneratedFiles   int                 `json:"generated_files"`
+	CacheSize        int64               `json:"cache_size"`
+	CreatedAt        time.Time           `json:"created_at"`
+	UpdatedAt        time.Time           `json:"updated_at"`
+}
+
+type updatedVariantResponse struct {
+	variantResponse
+	PurgedFiles int `json:"purged_files"`
+}
+
+type listResponse struct {
+	Items []variantResponse `json:"items"`
+}
+
+type purgeResponse struct {
+	PurgedFiles int   `json:"purged_files"`
+	PurgedBytes int64 `json:"purged_bytes"`
+}
+
+func responseOf(summary useCases.VariantSummary) variantResponse {
+	variant := summary.Variant
+	return variantResponse{
+		Name:             variant.Name,
+		Width:            variant.Width,
+		Height:           variant.Height,
+		Fit:              variant.Fit,
+		Format:           variant.Format,
+		Quality:          variant.Quality,
+		GenerateOnUpload: variant.GenerateOnUpload,
+		Enabled:          variant.Enabled,
+		GeneratedFiles:   summary.GeneratedFiles,
+		CacheSize:        summary.CacheSize,
+		CreatedAt:        variant.CreatedAt,
+		UpdatedAt:        variant.UpdatedAt,
+	}
+}
+
+func (h *Handler) List(w http.ResponseWriter, _ *http.Request) {
+	summaries, err := h.list.List()
+	if err != nil {
+		h.writeError(w, "", err)
+		return
+	}
+	items := make([]variantResponse, 0, len(summaries))
+	for _, summary := range summaries {
+		items = append(items, responseOf(summary))
+	}
+	writeJSON(w, http.StatusOK, listResponse{items})
+}
+
+func (h *Handler) Create(w http.ResponseWriter, r *http.Request) {
+	var request createRequest
+	if !h.decode(w, r, &request) {
+		return
+	}
+
+	summary, err := h.create.Create(r.Context(), useCases.CreateVariantCommand{
+		Name:                     request.Name,
+		VariantDefinitionCommand: request.definitionRequest.command(),
+		GenerateOnUpload:         request.GenerateOnUpload,
+		Enabled:                  request.Enabled,
+	})
+	if err != nil {
+		h.writeError(w, request.Name, err)
+		return
+	}
+	writeJSON(w, http.StatusCreated, responseOf(summary))
+}
+
+func (h *Handler) Update(w http.ResponseWriter, r *http.Request) {
+	var request updateRequest
+	if !h.decode(w, r, &request) {
+		return
+	}
+
+	name := chi.URLParam(r, "name")
+	result, err := h.update.Update(r.Context(), useCases.UpdateVariantCommand{
+		Name:                     name,
+		VariantDefinitionCommand: request.definitionRequest.command(),
+		GenerateOnUpload:         request.GenerateOnUpload,
+		Enabled:                  request.Enabled,
+	})
+	if err != nil {
+		h.writeError(w, name, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, updatedVariantResponse{responseOf(result.VariantSummary), result.PurgedFiles})
+}
+
+func (h *Handler) SetEnabled(w http.ResponseWriter, r *http.Request) {
+	var request enabledRequest
+	if !h.decode(w, r, &request) {
+		return
+	}
+
+	name := chi.URLParam(r, "name")
+	summary, err := h.setEnabled.SetEnabled(r.Context(), name, *request.Enabled)
+	if err != nil {
+		h.writeError(w, name, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, responseOf(summary))
+}
+
+func (h *Handler) Delete(w http.ResponseWriter, r *http.Request) {
+	name := chi.URLParam(r, "name")
+	if err := h.remove.Delete(r.Context(), name); err != nil {
+		h.writeError(w, name, err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}
+
+func (h *Handler) Purge(w http.ResponseWriter, r *http.Request) {
+	name := chi.URLParam(r, "name")
+	purged, err := h.purge.Purge(r.Context(), name)
+	if err != nil {
+		h.writeError(w, name, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, purgeResponse{purged.Files, purged.Bytes})
+}
+
+func (d definitionRequest) command() useCases.VariantDefinitionCommand {
+	return useCases.VariantDefinitionCommand{Width: d.Width, Height: d.Height, Fit: d.Fit, Format: d.Format, Quality: d.Quality}
+}
+
+func (h *Handler) decode(w http.ResponseWriter, r *http.Request, request any) bool {
+	if err := json.NewDecoder(r.Body).Decode(request); err != nil {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return false
+	}
+	if err := validator.Validate.Struct(request); err != nil {
+		http.Error(w, h.validationMessage(err), http.StatusUnprocessableEntity)
+		return false
+	}
+	return true
+}
+
+func (h *Handler) validationMessage(err error) string {
+	var failures validatorlib.ValidationErrors
+	if !errors.As(err, &failures) || len(failures) == 0 {
+		return apperr.VariantInvalidErrorMessage
+	}
+	switch failures[0].StructField() {
+	case "Name":
+		return apperr.VariantNameErrorMessage
+	case "Width", "Height":
+		return apperr.VariantDimensionsErrorMessage
+	case "Fit":
+		return apperr.VariantFitErrorMessage
+	case "Format":
+		return h.formatMessage()
+	case "Quality":
+		return apperr.VariantQualityErrorMessage
+	default:
+		return apperr.VariantInvalidErrorMessage
+	}
+}
+
+func (h *Handler) formatMessage() string {
+	encodable := h.create.EncodableFormats()
+	names := make([]string, 0, len(encodable))
+	for _, format := range encodable {
+		names = append(names, string(format))
+	}
+	last := len(names) - 1
+	return fmt.Sprintf(apperr.VariantFormatErrorMessageFormat, strings.Join(names[:last], ", ")+" or "+names[last])
+}
+
+func (h *Handler) writeError(w http.ResponseWriter, name string, err error) {
+	switch {
+	case errors.Is(err, image.ErrVariantNotFound):
+		http.Error(w, apperr.VariantNotFoundErrorMessage, http.StatusNotFound)
+	case errors.Is(err, image.ErrVariantExists):
+		http.Error(w, fmt.Sprintf(apperr.VariantExistsErrorMessageFormat, name), http.StatusConflict)
+	case errors.Is(err, image.ErrVariantFormatUnavailable):
+		http.Error(w, h.formatMessage(), http.StatusUnprocessableEntity)
+	case errors.Is(err, image.ErrVariantInvalid):
+		http.Error(w, apperr.VariantInvalidErrorMessage, http.StatusUnprocessableEntity)
+	default:
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+	}
+}
+
+func writeJSON(w http.ResponseWriter, status int, value any) {
+	body, err := json.Marshal(value)
+	if err != nil {
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+	w.WriteHeader(status)
+	_, _ = w.Write(body)
+}
@@ -1,8 +1,10 @@
 package staticimages

