112 lines
2.3 KiB
Go
112 lines
2.3 KiB
Go
package main
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import (
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"encoding/gob"
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"encoding/json"
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"log"
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"net/http"
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"os"
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"time"
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)
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func spawn(id string) Grain {
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ret := &CartGrain{
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Id: id,
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Items: []CartItem{},
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storageMessages: []Message{},
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TotalPrice: 0,
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}
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err := loadMessages(ret, id)
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if err != nil {
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log.Printf("Error loading messages for grain %s: %v\n", id, err)
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}
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return ret
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}
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func init() {
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os.Mkdir("data", 0755)
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gob.Register(CartItem{})
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gob.Register(Message{})
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}
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type App struct {
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pool *GrainLocalPool
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storage *DiskStorage
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}
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func (a *App) HandleGet(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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grain, err := a.pool.GetOrSpawn(id, spawn)
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if err != nil {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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json.NewEncoder(w).Encode(grain)
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}
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func (a *App) HandleAddSku(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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sku := r.PathValue("sku")
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grain, err := a.pool.GetOrSpawn(id, spawn)
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if err != nil {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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message := &Message{
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Type: "add",
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Content: sku,
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}
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var reply CartGrain
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err = grain.HandleMessage(message, false, &reply)
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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
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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json.NewEncoder(w).Encode(reply)
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}
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func (a *App) Save() error {
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for id, grain := range a.pool.GetGrains() {
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err := a.storage.Store(id, grain)
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if err != nil {
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log.Printf("Error saving grain %s: %v\n", id, err)
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}
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}
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return a.storage.saveState()
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}
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func (a *App) HandleSave(w http.ResponseWriter, r *http.Request) {
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err := a.Save()
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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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} else {
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w.WriteHeader(http.StatusCreated)
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}
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}
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func main() {
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// Create a new instance of the server
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storage, err := NewDiskStorage("data/state.json")
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if err != nil {
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log.Printf("Error loading state: %v\n", err)
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}
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app := &App{
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pool: NewGrainLocalPool(1000, 5*time.Minute),
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storage: storage,
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}
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mux := http.NewServeMux()
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mux.HandleFunc("GET /{id}", app.HandleGet)
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mux.HandleFunc("GET /{id}/add/{sku}", app.HandleAddSku)
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mux.HandleFunc("GET /save", app.HandleSave)
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http.ListenAndServe(":8080", mux)
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}
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