feat: Authors feature backend (and upgraded deprecated mods)

api/dependecyInjection.go

@@ -4,6 +4,7 @@ import (
 	domainAPIKey "RenewCMS/internal/domain/apikey"
 	domainArticle "RenewCMS/internal/domain/article"
 	domainAudit "RenewCMS/internal/domain/audit"
+	domainAuthor "RenewCMS/internal/domain/author"
 	domainImage "RenewCMS/internal/domain/image"
 	domainInvite "RenewCMS/internal/domain/invite"
 	domainMail "RenewCMS/internal/domain/mail"
@@ -48,6 +49,12 @@ type UseCases struct {
 	ListArticlesUseCase             *useCases.ListArticlesUseCase
 	UpdateArticleUseCase            *useCases.UpdateArticleUseCase
 	DeleteArticleUseCase            *useCases.DeleteArticleUseCase
+	ListAuthorsUseCase              *useCases.ListAuthorsUseCase
+	CreateAuthorUseCase             *useCases.CreateAuthorUseCase
+	CreateMyAuthorUseCase           *useCases.CreateMyAuthorUseCase
+	UpdateAuthorUseCase             *useCases.UpdateAuthorUseCase
+	DeleteAuthorUseCase             *useCases.DeleteAuthorUseCase
+	GetMyAuthorUseCase              *useCases.GetMyAuthorUseCase
 	ListSitesUseCase                *useCases.ListSitesUseCase
 	CreateSiteUseCase               *useCases.CreateSiteUseCase
 	UpdateSiteUseCase               *useCases.UpdateSiteUseCase
@@ -130,6 +137,7 @@ func (c *UseCases) RunSchedulers(ctx context.Context) {
 type Repositories struct {
 	ArticleRepo       domainArticle.Repository
 	SiteRepo          domainSite.Repository
+	AuthorRepo        domainAuthor.Repository
 	UserRepo          domainUser.Repository
 	ImageRepo         domainImage.Repository
 	VariantRepo       domainImage.VariantRepository
@@ -269,6 +277,7 @@ func getRepositories(connection *database.Connection, settings config.Settings)
 	return &Repositories{
 		ArticleRepo:       persistence.NewArticleRepository(db),
 		SiteRepo:          persistence.NewSiteRepository(db),
+		AuthorRepo:        persistence.NewAuthorRepository(db),
 		UserRepo:          persistence.NewUserRepository(db),
 		ImageRepo:         persistence.NewImageRepository(db),
 		VariantRepo:       persistence.NewVariantRepository(db),
@@ -301,9 +310,9 @@ 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, repos.VariantFileRepo, recorder, repos.SiteRepo)
+	mergeMedia := useCases.NewMergeMediaUseCase(repos.ImageRepo, repos.ArticleRepo, imageStorage, repos.VariantFileRepo, recorder, repos.SiteRepo, repos.AuthorRepo)
 
-	runPurge := useCases.NewRunPurgeUseCase(repos.ImageRepo, repos.ArticleRepo, mergeMedia, repos.PurgeSettingsRepo, time.Now, log.Default(), recorder, repos.SiteRepo)
+	runPurge := useCases.NewRunPurgeUseCase(repos.ImageRepo, repos.ArticleRepo, mergeMedia, repos.PurgeSettingsRepo, time.Now, log.Default(), recorder, repos.SiteRepo, repos.AuthorRepo)
 	purgeScheduler := useCases.NewPurgeSchedulerUseCase(repos.PurgeSettingsRepo, runPurge, recorder)
 	activityCleanup := useCases.NewCleanupActivityUseCase(repos.AuditRepo, repos.AuditSettingsRepo, recorder)
 