 import (
+	"RenewCMS/api/pkg/apperr"
 	"RenewCMS/internal/domain/image"
 	"RenewCMS/internal/infrastructure/useCases"
+	"encoding/json"
 	"errors"
 	"io"
 	"net/http"
@@ -17,31 +19,115 @@ import (
 const cacheControl = "public, no-cache"
 const svgContentSecurityPolicy = "default-src 'none'; style-src 'unsafe-inline'; sandbox"
 const fallbackContentType = "application/octet-stream"
+const unknownVariantCode = "unknown_variant"
+const unsupportedParameterCode = "unsupported_parameter"

 var contentTypeExtensions = map[string]string{
 	".png":  "image/png",
 	".jpeg": "image/jpeg",
 	".webp": "image/webp",
 	".svg":  "image/svg+xml",
+	".gif":  "image/gif",
 }

 type Handler struct {
-	openMedia *useCases.OpenMediaUseCase
-	modTime   time.Time
+	openMedia    *useCases.OpenMediaUseCase
+	serveVariant *useCases.ServeVariantUseCase
+	modTime      time.Time
 }

-func NewHandler(openMedia *useCases.OpenMediaUseCase) *Handler {
+func NewHandler(openMedia *useCases.OpenMediaUseCase, serveVariant *useCases.ServeVariantUseCase) *Handler {
 	return &Handler{
-		openMedia: openMedia,
-		modTime:   time.Now(),
+		openMedia:    openMedia,
+		serveVariant: serveVariant,
+		modTime:      time.Now(),
 	}
 }

+type requestErrorBody struct {
+	Status  int    `json:"status"`
+	Error   string `json:"error"`
+	Message string `json:"message"`
+	Detail  string `json:"detail"`
+}
+
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("X-Content-Type-Options", "nosniff")

