Initial QSfera import

Server/pkg/structs/structs.go

@@ -0,0 +1,11 @@
+// Package structs provides some utility functions for dealing with structs.
+package structs
+
+// CopyOrZeroValue returns a copy of s if s is not nil otherwise the zero value of T will be returned.
+func CopyOrZeroValue[T any](s *T) *T {
+	cp := new(T)
+	if s != nil {
+		*cp = *s
+	}
+	return cp
+}

Server/pkg/structs/structs_test.go

@@ -0,0 +1,38 @@
+package structs
+
+import "testing"
+
+type example struct {
+	Attribute1 string
+	Attribute2 string
+}
+
+func TestCopyOrZeroValue(t *testing.T) {
+	var e *example
+
+	zv := CopyOrZeroValue(e)
+
+	if zv == nil {
+		t.Error("CopyOrZeroValue returned nil")
+	}
+
+	if zv.Attribute1 != "" || zv.Attribute2 != "" {
+		t.Error("CopyOrZeroValue didn't return zero value")
+	}
+
+	e2 := &example{Attribute1: "One", Attribute2: "Two"}
+
+	cp := CopyOrZeroValue(e2)
+
+	if cp == nil {
+		t.Error("CopyOrZeroValue returned nil")
+	}
+
+	if cp == e2 {
+		t.Error("CopyOrZeroValue returned reference with same address")
+	}
+
+	if cp.Attribute1 != e2.Attribute1 || cp.Attribute2 != e2.Attribute2 {
+		t.Error("CopyOrZeroValue didn't correctly copy attributes")
+	}
+}