@@ -314,11 +323,17 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 		PurgeScheduler:                  scheduler.NewSystemRunner(purgeScheduler, log.Default()),
 		ActivityCleanupScheduler:        scheduler.NewSystemCleanupRunner(activityCleanup, log.Default()),
 		Token:                           jwtauth.New("HS256", []byte(settings.JWTSecret), nil),
-		CreateArticleUseCase:            useCases.NewCreateArticleUseCase(repos.ArticleRepo, renderer, recorder, repos.SiteRepo),
+		CreateArticleUseCase:            useCases.NewCreateArticleUseCase(repos.ArticleRepo, renderer, recorder, repos.SiteRepo, repos.AuthorRepo),
 		GetArticleUseCase:               useCases.NewGetArticleUseCase(repos.ArticleRepo, renderer),
 		ListArticlesUseCase:             useCases.NewListArticlesUseCase(repos.ArticleRepo, renderer, repos.SiteRepo),
-		UpdateArticleUseCase:            useCases.NewUpdateArticleUseCase(repos.ArticleRepo, renderer, recorder, repos.SiteRepo),
+		UpdateArticleUseCase:            useCases.NewUpdateArticleUseCase(repos.ArticleRepo, renderer, recorder, repos.SiteRepo, repos.AuthorRepo),
 		DeleteArticleUseCase:            useCases.NewDeleteArticleUseCase(repos.ArticleRepo, recorder),
+		ListAuthorsUseCase:              useCases.NewListAuthorsUseCase(repos.AuthorRepo, repos.UserRepo),
+		CreateAuthorUseCase:             useCases.NewCreateAuthorUseCase(repos.AuthorRepo, repos.UserRepo, repos.ImageRepo, recorder),
+		CreateMyAuthorUseCase:           useCases.NewCreateMyAuthorUseCase(repos.AuthorRepo, repos.UserRepo, recorder),
+		UpdateAuthorUseCase:             useCases.NewUpdateAuthorUseCase(repos.AuthorRepo, repos.UserRepo, repos.ImageRepo, recorder),
+		DeleteAuthorUseCase:             useCases.NewDeleteAuthorUseCase(repos.AuthorRepo, recorder),
+		GetMyAuthorUseCase:              useCases.NewGetMyAuthorUseCase(repos.AuthorRepo),
 		ListSitesUseCase:                useCases.NewListSitesUseCase(repos.SiteRepo),
 		CreateSiteUseCase:               useCases.NewCreateSiteUseCase(repos.SiteRepo, repos.ImageRepo, recorder),
 		UpdateSiteUseCase:               useCases.NewUpdateSiteUseCase(repos.SiteRepo, repos.ImageRepo, recorder),
@@ -342,14 +357,14 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 		SendMailUseCase:                 useCases.NewSendMailUseCase(repos.MailRepo),
 		CreateImageUseCase:              useCases.NewCreateImageUseCase(repos.ImageRepo, imageStorage, recorder),
 		OpenMediaUseCase:                useCases.NewOpenMediaUseCase(imageStorage),
-		ListMediaUseCase:                useCases.NewListMediaUseCase(repos.ImageRepo, repos.ArticleRepo, repos.UserRepo, repos.VariantFileRepo, repos.SiteRepo),
+		ListMediaUseCase:                useCases.NewListMediaUseCase(repos.ImageRepo, repos.ArticleRepo, repos.UserRepo, repos.VariantFileRepo, repos.SiteRepo, repos.AuthorRepo),
 		RenameMediaUseCase:              useCases.NewRenameMediaUseCase(repos.ImageRepo, recorder),
-		DeleteMediaUseCase:              useCases.NewDeleteMediaUseCase(repos.ImageRepo, imageStorage, repos.VariantFileRepo, recorder, repos.SiteRepo),
+		DeleteMediaUseCase:              useCases.NewDeleteMediaUseCase(repos.ImageRepo, imageStorage, repos.VariantFileRepo, recorder, repos.SiteRepo, repos.AuthorRepo),
 		MergeMediaUseCase:               mergeMedia,
 		GetMediaUsageUseCase:            useCases.NewGetMediaUsageUseCase(repos.ImageRepo, repos.ArticleRepo),
 		GetPurgeSettingsUseCase:         useCases.NewGetPurgeSettingsUseCase(repos.PurgeSettingsRepo),
 		UpdatePurgeSettingsUseCase:      useCases.NewUpdatePurgeSettingsUseCase(repos.PurgeSettingsRepo, time.Now),
-		PreviewPurgeUseCase:             useCases.NewPreviewPurgeUseCase(repos.ImageRepo, repos.ArticleRepo, repos.SiteRepo),
+		PreviewPurgeUseCase:             useCases.NewPreviewPurgeUseCase(repos.ImageRepo, repos.ArticleRepo, repos.SiteRepo, repos.AuthorRepo),
 		RunPurgeUseCase:                 runPurge,
 		GetSettingsUseCase:              useCases.NewGetSettingsUseCase(settings.Version),
 		GetUpdateStatusUseCase:          useCases.NewGetUpdateStatusUseCase(repos.UpdateStore, repos.UpdateJobs, repos.UpdateHelper, repos.UpdateResults, repos.RestartRequests, settings.Version, settings.Container, time.Now),
@@ -361,7 +376,7 @@ func getUseCases(repos *Repositories, imageStorage domainImage.Storage, settings
 		ListAPIKeysUseCase:              useCases.NewListAPIKeysUseCase(repos.APIKeyRepo, repos.UserRepo, time.Now),
 		RevokeAPIKeyUseCase:             useCases.NewRevokeAPIKeyUseCase(repos.APIKeyRepo, repos.UserRepo, time.Now, recorder),
 		AuthenticateAPIKeyUseCase:       useCases.NewAuthenticateAPIKeyUseCase(repos.APIKeyRepo, keyGenerator, repos.UserRepo, time.Now),
-		ListActivityUseCase:             useCases.NewListActivityUseCase(repos.AuditRepo, repos.UserRepo, repos.ArticleRepo, repos.ImageRepo, repos.APIKeyRepo, time.Now, repos.SiteRepo),
+		ListActivityUseCase:             useCases.NewListActivityUseCase(repos.AuditRepo, repos.UserRepo, repos.ArticleRepo, repos.ImageRepo, repos.APIKeyRepo, time.Now, repos.SiteRepo, repos.AuthorRepo),
 		GetActivitySummaryUseCase:       useCases.NewGetActivitySummaryUseCase(repos.AuditRepo, time.Now),
 		ExportActivityUseCase:           useCases.NewExportActivityUseCase(repos.AuditRepo, time.Now),
 		GetActivityRetentionUseCase:     useCases.NewGetActivityRetentionUseCase(repos.AuditSettingsRepo, repos.AuditRepo, time.Now),

