
/*****************************************************************************\
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|                                                                             |
| General Bots Copyright (c) pragmatismo.com.br. All rights reserved.         |
| Licensed under the AGPL-3.0.                                                |
|                                                                             |
| According to our dual licensing model, this program can be used either      |
| under the terms of the GNU Affero General Public License, version 3,        |
| or under a proprietary license.                                             |
|                                                                             |
| The texts of the GNU Affero General Public License with an additional       |
| permission and of our proprietary license can be found at and               |
| in the LICENSE file you have received along with this program.              |
|                                                                             |
| This program is distributed in the hope that it will be useful,             |
| but WITHOUT ANY WARRANTY, without even the implied warranty of              |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                |
| GNU Affero General Public License for more details.                         |
|                                                                             |
| "General Bots" is a registered trademark of pragmatismo.com.br.             |
| The licensing of the program under the AGPLv3 does not imply a              |
| trademark license. Therefore any rights, title and interest in              |
| our trademarks remain entirely with us.                                     |
|                                                                             |
\*****************************************************************************/
'use strict';
import { GBLog, GBMinInstance } from 'botlib';
import { GBConfigService } from '../../core.gbapp/services/GBConfigService.js';
import { CollectionUtil } from 'pragmatismo-io-framework';
import { GBAdminService } from '../../admin.gbapp/services/GBAdminService.js';
import { GBDeployer } from '../../core.gbapp/services/GBDeployer.js';
import { DialogKeywords } from './DialogKeywords.js';
import { GBServer } from '../../../src/app.js';
import { GBVMService } from './GBVMService.js';
import Fs from 'fs';
import { GBSSR } from '../../core.gbapp/services/GBSSR.js';
import urlJoin from 'url-join';
import Excel from 'exceljs';
import { TwitterApi } from 'twitter-api-v2';
import Path from 'path';
import ComputerVisionClient from '@azure/cognitiveservices-computervision';
import ApiKeyCredentials from '@azure/ms-rest-js';
import alasql from 'alasql';
import PizZip from 'pizzip';
import Docxtemplater from 'docxtemplater';
import pptxTemplaterModule from 'pptxtemplater';
import _ from 'lodash';
import { pdfToPng, PngPageOutput } from 'pdf-to-png-converter';
import sharp from 'sharp';
import ImageModule from 'open-docxtemplater-image-module';
import DynamicsWebApi from 'dynamics-web-api';
import * as MSAL from '@azure/msal-node';
import { GBConversationalService } from '../../core.gbapp/services/GBConversationalService.js';
import { WebAutomationServices } from './WebAutomationServices.js';
import { KeywordsExpressions } from './KeywordsExpressions.js';
import { ChatServices } from '../../gpt.gblib/services/ChatServices.js';
import mime from 'mime-types';
import exts from '../../../extensions.json' assert { type: 'json' };
import { SecService } from '../../security.gbapp/services/SecService.js';
import { GBLogEx } from '../../core.gbapp/services/GBLogEx.js';
import retry from 'async-retry';
import {
  BlobServiceClient,
  BlockBlobClient,
  StorageSharedKeyCredential
} from '@azure/storage-blob';

import { md5 } from 'js-md5';
import { GBUtil } from '../../../src/util.js';

/**
 * @fileoverview General Bots server core.
 */

/**
 * BASIC system class for extra manipulation of bot behaviour.
 */
export class SystemKeywords {

  /**
   * @tags System
   */
  public async callVM({ pid, text }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const step = null;
    const deployer = null;

    return await GBVMService.callVM(text, min, step, pid,false, [text]);
  }

  public async append({ pid, args }) {
    let array = [].concat(...args);
    return array.filter(function (item, pos) {
      return item;
    });
  }

  /**
   *
   * @example SEE CAPTION OF url AS variable
   *
   */
  public async seeCaption({ pid, url }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const computerVisionClient = new ComputerVisionClient.ComputerVisionClient(
      new ApiKeyCredentials.ApiKeyCredentials({ inHeader: { 'Ocp-Apim-Subscription-Key': process.env.VISION_KEY } }),
      process.env.VISION_ENDPOINT
    );

    let caption = (await computerVisionClient.describeImage(url)).captions[0];

    const contentLocale = min.core.getParam(
      min.instance,
      'Default Content Language',
      GBConfigService.get('DEFAULT_CONTENT_LANGUAGE')
    );
    GBLog.info(`GBVision (caption): '${caption.text}' (Confidence: ${caption.confidence.toFixed(2)})`);

    return await min.conversationalService.translate(min, caption.text, contentLocale);
  }

  /**
   *
   * @example SEE TEXT OF url AS variable
   *
   */
  public async seeText({ pid, url }) {
    const computerVisionClient = new ComputerVisionClient.ComputerVisionClient(
      new ApiKeyCredentials.ApiKeyCredentials({ inHeader: { 'Ocp-Apim-Subscription-Key': process.env.VISION_KEY } }),
      process.env.VISION_ENDPOINT
    );

    const result = await computerVisionClient.recognizePrintedText(true, url);
    const text = result.regions[0].lines[0].words[0].text;
    let final = '';

    for (let i = 0; i < result.regions.length; i++) {
      const region = result.regions[i];

      for (let j = 0; j < region.lines.length; j++) {
        const line = region.lines[j];

        for (let k = 0; k < line.words.length; k++) {
          final += `${line.words[k].text} `;
        }
      }
    }

    GBLog.info(`GBVision (text): '${final}'`);
    return final;
  }

  public async sortBy({ pid, array, memberName }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    memberName = memberName.trim();
    const contentLocale = min.core.getParam(
      min.instance,
      'Default Content Language',
      GBConfigService.get('DEFAULT_CONTENT_LANGUAGE')
    );

    // Detects data type from the first element of array.

    let dt = array[0] ? array[0][memberName] : null;
    let date = SystemKeywords.getDateFromLocaleString(pid, dt, contentLocale);
    if (date) {
      return array
        ? array.sort((a, b) => {
          const c = new Date(a[memberName]);
          const d = new Date(b[memberName]);
          return c.getTime() - d.getTime();
        })
        : null;
    } else {
      return array
        ? array.sort((a, b) => {
          if (a[memberName] < b[memberName]) {
            return -1;
          }
          if (a[memberName] > b[memberName]) {
            return 1;
          }
          return 0;
        })
        : array;
    }
  }

  public static JSONAsGBTable(data, headers) {
    try {
      let output = [];
      let isObject = false;
      if (data[0].gbarray) {
        return data;
      } // Already GB Table.
      if (Array.isArray(data)) {
        isObject = Object.keys(data[1]) !== null;
      } else {
        isObject = true;
      }

      if (isObject || JSON.parse(data) !== null) {
        // Copies data from JSON format into simple array.

        if (!Array.isArray(data)) {
          // If data is a single object, wrap it in an array
          data = [data];
        }

        // Ensure that keys is an array of strings representing the object keys
        const keys = Object.keys(data[0]);

        if (headers) {
          output[0] = [];

          // Copies headers as the first element.

          for (let i = 0; i < keys.length; i++) {
            output[0][i] = keys[i];
          }
        } else {
          output.push({ gbarray: '0' });
        }

        for (let i = 0; i < data.length; i++) {
          output[i + 1] = [];
          for (let j = 0; j < keys.length; j++) {
            output[i + 1][j] = data[i][keys[j]];
          }
        }
        return output;
      }
    } catch (error) {
      GBLog.error(error);
      return data;
    }
  }

  /**
   *
   * @param data
   * @param renderImage
   * @returns
   *
   * @see http://tabulator.info/examples/5.2
   */
  private async renderTable(pid, data, renderPDF, renderImage) {
    if (data.length && !data[1]) {
      return null;
    }

    data = SystemKeywords.JSONAsGBTable(data, true);

    // Detects if it is a collection with repeated
    // headers.

    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const gbaiName = DialogKeywords.getGBAIPath(min.botId);
    const browser = await GBSSR.createBrowser(null);
    const page = await browser.newPage();
    await page.minimize();

    // Includes the associated CSS related to current theme.

    const theme: string = await DialogKeywords.getOption({ pid, name: 'theme', root: true });
    switch (theme) {
      case 'white':
        await page.addStyleTag({ path: 'node_modules/tabulator-tables/dist/css/tabulator_simple.min.css' });
        break;
      case 'dark':
        await page.addStyleTag({ path: 'node_modules/tabulator-tables/dist/css/tabulator_midnight.min.css' });
        break;
      case 'blue':
        await page.addStyleTag({ path: 'node_modules/tabulator-tables/dist/css/tabulator_modern.min.css' });
        break;
      default:
        break;
    }

    await page.addScriptTag({ path: 'node_modules/tabulator-tables/dist/js/tabulator.min.js' });

    // Removes internal hidden element used to hold one-based index arrays.

    data.shift();

    // Guess fields from data variable into Tabulator fields collection.

    let fields = [];
    let keys = Object.keys(data[0]);
    for (let i = 0; i < keys.length; i++) {
      fields.push({ field: keys[i], title: keys[i] });
    }

    // Adds DIV for Tabulator.

    await page.evaluate(() => {
      const el = document.createElement('div');
      el.setAttribute('id', 'table');
      document.body.appendChild(el);
    });

    const code = `
        var table = new Tabulator("#table", {
        height:"auto",
        layout:"fitDataStretch",
        data: ${JSON.stringify(data)},
        columns: ${JSON.stringify(fields)}
    });
    `;
    await page.evaluate(code);
    await page.waitForSelector('#table');

    // Handles image generation.

    let url;
    let localName;
    if (renderImage) {
      localName = Path.join('work', gbaiName, 'cache', `img${GBAdminService.getRndReadableIdentifier()}.png`);
      await page.screenshot({ path: localName, fullPage: true });
      url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(localName));
      GBLog.info(`BASIC: Table image generated at ${url} .`);
    }

