import { Schema } from '@lightweightform/storage';
/**
 * Abstract class which specifies the API used by serialisers to transform
 * application values into strings to be saved into files and vice-versa.
 */
export declare abstract class LfSerializer {
    /**
     * Character encoding to set as metadata when saving the file and used to
     * decode files.
     */
    abstract charset: string;
    /**
     * Mime type of the saved file.
     */
    abstract mimeType: string;
    /**
     * Accepted type of files (used by the `<input>` element when choosing a file
     * to load).
     */
    abstract accept: string;
    /**
     * Extension of file to save.
     */
    abstract extension: string;
    /**
     * Whether to automatically add an UTF BOM (not applied to IE9-).
     */
    abstract autoBOM: boolean;
    /**
     * A function used to encode the content according to the intended charset.
     */
    abstract encode?: (content: string) => BlobPart[];
    /**
     * Function which serializes the JS value provided by the storage into a
     * string to be saved into a file. The provided object is a copy of the actual
     * storage value (obtained via the storage's `getAsJS` method), so the
     * serialiser is allowed to manipulate the passed value.
     * @param js JS value to serialise.
     * @param schema Schema of the value to serialise.
     * @param path Storage path to the value to serialise.
     * @returns Serialised string to save into a file.
     */
    abstract serialize(js: any, schema: Schema, path: string): string;
    /**
     * Function which deserialises a string obtained from a file into a JS value
     * to load into the storage.
     * @param text String to deserialise.
     * @param schema Schema of the value being deserialised.
     * @param path Storage path to the value being deserialised.
     * @returns JS value to load into the storage.
     */
    abstract deserialize(text: string, schema: Schema, path: string): any;
}