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profile.go
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profile.go
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package http
import (
"context"
"github.com/go-chi/chi"
"github.com/go-kit/kit/endpoint"
validation "github.com/go-ozzo/ozzo-validation/v4"
realworld "github.com/xesina/gokit-realworld"
httpError "github.com/xesina/gokit-realworld/http/error"
"github.com/xesina/gokit-realworld/http/middleware"
"github.com/xesina/gokit-realworld/user"
"net/http"
)
type profileRequest struct {
username string
viewerID int64
}
func (req *profileRequest) bind(r *http.Request) error {
// TODO: handle unexpected errors
// TODO: move this to a middleware so inject the ID to the context directly
tk, claims, err := middleware.FromContext(r.Context())
if err != nil {
return err
}
if tk != nil {
viewerID := claims["id"].(float64)
req.viewerID = int64(viewerID)
}
username := chi.URLParam(r, "username")
req.username = username
if err := req.validate(); err != nil {
return err
}
return nil
}
func (req *profileRequest) validate() error {
return validation.ValidateStruct(
req,
validation.Field(&req.username, validation.Required, validation.Length(4, 50)),
validation.Field(&req.viewerID, validation.Min(1)),
)
}
func (req *profileRequest) endpointRequest() user.ProfileRequest {
return user.ProfileRequest{
Username: req.username,
ViewerID: req.viewerID,
}
}
type profile struct {
Username string `json:"username"`
Bio realworld.Bio `json:"bio"`
Image realworld.Image `json:"image"`
Following bool `json:"following"`
}
type profileResponse struct {
Profile profile `json:"profile"`
}
func newProfileResponse(u *user.ProfileResponse) profileResponse {
return profileResponse{
Profile: profile{
Username: u.Username,
Bio: u.Bio,
Image: u.Image,
Following: u.Following,
},
}
}
func (h UserHandler) decodeProfileRequest(_ context.Context, r *http.Request) (request interface{}, err error) {
var req profileRequest
if err := req.bind(r); err != nil {
return nil, err
}
er := req.endpointRequest()
return er, nil
}
func (h UserHandler) encodeProfileResponse(ctx context.Context, w http.ResponseWriter, response interface{}) error {
if resp, ok := response.(endpoint.Failer); ok && resp.Failed() != nil {
httpError.EncodeError(ctx, resp.Failed(), w)
return nil
}
e := response.(user.ProfileResponse)
hresp := newProfileResponse(&e)
return jsonResponse(w, hresp, http.StatusOK)
}