    // Handles PDF generation.

    if (renderPDF) {
      localName = Path.join('work', gbaiName, 'cache', `img${GBAdminService.getRndReadableIdentifier()}.pdf`);
      url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(localName));
      let pdf = await page.pdf({ format: 'A4' });
      GBLog.info(`BASIC: Table PDF generated at ${url} .`);
    }

    await browser.close();
    return { url, localName };
  }

  public async closeHandles({ pid }) {
    delete this.cachedMerge[pid];
  }

  public async asPDF({ pid, data }) {
    let file = await this.renderTable(pid, data, true, false);
    return file;
  }

  public async asImage({ pid, data }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);

    // Checks if it is a GBFILE.

    if (data.data) {
      const gbfile = data.data;

      let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
      const botId = min.instance.botId;
      const gbaiName = DialogKeywords.getGBAIPath(min.botId);
      const tmpDocx = urlJoin(gbaiName, `${botId}.gbdrive`, `tmp${GBAdminService.getRndReadableIdentifier()}.docx`);

      // Performs the conversion operation.

      await client.api(`${baseUrl}/drive/root:/${tmpDocx}:/content`).put(data.data);
      const res = await client.api(`${baseUrl}/drive/root:/${tmpDocx}:/content?format=pdf`).get();
      await client.api(`${baseUrl}/drive/root:/${tmpDocx}:/content`).delete();

      const streamToBuffer = stream => {
        const chunks = [];
        return new Promise((resolve, reject) => {
          stream.on('data', chunk => chunks.push(chunk));
          stream.on('error', reject);
          stream.on('end', () => resolve(Buffer.concat(chunks)));
        });
      };

      gbfile.data = await streamToBuffer(res);

      // Converts the PDF to PNG.

      const pngPages: PngPageOutput[] = await pdfToPng(gbfile.data, {
        disableFontFace: false,
        useSystemFonts: false,
        viewportScale: 2.0,
        pagesToProcess: [1],
        strictPagesToProcess: false,
        verbosityLevel: 0
      });

      // Prepare an image on cache and return the GBFILE information.

      const localName = Path.join('work', gbaiName, 'cache', `img${GBAdminService.getRndReadableIdentifier()}.png`);
      if (pngPages.length > 0) {
        const buffer = pngPages[0].content;
        const url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(localName));

        Fs.writeFileSync(localName, buffer, { encoding: null });

        return { localName: localName, url: url, data: buffer };
      }
    } else {
      let file = await this.renderTable(pid, data, false, true);
      return file;
    }
  }

  public async executeSQL({ pid, data, sql, tableName }) {
    if (!data || !data[0]) {
      return data;
    }
    let objectMode = false;
    if (data[0].gbarray) {
      objectMode = true;
    }

    let first;
    if (objectMode) {
      first = data.shift();
    }
    data = alasql(sql, [data]);
    if (objectMode) {
      data.unshift(first);
    }
    return data;
  }

  /**
   * Retrives the content of a given URL.
   */
  public async getFileContents({ pid, url, headers }) {
    const options = {
      method: 'GET',
      encoding: 'binary',
      headers: headers
    };
    return await fetch(url, options);
  }

  /**
   * Retrives a random id with a length of five, every time it is called.
   */
  public getRandomId() {
    const idGeneration = '1v'; // TODO:  this.dk['idGeneration'];
    if (idGeneration && idGeneration.trim().toLowerCase() === 'number') {
      return GBAdminService.getNumberIdentifier();
    } else {
      return GBAdminService.getRndReadableIdentifier().substr(5);
    }
  }

  /**
   * Retrives stock inforation for a given symbol.
   */
  public async getStock({ pid, symbol }) {
    const url = `http://live-nse.herokuapp.com/?symbol=${symbol}`;
    let data = await fetch(url);
    return data;
  }

  /**
   * Holds script execution for the number of seconds specified.
   *
   * @example WAIT 5 ' This will wait five seconds.
   *
   */
  public async wait({ pid, seconds }) {
    // tslint:disable-next-line no-string-based-set-timeout
    GBLog.info(`BASIC: WAIT for ${seconds} second(s).`);
    const timeout = async (ms: number) => new Promise(resolve => setTimeout(resolve, ms));
    await timeout(seconds * 1000);
  }

  /**
   * Sends a text message to the mobile number specified.
   *
   * @example TALK TO "+199988887777", "Message text here"
   *
   */
  public async talkTo({ pid, mobile, message }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: Talking '${message}' to a specific user (${mobile}) (TALK TO). `);
    await min.conversationalService.sendMarkdownToMobile(min, null, mobile, message);
  }

  /**
   * Get a user object from a alias.
   *
   * @example user = USER "someone"
   *
   */
  public async getUser({ pid, username }) {
    const { min } = await DialogKeywords.getProcessInfo(pid);
    let sec = new SecService();
    const user = await sec.getUserFromUsername(min.instance.instanceId, username);

    return { displayName: user.displayName, mobile: user.userSystemId, email: user.email };
  }

  /**
   * Sends a SMS message to the mobile number specified.
   *
   * @example SEND SMS TO "+199988887777", "Message text here"
   *
   */
  public async sendSmsTo({ pid, mobile, message }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: SEND SMS TO '${mobile}', message '${message}'.`);
    await min.conversationalService.sendSms(min, mobile, message);
  }

  /**
   * 1. Defines a cell value in the tabular file.
   * 2. Defines an element text on HTML page.
   *
   * @example SET "file.xlsx", "A2", 4500
   *
   * @example SET page, "elementHTMLSelector", "text"

   */
  public async set({ pid, handle, file, address, value, name = null }): Promise<any> {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);

    // Handles calls for HTML stuff

    if (handle && WebAutomationServices.isSelector(file)) {
      GBLog.info(`BASIC: Web automation SET ${file}' to '${address}'    . `);
      await new WebAutomationServices().setElementText({ pid, handle, selector: file, text: address });

      return;
    }

    // TODO: Add a semaphore between FILTER and SET.

    // Processes FILTER option to ensure parallel SET calls.

    const filter = await DialogKeywords.getOption({ pid, name: 'filter' });
    if (filter) {
      const row = this.find({ pid, handle: null, args: [filter] });
      address += row['line'];
    }

    // Handles calls for BASIC persistence on sheet files.

    GBLog.info(`BASIC: Defining '${address}' in '${file}' to '${value}' (SET). `);

    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

    const botId = min.instance.botId;
    const path = DialogKeywords.getGBAIPath(botId, 'gbdata');
    let document = await this.internalGetDocument(client, baseUrl, path, file);
    let sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();
    let body = { values: [[]] };

    // Processes FILTER option to ensure parallel SET calls.

    let titleAddress;

    if (filter) {
      // Transforms address number (col index) to letter based.
      // Eg.: REM This is A column and index automatically specified by filter.
      //      SET file.xlsx, 1, 4000

      if (KeywordsExpressions.isNumber(address)) {
        address = `${this.numberToLetters(address)}`;
        titleAddress = `${address}1:${address}1`;
      }

      // Processes SET FILTER directive to calculate address.

      body.values[0][0] = 'id';
      const addressId = 'A1:A1';
      await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${addressId}')`
        )
        .patch(body);

      const row = await this.find({ pid, handle: null, args: [file, filter] });
      if (row) {
        address += row['line']; // Eg.: "A" + 1 = "A1".
      }
    }
    address = address.indexOf(':') !== -1 ? address : address + ':' + address;

    if (titleAddress) {
      body.values[0][0] = name.trim().replace(/[^a-zA-Z]/gi, '');

      await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${titleAddress}')`
        )
        .patch(body);
    }

    body.values[0][0] = value;
    await client
      .api(
        `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${address}')`
      )
      .patch(body);
  }

  /**
   * Retrives a document from the drive, given a path and filename.
   */
  public async internalGetDocument(client: any, baseUrl: any, path: string, file: string) {
    let res = await client.api(`${baseUrl}/drive/root:/${path}:/children`).get();

    let documents = res.value.filter(m => {
      return m.name.toLowerCase() === file.toLowerCase();
    });

    if (!documents || documents.length === 0) {
      throw new Error(
        `File '${file}' specified on GBasic command not found. Check the .gbdata or the .gbdialog associated.`,
        { cause: 404 }
      );
    }

    return documents[0];
  }

  /**
   * Saves the content of variable into the file in .gbdata default folder.
   *
   * @exaple SAVE variable as "my.txt"
   *
   */
  public async saveFile({ pid, file, data }): Promise<any> {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: Saving '${file}' (SAVE file).`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const botId = min.instance.botId;
    const path = DialogKeywords.getGBAIPath(min.botId, `gbdrive`);

    // Checks if it is a GB FILE object.

    if (data.data && data.filename) {
      data = data.data;
    }

    try {
      data = GBServer.globals.files[data].data; // TODO
      await client.api(`${baseUrl}/drive/root:/${path}/${file}:/content`).put(data);
    } catch (error) {
      if (error.code === 'itemNotFound') {
        GBLog.info(`BASIC: BASIC source file not found: ${file}.`);
      } else if (error.code === 'nameAlreadyExists') {
        GBLog.info(`BASIC: BASIC destination file already exists: ${file}.`);
      }
      throw error;
    }
  }

  /**
   * Saves the content of variable into BLOB storage.
   *
   * MSFT uses MD5, see https://katelynsills.com/law/the-curious-case-of-md5.
   * 
   * @exaple UPLOAD file.
   *
   */
  public async uploadFile({ pid, file }): Promise<any> {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: UPLOAD '${file.name}' ${file.size} bytes.`);

    // Checks if it is a GB FILE object.

