From 97dc090619eddcccb8162f84d074c8656c1b051c Mon Sep 17 00:00:00 2001
From: lash <dev@holbrook.no>
Date: Sat, 8 Apr 2023 10:20:34 +0100
Subject: [PATCH] Add stateful resource navigation

---
 go/resource/resource.go   |  4 ++++
 go/resource/state.go      | 29 +++++++++++++++++++++++++++++
 go/resource/state_test.go | 14 ++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 go/resource/state.go
 create mode 100644 go/resource/state_test.go

diff --git a/go/resource/resource.go b/go/resource/resource.go
index c2a8a58..d10ef95 100644
--- a/go/resource/resource.go
+++ b/go/resource/resource.go
@@ -36,20 +36,24 @@ type MenuResource struct {
 	funcFunc FuncForFunc
 }
 
+// NewMenuResource creates a new MenuResource instance.
 func NewMenuResource() *MenuResource {
 	return &MenuResource{}
 }
 
+// WithCodeGetter sets the code symbol resolver method.
 func(m *MenuResource) WithCodeGetter(codeGetter CodeFunc) *MenuResource {
 	m.codeFunc = codeGetter
 	return m
 }
 
+// WithEntryGetter sets the content symbol resolver getter method.
 func(m *MenuResource) WithEntryFuncGetter(entryFuncGetter FuncForFunc) *MenuResource {
 	m.funcFunc = entryFuncGetter
 	return m
 }
 
+// WithTemplateGetter sets the template symbol resolver method.
 func(m *MenuResource) WithTemplateGetter(templateGetter TemplateFunc) *MenuResource {
 	m.templateFunc = templateGetter
 	return m
diff --git a/go/resource/state.go b/go/resource/state.go
new file mode 100644
index 0000000..5b0b8de
--- /dev/null
+++ b/go/resource/state.go
@@ -0,0 +1,29 @@
+package resource
+
+import (
+	"git.defalsify.org/festive/state"
+)
+
+type StateResource struct {
+	Resource
+	st *state.State
+}
+
+func ToStateResource(rs Resource) *StateResource {
+	return &StateResource{rs, nil}
+}
+
+func NewStateResource(st *state.State) *StateResource {
+	return &StateResource {
+		NewMenuResource(),
+		st,
+	}
+}
+
+func(s *StateResource) WithState(st *state.State) *StateResource {
+	if s.st != nil {
+		panic("state already set")
+	}
+	s.st = st
+	return s
+}
diff --git a/go/resource/state_test.go b/go/resource/state_test.go
new file mode 100644
index 0000000..b743958
--- /dev/null
+++ b/go/resource/state_test.go
@@ -0,0 +1,14 @@
+package resource
+
+import (
+	"testing"
+
+	"git.defalsify.org/festive/state"
+)
+
+func TestStateResourceInit(t *testing.T) {
+	st := state.NewState(0)
+	rs := NewMenuResource()
+	_ = ToStateResource(rs).WithState(&st)
+	_ = NewStateResource(&st)
+}