api/handlers/activity/activityHandler.go

@@ -29,7 +29,7 @@ type Handler struct {
 type filterQuery struct {
 	Q        string `validate:"max=200"`
 	Actor    string `validate:"max=40"`
-	Category string `validate:"omitempty,oneof=articles media users api_keys auth system sites"`
+	Category string `validate:"omitempty,oneof=articles media users api_keys auth system sites authors"`
 	Outcome  string `validate:"omitempty,oneof=all success failed"`
 	Security string `validate:"omitempty,oneof=true"`
 	Range    string `validate:"omitempty,oneof=today 7d 30d all custom"`

api/handlers/article/articleHandler.go

@@ -5,6 +5,7 @@ import (
 	"RenewCMS/api/pkg/claims"
 	validator "RenewCMS/api/pkg/validator"
 	domain "RenewCMS/internal/domain/article"
+	"RenewCMS/internal/domain/author"
 	"RenewCMS/internal/domain/site"
 	"RenewCMS/internal/infrastructure/useCases"
 	"encoding/json"
@@ -53,6 +54,7 @@ type articleResponse struct {
 	BodyFormat domain.BodyFormat `json:"body_format"`
 	IsOnline   bool              `json:"is_online"`
 	SiteID     uint32            `json:"site_id"`
+	Authors    []author.Byline   `json:"authors"`
 	CreatedAt  time.Time         `json:"created_at"`
 	UpdatedAt  time.Time         `json:"updated_at"`
 }
@@ -66,6 +68,10 @@ func toArticleResponse(article domain.Article, format domain.BodyFormat) (articl
 		}
 		body = encoded
 	}
+	authors := article.Authors
+	if authors == nil {
+		authors = []author.Byline{}
+	}
 	return articleResponse{
 		ID:         article.ID,
 		Title:      article.Title,
@@ -73,6 +79,7 @@ func toArticleResponse(article domain.Article, format domain.BodyFormat) (articl
 		BodyFormat: format,
 		IsOnline:   article.IsOnline,
 		SiteID:     article.SiteID,
+		Authors:    authors,
 		CreatedAt:  article.CreatedAt,
 		UpdatedAt:  article.UpdatedAt,
 	}, nil
@@ -155,10 +162,12 @@ func (h *Handler) PostArticle(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	creatorId, _ := claims.UserId(r)
 	createdArticle, err := h.CreateUseCase.CreateArticle(r.Context(), useCases.CreateArticleCommand{
-		Title:  localArticle.Title,
-		Body:   localArticle.Body,
-		Format: format,
+		Title:     localArticle.Title,
+		Body:      localArticle.Body,
+		Format:    format,
+		CreatedBy: creatorId,
 	})
 	if err != nil {
 		if errors.Is(err, domain.ErrInvalidTitle) {
@@ -181,6 +190,10 @@ func writeArticleErrorResponse(w http.ResponseWriter, err error) {
 		http.Error(w, apperr.SiteNotFoundErrorMessage, http.StatusNotFound)
 		return
 	}
+	if errors.Is(err, author.ErrAuthorNotFound) {
+		http.Error(w, apperr.AuthorNotFoundErrorMessage, http.StatusNotFound)
+		return
+	}
 	http.Error(w, "Internal server error", http.StatusInternalServerError)
 }
 
@@ -221,11 +234,23 @@ func (h *Handler) setIsOnline(w http.ResponseWriter, r *http.Request, isOnline b
 }
 
 type UpdateArticleBody struct {
-	Body   *string `json:"body"`
-	SiteID *uint32 `json:"site_id" validate:"omitempty,gte=1"`
+	Body      *string   `json:"body"`
+	SiteID    *uint32   `json:"site_id" validate:"omitempty,gte=1"`
+	AuthorIDs *[]uint32 `json:"author_ids" validate:"omitempty,dive,gte=1"`
 }
 
-var updatableArticleFields = []string{"body", "site_id"}
+var updatableArticleFields = []string{"body", "site_id", "author_ids"}
+
+func hasDuplicates(ids []uint32) bool {
+	seen := make(map[uint32]bool, len(ids))
+	for _, id := range ids {
+		if seen[id] {
+			return true
+		}
+		seen[id] = true
+	}
+	return false
+}
 
 func readUpdateArticleBody(r *http.Request) (UpdateArticleBody, bool) {
 	raw, err := io.ReadAll(r.Body)
@@ -254,6 +279,9 @@ func readUpdateArticleBody(r *http.Request) (UpdateArticleBody, bool) {
 	if err := json.Unmarshal(raw, &request); err != nil {
 		return UpdateArticleBody{}, false
 	}
+	if request.AuthorIDs != nil && hasDuplicates(*request.AuthorIDs) {
+		return UpdateArticleBody{}, false
+	}
 	return request, true
 }
 