    const accountName = min.core.getParam(min.instance, 'Blob Account');
    const accountKey = min.core.getParam(min.instance, 'Blob Key');

    const sharedKeyCredential = new StorageSharedKeyCredential(
      accountName,
      accountKey
    );
    const baseUrl = `https://${accountName}.blob.core.windows.net`;

    const blobServiceClient = new BlobServiceClient(
      `${baseUrl}`,
      sharedKeyCredential
    );


    // It is an SharePoint object that needs to be downloaded.

    const gbaiName = DialogKeywords.getGBAIPath(min.botId);
    const localName = Path.join('work', gbaiName, 'cache', `${GBAdminService.getRndReadableIdentifier()}.tmp`);
    const url = file['url'];
    const response = await fetch(url);

    // Writes it to disk and calculate hash.

    const data = await response.arrayBuffer();
    Fs.writeFileSync(localName, Buffer.from(data), { encoding: null });
    const hash = new Uint8Array(md5.array(data));

    // Performs uploading passing local hash.

    const container = blobServiceClient.getContainerClient(accountName);
    const blockBlobClient: BlockBlobClient = container.getBlockBlobClient(file.path);
    const res = await blockBlobClient.uploadFile(localName,
      {
        blobHTTPHeaders: {
          blobContentMD5: hash
        }
      });

    // If upload is OK including hash check, removes the temporary file.

    if (res._response.status === 201 &&
      (new Uint8Array(res.contentMD5)).toString() === hash.toString()) {
      Fs.rmSync(localName);

      file['md5'] = hash.toString();

      return file;

    }
    else {
      GBLog.error(`BASIC: BLOB HTTP ${res.errorCode} ${res._response.status} .`);
    }

  }


  /**
   * Takes note inside a notes.xlsx of .gbdata.
   *
   * @example NOTE "text"
   *
   */
  public async note({ pid, text }): Promise<any> {
    await this.save({ pid, file: "Notes.xlsx", args: [text] });
  }

  /**
  * Saves variables to storage, not a worksheet.
  *
  */
  public async saveToStorageBatch({ pid, table, rows }): Promise<void> {
    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: Saving batch to storage '${table}' (SAVE).`);

    if (rows.length === 0) {

      return;
    }

    const definition = this.getTableFromName(table, min);
    const rowsDest = [];

    rows.forEach(row => {

      const dst = {};
      let i = 0;
      Object.keys(row).forEach(column => {
        const field = column.charAt(0).toUpperCase() + column.slice(1);
        dst[field] = row[column];
        i++;
      });
      rowsDest.push(dst);
    });

    await retry(
      async (bail) => {
        await definition.bulkCreate(GBUtil.caseInsensitive(rowsDest));
      },
      {
        retries: 5,
        onRetry: (err) => { GBLog.error(`Retrying SaveToStorageBatch due to: ${err.message}.`); }
      }
    );
  }


  /**
  * Saves variables to storage, not a worksheet.
  *
  * @example SAVE "Billing",  columnName1, columnName2
  * 
  */
  public async saveToStorage({ pid, table, fieldsValues, fieldsNames }): Promise<any> {

    if (!fieldsValues  || fieldsValues.length===0 || !fieldsValues[0]){

      return;
    }

    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: Saving to storage '${table}' (SAVE).`);

    const definition = this.getTableFromName(table, min);

    let dst = {};
    // Uppercases fields.
    let i = 0;
    Object.keys(fieldsValues).forEach(fieldSrc => {
      const field = fieldsNames[i].charAt(0).toUpperCase() + fieldsNames[i].slice(1);

      dst[field] = fieldsValues[fieldSrc];

      i++;
    });

    let item;
    await retry(
      async (bail) => {
        item = await definition.create(dst);
      },
      {
        retries: 5,
        onRetry: (err) => { GBLog.error(`Retrying SaveToStorage due to: ${err.message}.`); }
      }

    );
    return item;

  }

  public async saveToStorageWithJSON({ pid, table, fieldsValues, fieldsNames }): Promise<any> {

    GBLog.info(`BASIC: Saving to storage '${table}' (SAVE).`);
    const minBoot = GBServer.globals.minBoot as any;
    const definition = minBoot.core.sequelize.models[table];

    let out = [];
    let data = {}, data2 = {};

    // Flattern JSON to a table.

    data = this.flattenJSON(fieldsValues);

    // Uppercases fields.

    Object.keys(data).forEach(field => {
      const field2 = field.charAt(0).toUpperCase() + field.slice(1);
      data2[field2] = data[field];
    });

    return await definition.create(data2);
  }

  /**
   * Saves the content of several variables to a new row in a tabular file.
   *
   * @example SAVE "customers.xlsx", name, email, phone, address, city, state, country
   *
   */
  public async save({ pid, file, args }): Promise<any> {

    if (!args){
      return;
    }

    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: Saving '${file}' (SAVE). Args: ${args.join(',')}.`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const botId = min.instance.botId;
    const path = DialogKeywords.getGBAIPath(botId, 'gbdata');

    let sheets;
    let document;
    try {
      document = await this.internalGetDocument(client, baseUrl, path, file);
      sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();
    } catch (e) {
      if (e.cause === 404) {
        // Creates the file.

        const blank = Path.join(process.env.PWD, 'blank.xlsx');
        const data = Fs.readFileSync(blank);
        await client.api(`${baseUrl}/drive/root:/${path}/${file}:/content`).put(data);

        // Tries to open again.

        document = await this.internalGetDocument(client, baseUrl, path, file);
        sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();
      } else {
        throw e;
      }
    }

    let address;
    let body = { values: [[]] };

    // Processes FILTER option to ensure parallel SET calls.

    const filter = await DialogKeywords.getOption({ pid, name: 'filter' });
    if (filter) {
      // Creates id row.

      body.values[0][0] = 'id';
      const addressId = 'A1:A1';
      await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${addressId}')`
        )
        .patch(body);
      body.values[0][0] = undefined;

      // FINDs the filtered row to be updated.

      const row = await this.find({ pid, handle: null, args: [file, filter] });
      if (row) {
        address = `A${row['line']}:${this.numberToLetters(args.length)}${row['line']}`;
      }
    }

    // Editing or saving detection.

    if (!address) {
      await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='A2:DX2')/insert`
        )
        .post({});
      address = `A2:${this.numberToLetters(args.length - 1)}2`;
    }

    // Fills rows object to call sheet API.

    for (let index = 0; index < args.length; index++) {
      let value = args[index];
      if (value && (await this.isValidDate({ pid, dt: value }))) {
        value = `'${value}`;
      }

      // If  filter is defined, skips id column.

      body.values[0][filter ? index + 1 : index] = value;
    }
    await client
      .api(
        `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${address}')`
      )
      .patch(body);
  }

  /**
   * Retrives the content of a cell in a tabular file.
   *
   * @example value = GET "file.xlsx", "A2"
   *
   */
  public async getHttp({ pid, file, addressOrHeaders, httpUsername, httpPs, qs, streaming }): Promise<any> {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    if (file.startsWith('http')) {
      return await this.getByHttp({
        pid,
        url: file,
        headers: addressOrHeaders,
        username: httpUsername,
        ps: httpPs,
        qs
      });
    } else {
      GBLog.info(`BASIC: GET '${addressOrHeaders}' in '${file}'.`);
      let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
      const botId = min.instance.botId;
      ('');
      const path = DialogKeywords.getGBAIPath(botId, 'gbdata');

      let document = await this.internalGetDocument(client, baseUrl, path, file);

      // Creates workbook session that will be discarded.

      let sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();

      let results = await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='${addressOrHeaders}')`
        )
        .get();

      let val = results.text[0][0];
      GBLog.info(`BASIC: Getting '${file}' (GET). Value= ${val}.`);
      return val;
    }
  }

  public async isValidDate({ pid, dt }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const contentLocale = min.core.getParam(
      min.instance,
      'Default Content Language',
      GBConfigService.get('DEFAULT_CONTENT_LANGUAGE')
    );

    let date = SystemKeywords.getDateFromLocaleString(pid, dt, contentLocale);
    if (!date) {
      return false;
    }

    if (!(date instanceof Date)) {
      date = new Date(date);
    }

    return !isNaN(date.valueOf());
  }

  public async isValidNumber({ pid, number }) {
    return KeywordsExpressions.isNumber(number);
  }

  public isValidHour({ pid, value }) {
    return /^([01]?[0-9]|2[0-3]):[0-5][0-9]$/.test(value);
  }

  public static async getFilter(text) {
    let filter;
    const operators = [/\<\=/, /\<\>/, /\>\=/, /\</, /\>/, /\bnot in\b/, /\bin\b/, /\=/];
    let done = false;
    await CollectionUtil.asyncForEach(operators, async op => {
      var re = new RegExp(op, 'gi');
      const parts = text.split(re);

      if (parts.length === 2 && !done) {
        filter = {
          columnName: parts[0].trim(),
          operator: op.toString().replace(/\\b/g, '').replace(/\//g, '').replace(/\\/g, '').replace(/\b/g, ''),
          value: parts[1].trim()
        };

        // Swaps values and names in case of IN operators.

        if (filter.operator === 'not in' || filter.operator === 'in') {
          const columnName = filter.columnName;
          filter.columnName = filter.value;
          filter.value = columnName;
        }

        done = true;
      }
    });

    return filter;
  };



  /**
   * Finds a value or multi-value results in a tabular file.
   *
   * @example
   *
   *  rows = FIND "file.xlsx", "A2=active", "A2 < 12/06/2010 15:00"
   *  i = 1
   *  do while i <= ubound(row)
   *    row = rows[i]
   *    send sms to "+" + row.mobile, "Hello " + row.name + "! "
   *  loop
   * @see NPM package data-forge
   *
   */
  public async find({ pid, handle, args }): Promise<any> {
    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    const file = args[0];
    args.shift();

    const botId = min.instance.botId;
    const path = DialogKeywords.getGBAIPath(botId, 'gbdata');

