lib: sandbox: refactor to memory store

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

lib/sandbox/store.go

@@ -0,0 +1,27 @@
+package sandbox
+
+// StoreFilter defines a function to filter
+// sandboxes in the store.
+type StoreFilter func(*Sandbox) bool
+
+// StoreReducer defines a function to
+// manipulate sandboxes in the store
+type StoreReducer func(*Sandbox)
+
+// Storer defines an interface that any container store must implement.
+type Storer interface {
+	// Add appends a new sandbox to the store.
+	Add(string, *Sandbox)
+	// Get returns a sandbox from the store by the identifier it was stored with.
+	Get(string) *Sandbox
+	// Delete removes a sandbox from the store by the identifier it was stored with.
+	Delete(string)
+	// List returns a list of sandboxes from the store.
+	List() []*Sandbox
+	// Size returns the number of sandboxes in the store.
+	Size() int
+	// First returns the first sandbox found in the store by a given filter.
+	First(StoreFilter) *Sandbox
+	// ApplyAll calls the reducer function with every sandbox in the store.
+	ApplyAll(StoreReducer)
+}