Started work on implmenting interface for status crud ops on filesystem

Now that the core has the interface for CRUD operations, I'm
implementing the interface in the CLI. The implementation in the CLI
will work with the statuses.yaml file to carry out the crud operations.

Someday I might write an implementation to deal with sqlite based
storage but today is not that day

statuscrud_file.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"github.com/kiriappeee/slack-status-updater-core"
+)
+
+type statusCRUDFileImplementation string
+
+func (s statusCRUDFileImplementation) GetStatuses() []ssucore.Status {
+	return []ssucore.Status{
+		ssucore.Status{"test", "emojiA", "Status One"},
+		ssucore.Status{"test1", "emojiB", "Status Two"},
+		ssucore.Status{"test2", "emojiC", "Status Three"},
+		ssucore.Status{"test3", "emojiD", "Status Four"},
+	}
+}
+
+func (s statusCRUDFileImplementation) GetStatusByKey(name string) (ssucore.Status, error) {
+	//stub
+	return ssucore.Status{}, nil
+}
+
+func (s statusCRUDFileImplementation) AddNewStatus(status ssucore.Status) error {
+	//stub
+	return nil
+}
+
+func (s statusCRUDFileImplementation) DeleteStatusByName(name string) error {
+	//stub
+	return nil
+}

statuscrud_file_test.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"os"
+	"testing"
+
+	"github.com/kiriappeee/slack-status-updater-core"
+)
+
+func TestStatusesCanBeListed(t *testing.T) {
+	var sci ssucore.StatusCRUDInterface
+	homeDirectory := os.Getenv("HOME")
+	sci = statusCRUDFileImplementation(homeDirectory + "/.config/ssuclitest/statuses.yaml")
+	statuses := ssucore.GetStatuses(sci)
+	if len(statuses) != 4 {
+		t.Fatalf("Did not receive the expected statuses")
+	}
+}