    // MAX LINES property.

    let maxLines = 5000;
    if (params && params.maxLines) {
      if (params.maxLines.toString().toLowerCase() !== 'default') {
        maxLines = Number.parseInt(params.maxLines).valueOf();
      }
    } else {
      maxLines = maxLines;
    }
    GBLog.info(`BASIC: FIND running on ${file} (maxLines: ${maxLines}) and args: ${JSON.stringify(args)}...`);

    // Choose data sources based on file type (HTML Table, data variable or sheet file)

    let results;
    let header, rows;
    let page;
    if (handle) {
      page = WebAutomationServices.getPageByHandle(handle);
    }

    if (handle && page['$eval'] && WebAutomationServices.isSelector(file)) {
      const container = page['frame'] ? page['frame'] : page;
      const originalSelector = file;

      // Transforms table

      const resultH = await container.evaluate(originalSelector => {
        const rows = document.querySelectorAll(`${originalSelector} tr`);
        return Array.from(rows, row => {
          const columns = row.querySelectorAll('th');
          return Array.from(columns, column => column.innerText);
        });
      }, originalSelector);

      const result = await container.evaluate(originalSelector => {
        const rows = document.querySelectorAll(`${originalSelector} tr`);
        return Array.from(rows, row => {
          const columns = row.querySelectorAll('td');
          return Array.from(columns, column => column.innerText);
        });
      }, originalSelector);

      header = [];
      for (let i = 0; i < resultH[0].length; i++) {
        header[i] = resultH[0][i];
      }

      rows = [];
      rows[0] = header;
      for (let i = 1; i < result.length; i++) {
        rows[i] = result[i];
      }
    } else if (file['cTag']) {
      const gbaiName = DialogKeywords.getGBAIPath(min.botId);
      const localName = Path.join('work', gbaiName, 'cache', `csv${GBAdminService.getRndReadableIdentifier()}.csv`);
      const url = file['@microsoft.graph.downloadUrl'];
      const response = await fetch(url);
      Fs.writeFileSync(localName, Buffer.from(await response.arrayBuffer()), { encoding: null });

      var workbook = new Excel.Workbook();
      const worksheet = await workbook.csv.readFile(localName);
      header = [];
      rows = [];

      for (let i = 0; i < worksheet.rowCount; i++) {
        const r = worksheet.getRow(i + 1);
        let outRow = [];
        for (let j = 0; j < r.cellCount; j++) {
          outRow.push(r.getCell(j + 1).text);
        }

        if (i == 0) {
          header = outRow;
        } else {
          rows.push(outRow);
        }
      }
    } else if (file.indexOf('.xlsx') !== -1) {
      let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

      let document;
      document = await this.internalGetDocument(client, baseUrl, path, file);

      // Creates workbook session that will be discarded.

      let sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();

      results = await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='A1:CZ${maxLines}')`
        )
        .get();

      header = results.text[0];
      rows = results.text;
    } else {
      const t = this.getTableFromName(file, min);

      if (!t) {
        throw new Error(`TABLE ${file} not found. Check TABLE keywords.`);
      }

      const systemFilter = await SystemKeywords.getFilter(args[0]);
      let filter = {};
      filter[systemFilter.columnName] = systemFilter.value;
      const res = await t.findAll({ where: filter });

      return res.length > 1 ? res : res[0];
    }


    const contentLocale = min.core.getParam(
      min.instance,
      'Default Content Language',
      GBConfigService.get('DEFAULT_CONTENT_LANGUAGE')
    );

    // Increments columnIndex by looping until find a column match.

    const filters = [];
    let predefinedFilterTypes;
    if (params.filterTypes) {
      predefinedFilterTypes = params.filterTypes.split(',');
    }

    let filterIndex = 0;
    await CollectionUtil.asyncForEach(args, async arg => {
      const filter = await SystemKeywords.getFilter(arg);
      if (!filter) {
        throw new Error(`BASIC: FIND filter has an error: ${arg} check this and publish .gbdialog again.`);
      }

      let columnIndex = 0;
      for (; columnIndex < header.length; columnIndex++) {
        if (header[columnIndex].toLowerCase() === filter.columnName.toLowerCase()) {
          break;
        }
      }
      filter.columnIndex = columnIndex;
      const fixed = predefinedFilterTypes ? predefinedFilterTypes[filterIndex] : null;

      if (this.isValidHour(filter.value)) {
        filter.dataType = fixed ? fixed : 'hourInterval';
      } else if (await this.isValidDate({ pid, dt: filter.value })) {
        filter.value = SystemKeywords.getDateFromLocaleString(pid, filter.value, contentLocale);
        filter.dataType = fixed ? fixed : 'date';
      } else if (await this.isValidNumber({ pid, number: filter.value })) {
        filter.value = Number.parseInt(filter.value);
        filter.dataType = fixed ? fixed : 'number';
      } else {
        filter.value = filter.value;
        filter.dataType = fixed ? fixed : 'string';
      }
      filters.push(filter);
      filterIndex++;
    });

    // As BASIC uses arrays starting with 1 (one) as index,
    // a ghost element is added at 0 (zero) position.

    let table = [];
    table.push({ gbarray: '0' });
    let foundIndex = 1;

    // Fills the row variable.

    let rowCount = 0;
    for (; foundIndex < rows.length; foundIndex++) {
      let filterAcceptCount = 0;
      await CollectionUtil.asyncForEach(filters, async filter => {
        let result = rows[foundIndex][filter.columnIndex];
        let wholeWord = true;
        if (user && params && params.wholeWord) {
          wholeWord = params.wholeWord;
        }
        if (!result) {
          return;
        }

        switch (filter.dataType) {
          case 'string':
            const v1 = GBConversationalService.removeDiacritics(result.toLowerCase().trim());
            const v2 = GBConversationalService.removeDiacritics(filter.value.toLowerCase().trim());
            GBLog.info(`FIND filter: ${v1} ${filter.operator} ${v2}.`);

            switch (filter.operator) {
              case '=':
                if (v1 === v2) {
                  filterAcceptCount++;
                }
                break;
              case '<>':
                if (v1 !== v2) {
                  filterAcceptCount++;
                }
                break;
              case 'not in':
                if (v1.indexOf(v2) === -1) {
                  filterAcceptCount++;
                }
                break;
              case 'in':
                if (wholeWord) {
                  if (v1 === v2) {
                    filterAcceptCount++;
                  }
                } else {
                  if (v1.indexOf(v2) > -1) {
                    filterAcceptCount++;
                  }
                }
                break;
            }
            break;
          case 'number':
            switch (filter.operator) {
              case '=':
                if (Number.parseInt(result) === filter.value) {
                  filterAcceptCount++;
                }
                break;
            }
            break;

          case 'hourInterval':
            switch (filter.operator) {
              case '=':
                if (v1 === v2) {
                  filterAcceptCount++;
                }
                break;
              case 'in':
                const e = result.split(';');
                const hr = Number.parseInt(filter.value.split(':')[0]);
                let lastHour = Number.parseInt(e[0]);
                let found = false;
                await CollectionUtil.asyncForEach(e, async hour => {
                  if (!found && lastHour <= hr && hr <= hour) {
                    filterAcceptCount++;
                    found = true;
                  }
                  lastHour = hour;
                });
                break;
            }
            break;

          case 'date':
            if (result.charAt(0) === "'") {
              result = result.substr(1);
            }
            const resultDate = SystemKeywords.getDateFromLocaleString(pid, result, contentLocale);
            if (resultDate) {
              if (filter.value['dateOnly']) {
                resultDate.setHours(0, 0, 0, 0);
              }
              switch (filter.operator) {
                case '=':
                  if (resultDate.getTime() == filter.value.getTime()) filterAcceptCount++;
                  break;
                case '<':
                  if (resultDate.getTime() < filter.value.getTime()) filterAcceptCount++;
                  break;
                case '>':
                  if (resultDate.getTime() > filter.value.getTime()) filterAcceptCount++;
                  break;
                case '<=':
                  if (resultDate.getTime() <= filter.value.getTime()) filterAcceptCount++;
                  break;
                case '>=':
                  if (resultDate.getTime() >= filter.value.getTime()) filterAcceptCount++;
                  break;
              }
              break;
            }
        }
      });

      if (filterAcceptCount === filters.length) {
        rowCount++;
        let row = {};
        const xlRow = rows[foundIndex];
        for (let colIndex = 0; colIndex < xlRow.length; colIndex++) {
          const propertyName = header[colIndex];
          let value = xlRow[colIndex];
          if (value && value.charAt(0) === "'") {
            if (await this.isValidDate({ pid, dt: value.substr(1) })) {
              value = value.substr(1);
            }
          }
          row[propertyName] = value;
        }
        row['ordinal'] = rowCount;
        row['line'] = foundIndex + 1;

        table.push(row);
      }
    }

    const outputArray = await DialogKeywords.getOption({ pid, name: 'output' });

    if (table.length === 1) {
      GBLog.info(`BASIC: FIND returned no results (zero rows).`);
      return null;
    } else if (table.length === 2 && !outputArray) {
      GBLog.info(`BASIC: FIND returned single result: ${table[0]}.`);
      return table[1];
    } else {
      GBLog.info(`BASIC: FIND returned multiple results (Count): ${table.length - 1}.`);
      return table;
    }
  }

