122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
package handler
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import (
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"errors"
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"net/http"
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"git.yuntuo.hk/k2safe/go-omni"
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"git.yuntuo.hk/k2safe/go-omni/examples/reference/model"
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"git.yuntuo.hk/k2safe/go-omni/examples/reference/service"
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)
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type Users struct {
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service *service.Users
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}
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func NewUsers(service *service.Users) *Users {
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return &Users{service: service}
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}
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func (h *Users) RegisterRoutes(api *omni.RouterGroup, writeMiddleware, deleteMiddleware omni.Middleware) {
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users := api.Group("/users")
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users.POST("", h.Create, writeMiddleware)
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users.GET("", h.List)
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users.GET("/:id", h.Get)
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users.PUT("/:id", h.Update, writeMiddleware)
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users.DELETE("/:id", h.Delete, writeMiddleware, deleteMiddleware)
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}
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// HTTP-specific validation tags stay here, outside the business model.
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type userBody struct {
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Name string `json:"name" binding:"required,max=100"`
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Email string `json:"email" binding:"required,email,max=254"`
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}
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type userPath struct {
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ID int64 `uri:"id" binding:"gt=0"`
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}
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type listQuery struct {
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Page int `form:"page,default=1" binding:"gte=1"`
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PageSize int `form:"pageSize,default=20" binding:"gte=1,lte=100"`
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}
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func (h *Users) Create(ctx *omni.Context) error {
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var body userBody
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if err := ctx.BindJSON(&body); err != nil {
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return err
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}
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user, err := h.service.Create(ctx.Request().Context(), model.UserInput(body))
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if err != nil {
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return userError(err)
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}
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return ctx.Created(user)
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}
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func (h *Users) Get(ctx *omni.Context) error {
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var path userPath
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if err := ctx.BindURI(&path); err != nil {
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return err
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}
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user, err := h.service.Get(ctx.Request().Context(), path.ID)
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if err != nil {
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return userError(err)
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}
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return ctx.OK(user)
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}
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func (h *Users) List(ctx *omni.Context) error {
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var query listQuery
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if err := ctx.BindQuery(&query); err != nil {
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return err
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}
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page, err := h.service.List(ctx.Request().Context(), query.Page, query.PageSize)
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if err != nil {
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return userError(err)
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}
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return ctx.OK(page)
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}
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func (h *Users) Update(ctx *omni.Context) error {
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var path userPath
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if err := ctx.BindURI(&path); err != nil {
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return err
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}
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var body userBody
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if err := ctx.BindJSON(&body); err != nil {
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return err
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}
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user, err := h.service.Update(ctx.Request().Context(), path.ID, model.UserInput(body))
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if err != nil {
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return userError(err)
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}
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return ctx.OK(user)
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}
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func (h *Users) Delete(ctx *omni.Context) error {
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var path userPath
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if err := ctx.BindURI(&path); err != nil {
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return err
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}
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if err := h.service.Delete(ctx.Request().Context(), path.ID); err != nil {
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return userError(err)
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}
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return ctx.NoContent()
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}
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func userError(err error) error {
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switch {
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case errors.Is(err, model.ErrUserNotFound):
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return omni.NotFound("USER_NOT_FOUND", "user was not found").WithCause(err)
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case errors.Is(err, model.ErrEmailTaken):
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return omni.NewError(http.StatusConflict, "EMAIL_TAKEN", "email is already in use").WithCause(err)
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case errors.Is(err, model.ErrInvalidUser):
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return omni.BadRequest("INVALID_USER", "name or email is invalid").WithCause(err)
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case errors.Is(err, model.ErrInvalidPage):
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return omni.BadRequest("INVALID_QUERY", "pagination is invalid").WithCause(err)
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default:
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// GoOmni masks unexpected errors; internal details stay in server logs.
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return err
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}
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}
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