feat: add inbox

internal/inbox/server.go

@@ -0,0 +1,54 @@
+package inbox
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func NewHandler(store Store) http.Handler {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/inbox", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		defer r.Body.Close()
+		var rec Record
+		if err := json.NewDecoder(r.Body).Decode(&rec); err != nil {
+			http.Error(w, "bad json", http.StatusBadRequest)
+			return
+		}
+		CompleteRecord(&rec)
+		if err := store.Append(rec); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]any{"ok": true, "id": rec.ID})
+	})
+	return mux
+}
+
+func CompleteRecord(rec *Record) {
+	if rec.ID == "" {
+		rec.ID = NewID(time.Now())
+	}
+	if rec.Time.IsZero() {
+		rec.Time = time.Now()
+	}
+	if rec.Status == "" {
+		rec.Status = StatusPending
+	}
+}
+
+func NewID(t time.Time) string {
+	var b [3]byte
+	if _, err := rand.Read(b[:]); err != nil {
+		return fmt.Sprintf("%s-000000", t.Format("20060102-150405"))
+	}
+	return fmt.Sprintf("%s-%s", t.Format("20060102-150405"), hex.EncodeToString(b[:]))
+}