  public static getDateFromLocaleString(pid, date: any, contentLocale: any) {
    let ret = null;
    let parts = /^([0-3]?[0-9]).([0-3]?[0-9]).((?:[0-9]{2})?[0-9]{2})\s*(10|11|12|0?[1-9]):([0-5][0-9])/gi.exec(date);
    if (parts && parts[5]) {
      switch (contentLocale) {
        case 'pt':
          ret = new Date(
            Number.parseInt(parts[3]),
            Number.parseInt(parts[2]) - 1,
            Number.parseInt(parts[1]),
            Number.parseInt(parts[4]),
            Number.parseInt(parts[5]),
            0,
            0
          );
          break;
        case 'en':
          ret = new Date(
            Number.parseInt(parts[3]),
            Number.parseInt(parts[1]) - 1,
            Number.parseInt(parts[2]),
            Number.parseInt(parts[4]),
            Number.parseInt(parts[5]),
            0,
            0
          );
          break;
      }

      ret['dateOnly'] = false;
    }

    parts = /^([0-3]?[0-9]).([0-3]?[0-9]).((?:[0-9]{2})?[0-9]{2})$/gi.exec(date);
    if (parts && parts[3]) {
      switch (contentLocale) {
        case 'pt':
          ret = new Date(
            Number.parseInt(parts[3]),
            Number.parseInt(parts[2]) - 1,
            Number.parseInt(parts[1]),
            0,
            0,
            0,
            0
          );
          break;
        case 'en':
          ret = new Date(
            Number.parseInt(parts[3]),
            Number.parseInt(parts[1]) - 1,
            Number.parseInt(parts[2]),
            0,
            0,
            0,
            0
          );
          break;
      }

      ret['dateOnly'] = true;
    }
    return ret;
  }

  public async setSystemPrompt({ pid, text }) {

    let { min, user } = await DialogKeywords.getProcessInfo(pid);

    if (user) {
      ChatServices.userSystemPrompt[user.userSystemId] = text;

      const path = DialogKeywords.getGBAIPath(min.botId);
      const systemPromptFile = urlJoin(process.cwd(), 'work', path, 'users',user.userSystemId, 'systemPrompt.txt');
      Fs.writeFileSync(systemPromptFile, text);
    }
  }


  /**
   * Creates a folder in the bot instance drive.
   *
   * @example folder = CREATE FOLDER "notes\01"
   *
   */
  public async createFolder({ pid, name }) {
    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const botId = min.instance.botId;
    let path = DialogKeywords.getGBAIPath(min.botId, `gbdrive`);

    // Extracts each part of path to call create folder to each
    // one of them.

    name = name.replace(/\\/gi, '/');
    const parts = name.split('/');
    let lastFolder = null;

    // Creates each subfolder.

    await CollectionUtil.asyncForEach(parts, async item => {
      // Calls drive API.

      const body = {
        name: item,
        folder: {},
        '@microsoft.graph.conflictBehavior': 'fail'
      };

      try {
        lastFolder = await client.api(`${baseUrl}/drive/root:/${path}:/children`).post(body);
      } catch (error) {
        if (error.code !== 'nameAlreadyExists') {
          throw error;
        } else {
          lastFolder = await client.api(`${baseUrl}/drive/root:/${urlJoin(path, item)}`).get();
        }
      }

      // Increments path to the next child be created.

      path = urlJoin(path, item);
    });
    return lastFolder;
  }

  /**
   * Shares a folder from the drive to a e-mail recipient.
   *
   * @example
   *
   * folder = CREATE FOLDER "notes\10"
   * SHARE FOLDER folder, "nome@domain.com", "E-mail message"
   *
   */
  public async shareFolder({ pid, folder, email, message }) {
    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const path = DialogKeywords.getGBAIPath(min.botId, `gbdrive`);
    const root = urlJoin(path, folder);

    const src = await client.api(`${baseUrl}/drive/root:/${root}`).get();

    const driveId = src.parentReference.driveId;
    const itemId = src.id;
    const body = {
      recipients: [{ email: email }],
      message: message,
      requireSignIn: true,
      sendInvitation: true,
      roles: ['write']
    };

    await client.api(`https://graph.microsoft.com/v1.0/drives/${driveId}/items/${itemId}/invite`).post(body);
  }

  public async internalCreateDocument(min, path, content) {
    GBLog.info(`BASIC: CREATE DOCUMENT '${path}...'`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const gbaiName = DialogKeywords.getGBAIPath(min.botId);
    const tmpDocx = urlJoin(gbaiName, path);

    // Templates a blank {content} tag inside the blank.docx.

    const blank = Path.join(process.env.PWD, 'blank.docx');
    let buf = Fs.readFileSync(blank);
    let zip = new PizZip(buf);
    let doc = new Docxtemplater();
    doc.setOptions({ linebreaks: true });
    doc.loadZip(zip);
    doc.setData({ content: content }).render();
    buf = doc.getZip().generate({ type: 'nodebuffer', compression: 'DEFLATE' });

    // Performs the upload.

    await client.api(`${baseUrl}/drive/root:/${tmpDocx}:/content`).put(buf);
  }

  public async createDocument({ pid, path, content }) {
    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    this.internalCreateDocument(min, path, content);
  }

  /**
   * Copies a drive file from a place to another .
   *
   * @example
   *
   * COPY "template.xlsx", "reports\" + customerName + "\final.xlsx"
   *
   */
  public async copyFile({ pid, src, dest }) {
    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: BEGINING COPY '${src}' to '${dest}'`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const botId = min.instance.botId;

    // Normalizes all slashes.

    src = src.replace(/\\/gi, '/');
    dest = dest.replace(/\\/gi, '/');

    // Determines full path at source and destination.

    const root = DialogKeywords.getGBAIPath(botId, 'gbdrive');
    const srcPath = urlJoin(root, src);
    const dstPath = urlJoin(root, dest);

    // Checks if the destination contains subfolders that
    // need to be created.

    let folder;
    if (dest.indexOf('/') !== -1) {
      const pathOnly = Path.dirname(dest);
      folder = await this.createFolder({ pid, name: pathOnly });
    } else {
      folder = await client.api(`${baseUrl}/drive/root:/${root}`).get();
    }

    // Performs the copy operation getting a reference
    // to the source and calling /copy on drive API.

    try {
      const srcFile = await client.api(`${baseUrl}/drive/root:/${srcPath}`).get();
      const destFile = {
        parentReference: { driveId: folder.parentReference.driveId, id: folder.id },
        name: `${Path.basename(dest)}`
      };
      const file = await client.api(`${baseUrl}/drive/items/${srcFile.id}/copy`).post(destFile);
      GBLog.info(`BASIC: FINISHED COPY '${src}' to '${dest}'`);
      return file;
    } catch (error) {
      if (error.code === 'itemNotFound') {
        GBLog.info(`BASIC: COPY source file not found: ${srcPath}.`);
      } else if (error.code === 'nameAlreadyExists') {
        GBLog.info(`BASIC: COPY destination file already exists: ${dstPath}.`);
      }
      throw error;
    }
  }

  /**
   * Converts a drive file from a place to another .
   *
   * Supported sources csv, doc, docx, odp, ods, odt, pot, potm, potx, pps,
   * ppsx, ppsxm, ppt, pptm, pptx, rtf, xls, xlsx
   *
   * @example
   *
   * CONVERT "customers.xlsx" TO "reports\" + today + ".pdf"
   *
   */
  public async convert({ pid, src, dest }) {

    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: CONVERT '${src}' to '${dest}'`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    const botId = min.instance.botId;

    // Normalizes all slashes.

    src = src.replace(/\\/gi, '/');
    dest = dest.replace(/\\/gi, '/');

    // Determines full path at source and destination.
    const path = DialogKeywords.getGBAIPath(min.botId, `gbdrive`);
    const root = path;
    const srcPath = urlJoin(root, src);
    const dstPath = urlJoin(path, dest);

    // Checks if the destination contains subfolders that
    // need to be created.

    let folder;
    if (dest.indexOf('/') !== -1) {
      const pathOnly = Path.dirname(dest);
      folder = await this.createFolder({ pid, name: pathOnly });
    } else {
      folder = await client.api(`${baseUrl}/drive/root:/${root}`).get();
    }

    // Performs the conversion operation getting a reference
    // to the source and calling /content on drive API.

    try {
      const res = await client.api(`${baseUrl}/drive/root:/${srcPath}:/content?format=pdf`).get();

      const streamToBuffer = stream => {
        const chunks = [];
        return new Promise((resolve, reject) => {
          stream.on('data', chunk => chunks.push(chunk));
          stream.on('error', reject);
          stream.on('end', () => resolve(Buffer.concat(chunks)));
        });
      };

      const result = await streamToBuffer(res);

      await client.api(`${baseUrl}/drive/root:/${dstPath}:/content`).put(result);
    } catch (error) {
      if (error.code === 'itemNotFound') {
        GBLog.info(`BASIC: CONVERT source file not found: ${srcPath}.`);
      } else if (error.code === 'nameAlreadyExists') {
        GBLog.info(`BASIC: CONVERT destination file already exists: ${dstPath}.`);
      }
      throw error;
    }
  }

  /**
   * Generate a secure and unique password.
   *
   * @example pass = PASSWORD
   *
   */
  public generatePassword(pid) {
    return GBAdminService.getRndPassword();
  }

  private flattenJSON(obj, res = {}, separator = '_', parent = null) {
    for (let key in obj) {
      if (typeof obj[key] === 'function') {
        continue;
      }
      if (typeof obj[key] !== 'object' || obj[key] instanceof Date) {

        // If not defined already add the flattened field.

        const newKey = `${parent ? (parent + separator) : ''}${key}`;
        if (!res[newKey]) {
          res[newKey] = obj[key];
        }
        else {
          GBLog.verbose(`Ignoring duplicated field in flatten operation to storage: ${key}.`);
        }

