use consts for messages

CAN_ONLY_SHOW_PUBLIC_COLLECTIONS_CONTENT = "can only show public collections content"

NEED_COLLECTION_ID_OR_PROJECT_ID = "must give one of collection_id or project_id"

NEED_PROJECT_ID_IF_PARENT_ID_NULL = "project_id is needed when parent_id is null"

NEED_PROJECT_ID_OR_PARENT_ID = "use project_id OR parent_id"

NO_METADATASET_MIX = "can't mix metadata sets when setting multiple meta values at once"

NO_PATH = "path argument is missing"

NO_PROJECT_ACCESS = "No access ({}) for project {}"

NO_PROJECT_ID = "project_id is not set"

NO_SUCH_COLLECTION = "no such collection"

NO_SUCH_METADATASET = "no such metadatas set"

NO_SUCH_PROJECT = "no such project"

NO_SUCH_RESOURCE = "no such resource"

PERM_COLLECTION_CREATE = "collection.create"

PERM_COLLECTION_DELETE = "collection.delete"

PERM_COLLECTION_PUBLIC_ONLY = "collection.public_only"

PERM_COLLECTION_READ = "collection.read"

PERM_COLLECTION_UPDATE = "collection.update"

PERM_METADATASET_CREATE = "metadataset.create"

PERM_METADATASET_DELETE = "metadataset.delete"

PERM_METADATASET_READ = "metadataset.read"

PERM_METADATA_CREATE = "metadata.create"

PERM_METADATA_DELETE = "metadata.delete"

PERM_METADATA_READ = "metadata.read"

PERM_METADATA_UPDATE = "metadata.update"

PERM_PERMISSION_UPDATE = "permission.update"

PERM_RESOURCE_DELETE = "resource.delete"

PERM_RESOURCE_READ = "resource.read"

PERM_RESOURCE_UPDATE = "resource.update"

PERM_ROLE_READ = "role.read"

PERM_TAG_DELETE = "tag.delete"

ROOT_COLLECTION_TITLE = "root"

SEARCH_TERMS_LIMIT = 10

SUPERUSER_NEEDED = "only for superusers"

TOO_MANY_SEARCH_TERMS = "Too many search terms."