feat: implement GetValueState and memoryStateValue for state management

1 files changed, 41 insertions, 0 deletions

diff --git a/state/memory_state.go b/state/memory_state.go
new file mode 100644
index 0000000..b7d26e2
--- /dev/null
+++ b/state/memory_state.go
@@ -0,0 +1,41 @@
+package state
+
+import "context"
+
+type memoryStateValue struct {
+	backend   *MemoryStateBackend
+	stateName string
+}
+
+func (m *memoryStateValue) Value(ctx context.Context) (any, error) {
+	kg := m.backend.currentGroupKey
+	key := m.backend.currentKey
+
+	if kgMap, exist := m.backend.states[m.stateName][kg]; exist {
+		if v, hasKey := kgMap[key]; hasKey {
+			return v, nil
+		}
+	}
+
+	return nil, nil
+}
+
+func (m *memoryStateValue) Update(ctx context.Context, newVal any) (any, error) {
+	kg := m.backend.currentGroupKey
+	key := m.backend.currentKey
+	if _, exists := m.backend.states[m.stateName][kg]; !exists {
+		m.backend.states[m.stateName][kg] = make(map[string]any)
+	}
+
+	m.backend.states[m.stateName][kg][key] = newVal
+	return newVal, nil
+}
+
+func (m *memoryStateValue) Clear(ctx context.Context) error {
+	kg := m.backend.currentGroupKey
+	key := m.backend.currentKey
+	if kgMap, exists := m.backend.states[m.stateName][kg]; exists {
+		delete(kgMap, key)
+	}
+	return nil
+}