      } else {
        obj[key] = this.flattenJSON(obj[key], res, separator, `${parent ? parent + separator : ''}${key}`);
      };
    };
    return res;
  }

  public async getCustomToken({ pid, tokenName }) {

    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLogEx.info(min, `BASIC internal getCustomToken: ${tokenName}`);

    const token = await (min.adminService as any)['acquireElevatedToken']
      (min.instance.instanceId, false,
        tokenName,
        min.core.getParam(min.instance, `${tokenName} Client ID`, null),
        min.core.getParam(min.instance, `${tokenName} Client Secret`, null),
        min.core.getParam(min.instance, `${tokenName} Host`, null),
        min.core.getParam(min.instance, `${tokenName} Tenant`, null)
      );
    const expiresOn = await min.adminService.getValue(min.instance.instanceId, `${tokenName}expiresOn`);

    return { token, expiresOn };
  }


  /**
   * Calls any REST API by using GET HTTP method.
   *
   * @example user = get "http://server/users/1"
   *
   */
  public async getByHttp({ pid, url, headers, username, ps, qs }) {
    let options = {};

    const { min, user, params, proc } = await DialogKeywords.getProcessInfo(pid);
    GBLogEx.info(min, `GET: ${url}`);

    let pageMode = await DialogKeywords.getOption({ pid, name: 'pageMode' });
    let continuationToken = await
      DialogKeywords.getOption({ pid, name: `${proc.executable}-continuationToken` });

    if (pageMode === "auto" && continuationToken) {
      headers = headers ? headers : {};

      headers['MS-ContinuationToken'] = continuationToken;
    }

    if (headers) {
      options['headers'] = headers;
    }

    if (username) {
      options['auth'] = {
        user: username,
        pass: ps
      };
    }
    if (qs) {
      options['qs'] = qs;
    }
    let result;
    await retry(
      async (bail) => {

        result = await fetch(url, options);


        if (result.status === 401) {
          GBLog.info(`Waiting 5 secs. before retrynig HTTP 401 GET: ${url}`);
          await GBUtil.sleep(5 * 1000);
          throw new Error(`BASIC: HTTP:${result.status} retry: ${result.statusText}.`);
        }
        if (result.status === 429) {
          GBLog.info(`Waiting 1min. before retrying HTTP 429 GET: ${url}`);
          await GBUtil.sleep(60 * 1000);
          throw new Error(`BASIC: HTTP:${result.status} retry: ${result.statusText}.`);
        }
        if (result.status === 503) {
          GBLog.info(`Waiting 1h before retrynig GET 503: ${url}`);
          await GBUtil.sleep(60 * 60 * 1000);
          throw new Error(`BASIC: HTTP:${result.status} retry: ${result.statusText}.`);
        }

        if (result.status === 2000) {

          // Token expired.

          await DialogKeywords.setOption({ pid, name: `${proc.executable}-continuationToken`, value: null });
          bail(new Error(`Expired Token for ${url}.`));


        }
        if (result.status != 200) {
          throw new Error(`BASIC: GET ${result.status}: ${result.statusText}.`);
        }

      },
      {
        retries: 5,
        onRetry: (err) => { GBLog.error(`Retrying HTTP GET due to: ${err.message}.`); }
      }
    );
    let res = JSON.parse(await result.text());


    function process(key, value, o) {
      if (value === '0000-00-00') {
        o[key] = null;
      }

    }

    function traverse(o, func) {
      for (var i in o) {
        func.apply(this, [i, o[i], o]);
        if (o[i] !== null && typeof (o[i]) == "object") {
          traverse(o[i], func);
        }
      }
    }

    traverse(res, process);


    if (pageMode === "auto") {

      continuationToken = res.next?.headers['MS-ContinuationToken'];

      if (continuationToken) {
        GBLog.info(`Updating continuationToken for ${url}.`);
        await DialogKeywords.setOption({ pid, name: 'continuationToken', value: continuationToken });
      }
    }
    else {
      pageMode = "none";
    }

    if (res) { res['pageMode'] = pageMode; }

    return res;

  }

  /**
   * Calls any REST API by using POST HTTP method.
   *
   * @example
   *
   * user = put "http://server/path", "data"
   * talk "The updated user area is" + area
   *
   */
  public async putByHttp({ pid, url, data, headers }) {
    const options = {
      json: data,
      headers: headers,
      method: 'PUT'
    };

    if (typeof (data) === 'object') {
      options['body'] = JSON.stringify(data);
      options.headers['Content-Type'] = 'application/json';
    }
    else {
      options['body'] = data;
    }

    let result = await fetch(url, options);
    const text = await result.text();
    GBLog.info(`BASIC: PUT ${url} (${data}): ${text}`);

    if (result.status != 200 && result.status != 201) {
      throw new Error(`BASIC: PUT ${result.status}: ${result.statusText}.`)
    }

    let res = JSON.parse(text);
    return res;
  }

  /**
   * Calls any REST API by using POST HTTP method.
   *
   * @example
   *
   * user = post "http://server/path", "data"
   * talk "The updated user area is" + area
   *
   */
  public async postByHttp({ pid, url, data, headers }) {
    const options = {
      headers: headers,
      method: 'POST'
    };

    if (typeof (data) === 'object') {
      options['body'] = JSON.stringify(data);
      options.headers['Content-Type'] = 'application/json';
    }
    else {
      options['body'] = data;
    }

    let result = await fetch(url, options);
    const text = await result.text();
    GBLog.info(`BASIC: POST ${url} (${data}): ${text}`);

    if (result.status != 200 && result.status != 201) {
      throw new Error(`BASIC: POST ${result.status}: ${result.statusText}.`)
    }

    let res = JSON.parse(text);
    return res;
  }

  public async numberOnly({ pid, text }) {
    return text.replace(/\D/gi, '');
  }

  //Create a CREAT LEAD keyword
  public async createLead({ pid, templateName, data }) {
    //OAuth Token Endpoint (from your Azure App Registration)
    const authorityUrl = 'https://login.microsoftonline.com/<COPY A GUID HERE>';
    const msalConfig = {
      auth: {
        authority: authorityUrl,
        clientId: process.env.DYNAMICS_CLIENTID,
        clientSecret: process.env.DYNAMICS_CLIENTSECRET,
        knownAuthorities: ['login.microsoftonline.com']
      }
    };
    const cca = new MSAL.ConfidentialClientApplication(msalConfig);
    const serverUrl = ` `;

    //function that acquires a token and passes it to DynamicsWebApi
    const acquireToken = dynamicsWebApiCallback => {
      cca
        .acquireTokenByClientCredential({
          scopes: [`${serverUrl}/.default`]
        })
        .then(response => {
          //call DynamicsWebApi callback only when a token has been retrieved successfully
          dynamicsWebApiCallback(response.accessToken);
        })
        .catch(error => {
          console.log(JSON.stringify(error));
        });
    };

    //create DynamicsWebApi
    const dynamicsWebApi = new DynamicsWebApi({
      webApiUrl: `${serverUrl}/api/data/v9.2/`,
      onTokenRefresh: acquireToken
    });
    //initialize a CRM entity record object
    var lead = {
      subject: 'Test WebAPI',
      firstname: 'Test',
      lastname: 'WebAPI',
      jobtitle: 'Title'
    };
    //call dynamicsWebApi.create function
    dynamicsWebApi
      .create(lead, 'leads')
      .then(function (id) {
        //do something with id here
      })
      .catch(function (error) {
        //catch error here
      });
  }

  /**
   *
   * Fills a .docx or .pptx with template data.
   *
   * doc = FILL "templates/template.docx", data
   *
   */
  public async fill({ pid, templateName, data }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const botId = min.instance.botId;
    const gbaiName = DialogKeywords.getGBAIPath(botId, 'gbdata');
    let localName;

    // Downloads template from .gbdrive.

    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);
    let path = '/' + urlJoin(gbaiName, `${botId}.gbdrive`);
    let template = await this.internalGetDocument(client, baseUrl, path, templateName);
    let url = template['@microsoft.graph.downloadUrl'];
    const res = await fetch(url);
    let buf: any = Buffer.from(await res.arrayBuffer());
    localName = Path.join('work', gbaiName, 'cache', `tmp${GBAdminService.getRndReadableIdentifier()}.docx`);
    Fs.writeFileSync(localName, buf, { encoding: null });

    // Replace image path on all elements of data.

    const images = [];
    let index = 0;
    path = Path.join(gbaiName, 'cache', `tmp${GBAdminService.getRndReadableIdentifier()}.docx`);
    url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(localName));

    const traverseDataToInjectImageUrl = async o => {
      for (var i in o) {
        let value = o[i];

        if (value && value.gbarray) {
          o.shift();
          value = o[i];
        }

        for (const kind of ['png', 'jpg', 'jpeg']) {
          if (value.endsWith && value.endsWith(`.${kind}`)) {
            const { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

            path = urlJoin(gbaiName, `${botId}.gbdrive`);
            if (value.indexOf('/') !== -1) {
              path = '/' + urlJoin(path, Path.dirname(value));
              value = Path.basename(value);
            }

            const ref = await this.internalGetDocument(client, baseUrl, path, value);
            let url = ref['@microsoft.graph.downloadUrl'];
            const imageName = Path.join(
              'work',
              gbaiName,
              'cache',
              `tmp${GBAdminService.getRndReadableIdentifier()}-${value}.png`
            );
            const response = await fetch(url);
            const buf = Buffer.from(await response.arrayBuffer());
            Fs.writeFileSync(imageName, buf, { encoding: null });

            const getNormalSize = ({ width, height, orientation }) => {
              return (orientation || 0) >= 5 ? [height, width] : [width, height];
            };

            const size = getNormalSize(await sharp(buf).metadata());
            url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(imageName));
            images[index++] = { url: url, size: size, buf: buf };
          }
        }
        if (o[i] !== null && typeof o[i] == 'object') {
          await traverseDataToInjectImageUrl(o[i]);
        }
      }
    };

    let indexImage = 0;
    var opts = {
      fileType: 'docx',
      centered: false,
      getImage: (tagValue, tagName) => {
        return images[indexImage].buf;
      },
      getSize: (img, tagValue, tagName) => {
        return images[indexImage++].size;
      }
    };