 	cleaned := cleanPath(requestedPath(r))
-	blob, err := h.openMedia.Open(cleaned)
+	served, err := h.serveVariant.Serve(variantRequestFrom(r, cleaned))
+	if err != nil {
+		writeServeError(w, r, err)
+		return
+	}
+	switch {
+	case served.NotModified:
+		writeNotModified(w, served)
+	case served.Original:
+		h.serveOriginal(w, r, cleaned)
+	default:
+		serveVariantFile(w, r, cleaned, served)
+	}
+}
+
+func variantRequestFrom(r *http.Request, storedName string) useCases.ServeVariantRequest {
+	query := r.URL.Query()
+	request := useCases.ServeVariantRequest{Context: r.Context(), StoredName: storedName, IfNoneMatch: r.Header.Get("If-None-Match")}
+	for parameter := range query {
+		request.Parameters = append(request.Parameters, parameter)
+	}
+	if query.Has(image.VariantQueryParameter) {
+		name := query.Get(image.VariantQueryParameter)
+		request.Variant = &name
+	}
+	return request
+}
+
+func writeServeError(w http.ResponseWriter, r *http.Request, err error) {
+	switch {
+	case errors.Is(err, image.ErrUnknownVariant):
+		writeRequestError(w, unknownVariantCode, apperr.VariantUnknownMessage, err)
+	case errors.Is(err, image.ErrUnsupportedParameter):
+		writeRequestError(w, unsupportedParameterCode, apperr.VariantUnsupportedParameterMessage, err)
+	case errors.Is(err, image.ErrBlobNotFound), errors.Is(err, image.ErrImageNotFound):
+		http.NotFound(w, r)
+	case errors.Is(err, image.ErrSourceTooLarge):
+		http.Error(w, apperr.VariantSourceTooLargeErrorMessage, http.StatusRequestEntityTooLarge)
+	default:
+		http.Error(w, "Unable to read the file", http.StatusInternalServerError)
+	}
+}
+
+func writeRequestError(w http.ResponseWriter, code string, message string, err error) {
+	body, marshalErr := json.Marshal(requestErrorBody{
+		Status:  http.StatusBadRequest,
+		Error:   code,
+		Message: message,
+		Detail:  image.VariantRequestDetail(err),
+	})
+	if marshalErr != nil {
+		http.Error(w, "Unable to read the file", http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusBadRequest)
+	_, _ = w.Write(body)
+}
+
+func writeNotModified(w http.ResponseWriter, served useCases.ServedVariant) {
+	w.Header().Set("ETag", served.ETag)
+	w.Header().Set("Cache-Control", cacheControl)
+	w.WriteHeader(http.StatusNotModified)
+}
+
+func serveVariantFile(w http.ResponseWriter, r *http.Request, name string, served useCases.ServedVariant) {
+	defer served.Content.Close()
+	w.Header().Set("ETag", served.ETag)
+	serveContent(w, r, name, served.ContentType, image.Blob{Content: served.Content, Size: served.Size, ModTime: served.ModTime})
+}
+
+func (h *Handler) serveOriginal(w http.ResponseWriter, r *http.Request, name string) {
+	blob, err := h.openMedia.Open(name)
 	if errors.Is(err, image.ErrBlobNotFound) {
 		http.NotFound(w, r)
 		return
@@ -52,7 +138,10 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	defer blob.Content.Close()

-	contentType := contentTypeFor(cleaned)
+	serveContent(w, r, name, contentTypeFor(name), blob)
+}
+
+func serveContent(w http.ResponseWriter, r *http.Request, name string, contentType string, blob image.Blob) {
 	w.Header().Set("Content-Type", contentType)
 	w.Header().Set("Cache-Control", cacheControl)
 	if contentType == "image/svg+xml" {
@@ -60,7 +149,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}

 	if content, ok := blob.Content.(io.ReadSeeker); ok {
-		http.ServeContent(w, r, cleaned, blob.ModTime, content)
+		http.ServeContent(w, r, name, blob.ModTime, content)
 		return
 	}
 	w.Header().Set("Content-Length", strconv.FormatInt(blob.Size, 10))
@@ -42,3 +42,14 @@ const OwnerOrAdminRequiredErrorMessage = "Only owners and admins can do this."
 const PurgeConflictErrorMessage = "The library changed, so nothing was purged. Check the new summary and try again."
 const PurgeBusyErrorMessage = "A purge is already running."
 const PurgeIntervalErrorMessage = "Enter a whole number of days between 1 and 365."
+const VariantNotFoundErrorMessage = "Variant not found"
+const VariantNameErrorMessage = "Use lowercase letters, numbers and dashes, 2 to 32 characters."
+const VariantDimensionsErrorMessage = "Width and height must be between 1 and 8000, and one of them is required."
+const VariantFitErrorMessage = "Fit must be cover, contain or inside."
+const VariantQualityErrorMessage = "Quality must be between 1 and 100."
+const VariantInvalidErrorMessage = "The variant is not valid."
+const VariantExistsErrorMessageFormat = "A variant named “%s” already exists. Choose another name."
+const VariantFormatErrorMessageFormat = "Format must be %s."
+const VariantSourceTooLargeErrorMessage = "The source image is too large to generate this variant."
+const VariantUnknownMessage = "Unknown variant"
+const VariantUnsupportedParameterMessage = "Unsupported parameter"
@@ -1,12 +1,14 @@
 package validator

 import (
+	"RenewCMS/internal/domain/image"
 	"regexp"

