540 lines
17 KiB
Go
540 lines
17 KiB
Go
package main
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import (
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"context"
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"encoding/json"
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"io"
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"log"
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"net/http"
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"strconv"
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"sync"
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"time"
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"git.k6n.net/go-cart-actor/pkg/actor"
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"git.k6n.net/go-cart-actor/pkg/cart"
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messages "git.k6n.net/go-cart-actor/proto/cart"
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"git.k6n.net/go-cart-actor/pkg/voucher"
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"github.com/matst80/go-redis-inventory/pkg/inventory"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"go.opentelemetry.io/contrib/bridges/otelslog"
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"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
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"google.golang.org/protobuf/proto"
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"google.golang.org/protobuf/types/known/anypb"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/metric"
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"go.opentelemetry.io/otel/trace"
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)
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var (
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grainMutations = promauto.NewCounter(prometheus.CounterOpts{
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Name: "cart_grain_mutations_total",
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Help: "The total number of mutations",
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})
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grainLookups = promauto.NewCounter(prometheus.CounterOpts{
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Name: "cart_grain_lookups_total",
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Help: "The total number of lookups",
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})
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)
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type PoolServer struct {
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actor.GrainPool[*cart.CartGrain]
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pod_name string
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inventoryService inventory.InventoryService
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reservationService inventory.CartReservationService
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}
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func NewPoolServer(pool actor.GrainPool[*cart.CartGrain], pod_name string, inventoryService inventory.InventoryService, inventoryReservationService inventory.CartReservationService) *PoolServer {
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srv := &PoolServer{
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GrainPool: pool,
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pod_name: pod_name,
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inventoryService: inventoryService,
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reservationService: inventoryReservationService,
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}
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return srv
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}
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func (s *PoolServer) ApplyLocal(ctx context.Context, id cart.CartId, mutation ...proto.Message) (*actor.MutationResult[*cart.CartGrain], error) {
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return s.Apply(ctx, uint64(id), mutation...)
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}
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func (s *PoolServer) GetCartHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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grain, err := s.Get(r.Context(), uint64(id))
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if err != nil {
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return err
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}
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return s.WriteResult(w, grain)
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}
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func (s *PoolServer) AddSkuToCartHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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sku := r.PathValue("sku")
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msg, err := GetItemAddMessage(r.Context(), sku, 1, getCountryFromHost(r.Host), nil)
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if err != nil {
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return err
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}
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data, err := s.ApplyLocal(r.Context(), id, msg)
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if err != nil {
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return err
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}
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grainMutations.Add(float64(len(data.Mutations)))
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return s.WriteResult(w, data)
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}
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func (s *PoolServer) WriteResult(w http.ResponseWriter, result any) error {
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w.Header().Set("Content-Type", "application/json")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("X-Pod-Name", s.pod_name)
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if result == nil {
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w.WriteHeader(http.StatusInternalServerError)
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return nil
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}
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w.WriteHeader(http.StatusOK)
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enc := json.NewEncoder(w)
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err := enc.Encode(result)
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return err
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}
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func (s *PoolServer) DeleteItemHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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itemIdString := r.PathValue("itemId")
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itemId, err := strconv.ParseInt(itemIdString, 10, 64)
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if err != nil {
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return err
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}
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data, err := s.ApplyLocal(r.Context(), id, &messages.RemoveItem{Id: uint32(itemId)})
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if err != nil {
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return err
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}
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return s.WriteResult(w, data)
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}
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func (s *PoolServer) QuantityChangeHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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changeQuantity := messages.ChangeQuantity{}
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err := json.NewDecoder(r.Body).Decode(&changeQuantity)
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if err != nil {
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), id, &changeQuantity)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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type Item struct {
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Sku string `json:"sku"`
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Quantity int `json:"quantity"`
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StoreId *string `json:"storeId,omitempty"`
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}
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type SetCartItems struct {
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Country string `json:"country"`
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Items []Item `json:"items"`
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}
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func getMultipleAddMessages(ctx context.Context, items []Item, country string) []proto.Message {
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wg := sync.WaitGroup{}
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mu := sync.Mutex{}
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msgs := make([]proto.Message, 0, len(items))
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for _, itm := range items {
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wg.Go(
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func() {
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msg, err := GetItemAddMessage(ctx, itm.Sku, itm.Quantity, country, itm.StoreId)
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if err != nil {
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log.Printf("error adding item %s: %v", itm.Sku, err)
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return
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}
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mu.Lock()
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msgs = append(msgs, msg)
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mu.Unlock()
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})
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}
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wg.Wait()
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return msgs
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}
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func (s *PoolServer) SetCartItemsHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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setCartItems := SetCartItems{}
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err := json.NewDecoder(r.Body).Decode(&setCartItems)
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if err != nil {
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return err
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}
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msgs := make([]proto.Message, 0, len(setCartItems.Items)+1)
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msgs = append(msgs, &messages.ClearCartRequest{})
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msgs = append(msgs, getMultipleAddMessages(r.Context(), setCartItems.Items, setCartItems.Country)...)