    // Loads the file as binary content.

    let zip = new PizZip(buf);
    let doc = new Docxtemplater();
    doc.setOptions({ paragraphLoop: true, linebreaks: true });
    doc.loadZip(zip);
    if (localName.endsWith('.pptx')) {
      doc.attachModule(pptxTemplaterModule);
    }
    doc.attachModule(new ImageModule(opts));

    await traverseDataToInjectImageUrl(data);
    doc.setData(data).render();

    buf = doc.getZip().generate({ type: 'nodebuffer', compression: 'DEFLATE' });
    Fs.writeFileSync(localName, buf, { encoding: null });

    return { localName: localName, url: url, data: buf };
  }

  public screenCapture(pid) {
    // scrcpy Disabled
    // function captureImage({ x, y, w, h }) {
    //   const pic = robot.screen.capture(x, y, w, h)
    //   const width = pic.byteWidth / pic.bytesPerPixel // pic.width is sometimes wrong!
    //   const height = pic.height
    //   const image = new Jimp(width, height)
    //   let red, green, blue
    //   pic.image.forEach((byte, i) => {
    //     switch (i % 4) {
    //       case 0: return blue = byte
    //       case 1: return green = byte
    //       case 2: return red = byte
    //       case 3:
    //         image.bitmap.data[i - 3] = red
    //         image.bitmap.data[i - 2] = green
    //         image.bitmap.data[i - 1] = blue
    //         image.bitmap.data[i] = 255
    //     }
    //   })
    //   return image
    // }
    // let file = 'out.png';
    // captureImage({ x: 60, y: 263, w: 250, h: 83 }).write(file)
    // const config = {
    //   lang: "eng",
    //   oem: 1,
    //   psm: 3,
    // }
    // tesseract.recognize(file, config).then(value => {
    //   console.log(value);
    // });
  }

  private numberToLetters(num) {
    let letters = '';
    while (num >= 0) {
      letters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'[num % 26] + letters;
      num = Math.floor(num / 26) - 1;
    }
    return letters;
  }

  private getTableFromName(file, min) {
    const minBoot = GBServer.globals.minBoot;
    const parts = file.split('.');
    const con = min[parts[0]];
    if (con) {
      return con.models[parts[1]];
    } else {
      return minBoot.core.sequelize.models[file];
    }

  }

  private cachedMerge: any = {};

  /**
   * Merges a multi-value with a tabular file using BY field as key.
   *
   * @example
   *
   *  data = FIND first.xlsx
   *  MERGE "second.xlsx" WITH data BY customer_id
   *
   */
  public async merge({ pid, file, data, key1, key2 }): Promise<any> {

    if (!data || data.length === 0) {
      GBLog.verbose(`BASIC: MERGE running on ${file}: NO DATA.`);
      return data;
    }


    GBLog.info(`BASIC: MERGE running on ${file} and key1: ${key1}, key2: ${key2}...`);
    if (!this.cachedMerge[pid]) {
      this.cachedMerge[pid] = { file: {} }
    }

    const { min, user, params } = await DialogKeywords.getProcessInfo(pid);

    // Check if is a tree or flat object.

    const hasSubObject = (t) => {
      for (var key in t) {
        if (!t.hasOwnProperty(key)) continue;
        if (typeof t[key] === "object") return true;
      }
      return false;
    }

    // MAX LINES property.

    let maxLines = 1000;
    if (user && params && params.maxLines) {
      if (params.maxLines.toString().toLowerCase() !== 'default') {
        maxLines = Number.parseInt(params.maxLines).valueOf();
      }
    }

    // Choose data sources based on file type (HTML Table, data variable or sheet file)

    let storage = file.indexOf('.xlsx') === -1;
    let results;
    let header = [], rows = [];
    let t;
    let fieldsNames = [];
    let fieldsSizes = [];
    let fieldsValuesList = [];

    if (storage) {

      t = this.getTableFromName(file, min);

      if (!t) {
        throw new Error(`TABLE ${file} not found. Check TABLE keywords.`);
      }

      Object.keys(t.fieldRawAttributesMap).forEach(e => {
        fieldsNames.push(e);
      })

      Object.keys(t.fieldRawAttributesMap).forEach(e => {
        fieldsSizes.push(t.fieldRawAttributesMap[e].size);
      })

      header = Object.keys(t.fieldRawAttributesMap);

      // In a single execution, several MERGE calls will benift
      // from caching results across calls.

      if (!this.cachedMerge[pid][file]) {
        await retry(
          async (bail) => {
            let page = 0, pageSize = 1000;
            let count = 0;

            while (page === 0 || count === pageSize) {
              const paged = await t.findAll(
                { offset: page * pageSize, limit: pageSize, subquery: false, where: {} }
              );
              rows = [...paged, ...rows];
              page++;
              count = paged.length;

              GBLog.info(`BASIC: MERGE cached: ${rows.length} from page: ${page}.`);

            }
          },
          {
            retries: 5,
            onRetry: (err) => { GBLog.error(`MERGE: Retrying SELECT ALL on table: ${err.message}.`); }
          }
        );



      }
      else {
        rows = this.cachedMerge[pid][file];
      }

    } else {

      const botId = min.instance.botId;
      const path = DialogKeywords.getGBAIPath(botId, 'gbdata');

      let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

      let document;
      document = await this.internalGetDocument(client, baseUrl, path, file);

      // Creates workbook session that will be discarded.

      let sheets = await client.api(`${baseUrl}/drive/items/${document.id}/workbook/worksheets`).get();

      results = await client
        .api(
          `${baseUrl}/drive/items/${document.id}/workbook/worksheets('${sheets.value[0].name}')/range(address='A1:CZ${maxLines}')`
        )
        .get();

      header = results.text[0];
      rows = results.text;
    }

    let table = [];
    let foundIndex = 0;

    // Fills the row variable on the base dataset.

    if (!storage || !this.cachedMerge[pid][file]) {
      for (; foundIndex < rows.length; foundIndex++) {
        let row = {};
        const tmpRow = rows[foundIndex];
        row = tmpRow.dataValues ? tmpRow.dataValues : tmpRow;

        for (let colIndex = 0; colIndex < tmpRow.length; colIndex++) {

          const propertyName = header[colIndex];
          let value = tmpRow[colIndex];

          if (value && typeof value === 'string' && value.charAt(0) === "'") {
            if (await this.isValidDate({ pid, dt: value.substr(1) })) {
              value = value.substr(1);
            }
          }

          row[propertyName] = value;
        }
        row['line'] = foundIndex + 1;
        table.push(row);
      }

      if (storage) {
        this.cachedMerge[pid][file] = table;
      }
    }
    else {
      table = this.cachedMerge[pid][file];
    }

    let key1Index, key2Index;

    if (key1) {
      key1Index = _.invertBy(table, key1);
    }

    if (key2) {
      key2Index = _.invertBy(table, key2);
    }

    let updates = 0,
      adds = 0, skipped = 0;

    // Scans all items in incoming data.

    for (let i = 0; i < data.length; i++) {

      // Scans all sheet lines and compare keys.

      let row = data[i];

      if (hasSubObject(row)) {
        row = this.flattenJSON(row);
      }

      let found;
      let key1Value;
      let key1Original = key1;
      if (key1Index) {

        key1 = key1.charAt(0).toLowerCase() + key1.slice(1);

        Object.keys(row).forEach(e => {
          if (e.toLowerCase() === key1.toLowerCase()) {
            key1Value = row[e];
          }
        });

        const foundRow = key1Index[key1Value];
        if (foundRow) {
          found = table[foundRow[0]];
        }
      }

      if (found) {
        let merge = false;
        for (let j = 0; j < header.length; j++) {

          const columnName = header[j];
          let columnNameFound = false;

          let value;
          Object.keys(row).forEach(e => {

            if (columnName.toLowerCase() === e.toLowerCase()) {
              value = row[e];
              if (typeof (value) === 'string') {
                value = value.substring(0, fieldsSizes[j]);
              }

              columnNameFound = true;
            }
          });

          if (value === undefined) { value = null; }

          let valueFound;
          Object.keys(found).forEach(e => {
            if (columnName.toLowerCase() === e.toLowerCase()) {
              valueFound = found[e];
            }
          });

          const equals =
            typeof (value) === 'string' && typeof (valueFound) === 'string' ?
              value?.toLowerCase() != valueFound?.toLowerCase() :
              value != valueFound;

          if (equals && columnNameFound) {

            if (storage) {

              let obj = {};
              obj[columnName] = value;
              let criteria = {};
              criteria[key1Original] = key1Value;

              await retry(
                async (bail) => {
                  await t.update(obj, { where: criteria });
                }, { retries: 5 }
              );

            } else {

              const cell = `${this.numberToLetters(j)}${i + 1}`;
              const address = `${cell}:${cell}`;

              await this.set({ pid, handle: null, file, address, value });
            }
            merge = true;
          }

        }

        merge ? updates++ : skipped++;

      } else {

        let fieldsValues = [];

        for (let j = 0; j < fieldsNames.length; j++) {
          let add = false;
          Object.keys(row).forEach(p => {
            if (fieldsNames[j].toLowerCase() === p.toLowerCase()) {

              let value = row[p];
              if (typeof (value) === 'string') {
                value = value.substring(0, fieldsSizes[j]);
              }

              fieldsValues.push(value);
              add = true;
            }
          });
          if (!add) {
            fieldsValues.push(null);
          }
        }

        if (storage) {


          // Uppercases fields.

