import { PrinterLanguage } from "./languages/base-printer-language";
import { ReceiptConfig } from "./receipt";
/**
 * Contains all data necessary to generate a printer receipt from a template
 */
type Source = {
    templateType: 'receipt' | 'html';
    /** The username of the mobile device. Used when retrieving templates online */
    userName: string;
    /** The template to use */
    template: string;
    /** Can contain settings to change specific parameters, if necessary.
     * @remarks Not used at the moment
     */
    settings: any;
    /** An array of key-value pairs which contain all labels. This translations are used to replace
     * all labels containing '{#...#}'
     */
    translations: any;
    /** Contains an array of objects, describing the receipt */
    model: any;
    /** The printer language to use. This will determine which how the receipt is printed */
    printerLanguage: PrinterLanguage;
    /** For internal use. */
    appVersion: string;
    /** Additional configuration for receipts */
    config?: ReceiptConfig;
};
/**
 * Used to generate printer receipt from a template
 */
export declare class ReceiptTemplateGenerator {
    /** Used to register handlebar helper functions */
    private intstallHandlebarsHelpers;
    private validateJsonTemplate;
    /**
     * [ASYNC] Used to generate and return a string representation of the document. This document contains all
     * necessary commands for the printer to print the receipt.
     * @param source - Options for generating the receipt. See {@link Source} for more details
     * @param loadImageFromFileInBase64  - [ASYNC] Function used to load images from file system, before generating the receipt
     * @throws Error if source argument is null, or if the source parameters are null
     */
    generate(source: Source, loadImageFromFileInBase64?: Function, loadTemplateFunction?: (templateName: string, templateParams?: Record<string, any>) => Promise<string | object>): Promise<string>;
    private parseJsonTemplate;
    private replaceTextLabels;
    /**
* [ASYNC] Used to generate and return an array representation of the document. This array will contain all
* necessary commands for the printer to print the receipt. The purpose of this method is to print a very long receipt
* in smaller batches, to avoid printer buffer overflow.
* @param source - Options for generating the receipt. See {@link Source} for more details
* @param batchInstructions - Number of instructions per batch. If 0 or not provided, the whole receipt will be generated in a single batch
* @param loadImageFromFileInBase64  - [ASYNC] Function used to load images from file system, before generating the receipt
* @param loadTemplateFunction - [ASYNC] Function used to load external templates, before generating the receipt
* @throws Error if source argument is null, or if the source parameters are null
*/
    generateBatchesAsync(source: Source, batchInstructions?: number, options?: any, loadImageFromFileInBase64?: Function, loadTemplateFunction?: (templateName: string, templateParams?: Record<string, any>) => Promise<string | object>): Promise<Array<string>>;
    /**
 * [ASYNC] Used to generate and return a string representation of the document. This document contains all
 * necessary commands for the printer to print the receipt.
 * @param source - Options for generating the receipt. See {@link Source} for more details
 * @param loadImageFromFileInBase64  - [ASYNC] Function used to load images from file system, before generating the receipt
 * @throws Error if source argument is null, or if the source parameters are null
 */
    generateAsync(source: Source, loadImageFromFileInBase64?: Function): Promise<string>;
    private validateSource;
}
export {};