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reply, err := s.ApplyLocal(r.Context(), id, msgs...)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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func (s *PoolServer) AddMultipleItemHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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setCartItems := SetCartItems{}
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err := json.NewDecoder(r.Body).Decode(&setCartItems)
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if err != nil {
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return err
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}
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msgs := getMultipleAddMessages(r.Context(), setCartItems.Items, setCartItems.Country)
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reply, err := s.ApplyLocal(r.Context(), id, msgs...)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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type AddRequest struct {
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Sku string `json:"sku"`
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Quantity int32 `json:"quantity"`
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Country string `json:"country"`
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StoreId *string `json:"storeId"`
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}
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func (s *PoolServer) GetReservationTime(item *messages.AddItem) time.Duration {
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// TODO: Implement reservation time calculation, nil don't require reservation
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return time.Minute * 15
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}
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func (s *PoolServer) AddSkuRequestHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
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addRequest := AddRequest{Quantity: 1}
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err := json.NewDecoder(r.Body).Decode(&addRequest)
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if err != nil {
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return err
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}
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msg, err := GetItemAddMessage(r.Context(), addRequest.Sku, int(addRequest.Quantity), addRequest.Country, addRequest.StoreId)
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if err != nil {
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), id, msg)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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// func (s *PoolServer) HandleConfirmation(w http.ResponseWriter, r *http.Request, id CartId) error {
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// orderId := r.PathValue("orderId")
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// if orderId == "" {
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// return fmt.Errorf("orderId is empty")
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// }
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// order, err := KlarnaInstance.GetOrder(orderId)
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// if err != nil {
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// return err
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// }
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// w.Header().Set("Content-Type", "application/json")
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// w.Header().Set("X-Pod-Name", s.pod_name)
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// w.Header().Set("Cache-Control", "no-cache")
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// w.Header().Set("Access-Control-Allow-Origin", "*")
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// w.WriteHeader(http.StatusOK)
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// return json.NewEncoder(w).Encode(order)
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// }
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// func (s *PoolServer) HandleCheckout(w http.ResponseWriter, r *http.Request, id CartId) error {
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// klarnaOrder, err := s.CreateOrUpdateCheckout(r.Host, id)
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// if err != nil {
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// return err
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// }
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// s.ApplyCheckoutStarted(klarnaOrder, id)
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// w.Header().Set("Content-Type", "application/json")
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// return json.NewEncoder(w).Encode(klarnaOrder)
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// }
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//
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// Removed leftover legacy block after CookieCartIdHandler (obsolete code referencing cid/legacy)
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func (s *PoolServer) RemoveCartCookie(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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// Clear cart cookie (breaking change: do not issue a new legacy id here)
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http.SetCookie(w, &http.Cookie{
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Name: "cartid",
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Value: "",
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Path: "/",
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Secure: r.TLS != nil,
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HttpOnly: true,
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Expires: time.Unix(0, 0),
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SameSite: http.SameSiteLaxMode,
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})
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w.WriteHeader(http.StatusOK)
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return nil
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}
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func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error) func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
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return func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
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if ownerHost, ok := s.OwnerHost(uint64(cartId)); ok {
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ctx, span := tracer.Start(r.Context(), "proxy")
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defer span.End()
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span.SetAttributes(attribute.String("cartid", cartId.String()))
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hostAttr := attribute.String("other host", ownerHost.Name())
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span.SetAttributes(hostAttr)
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logger.InfoContext(ctx, "cart proxyed", "result", ownerHost.Name())
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proxyCalls.Add(ctx, 1, metric.WithAttributes(hostAttr))
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handled, err := ownerHost.Proxy(uint64(cartId), w, r, nil)
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grainLookups.Inc()
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if err == nil && handled {
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return nil
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}
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}
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_, span := tracer.Start(r.Context(), "own")
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span.SetAttributes(attribute.String("cartid", cartId.String()))
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defer span.End()
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return fn(w, r, cartId)
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}
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}
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var (
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tracer = otel.Tracer(name)
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meter = otel.Meter(name)
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logger = otelslog.NewLogger(name)
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proxyCalls metric.Int64Counter
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)
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func init() {
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var err error
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proxyCalls, err = meter.Int64Counter("proxy.calls",
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metric.WithDescription("Number of proxy calls"),
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metric.WithUnit("{calls}"))
