feat: add feature to get repostiory file

pkg/gitlab/repository_file.go

@@ -0,0 +1,41 @@
+package gitlab
+
+import (
+	"github.com/gopaytech/go-commons/pkg/ptr"
+	gl "github.com/xanzy/go-gitlab"
+)
+
+type RepositoryFile interface {
+	GetFileByPath(pid NameOrId, path, ref string) (*gl.File, error)
+	GetRawFileByPath(pid NameOrId, path, ref string) ([]byte, error)
+}
+
+type repositoryFile struct {
+	client *gl.Client
+}
+
+func (f *repositoryFile) GetFileByPath(pid NameOrId, path, ref string) (*gl.File, error) {
+	file, _, err := f.client.RepositoryFiles.GetFile(pid.ID, path, &gl.GetFileOptions{
+		Ref: ptr.String(ref),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return file, nil
+}
+
+func (f *repositoryFile) GetRawFileByPath(pid NameOrId, path, ref string) ([]byte, error) {
+	fileBytes, _, err := f.client.RepositoryFiles.GetRawFile(pid.ID, path, &gl.GetRawFileOptions{
+		Ref: ptr.String(ref),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return fileBytes, nil
+}
+
+func NewRepositoryFile(client *gl.Client) RepositoryFile {
+	return &repositoryFile{client: client}
+}

pkg/gitlab/repository_file_test.go

@@ -0,0 +1,40 @@
+package gitlab_test
+
+import (
+	"testing"
+
+	"github.com/gopaytech/go-commons/pkg/encoding"
+	"github.com/gopaytech/go-commons/pkg/gitlab"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_repositoryFile_GetFileByPath(t *testing.T) {
+	t.Run("Get file from branch testing should success", func(t *testing.T) {
+		client, err := gitlab.NewClient("https://gitlab.com", "")
+		assert.NoError(t, err)
+
+		projectClient := gitlab.NewRepositoryFile(client)
+
+		file, err := projectClient.GetFileByPath(gitlab.NameOrId{ID: 12967633}, "i<3Gitlab", "testing")
+		assert.NoError(t, err)
+		assert.NotNil(t, file)
+
+		content, err := encoding.Base64Decode(file.Content)
+		assert.NoError(t, err)
+		assert.Equal(t, "God is a woman.", content)
+	})
+}
+
+func Test_repositoryFile_GetRawFileByPath(t *testing.T) {
+	t.Run("Get raw file from branch testing should success", func(t *testing.T) {
+		client, err := gitlab.NewClient("https://gitlab.com", "")
+		assert.NoError(t, err)
+
+		projectClient := gitlab.NewRepositoryFile(client)
+
+		fileByte, err := projectClient.GetRawFileByPath(gitlab.NameOrId{ID: 12967633}, "i<3Gitlab", "testing")
+		assert.NoError(t, err)
+		assert.NotNil(t, fileByte)
+		assert.Equal(t, []byte("God is a woman."), fileByte)
+	})
+}