@@ -281,9 +309,10 @@ func (h *Handler) UpdateArticleBody(w http.ResponseWriter, r *http.Request) {
 	}
 
 	updatedArticle, err := h.UpdateUseCase.Update(r.Context(), id, useCases.UpdateArticleCommand{
-		Body:   request.Body,
-		SiteID: request.SiteID,
-		Format: format,
+		Body:      request.Body,
+		SiteID:    request.SiteID,
+		AuthorIDs: request.AuthorIDs,
+		Format:    format,
 	})
 	if err != nil {
 		writeArticleErrorResponse(w, err)

api/handlers/auth/meHandler.go

@@ -4,6 +4,7 @@ import (
 	"RenewCMS/api/pkg/apperr"
 	"RenewCMS/api/pkg/claims"
 	"RenewCMS/api/pkg/publicuser"
+	"RenewCMS/internal/domain/author"
 	"RenewCMS/internal/domain/user"
 	"RenewCMS/internal/infrastructure/useCases"
 	"encoding/json"
@@ -12,15 +13,34 @@ import (
 )
 
 type MeHandler struct {
-	GetUseCase *useCases.GetUserUseCase
+	GetUseCase       *useCases.GetUserUseCase
+	GetAuthorUseCase *useCases.GetMyAuthorUseCase
 }
 
-func NewMeHandler(getUser *useCases.GetUserUseCase) *MeHandler {
+func NewMeHandler(getUser *useCases.GetUserUseCase, getAuthor *useCases.GetMyAuthorUseCase) *MeHandler {
 	return &MeHandler{
-		GetUseCase: getUser,
+		GetUseCase:       getUser,
+		GetAuthorUseCase: getAuthor,
 	}
 }
 
+type meAuthor struct {
+	author.Byline
+	ArticleCount int `json:"article_count"`
+}
+
+type meResponse struct {
+	publicuser.PublicUser
+	Author *meAuthor `json:"author"`
+}
+
+func toMeAuthor(found *author.Author) *meAuthor {
+	if found == nil {
+		return nil
+	}
+	return &meAuthor{Byline: found.Byline(), ArticleCount: found.ArticleCount}
+}
+
 func (h *MeHandler) Me(w http.ResponseWriter, r *http.Request) {
 	userId, ok := claims.UserId(r)
 	if !ok {
@@ -38,7 +58,13 @@ func (h *MeHandler) Me(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	body, err := json.Marshal(publicuser.New(loadedUser))
+	linked, err := h.GetAuthorUseCase.Get(loadedUser.ID)
+	if err != nil {
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	body, err := json.Marshal(meResponse{PublicUser: publicuser.New(loadedUser), Author: toMeAuthor(linked)})
 	if err != nil {
 		http.Error(w, "Internal server error", http.StatusInternalServerError)
 		return

