feat: add new linktpe pkg

services/graph/pkg/linktype/linktype.go

@@ -0,0 +1,165 @@
+package linktype
+
+import (
+	"errors"
+
+	linkv1beta1 "github.com/cs3org/go-cs3apis/cs3/sharing/link/v1beta1"
+	provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
+	"github.com/cs3org/reva/v2/pkg/storage/utils/grants"
+	libregraph "github.com/owncloud/libre-graph-api-go"
+	"github.com/owncloud/ocis/v2/services/graph/pkg/unifiedrole"
+)
+
+const NoPermissionMatchError = "no matching permission set found"
+
+type LinkType struct {
+	Permissions *provider.ResourcePermissions
+	linkType    libregraph.SharingLinkType
+}
+
+func (l *LinkType) GetPermissions() *provider.ResourcePermissions {
+	if l != nil {
+		return l.Permissions
+	}
+	return nil
+}
+
+// SharingLinkTypeFromCS3Permissions creates a libregraph link type
+// It returns a list of libregraph actions when the conversion is not possible
+func SharingLinkTypeFromCS3Permissions(permissions *linkv1beta1.PublicSharePermissions) (*libregraph.SharingLinkType, []string) {
+	linkTypes := GetAvailableLinkTypes()
+	for _, linkType := range linkTypes {
+		if grants.PermissionsEqual(linkType.GetPermissions(), permissions.GetPermissions()) {
+			return &linkType.linkType, nil
+		}
+	}
+	return nil, unifiedrole.CS3ResourcePermissionsToLibregraphActions(*permissions.GetPermissions())
+}
+
+func CS3ResourcePermissionsFromSharingLink(createLink libregraph.DriveItemCreateLink, info provider.ResourceType) (*provider.ResourcePermissions, error) {
+	switch createLink.GetType() {
+	case "":
+		return nil, errors.New("link type is empty")
+	case libregraph.VIEW:
+		return NewViewLinkPermissionSet().GetPermissions(), nil
+	case libregraph.EDIT:
+		if info == provider.ResourceType_RESOURCE_TYPE_FILE {
+			return NewFileEditLinkPermissionSet().GetPermissions(), nil
+		}
+		return NewFolderEditLinkPermissionSet().GetPermissions(), nil
+	case libregraph.CREATE_ONLY:
+		if info == provider.ResourceType_RESOURCE_TYPE_FILE {
+			return nil, errors.New(NoPermissionMatchError)
+		}
+		return NewFolderDropLinkPermissionSet().GetPermissions(), nil
+	case libregraph.UPLOAD:
+		if info == provider.ResourceType_RESOURCE_TYPE_FILE {
+			return nil, errors.New(NoPermissionMatchError)
+		}
+		return NewFolderUploadLinkPermissionSet().GetPermissions(), nil
+	case libregraph.INTERNAL:
+		return NewInternalLinkPermissionSet().GetPermissions(), nil
+	default:
+		return nil, errors.New(NoPermissionMatchError)
+	}
+}
+
+func NewInternalLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{},
+		linkType:    libregraph.INTERNAL,
+	}
+}
+
+func NewViewLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{
+			GetPath:              true,
+			GetQuota:             true,
+			InitiateFileDownload: true,
+			ListContainer:        true,
+			// why is this needed?
+			ListRecycle: true,
+			Stat:        true,
+		},
+		linkType: libregraph.VIEW,
+	}
+}
+
+func NewFileEditLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{
+			GetPath:              true,
+			GetQuota:             true,
+			InitiateFileDownload: true,
+			InitiateFileUpload:   true,
+			ListContainer:        true,
+			// why is this needed?
+			ListRecycle: true,
+			// why is this needed?
+			RestoreRecycleItem: true,
+			Stat:               true,
+		},
+		linkType: libregraph.EDIT,
+	}
+}
+
+func NewFolderEditLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{
+			CreateContainer:      true,
+			Delete:               true,
+			GetPath:              true,
+			GetQuota:             true,
+			InitiateFileDownload: true,
+			InitiateFileUpload:   true,
+			ListContainer:        true,
+			// why is this needed?
+			ListRecycle: true,
+			Move:        true,
+			// why is this needed?
+			RestoreRecycleItem: true,
+			Stat:               true,
+		},
+		linkType: libregraph.EDIT,
+	}
+}
+
+func NewFolderDropLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{
+			Stat:               true,
+			GetPath:            true,
+			CreateContainer:    true,
+			InitiateFileUpload: true,
+		},
+		linkType: libregraph.CREATE_ONLY,
+	}
+}
+
+func NewFolderUploadLinkPermissionSet() *LinkType {
+	return &LinkType{
+		Permissions: &provider.ResourcePermissions{
+			CreateContainer:      true,
+			GetPath:              true,
+			GetQuota:             true,
+			InitiateFileDownload: true,
+			InitiateFileUpload:   true,
+			ListContainer:        true,
+			ListRecycle:          true,
+			Stat:                 true,
+		},
+		linkType: libregraph.UPLOAD,
+	}
+}
+
+func GetAvailableLinkTypes() []*LinkType {
+	return []*LinkType{
+		NewInternalLinkPermissionSet(),
+		NewViewLinkPermissionSet(),
+		NewFolderUploadLinkPermissionSet(),
+		NewFileEditLinkPermissionSet(),
+		NewFolderEditLinkPermissionSet(),
+		NewFolderDropLinkPermissionSet(),
+	}
+}