botserver/packages/basic.gblib/services/ImageProcessingServices.ts

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'use strict';

import { GBLog, GBMinInstance } from 'botlib';
import { DialogKeywords } from './DialogKeywords.js';
import sharp from 'sharp';

/**
 * Image processing services of conversation to be called by BASIC.
 */
export class ImageProcessingServices {
  /**
   * Reference to minimal bot instance.
   */
  public min: GBMinInstance;

  /**
   * Reference to the base system keywords functions to be called.
   */
  public dk: DialogKeywords;

  /**
   * Current user object to get BASIC properties read.
   */
  public user;

  sys: any;

  /**
   * When creating this keyword facade,a bot instance is
   * specified among the deployer service.
   */
  constructor(min: GBMinInstance, user, dk) {
    this.min = min;
    this.user = user;
    this.dk = dk;
  }

  /**
   * Sharpen the image.
   *
   * @example file = SHARPEN file
   */
  public async sharpen({ pid, file: file }) {
    GBLog.info(`BASIC: Image Processing SHARPEN ${file}.`);

    const gbfile = DialogKeywords.getFileByHandle(file);
    const data = await sharp(gbfile.data)
      .sharpen({
        sigma: 2,
        m1: 0,
        m2: 3,
        x1: 3,
        y2: 15,
        y3: 15
      })
      .toBuffer();

    const newFile = {
      filename: gbfile.filename,
      data: data

    };
    return;
  }

  /**
   * Sharpen the image.
   *
   * @example file = BLUR file
   */
   public async blur({ pid, file: file }) {
    GBLog.info(`BASIC: Image Processing SHARPEN ${file}.`);

    const gbfile = DialogKeywords.getFileByHandle(file);
    const data = await sharp(gbfile.data)
      .blur()
      .toBuffer();

    const newFile = {
      filename: gbfile.filename,
      data: data
    };
    return;
  }

}