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if err != nil {
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panic(err)
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}
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}
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type AddVoucherRequest struct {
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VoucherCode string `json:"code"`
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}
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func (s *PoolServer) AddVoucherHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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data := &AddVoucherRequest{}
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json.NewDecoder(r.Body).Decode(data)
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v := voucher.Service{}
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msg, err := v.GetVoucher(data.VoucherCode)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, msg)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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s.WriteResult(w, reply)
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return nil
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}
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type SubscriptionDetailsRequest struct {
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Id *string `json:"id,omitempty"`
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OfferingCode string `json:"offeringCode,omitempty"`
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SigningType string `json:"signingType,omitempty"`
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Data json.RawMessage `json:"data,omitempty"`
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}
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func (sd *SubscriptionDetailsRequest) ToMessage() *messages.UpsertSubscriptionDetails {
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return &messages.UpsertSubscriptionDetails{
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Id: sd.Id,
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OfferingCode: sd.OfferingCode,
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SigningType: sd.SigningType,
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Data: &anypb.Any{Value: sd.Data},
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}
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}
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func (s *PoolServer) SubscriptionDetailsHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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data := &SubscriptionDetailsRequest{}
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err := json.NewDecoder(r.Body).Decode(data)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, data.ToMessage())
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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s.WriteResult(w, reply)
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return nil
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}
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func (s *PoolServer) RemoveVoucherHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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idStr := r.PathValue("voucherId")
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id, err := strconv.ParseInt(idStr, 10, 64)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, &messages.RemoveVoucher{Id: uint32(id)})
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(err.Error()))
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return err
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}
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s.WriteResult(w, reply)
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return nil
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}
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func (s *PoolServer) SetUserIdHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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setUserId := messages.SetUserId{}
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err := json.NewDecoder(r.Body).Decode(&setUserId)
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if err != nil {
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, &setUserId)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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func (s *PoolServer) LineItemMarkingHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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itemIdStr := r.PathValue("itemId")
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itemId, err := strconv.ParseInt(itemIdStr, 10, 64)
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if err != nil {
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return err
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}
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lineItemMarking := messages.LineItemMarking{Id: uint32(itemId)}
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err = json.NewDecoder(r.Body).Decode(&lineItemMarking)
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if err != nil {
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, &lineItemMarking)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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func (s *PoolServer) RemoveLineItemMarkingHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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itemIdStr := r.PathValue("itemId")
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itemId, err := strconv.ParseInt(itemIdStr, 10, 64)
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if err != nil {
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return err
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}
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removeLineItemMarking := messages.RemoveLineItemMarking{Id: uint32(itemId)}
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reply, err := s.ApplyLocal(r.Context(), cartId, &removeLineItemMarking)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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func (s *PoolServer) InternalApplyMutationHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
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if r.Method != http.MethodPost {
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w.WriteHeader(http.StatusMethodNotAllowed)
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return nil
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}
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data, err := io.ReadAll(r.Body)
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if err != nil {
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return err
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}
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mutation := &messages.Mutation{}
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err = proto.Unmarshal(data, mutation)
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if err != nil {
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return err
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}
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reply, err := s.ApplyLocal(r.Context(), cartId, mutation)
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if err != nil {
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return err
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}
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return s.WriteResult(w, reply)
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}
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func (s *PoolServer) GetAnywhere(ctx context.Context, cartId cart.CartId) (*cart.CartGrain, error) {
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id := uint64(cartId)
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if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
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grain := &cart.CartGrain{}
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err := host.Get(ctx, id, grain)
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return grain, err
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}
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return s.Get(ctx, id)
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}
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func (s *PoolServer) ApplyAnywhere(ctx context.Context, cartId cart.CartId, msgs ...proto.Message) error {
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id := uint64(cartId)
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if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
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_, err := host.Apply(ctx, id, msgs...)
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return err
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}
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_, err := s.Apply(ctx, id, msgs...)