api/handlers/author/authorHandler.go

@@ -0,0 +1,389 @@
+package author
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	"RenewCMS/api/pkg/claims"
+	validator "RenewCMS/api/pkg/validator"
+	domain "RenewCMS/internal/domain/author"
+	"RenewCMS/internal/domain/image"
+	"RenewCMS/internal/domain/user"
+	"RenewCMS/internal/infrastructure/useCases"
+	"encoding/json"
+	"errors"
+	"io"
+	"log"
+	"net/http"
+	"net/url"
+	"strconv"
+
+	"github.com/go-chi/chi/v5"
+	playground "github.com/go-playground/validator/v10"
+)
+
+const (
+	defaultListPage = 1
+	defaultListSize = 25
+	reassignParam   = "reassign_to"
+	reassignNone    = "none"
+)
+
+type Handler struct {
+	ListUseCase     *useCases.ListAuthorsUseCase
+	CreateUseCase   *useCases.CreateAuthorUseCase
+	CreateMyUseCase *useCases.CreateMyAuthorUseCase
+	UpdateUseCase   *useCases.UpdateAuthorUseCase
+	DeleteUseCase   *useCases.DeleteAuthorUseCase
+	GetUserUseCase  *useCases.GetUserUseCase
+}
+
+func NewHandler(list *useCases.ListAuthorsUseCase, create *useCases.CreateAuthorUseCase, createMy *useCases.CreateMyAuthorUseCase, update *useCases.UpdateAuthorUseCase, deleteUseCase *useCases.DeleteAuthorUseCase, getUser *useCases.GetUserUseCase) *Handler {
+	return &Handler{ListUseCase: list, CreateUseCase: create, CreateMyUseCase: createMy, UpdateUseCase: update, DeleteUseCase: deleteUseCase, GetUserUseCase: getUser}
+}
+
+type socialLinkRequest struct {
+	Type string `json:"type" validate:"socialtype"`
+	URL  string `json:"url"`
+}
+
+func toLinks(requests []socialLinkRequest) []domain.SocialLink {
+	links := make([]domain.SocialLink, 0, len(requests))
+	for _, request := range requests {
+		links = append(links, domain.SocialLink{Type: request.Type, URL: request.URL})
+	}
+	return links
+}
+
+type PostAuthor struct {
+	Name        string              `json:"name" validate:"authorname"`
+	Slug        string              `json:"slug" validate:"omitempty,authorslug"`
+	Bio         string              `json:"bio"`
+	AvatarID    *uint32             `json:"avatar_id" validate:"omitempty,gte=1"`
+	Website     *string             `json:"website"`
+	SocialLinks []socialLinkRequest `json:"social_links" validate:"omitempty,dive"`
+	UserID      *uint32             `json:"user_id" validate:"omitempty,gte=1"`
+}
+
+type optional[T any] struct {
+	Set   bool
+	Value *T
+}
+
+func (o *optional[T]) UnmarshalJSON(data []byte) error {
+	o.Set = true
+	if string(data) == "null" {
+		o.Value = nil
+		return nil
+	}
+	var value T
+	if err := json.Unmarshal(data, &value); err != nil {
+		return err
+	}
+	o.Value = &value
+	return nil
+}
+
+type PatchAuthor struct {
+	Name        *string              `json:"name" validate:"authorname"`
+	Slug        *string              `json:"slug" validate:"authorslug"`
+	Bio         *string              `json:"bio"`
+	AvatarID    optional[uint32]     `json:"avatar_id"`
+	Website     optional[string]     `json:"website"`
+	SocialLinks *[]socialLinkRequest `json:"social_links" validate:"omitempty,dive"`
+	UserID      optional[uint32]     `json:"user_id"`
+}
+
+func (p PatchAuthor) toPatch() domain.Patch {
+	patch := domain.Patch{
+		Name:     p.Name,
+		Slug:     p.Slug,
+		Bio:      p.Bio,
+		AvatarID: domain.Nullable[uint32]{Set: p.AvatarID.Set, Value: p.AvatarID.Value},
+		Website:  domain.Nullable[string]{Set: p.Website.Set, Value: p.Website.Value},
+		UserID:   domain.Nullable[uint32]{Set: p.UserID.Set, Value: p.UserID.Value},
+	}
+	if p.SocialLinks != nil {
+		links := toLinks(*p.SocialLinks)
+		patch.SocialLinks = &links
+	}
+	return patch
+}
+
+var requiredNonNullFields = []string{"name", "slug", "bio", "social_links"}
+
+var nullableFields = []string{"avatar_id", "website", "user_id"}
+
+func readPatchAuthor(r *http.Request) (PatchAuthor, bool) {
+	raw, err := io.ReadAll(r.Body)
+	if err != nil {
+		return PatchAuthor{}, false
+	}
+	var fields map[string]json.RawMessage
+	if err := json.Unmarshal(raw, &fields); err != nil {
+		return PatchAuthor{}, false
+	}
+	known := 0
+	for _, name := range requiredNonNullFields {
+		value, present := fields[name]
+		if !present {
+			continue
+		}
+		if string(value) == "null" {
+			return PatchAuthor{}, false
+		}
+		known++
+	}
+	for _, name := range nullableFields {
+		if _, present := fields[name]; present {
+			known++
+		}
+	}
+	if known == 0 {
+		return PatchAuthor{}, false
+	}
+	var request PatchAuthor
+	if err := json.Unmarshal(raw, &request); err != nil {
+		return PatchAuthor{}, false
+	}
+	return request, true
+}
+
+func parseAuthorId(r *http.Request) (uint32, error) {
+	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
+	return uint32(id), err
+}
+
+func presentAuthor(a domain.Author) domain.Author {
+	if a.SocialLinks == nil {
+		a.SocialLinks = []domain.SocialLink{}
+	}
+	return a
+}
+
+func writeJSON(w http.ResponseWriter, status int, payload any) {
+	body, err := json.Marshal(payload)
+	if err != nil {
+		http.Error(w, "Failed to encode response", http.StatusInternalServerError)
+		return
+	}
+	if status != http.StatusOK {
+		w.WriteHeader(status)
+	}
+	if _, err := w.Write(body); err != nil {
+		log.Printf("Failed to write response: %v", err)
+	}
+}
+
+func writeAuthorError(w http.ResponseWriter, err error) {
+	switch {
+	case errors.Is(err, domain.ErrAuthorNotFound):
+		http.Error(w, apperr.AuthorNotFoundErrorMessage, http.StatusNotFound)
+	case errors.Is(err, domain.ErrSlugTaken):
+		http.Error(w, apperr.AuthorSlugTakenErrorMessage, http.StatusConflict)
+	case errors.Is(err, domain.ErrAuthorHasArticles):
+		http.Error(w, apperr.AuthorHasArticlesErrorMessage, http.StatusConflict)
+	case errors.Is(err, domain.ErrUserAlreadyLinked):
+		http.Error(w, apperr.UserAlreadyLinkedErrorMessage, http.StatusConflict)
+	case errors.Is(err, domain.ErrAuthorAlreadyLinked):
+		http.Error(w, apperr.AuthorAlreadyLinkedErrorMessage, http.StatusConflict)
+	case errors.Is(err, user.ErrUserNotFound):
+		http.Error(w, apperr.UserNotFoundErrorMessage, http.StatusNotFound)
+	case errors.Is(err, domain.ErrAuthorRights):
