Update structure to domain driven architecture.

web/utils.go

@@ -0,0 +1,41 @@
+package web
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net/http"
+	"strconv"
+)
+
+// Server will respond with an expected struct of information.
+// Otherwise will return the correct error status code.
+// Client responsibility to check status then unmarshal to
+// error response or data
+func WriteJSON[T any](w http.ResponseWriter, status int, data T) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+
+	if err := json.NewEncoder(w).Encode(data); err != nil {
+		log.Printf("JSON encode error %v", err)
+	}
+}
+
+func userIDFromContext(ctx context.Context) (int64, bool) {
+	val := ctx.Value(userIDKey)
+	if val == nil {
+		return 0, false
+	}
+
+	strID, ok := val.(string)
+	if !ok {
+		return 0, false
+	}
+
+	id, err := strconv.ParseInt(strID, 10, 64)
+	if err != nil {
+		return 0, false
+	}
+
+	return id, true
+}