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endpoints.go
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endpoints.go
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package unitsvc
import (
"context"
"net/url"
"strings"
"github.com/go-kit/kit/endpoint"
httptransport "github.com/go-kit/kit/transport/http"
"github.com/google/uuid"
"github.com/studiously/introspector"
"github.com/studiously/unitsvc/models"
)
type Endpoints struct {
ListUnitsEndpoint endpoint.Endpoint
GetUnitEndpoint endpoint.Endpoint
CreateUnitEndpoint endpoint.Endpoint
RenameUnitEndpoint endpoint.Endpoint
DeleteUnitEndpoint endpoint.Endpoint
}
func MakeServerEndpoints(s Service) Endpoints {
return Endpoints{
ListUnitsEndpoint: MakeListUnitsEndpoint(s),
GetUnitEndpoint: MakeGetUnitEndpoint(s),
CreateUnitEndpoint: MakeCreateUnitEndpoint(s),
RenameUnitEndpoint: MakeRenameUnitEndpoint(s),
DeleteUnitEndpoint: MakeDeleteUnitEndpoint(s),
}
}
func MakeClientEndpoints(instance string) (Endpoints, error) {
if !strings.HasPrefix(instance, "http") {
instance = "http://" + instance
}
tgt, err := url.Parse(instance)
if err != nil {
return Endpoints{}, err
}
tgt.Path = ""
options := []httptransport.ClientOption{
httptransport.ClientBefore(introspector.FromHTTPContext()),
}
return Endpoints{
ListUnitsEndpoint: httptransport.NewClient("GET", tgt, EncodeListUnitsRequest, DecodeListUnitsResponse, options...).Endpoint(),
GetUnitEndpoint: httptransport.NewClient("GET", tgt, EncodeGetUnitRequest, DecodeGetUnitResponse, options...).Endpoint(),
CreateUnitEndpoint: httptransport.NewClient("POST", tgt, EncodeCreateUnitRequest, DecodeCreateUnitResponse, options...).Endpoint(),
RenameUnitEndpoint: httptransport.NewClient("PATCH", tgt, EncodeRenameUnitRequest, DecodeRenameUnitResponse, options...).Endpoint(),
DeleteUnitEndpoint: httptransport.NewClient("DELETE", tgt, EncodeDeleteUnitRequest, DecodeDeleteUnitResponse, options...).Endpoint(),
}, nil
}
func (e Endpoints) ListUnits(ctx context.Context, classID uuid.UUID) ([]uuid.UUID, error) {
request := listUnitsRequest{ClassID: classID}
response, err := e.ListUnitsEndpoint(ctx, request)
if err != nil {
return nil, err
}
resp := response.(listUnitsResponse)
return resp.Units, resp.Error
}
func (e Endpoints) GetUnit(ctx context.Context, unitID uuid.UUID) (*models.Unit, error) {
request := getUnitRequest{UnitID: unitID}
response, err := e.GetUnitEndpoint(ctx, request)
if err != nil {
return nil, err
}
resp := response.(getUnitResponse)
return resp.Unit, resp.Error
}
func (e Endpoints) CreateUnit(ctx context.Context, classID uuid.UUID, title string) error {
request := createUnitRequest{ClassID: classID, Title: title}
response, err := e.CreateUnitEndpoint(ctx, request)
if err != nil {
return err
}
resp := response.(createUnitResponse)
return resp.Error
}
func (e Endpoints) RenameUnit(ctx context.Context, unitID uuid.UUID, title string) error {
request := renameUnitRequest{UnitID: unitID, Title: title}
response, err := e.RenameUnitEndpoint(ctx, request)
if err != nil {
return err
}
resp := response.(renameUnitResponse)
return resp.Error
}
func (e Endpoints) DeleteUnit(ctx context.Context, unitID uuid.UUID) error {
request := deleteUnitRequest{UnitID: unitID}
response, err := e.DeleteUnitEndpoint(ctx, request)
if err != nil {
return err
}
resp := response.(deleteUnitResponse)
return resp.Error
}
func MakeListUnitsEndpoint(s Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req := request.(listUnitsRequest)
units, e := s.ListUnits(ctx, req.ClassID)
return listUnitsResponse{units, e}, nil
}
}
type listUnitsRequest struct {
ClassID uuid.UUID `json:"class_id"`
}
type listUnitsResponse struct {
Units []uuid.UUID `json:"units,omitempty"`
Error error `json:"error,omitempty"`
}
func (r listUnitsResponse) error() error {
return r.Error
}
func MakeGetUnitEndpoint(s Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req := request.(getUnitRequest)
unit, e := s.GetUnit(ctx, req.UnitID)
return getUnitResponse{unit, e}, nil
}
}
type getUnitRequest struct {
UnitID uuid.UUID `json:"unit_id"`
}
type getUnitResponse struct {
Unit *models.Unit `json:"unit,omitempty"`
Error error `json:"error,omitempty"`
}
func (r getUnitResponse) error() error {
return r.Error
}
func MakeCreateUnitEndpoint(s Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req := request.(createUnitRequest)
e := s.CreateUnit(ctx, req.ClassID, req.Title)
return createUnitResponse{e}, nil
}
}
type createUnitRequest struct {
ClassID uuid.UUID `json:"class_id"`
Title string `json:"title"`
}
type createUnitResponse struct {
Error error `json:"error,omitempty"`
}
func (r createUnitResponse) error() error {
return r.Error
}
func MakeRenameUnitEndpoint(s Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req := request.(renameUnitRequest)
e := s.RenameUnit(ctx, req.UnitID, req.Title)
return renameUnitResponse{e}, nil
}
}
type renameUnitRequest struct {
UnitID uuid.UUID `json:"unit_id"`
Title string `json:"title"`
}
type renameUnitResponse struct {
Error error `json:"error,omitempty"`
}
func (r renameUnitResponse) error() error {
return r.Error
}
func MakeDeleteUnitEndpoint(s Service) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (response interface{}, err error) {
req := request.(deleteUnitRequest)
e := s.DeleteUnit(ctx, req.UnitID)
return deleteUnitResponse{e}, nil
}
}
type deleteUnitRequest struct {
UnitID uuid.UUID `json:"unit_id"`
}
type deleteUnitResponse struct {
Error error `json:"error,omitempty"`
}
func (r deleteUnitResponse) error() error {
return r.Error
}