checkout backoffice

cmd/backoffice/fileserver.go

@@ -18,19 +18,24 @@ import (
 
 	"git.k6n.net/go-cart-actor/pkg/actor"
 	"git.k6n.net/go-cart-actor/pkg/cart"
+	"git.k6n.net/go-cart-actor/pkg/checkout"
 	"google.golang.org/protobuf/proto"
 )
 
 type FileServer struct {
 	// Define fields here
-	dataDir string
-	storage actor.LogStorage[cart.CartGrain]
+	dataDir         string
+	checkoutDataDir string
+	storage         actor.LogStorage[cart.CartGrain]
+	checkoutStorage actor.LogStorage[checkout.CheckoutGrain]
 }
 
-func NewFileServer(dataDir string, storage actor.LogStorage[cart.CartGrain]) *FileServer {
+func NewFileServer(dataDir string, checkoutDataDir string, storage actor.LogStorage[cart.CartGrain], checkoutStorage actor.LogStorage[checkout.CheckoutGrain]) *FileServer {
 	return &FileServer{
-		dataDir: dataDir,
-		storage: storage,
+		dataDir:         dataDir,
+		checkoutDataDir: checkoutDataDir,
+		storage:         storage,
+		checkoutStorage: checkoutStorage,
 	}
 }
 
@@ -79,6 +84,12 @@ func appendFileInfo(info fs.FileInfo, out *CartFileInfo) *CartFileInfo {
 	return out
 }
 
+func appendCheckoutFileInfo(info fs.FileInfo, out *CheckoutFileInfo) *CheckoutFileInfo {
+	out.Size = info.Size()
+	out.Modified = info.ModTime()
+	return out
+}
+
 // var cartFileRe = regexp.MustCompile(`^(\d+)\.events\.log$`)
 
 func listCartFiles(dir string) ([]*CartFileInfo, error) {
@@ -112,6 +123,36 @@ func listCartFiles(dir string) ([]*CartFileInfo, error) {
 	return out, nil
 }
 
+func listCheckoutFiles(dir string) ([]*CheckoutFileInfo, error) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return []*CheckoutFileInfo{}, nil
+		}
+		return nil, err
+	}
+	out := make([]*CheckoutFileInfo, 0)
+	for _, e := range entries {
+		if e.IsDir() {
+			continue
+		}
+		id, valid := isValidFileId(e.Name())
+		if !valid {
+			continue
+		}
+
+		info, err := e.Info()
+		if err != nil {
+			continue
+		}
+		out = append(out, appendCheckoutFileInfo(info, &CheckoutFileInfo{
+			ID:         fmt.Sprintf("%d", id),
+			CheckoutId: checkout.CheckoutId(id),
+		}))
+	}
+	return out, nil
+}
+
 func readRawLogLines(path string) ([]json.RawMessage, error) {
 	fh, err := os.Open(path)
 	if err != nil {
@@ -158,6 +199,21 @@ func (fs *FileServer) CartsHandler(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
+func (fs *FileServer) CheckoutsHandler(w http.ResponseWriter, r *http.Request) {
+	list, err := listCheckoutFiles(fs.checkoutDataDir)
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
+		return
+	}
+	// sort by modified desc
+	sort.Slice(list, func(i, j int) bool { return list[i].Modified.After(list[j].Modified) })
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"count":     len(list),
+		"checkouts": list,
+	})
+}
+
 func (fs *FileServer) PromotionsHandler(w http.ResponseWriter, r *http.Request) {
 	fileName := filepath.Join(fs.dataDir, "promotions.json")
 	if r.Method == http.MethodGet {
@@ -315,3 +371,69 @@ func (fs *FileServer) CartHandler(w http.ResponseWriter, r *http.Request) {
 		},
 	})
 }
+
+func (fs *FileServer) CheckoutHandler(w http.ResponseWriter, r *http.Request) {
+	idStr := r.PathValue("id")
+	if idStr == "" {
+		writeJSON(w, http.StatusBadRequest, JsonError{Error: "missing id"})
+		return
+	}
+	id, ok := isValidId(idStr)
+	if !ok {
+		writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid id"})
+		return
+	}
+	// parse query parameters for filtering
+	query := r.URL.Query()
+	filterFunction := acceptAll
+	if maxIndexStr := query.Get("maxIndex"); maxIndexStr != "" {
+		log.Printf("filter maxIndex: %s", maxIndexStr)
+		maxIndex, err := strconv.Atoi(maxIndexStr)
+		if err != nil {
+			writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid maxIndex"})
+			return
+		}
+		filterFunction = acceptUntilIndex(maxIndex)
+	} else if untilStr := query.Get("until"); untilStr != "" {
+		log.Printf("filter until: %s", untilStr)
+		until, err := time.Parse(time.RFC3339, untilStr)
+		if err != nil {
+			writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid until timestamp"})
+			return
+		}
+		filterFunction = acceptUntilTimestamp(until)
+	}
+	// reconstruct state from event log if present
+	grain := checkout.NewCheckoutGrain(id, cart.CartId(id), 0, time.Now(), nil)
+	err := fs.checkoutStorage.LoadEventsFunc(r.Context(), id, grain, filterFunction)
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
+		return
+	}
+
+	path := filepath.Join(fs.checkoutDataDir, fmt.Sprintf("%d.events.log", id))
+	info, err := os.Stat(path)
+	if err != nil && errors.Is(err, os.ErrNotExist) {
+		writeJSON(w, http.StatusNotFound, JsonError{Error: "checkout not found"})
+		return
+	} else if err != nil {
+		writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
+		return
+	}
+	lines, err := readRawLogLines(path)
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]any{
+		"id":         id,
+		"checkoutId": checkout.CheckoutId(id).String(),
+		"state":      grain,
+		"mutations":  lines,
+		"meta": map[string]any{
+			"size":     info.Size(),
+			"modified": info.ModTime(),
+			"path":     path,
+		},
+	})
+}