@types/qrcode/index.d.ts

// Type definitions for qrcode 1.4
// Project: http://github.com/soldair/node-qrcode
// Definitions by: York Yao <https://github.com/plantain-00>
//                 Michael Nahkies <https://github.com/mnahkies>
//                 Rémi Sormain <https://github.com/Marchelune>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.1

/// <reference types="node" />

import * as stream from 'stream';

export type QRCodeErrorCorrectionLevel = 'low' | 'medium' | 'quartile' | 'high' | 'L' | 'M' | 'Q' | 'H';

export interface QRCodeOptions {
    /**
     * QR Code version. If not specified the more suitable value will be calculated.
     */
    version?: number;
    /**
     * Error correction level.
     * Possible values are low, medium, quartile, high or L, M, Q, H.
     * Default: M
     */
    errorCorrectionLevel?: QRCodeErrorCorrectionLevel;
    /**
     * Helper function used internally to convert a kanji to its Shift JIS value.
     * Provide this function if you need support for Kanji mode.
     */
    toSJISFunc?: (codePoint: string) => number;
}

export interface QRCodeToDataURLOptions extends QRCodeRenderersOptions {
    /**
     * Data URI format.
     * Default: image/png
     */
    type?: 'image/png' | 'image/jpeg' | 'image/webp';
    rendererOpts?: {
        /**
         * A Number between 0 and 1 indicating image quality if the requested type is image/jpeg or image/webp.
         * Default: 0.92
         */
        quality?: number;
    };
}

export interface QRCodeToStringOptions extends QRCodeRenderersOptions {
    /**
     * Output format.
     * Default: utf8
     */
    type?: 'utf8' | 'svg' | 'terminal';
}

export interface QRCodeToFileOptions extends QRCodeRenderersOptions {
    /**
     * Output format.
     * Default: png
     */
    type?: 'png' | 'svg' | 'utf8';
    rendererOpts?: {
        /**
         * Compression level for deflate.
         * Default: 9
         */
        deflateLevel?: number;
        /**
         * Compression strategy for deflate.
         * Default: 3
         */
        deflateStrategy?: number;
    };
}

export interface QRCodeToFileStreamOptions extends QRCodeRenderersOptions {
    /**
     * Output format. Only png supported for file stream
     */
    type?: 'png';
    rendererOpts?: {
        /**
         * Compression level for deflate.
         * Default: 9
         */
        deflateLevel?: number;
        /**
         * Compression strategy for deflate.
         * Default: 3
         */
        deflateStrategy?: number;
    };
}

export interface QRCodeToBufferOptions extends QRCodeRenderersOptions {
    /**
     * Output format. Only png supported for Buffer.
     */
    type?: 'png';
    rendererOpts?: {
        /**
         * Compression level for deflate.
         * Default: 9
         */
        deflateLevel?: number;
        /**
         * Compression strategy for deflate.
         * Default: 3
         */
        deflateStrategy?: number;
    };
}

export interface QRCodeRenderersOptions extends QRCodeOptions {
    /**
     * Define how much wide the quiet zone should be.
     * Default: 4
     */
    margin?: number;
    /**
     * Scale factor. A value of 1 means 1px per modules (black dots).
     * Default: 4
     */
    scale?: number;
    /**
     * Forces a specific width for the output image.
     * If width is too small to contain the qr symbol, this option will be ignored.
     * Takes precedence over scale.
     */
    width?: number;
    color?: {
        /**
         * Color of dark module. Value must be in hex format (RGBA).
         * Note: dark color should always be darker than color.light.
         * Default: #000000ff
         */
        dark?: string;
        /**
         * Color of light module. Value must be in hex format (RGBA).
         * Default: #ffffffff
         */
        light?: string;
    };
}

export interface QRCodeSegment {
    data: string | Buffer | Uint8ClampedArray;
    mode: 'alphanumeric' | 'numeric' | 'kanji' | 'byte';
}

export interface QRCode {
    /**
     * Bitmatrix class with modules data
     */
    modules: any;
    /**
     * Calculated QR Code version
     */
    version: number;
    /**
     * Error Correction Level
     */
    errorCorrectionLevel: number;
    /**
     * Calculated Mask pattern
     */
    maskPattern: any;
    /**
     * Generated segments
     */
    segments: QRCodeSegment[];
}

/**
 * Creates QR Code symbol and returns a qrcode object.
 */
export function create(text: string | QRCodeSegment[], options: QRCodeOptions): QRCode;