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return err
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}
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func (s *PoolServer) Serve(mux *http.ServeMux) {
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// mux.HandleFunc("OPTIONS /cart", func(w http.ResponseWriter, r *http.Request) {
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// w.Header().Set("Access-Control-Allow-Origin", "*")
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// w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, POST, DELETE")
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// w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
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// w.WriteHeader(http.StatusOK)
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// })
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handleFunc := func(pattern string, handlerFunc func(http.ResponseWriter, *http.Request)) {
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attr := attribute.String("http.route", pattern)
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mux.HandleFunc(pattern, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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span := trace.SpanFromContext(r.Context())
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span.SetName(pattern)
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span.SetAttributes(attr)
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labeler, _ := otelhttp.LabelerFromContext(r.Context())
|
|
labeler.Add(attr)
|
|
|
|
handlerFunc(w, r)
|
|
}))
|
|
}
|
|
|
|
handleFunc("GET /cart", CookieCartIdHandler(s.ProxyHandler(s.GetCartHandler)))
|
|
handleFunc("GET /cart/add/{sku}", CookieCartIdHandler(s.ProxyHandler(s.AddSkuToCartHandler)))
|
|
handleFunc("POST /cart/add", CookieCartIdHandler(s.ProxyHandler(s.AddMultipleItemHandler)))
|
|
handleFunc("POST /cart", CookieCartIdHandler(s.ProxyHandler(s.AddSkuRequestHandler)))
|
|
handleFunc("POST /cart/set", CookieCartIdHandler(s.ProxyHandler(s.SetCartItemsHandler)))
|
|
handleFunc("DELETE /cart/{itemId}", CookieCartIdHandler(s.ProxyHandler(s.DeleteItemHandler)))
|
|
handleFunc("PUT /cart", CookieCartIdHandler(s.ProxyHandler(s.QuantityChangeHandler)))
|
|
handleFunc("DELETE /cart", CookieCartIdHandler(s.ProxyHandler(s.RemoveCartCookie)))
|
|
handleFunc("PUT /cart/voucher", CookieCartIdHandler(s.ProxyHandler(s.AddVoucherHandler)))
|
|
handleFunc("PUT /cart/subscription-details", CookieCartIdHandler(s.ProxyHandler(s.SubscriptionDetailsHandler)))
|
|
handleFunc("DELETE /cart/voucher/{voucherId}", CookieCartIdHandler(s.ProxyHandler(s.RemoveVoucherHandler)))
|
|
handleFunc("PUT /cart/user", CookieCartIdHandler(s.ProxyHandler(s.SetUserIdHandler)))
|
|
|
|
handleFunc("PUT /cart/item/{itemId}/marking", CookieCartIdHandler(s.ProxyHandler(s.LineItemMarkingHandler)))
|
|
handleFunc("DELETE /cart/item/{itemId}/marking", CookieCartIdHandler(s.ProxyHandler(s.RemoveLineItemMarkingHandler)))
|
|
|
|
//mux.HandleFunc("GET /cart/checkout", CookieCartIdHandler(s.ProxyHandler(s.HandleCheckout)))
|
|
//mux.HandleFunc("GET /cart/confirmation/{orderId}", CookieCartIdHandler(s.ProxyHandler(s.HandleConfirmation)))
|
|
|
|
handleFunc("GET /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.GetCartHandler)))
|
|
|
|
handleFunc("POST /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.AddSkuRequestHandler)))
|
|
handleFunc("DELETE /cart/byid/{id}/{itemId}", CartIdHandler(s.ProxyHandler(s.DeleteItemHandler)))
|
|
handleFunc("PUT /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.QuantityChangeHandler)))
|
|
handleFunc("PUT /cart/byid/{id}/voucher", CookieCartIdHandler(s.ProxyHandler(s.AddVoucherHandler)))
|
|
handleFunc("DELETE /cart/byid/{id}/voucher/{voucherId}", CookieCartIdHandler(s.ProxyHandler(s.RemoveVoucherHandler)))
|
|
handleFunc("PUT /cart/byid/{id}/user", CartIdHandler(s.ProxyHandler(s.SetUserIdHandler)))
|
|
handleFunc("PUT /cart/byid/{id}/item/{itemId}/marking", CartIdHandler(s.ProxyHandler(s.LineItemMarkingHandler)))
|
|
handleFunc("DELETE /cart/byid/{id}/item/{itemId}/marking", CartIdHandler(s.ProxyHandler(s.RemoveLineItemMarkingHandler)))
|
|
}
|