+		http.Error(w, apperr.AuthorRightsErrorMessage, http.StatusForbidden)
+	case errors.Is(err, domain.ErrBioTooLong):
+		http.Error(w, apperr.BioTooLongErrorMessage, http.StatusUnprocessableEntity)
+	case errors.Is(err, domain.ErrInvalidURL):
+		http.Error(w, apperr.InvalidURLErrorMessage, http.StatusUnprocessableEntity)
+	case errors.Is(err, domain.ErrTooManyLinks):
+		http.Error(w, apperr.TooManyLinksErrorMessage, http.StatusUnprocessableEntity)
+	case errors.Is(err, domain.ErrInvalidSocialType):
+		http.Error(w, apperr.InvalidSocialTypeErrorMessage, http.StatusBadRequest)
+	case errors.Is(err, domain.ErrInvalidSlug):
+		http.Error(w, apperr.InvalidSlugErrorMessage, http.StatusBadRequest)
+	case errors.Is(err, domain.ErrInvalidReassign):
+		http.Error(w, apperr.InvalidReassignErrorMessage, http.StatusBadRequest)
+	case errors.Is(err, image.ErrImageNotFound):
+		http.Error(w, apperr.AuthorImageNotFoundErrorMessage, http.StatusBadRequest)
+	default:
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+	}
+}
+
+func writeValidationError(w http.ResponseWriter, err error) {
+	var failures playground.ValidationErrors
+	if errors.As(err, &failures) {
+		for _, failure := range failures {
+			if failure.Tag() == validator.AuthorSlugTag {
+				http.Error(w, apperr.InvalidSlugErrorMessage, http.StatusBadRequest)
+				return
+			}
+		}
+	}
+	http.Error(w, err.Error(), http.StatusBadRequest)
+}
+
+func (h *Handler) currentUser(r *http.Request) (user.User, bool) {
+	userId, ok := claims.UserId(r)
+	if !ok {
+		return user.User{}, false
+	}
+	current, err := h.GetUserUseCase.GetUser(userId)
+	if err != nil {
+		return user.User{}, false
+	}
+	return current, true
+}
+
+type listQuery struct {
+	Page int    `validate:"gte=1"`
+	Size int    `validate:"oneof=5 25 50 100"`
+	Q    string `validate:"max=200"`
+}
+
+type listResponse struct {
+	Items []domain.Author `json:"items"`
+	Total int             `json:"total"`
+	Page  int             `json:"page"`
+	Size  int             `json:"size"`
+}
+
+func intQueryParam(values url.Values, name string, fallback int) (int, error) {
+	if !values.Has(name) {
+		return fallback, nil
+	}
+	return strconv.Atoi(values.Get(name))
+}
+
+func readListQuery(values url.Values) (listQuery, error) {
+	page, err := intQueryParam(values, "page", defaultListPage)
+	if err != nil {
+		return listQuery{}, err
+	}
+	size, err := intQueryParam(values, "size", defaultListSize)
+	if err != nil {
+		return listQuery{}, err
+	}
+	return listQuery{Page: page, Size: size, Q: values.Get("q")}, nil
+}
+
+func (h *Handler) List(w http.ResponseWriter, r *http.Request) {
+	query, err := readListQuery(r.URL.Query())
+	if err != nil || validator.Validate.Struct(query) != nil {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	current, _ := h.currentUser(r)
+	page, err := h.ListUseCase.List(useCases.ListAuthorsCommand{Q: query.Q, Page: query.Page, Size: query.Size, CallerRole: current.Role})
+	if err != nil {
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	items := make([]domain.Author, 0, len(page.Items))
+	for _, item := range page.Items {
+		items = append(items, presentAuthor(item))
+	}
+	writeJSON(w, http.StatusOK, listResponse{Items: items, Total: page.Total, Page: page.Page, Size: page.Size})
+}
+
+func (h *Handler) Create(w http.ResponseWriter, r *http.Request) {
+	var request PostAuthor
+	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+	if err := validator.Validate.Struct(request); err != nil {
+		writeValidationError(w, err)
+		return
+	}
+
+	created, err := h.CreateUseCase.Create(r.Context(), useCases.CreateAuthorCommand{
+		Name:        request.Name,
+		Slug:        request.Slug,
+		Bio:         request.Bio,
+		AvatarID:    request.AvatarID,
+		Website:     request.Website,
+		SocialLinks: toLinks(request.SocialLinks),
+		UserID:      request.UserID,
+	})
+	if err != nil {
+		writeAuthorError(w, err)
+		return
+	}
+	writeJSON(w, http.StatusCreated, presentAuthor(created))
+}
+
+func (h *Handler) CreateMine(w http.ResponseWriter, r *http.Request) {
+	userId, ok := claims.UserId(r)
+	if !ok {
+		http.Error(w, apperr.UnauthorizedErrorMessage, http.StatusUnauthorized)
+		return
+	}
+
+	created, err := h.CreateMyUseCase.Create(r.Context(), userId)
+	if err != nil {
+		writeAuthorError(w, err)
+		return
+	}
+	writeJSON(w, http.StatusCreated, presentAuthor(created))
+}
+
+func (h *Handler) Update(w http.ResponseWriter, r *http.Request) {
+	id, err := parseAuthorId(r)
+	if err != nil {
+		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	request, ok := readPatchAuthor(r)
+	if !ok {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+	if err := validator.Validate.Struct(request); err != nil {
+		writeValidationError(w, err)
+		return
+	}
+
+	current, ok := h.currentUser(r)
+	if !ok {
+		http.Error(w, apperr.UnauthorizedErrorMessage, http.StatusUnauthorized)
+		return
+	}
+	updated, err := h.UpdateUseCase.Update(r.Context(), id, useCases.AuthorCaller{UserID: current.ID, Role: current.Role}, request.toPatch())
+	if err != nil {
+		writeAuthorError(w, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, presentAuthor(updated))
+}
+
+func readReassignment(r *http.Request) useCases.Reassignment {
+	query := r.URL.Query()
+	if !query.Has(reassignParam) {
+		return useCases.Reassignment{Mode: useCases.ReassignAbsent}
+	}
+	value := query.Get(reassignParam)
+	if value == reassignNone {
+		return useCases.Reassignment{Mode: useCases.ReassignNone}
+	}
+	parsed, err := strconv.ParseUint(value, 10, 32)
+	if err != nil {
+		return useCases.Reassignment{Mode: useCases.ReassignMalformed}
+	}
+	return useCases.Reassignment{Mode: useCases.ReassignToAuthor, Destination: uint32(parsed)}
+}
+
+func (h *Handler) Delete(w http.ResponseWriter, r *http.Request) {
+	id, err := parseAuthorId(r)
+	if err != nil {
+		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
+		return
+	}
+
+	if err := h.DeleteUseCase.Delete(r.Context(), id, readReassignment(r)); err != nil {
+		writeAuthorError(w, err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}