          const dst = {};
          let i = 0;
          Object.keys(fieldsValues).forEach(fieldSrc => {
            const name = fieldsNames[i];
            const field = name.charAt(0).toUpperCase() + name.slice(1);
            dst[field] = fieldsValues[fieldSrc];
            i++;
          });

          fieldsValuesList.push(dst);
          this.cachedMerge[pid][file].push(dst);
        }
        else {
          await this.save({ pid, file, args: fieldsValues });

        }
        adds++;
      }
    }

    // In case of storage, persist to DB in batch.

    if (fieldsValuesList.length) {
      await this.saveToStorageBatch({ pid, table: file, rows: fieldsValuesList });
    }

    GBLog.info(`BASIC: MERGE results: adds:${adds}, updates:${updates} , skipped: ${skipped}.`);
    return { title:file, adds, updates, skipped };
  }

  /**
   * Publishs a tweet to X.
   *
   * TWEET "My tweet text"
   */
  public async tweet({ pid, text }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);

    const consumer_key = min.core.getParam(min.instance, 'Twitter Consumer Key', null);
    const consumer_secret = min.core.getParam(min.instance, 'Twitter Consumer Key Secret', null);
    const access_token_key = min.core.getParam(min.instance, 'Twitter Access Token', null);
    const access_token_secret = min.core.getParam(min.instance, 'Twitter Access Token Secret', null);

    if (!consumer_key || !consumer_secret || !access_token_key || !access_token_secret) {
      GBLog.info('Twitter not configured in .gbot.');
    }

    const client = new TwitterApi({
      appKey: consumer_key,
      appSecret: consumer_secret,
      accessToken: access_token_key,
      accessSecret: access_token_secret
    });

    await client.v2.tweet(text);
    GBLog.info(`Twitter Automation: ${text}.`);
  }

  /**
   * HEAR description
   * text = REWRITE description
   * SAVE "logs.xlsx", username, text
   */
  public async rewrite({ pid, text }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);
    const prompt = `rewrite this sentence in a better way: ${text}`;
    const answer = await ChatServices.continue(min, prompt, 0);
    GBLog.info(`BASIC: REWRITE ${text} TO ${answer}`);
    return answer;
  }

  /**
   *
   * qrcode = PAY "10000", "Name", 100
   * SEND FILE qrcode
   *
   */
  public async pay({ pid, orderId, customerName, ammount }) {
    const { min, user } = await DialogKeywords.getProcessInfo(pid);

    const gbaiName = DialogKeywords.getGBAIPath(min.botId);

    const merchantId = min.core.getParam(min.instance, 'Merchant ID', null);
    const merchantKey = min.core.getParam(min.instance, 'Merchant Key', null);

    if (!merchantId || !merchantKey) {
      throw new Error('Payment not configured in .gbot.');
    }

    const apiUrl = 'https://apisandbox.cieloecommerce.cielo.com.br/1/sales/';
    const requestId = GBAdminService.generateUuid();

    GBLog.info(`GBPay: ${requestId}, ${orderId}, ${ammount}... `);

    const requestData = {
      MerchantOrderId: orderId,
      Customer: {
        Name: customerName
      },
      Payment: {
        Type: 'qrcode',
        Amount: ammount,
        Installments: 1,
        Capture: false,
        Modality: 'Debit'
      }
    };

    const response = await fetch(apiUrl, {
      method: 'POST',
      body: JSON.stringify(requestData),
      headers: {
        'Content-Type': 'application/json',
        MerchantId: merchantId,
        MerchantKey: merchantKey,
        RequestId: requestId
      }
    });

    if (!response.ok) {
      throw new Error(`HTTP error! Status: ${response.status}`);
    }
    const data = await response.json();

    // Prepare an image on cache and return the GBFILE information.

    const buf = Buffer.from(data.Payment.QrCodeBase64Image, 'base64');
    const localName = Path.join('work', gbaiName, 'cache', `qr${GBAdminService.getRndReadableIdentifier()}.png`);
    Fs.writeFileSync(localName, buf, { encoding: null });
    const url = urlJoin(GBServer.globals.publicAddress, min.botId, 'cache', Path.basename(localName));

    GBLog.info(`GBPay: ${data.MerchantOrderId} OK: ${url}.`);

    return {
      name: Path.basename(localName),
      localName: localName,
      url: url,
      data: buf,
      text: data.Payment.QrCodeString
    };
  }

  /**
   * HEAR logo AS FILE
   * file = AUTO SAVE logo
   * TALK "Your " + file.name + " file is saved."
   */
  public async autoSave({ pid, handle }) {
    const { min } = await DialogKeywords.getProcessInfo(pid);
    this.internalAutoSave({ min, handle });
  }

  private async internalAutoSave({ min, handle }) {
    const file = GBServer.globals.files[handle];
    GBLog.info(`BASIC: Auto saving '${file.filename}' (SAVE file).`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

    const path = DialogKeywords.getGBAIPath(min.botId, `gbdrive`);
    const fileName = file.url ? file.url : file.name;
    const contentType = mime.lookup(fileName);
    const ext = Path.extname(fileName).substring(1);
    const kind = await this.getExtensionInfo(ext);

    let d = new Date(),
      month = '' + (d.getMonth() + 1),
      day = '' + d.getDate(),
      year = d.getFullYear();

    const today = [day, month, year].join('-');
    const result = await client
      .api(`${baseUrl}/drive/root:/${path}/${today}/${kind.category}/${fileName}:/content`)
      .put(file.data);

    return { contentType, ext, kind, category: kind['category'] };
  }

  public async deleteFromStorage({ pid, table, criteria }) {
    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: DELETE (storage) '${table}' where ${criteria}.`);

    const definition = this.getTableFromName(table, min);
    const filter = await SystemKeywords.getFilter(criteria);

    await retry(
      async (bail) => {
        const options = { where: {} };
        options.where = {};

        options.where[filter['columnName']] = filter['value'];
        await definition.destroy(options);

      },
      {
        retries: 5,
        onRetry: (err) => { GBLog.error(`Retrying SaveToStorageBatch due to: ${err.message}.`); }
      }
    );

  }

  public async deleteFile({ pid, file }) {
    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLog.info(`BASIC: DELETE '${file.name}'.`);
    let { baseUrl, client } = await GBDeployer.internalGetDriveClient(min);

    const gbaiPath = DialogKeywords.getGBAIPath(min.botId);
    const fileName = file.name;
    const contentType = mime.lookup(fileName);
    const ext = Path.extname(fileName).substring(1);
    const kind = await this.getExtensionInfo(ext);

    await client
      .api(`${baseUrl}/drive/root:/${gbaiPath}/${file.path}`)
      .delete();

    return { contentType, ext, kind, category: kind['category'] };
  }


  public async getExtensionInfo(ext: any): Promise<any> {
    let array = exts.filter((v, i, a) => a[i]['extension'] === ext);
    if (array[0]) {
      return array[0];
    }
    return { category: 'Other', description: 'General documents' };
  }

  /**
 * Loads all para from tabular file Config.xlsx.
 */
  public async dirFolder({ pid, remotePath, baseUrl = null, client = null, array = null }) {

    const { min } = await DialogKeywords.getProcessInfo(pid);
    GBLogEx.info(min, `dirFolder: remotePath=${remotePath}, baseUrl=${baseUrl}`);

    // In case of empty files, build an zero element array.

    if (!array) {
      array = [];
    }

    if (!baseUrl) {
      let obj = await GBDeployer.internalGetDriveClient(min);
      baseUrl = obj.baseUrl;
      client = obj.client;
    }

    remotePath = remotePath.replace(/\\/gi, '/');

    // Retrieves all files in remote folder.

    let path = DialogKeywords.getGBAIPath(min.botId);
    path = urlJoin(path, remotePath);
    let url = `${baseUrl}/drive/root:/${path}:/children`;

    const res = await client.api(url).get();
    const documents = res.value;
    if (documents === undefined || documents.length === 0) {
      GBLogEx.info(min, `${remotePath} is an empty folder.`);
      return array;
    }

    // Navigate files / directory to recurse.

    await CollectionUtil.asyncForEach(documents, async item => {

      if (item.folder) {
        remotePath = urlJoin(remotePath, item.name);
        array = [...array, ... await this.dirFolder({ pid, remotePath, baseUrl, client, array })];

      } else {

        // TODO:  https://raw.githubusercontent.com/ishanarora04/quickxorhash/master/quickxorhash.js

        let obj = {};
        obj['modified'] = item.lastModifiedDateTime;
        obj['name'] = item.name;
        obj['size'] = item.size;
        obj['hash'] = item.file?.hashes?.quickXorHash;
        obj['path'] = Path.join(remotePath, item.name);
        obj['url'] = item['@microsoft.graph.downloadUrl'];

        array.push(obj);
      }
    });

    return array;
  }

  public async log({ pid, text: obj }) {

    const { min } = await DialogKeywords.getProcessInfo(pid);

    let level = 0;
    const mydump = (text, level) => {

      var dumped_text = "";

      var level_padding = "";
      for (var j = 0; j < level + 1; j++) level_padding += "    ";

      if (typeof (text) == 'object') {
        for (var item in text) {
          var value = text[item];

          if (typeof (value) == 'object') {
            dumped_text += level_padding + "'" + item + "' ...\n";
            dumped_text += mydump(value, level + 1);
          } else {
            dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
          }
        }
      } else {
        dumped_text = text + "(" + typeof (text) + ")";
      }
      return dumped_text;
    };

    GBLogEx.info(min, mydump(obj, level));

  }

}
