1 files changed, 104 insertions, 0 deletions
diff --git a/pkg/values.go b/pkg/values.go
new file mode 100644
index 0000000..509b6bf
--- /dev/null
+++ b/pkg/values.go
@@ -0,0 +1,104 @@
+package gonf
+
+import (
+	"fmt"
+	"log/slog"
+	"strings"
+)
+
+type Value interface {
+	Bytes() []byte
+	String() string
+}
+
+func interfaceToValue(v any) Value {
+	if vv, ok := v.([]byte); ok {
+		return &BytesValue{vv}
+	}
+	if vv, ok := v.(int); ok {
+		return &IntValue{vv}
+	}
+	if vv, ok := v.(string); ok {
+		return &StringValue{vv}
+	}
+	if vv, ok := v.(*VariablePromise); ok {
+		return vv
+	}
+	slog.Error("interfaceToValue", "value", v, "error", "Not Implemented")
+	panic(fmt.Sprintf("interfaceToValue cannot take type %T as argument. Value was %#v.", v, v))
+}
+
+func interfaceToTemplateValue(v any) Value {
+	if vv, ok := v.([]byte); ok {
+		return &TemplateValue{data: string(vv)}
+	}
+	if vv, ok := v.(int); ok {
+		return &IntValue{vv}
+	}
+	if vv, ok := v.(string); ok {
+		return &TemplateValue{data: vv}
+	}
+	if vv, ok := v.(*VariablePromise); ok {
+		return vv
+	}
+	slog.Error("interfaceToTemplateValue", "value", v, "error", "Not Implemented")
+	panic(fmt.Sprintf("interfaceToTemplateValue cannot take type %T as argument. Value was %#v.", v, v))
+}
+
+// ----- BytesValue ------------------------------------------------------------
+type BytesValue struct {
+	value []byte
+}
+
+func (b BytesValue) Bytes() []byte {
+	return b.value
+}
+func (b BytesValue) String() string {
+	return string(b.value[:])
+}
+
+// ----- IntValue --------------------------------------------------------------
+type IntValue struct {
+	value int
+}
+
+func (i IntValue) Bytes() []byte {
+	return []byte(string(i.value))
+}
+func (i IntValue) Int() int {
+	return i.value
+}
+func (i IntValue) String() string {
+	return string(i.value)
+}
+
+// ----- StringsListValue ------------------------------------------------------
+type StringsListValue struct {
+	value []string
+}
+
+func (s *StringsListValue) Append(v ...string) {
+	s.value = append(s.value, v...)
+}
+func (s StringsListValue) Bytes() []byte {
+	return []byte(s.String())
+}
+func (s StringsListValue) String() string {
+	return strings.Join(s.value, "\n")
+}
+
+// ----- StringValue -----------------------------------------------------------
+type StringValue struct {
+	value string
+}
+
+func (s StringValue) Bytes() []byte {
+	return []byte(s.value)
+}
+func (s StringValue) String() string {
+	return s.value
+}
+
+// TODO maps
+
+// TODO what else?