api/handlers/media/mediaHandler.go

@@ -98,6 +98,7 @@ type usageResponse struct {
 type mergeResponse struct {
 	ArticlesUpdated int `json:"articles_updated"`
 	SitesUpdated    int `json:"sites_updated"`
+	AuthorsUpdated  int `json:"authors_updated"`
 	Merged          int `json:"merged"`
 }
 
@@ -353,7 +354,7 @@ func (h *Handler) Merge(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	writeJSON(w, http.StatusOK, mergeResponse{ArticlesUpdated: result.ArticlesUpdated, SitesUpdated: result.SitesUpdated, Merged: result.Merged})
+	writeJSON(w, http.StatusOK, mergeResponse{ArticlesUpdated: result.ArticlesUpdated, SitesUpdated: result.SitesUpdated, AuthorsUpdated: result.AuthorsUpdated, Merged: result.Merged})
 }
 
 func writeMergeError(w http.ResponseWriter, err error) {

api/handlers/media/purgeHandler.go

@@ -54,6 +54,7 @@ type purgeRunResponse struct {
 	Merged          int `json:"merged"`
 	ArticlesUpdated int `json:"articles_updated"`
 	SitesUpdated    int `json:"sites_updated"`
+	AuthorsUpdated  int `json:"authors_updated"`
 	FailedGroups    int `json:"failed_groups"`
 }
 
@@ -166,6 +167,7 @@ func (h *Handler) RunPurge(w http.ResponseWriter, r *http.Request) {
 		Merged:          result.Merged,
 		ArticlesUpdated: result.ArticlesUpdated,
 		SitesUpdated:    result.SitesUpdated,
+		AuthorsUpdated:  result.AuthorsUpdated,
 		FailedGroups:    result.FailedGroups,
 	})
 }

api/middleware/apiKey.go

@@ -12,7 +12,7 @@ import (
 	"time"
 
 	"github.com/go-chi/jwtauth/v5"
-	"github.com/lestrrat-go/jwx/v2/jwt"
+	"github.com/lestrrat-go/jwx/v3/jwt"
 )
 
 const bearerScheme = "bearer "

api/middleware/requireSignedIn.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 
 	"github.com/go-chi/jwtauth/v5"
-	"github.com/lestrrat-go/jwx/v2/jwt"
+	"github.com/lestrrat-go/jwx/v3/jwt"
 )
 
 func RequireSignedIn(next http.Handler) http.Handler {

api/pkg/apperr/messages.go

@@ -67,3 +67,17 @@ const InvalidLocaleErrorMessage = "invalid_locale"
 const SiteImageNotFoundErrorMessage = "image_not_found"
 const UseSetDefaultErrorMessage = "use_set_default"
 const InvalidReassignErrorMessage = "invalid_reassign"
+const InvalidSocialTypeErrorMessage = "invalid_social_type"
+
+const AuthorNotFoundErrorMessage = "author_not_found"
+const AuthorSlugTakenErrorMessage = "author_slug_taken"
+const AuthorHasArticlesErrorMessage = "author_has_articles"
+const UserAlreadyLinkedErrorMessage = "user_already_linked"
+const AuthorAlreadyLinkedErrorMessage = "author_already_linked"
+const UserNotFoundErrorMessage = "user_not_found"
+const AuthorRightsErrorMessage = "author_rights"
+const BioTooLongErrorMessage = "bio_too_long"
+const InvalidURLErrorMessage = "invalid_url"
+const TooManyLinksErrorMessage = "too_many_links"
+const InvalidSlugErrorMessage = "invalid_slug"
+const AuthorImageNotFoundErrorMessage = "image_not_found"

api/pkg/validator/validator.go

@@ -1,8 +1,10 @@
 package validator
 
 import (
+	"RenewCMS/internal/domain/author"
 	"RenewCMS/internal/domain/image"
 	"RenewCMS/internal/domain/site"
+	"reflect"
 	"regexp"
 