 	"github.com/go-playground/validator/v10"
 )

 const inviteEmailTag = "inviteemail"
+const variantNameTag = "variantname"

 var inviteEmailPattern = regexp.MustCompile(`^[^\s@]+@[^\s@.]+(\.[^\s@.]+)+$`)

@@ -15,6 +17,11 @@ var Validate *validator.Validate
 func InitValidator() {
 	Validate = validator.New()
 	_ = Validate.RegisterValidation(inviteEmailTag, isInviteEmail)
+	_ = Validate.RegisterValidation(variantNameTag, isVariantName)
+}
+
+func isVariantName(field validator.FieldLevel) bool {
+	return image.IsValidVariantName(field.Field().String())
 }

 func isInviteEmail(field validator.FieldLevel) bool {
@@ -6,6 +6,7 @@ import (
 	"RenewCMS/api/handlers/article"
 	"RenewCMS/api/handlers/auth"
 	"RenewCMS/api/handlers/frontend"
+	"RenewCMS/api/handlers/imagevariant"
 	"RenewCMS/api/handlers/media"
 	"RenewCMS/api/handlers/settings"
 	"RenewCMS/api/handlers/staticimages"
@@ -273,6 +274,27 @@ func NewMediaRouter(container *UseCases, trustedProxies []string) http.Handler {
 	return r
 }

+func NewImageVariantRouter(container *UseCases, trustedProxies []string) http.Handler {
+	r := chi.NewRouter()
+
+	variantHandler := imagevariant.NewHandler(container.ListVariantsUseCase, container.CreateVariantUseCase, container.UpdateVariantUseCase, container.SetVariantEnabledUseCase, container.DeleteVariantUseCase, container.PurgeVariantUseCase)
+
+	r.Use(jwtauth.Verifier(container.Token))
+	r.Use(middleware.AuditContext(container.GetUserUseCase, trustedProxies))
+	r.Use(middleware.RequireSignedIn)
+	r.Use(jwtauth.Authenticator(container.Token))
+	r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
+	r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
+	r.Use(middleware.RequireOwnerOrAdmin(container.GetUserUseCase))
+	r.Get("/", variantHandler.List)
+	r.Post("/", variantHandler.Create)
+	r.Put("/{name}", variantHandler.Update)
+	r.Patch("/{name}", variantHandler.SetEnabled)
+	r.Delete("/{name}", variantHandler.Delete)
+	r.Post("/{name}/purge", variantHandler.Purge)
+	return r
+}
+
 func InitBackendRoutes(container *UseCases, settings config.Settings) *chi.Mux {
 	r := chi.NewRouter()

@@ -289,6 +311,7 @@ func InitBackendRoutes(container *UseCases, settings config.Settings) *chi.Mux {
 	r.Mount("/settings", NewSettingsRouter(container, settings.TrustedProxies))
 	r.Mount("/activity", NewActivityRouter(container, settings.TrustedProxies))
 	r.Mount("/media", NewMediaRouter(container, settings.TrustedProxies))
+	r.Mount("/image-variants", NewImageVariantRouter(container, settings.TrustedProxies))
 	r.Mount("/api-key", NewAPIKeyRouter(container, settings.TrustedProxies))
 	r.Mount("/system", NewSystemRouter(container, settings.TrustedProxies))
 	r.Mount("/auth", NewAuthRouter(container, settings.IsProduction(), settings.AuthRateLimit, settings.TrustedProxies))
@@ -335,7 +358,7 @@ func InitRoutes(container *UseCases, settings config.Settings) *chi.Mux {
 	apiRouter.Use(chimiddleware.GetHead)
 	apiRouter.Get("/healthz", GetHealth)
 	apiRouter.Mount("/v1", backend)
-	apiRouter.Mount("/static/uploadedImages", staticimages.NewHandler(container.OpenMediaUseCase))
+	apiRouter.Mount("/static/uploadedImages", staticimages.NewHandler(container.OpenMediaUseCase, container.ServeVariantUseCase))
 	apiRouter.Mount("/", frontend)

 	return apiRouter