/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    callback: (error: Error) => void,
): void;
/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    options?: QRCodeRenderersOptions,
): Promise<any>;
/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    options: QRCodeRenderersOptions,
    callback: (error: Error) => void,
): void;
/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(
    text: string | QRCodeSegment[],
    callback: (error: Error, canvas: HTMLCanvasElement) => void,
): void;
/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(text: string | QRCodeSegment[], options?: QRCodeRenderersOptions): Promise<any>;
/**
 * Draws qr code symbol to canvas.
 */
export function toCanvas(
    text: string | QRCodeSegment[],
    options: QRCodeRenderersOptions,
    callback: (error: Error, canvas: HTMLCanvasElement) => void,
): void;
/**
 * Draws qr code symbol to node canvas.
 */
export function toCanvas(canvas: any, text: string | QRCodeSegment[], callback: (error: Error) => void): void;
/**
 * Draws qr code symbol to node canvas.
 */
export function toCanvas(canvas: any, text: string | QRCodeSegment[], options?: QRCodeRenderersOptions): Promise<any>;
/**
 * Draws qr code symbol to node canvas.
 */
export function toCanvas(
    canvas: any,
    text: string | QRCodeSegment[],
    options: QRCodeRenderersOptions,
    callback: (error: Error) => void,
): void;

/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    callback: (error: Error, url: string) => void,
): void;
/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    options?: QRCodeToDataURLOptions,
): Promise<string>;
/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(
    canvasElement: HTMLCanvasElement,
    text: string | QRCodeSegment[],
    options: QRCodeToDataURLOptions,
    callback: (error: Error, url: string) => void,
): void;

/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(text: string | QRCodeSegment[], callback: (error: Error, url: string) => void): void;
/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(text: string | QRCodeSegment[], options?: QRCodeToDataURLOptions): Promise<string>;
/**
 * Returns a Data URI containing a representation of the QR Code image.
 */
export function toDataURL(
    text: string | QRCodeSegment[],
    options: QRCodeToDataURLOptions,
    callback: (error: Error, url: string) => void,
): void;

/**
 * Returns a string representation of the QR Code.
 * If choosen output format is svg it will returns a string containing xml code.
 */
export function toString(text: string | QRCodeSegment[], callback: (error: Error, string: string) => void): void;
/**
 * Returns a string representation of the QR Code.
 * If choosen output format is svg it will returns a string containing xml code.
 */
export function toString(text: string | QRCodeSegment[], options?: QRCodeToStringOptions): Promise<string>;
/**
 * Returns a string representation of the QR Code.
 * If choosen output format is svg it will returns a string containing xml code.
 */
export function toString(
    text: string | QRCodeSegment[],
    options: QRCodeToStringOptions,
    callback: (error: Error, string: string) => void,
): void;

/**
 * Saves QR Code to image file.
 * If options.type is not specified, the format will be guessed from file extension.
 * Recognized extensions are png, svg, txt.
 */
export function toFile(path: string, text: string | QRCodeSegment[], callback: (error: Error) => void): void;
/**
 * Saves QR Code to image file.
 * If options.type is not specified, the format will be guessed from file extension.
 * Recognized extensions are png, svg, txt.
 */
export function toFile(path: string, text: string | QRCodeSegment[], options?: QRCodeToFileOptions): Promise<any>;
/**
 * Saves QR Code to image file.
 * If options.type is not specified, the format will be guessed from file extension.
 * Recognized extensions are png, svg, txt.
 */
export function toFile(
    path: string,
    text: string | QRCodeSegment[],
    options: QRCodeToFileOptions,
    callback: (error: Error) => void,
): void;

/**
 * Writes QR Code image to stream. Only works with png format for now.
 */
export function toFileStream(
    stream: stream.Writable,
    text: string | QRCodeSegment[],
    callback: (error: Error) => void,
): void;
/**
 * Writes QR Code image to stream. Only works with png format for now.
 */
export function toFileStream(
    stream: stream.Writable,
    text: string | QRCodeSegment[],
    options?: QRCodeToFileStreamOptions,
): Promise<any>;
/**
 * Writes QR Code image to stream. Only works with png format for now.
 */
export function toFileStream(
    stream: stream.Writable,
    text: string | QRCodeSegment[],
    options: QRCodeToFileStreamOptions,
    callback: (error: Error) => void,
): void;

/**
 * Returns a Buffer containing a representation of the QR Code image. Only works with png format.
 */
export function toBuffer(text: string | QRCodeSegment[], callback: (error: Error, buffer: Buffer) => void): void;
/**
 * Returns a Buffer containing a representation of the QR Code image. Only works with png format.
 */
export function toBuffer(text: string | QRCodeSegment[], options?: QRCodeToBufferOptions): Promise<Buffer>;
/**
 * Returns a Buffer containing a representation of the QR Code image. Only works with png format.
 */
export function toBuffer(
    text: string | QRCodeSegment[],
    options: QRCodeToBufferOptions,
    callback: (error: Error, buffer: Buffer) => void,
): void;