 	"github.com/go-playground/validator/v10"
@@ -12,6 +14,9 @@ const inviteEmailTag = "inviteemail"
 const variantNameTag = "variantname"
 const siteKeyTag = "sitekey"
 const siteNameTag = "sitename"
+const AuthorNameTag = "authorname"
+const AuthorSlugTag = "authorslug"
+const SocialTypeTag = "socialtype"
 
 var inviteEmailPattern = regexp.MustCompile(`^[^\s@]+@[^\s@.]+(\.[^\s@.]+)+$`)
 
@@ -23,6 +28,25 @@ func InitValidator() {
 	_ = Validate.RegisterValidation(variantNameTag, isVariantName)
 	_ = Validate.RegisterValidation(siteKeyTag, isSiteKey)
 	_ = Validate.RegisterValidation(siteNameTag, isSiteName)
+	_ = Validate.RegisterValidation(AuthorNameTag, isAuthorName, true)
+	_ = Validate.RegisterValidation(AuthorSlugTag, isAuthorSlug, true)
+	_ = Validate.RegisterValidation(SocialTypeTag, isSocialType, true)
+}
+
+func isAbsent(field validator.FieldLevel) bool {
+	return field.Field().Kind() == reflect.Ptr && field.Field().IsNil()
+}
+
+func isAuthorName(field validator.FieldLevel) bool {
+	return isAbsent(field) || author.IsValidName(field.Field().String())
+}
+
+func isSocialType(field validator.FieldLevel) bool {
+	return author.IsValidSocialType(field.Field().String())
+}
+
+func isAuthorSlug(field validator.FieldLevel) bool {
+	return isAbsent(field) || author.IsValidSlug(field.Field().String())
 }
 
 func isSiteKey(field validator.FieldLevel) bool {

api/router.go

@@ -5,6 +5,7 @@ import (
 	"RenewCMS/api/handlers/apikey"
 	"RenewCMS/api/handlers/article"
 	"RenewCMS/api/handlers/auth"
+	"RenewCMS/api/handlers/author"
 	"RenewCMS/api/handlers/frontend"
 	"RenewCMS/api/handlers/imagevariant"
 	"RenewCMS/api/handlers/media"
@@ -80,7 +81,7 @@ func NewAuthRouter(container *UseCases, isProduction bool, rateLimit config.Auth
 
 	loginHandler := auth.NewLoginHandler(container.Token, container.CreateUserUseCase, container.AuthenticateUserUseCase, isProduction)
 	verificationHandler := auth.NewVerificationHandler(container.VerifyUserUseCase, container.CancelRegistrationUseCase, isProduction)
-	meHandler := auth.NewMeHandler(container.GetUserUseCase)
+	meHandler := auth.NewMeHandler(container.GetUserUseCase, container.GetMyAuthorUseCase)
 	passwordResetHandler := auth.NewPasswordResetHandler(container.RequestPasswordResetUseCase, container.ResetPasswordUseCase)
 	acceptInviteHandler := auth.NewAcceptInviteHandler(container.GetInviteUseCase, container.AcceptInviteUseCase, container.Token, isProduction)
 
@@ -204,6 +205,38 @@ func NewSiteRouter(container *UseCases, trustedProxies []string) http.Handler {
 	return r
 }
 
+func NewAuthorRouter(container *UseCases, trustedProxies []string) http.Handler {
+	r := chi.NewRouter()
+
+	authorHandler := author.NewHandler(container.ListAuthorsUseCase, container.CreateAuthorUseCase, container.CreateMyAuthorUseCase, container.UpdateAuthorUseCase, container.DeleteAuthorUseCase, container.GetUserUseCase)
+
+	r.Group(func(r chi.Router) {
+		r.Use(jwtauth.Verifier(container.Token))
+		r.Use(container.apiKeyAuth())
+		r.Use(jwtauth.Authenticator(container.Token))
+		r.Use(middleware.RequireCurrentToken(container.GetUserUseCase))
+		r.Use(middleware.RequireVerifiedUser(container.GetUserUseCase))
+		r.Get("/", authorHandler.List)
+	})
+	r.Group(func(r chi.Router) {
+		r.Use(middleware.RequireSession)
+		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.Post("/me", authorHandler.CreateMine)
+		r.Patch("/{id}", authorHandler.Update)
+		r.Group(func(r chi.Router) {
+			r.Use(middleware.RequireOwnerOrAdmin(container.GetUserUseCase))
+			r.Post("/", authorHandler.Create)
+			r.Delete("/{id}", authorHandler.Delete)
+		})
+	})
+	return r
+}
+
 func NewActivityRouter(container *UseCases, trustedProxies []string) http.Handler {
 	r := chi.NewRouter()
 
@@ -352,6 +385,7 @@ func InitBackendRoutes(container *UseCases, settings config.Settings) *chi.Mux {
 	r.Mount("/user", NewUserRouter(container, settings.AuthRateLimit, settings.TrustedProxies))
 	r.Mount("/settings", NewSettingsRouter(container, settings.TrustedProxies))
 	r.Mount("/site", NewSiteRouter(container, settings.TrustedProxies))
+	r.Mount("/author", NewAuthorRouter(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))