// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package data

import (
	"errors"
)

var (
	ErrUnsupportedConversion = errors.New("Unsupported conversion")
)

// Convert a resource to a document and a document to a resource

type Emitter interface {
	Emit(document Document, filter ElementSelector) (Resource, error)
}

type Extractor interface {
	Extract(resource Resource, filter ElementSelector) (Document, error)
}

type Converter interface {
	Typer
	Emitter
	Extractor
	Close() error
}

type ManyExtractor interface {
	ExtractMany(resource Resource, filter ElementSelector) ([]Document, error)
}

type ManyEmitter interface {
	EmitMany(documents []Document, filter ElementSelector) (Resource, error)
}

type DirectoryConverter interface {
	SetRelative(flag bool)
}