botserver/packages/core.gbapp/services/GBVMService.ts

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'use strict';

import { GBMinInstance, IGBCoreService } from 'botlib';
import * as fs from 'fs';
import { DialogClass } from './GBAPIService';
import { GBDeployer } from './GBDeployer';
import { TSCompiler } from './TSCompiler';
import { WaterfallDialog } from 'botbuilder-dialogs';
const util = require('util');
const logger = require('../../../src/logger');
const vm = require('vm');
const UrlJoin = require('url-join');
const vb2ts = require('vbscript-to-typescript/dist/converter');

/**
 * @fileoverview Virtualization services for emulation of BASIC.
 */

export class GBVMService implements IGBCoreService {
  private script = new vm.Script();

  public async loadJS(
    filename: string,
    min: GBMinInstance,
    core: IGBCoreService,
    deployer: GBDeployer,
    localPath: string
  ): Promise<void> {
    const path = 'packages/default.gbdialog';
    const file = 'bot.vbs';
    const source = UrlJoin(path, file);

    // Example when handled through fs.watch() listener
    fs.watchFile(source, async (curr, prev) => {
      await this.run(source, path, localPath, min, deployer, filename);
    });
    await this.run(source, path, localPath, min, deployer, filename);
    this.addHearDialog(min);
  }

  private addHearDialog(min) {
    min.dialogs.add(
      new WaterfallDialog('/hear', [
        async step => {
          step.activeDialog.state.cbId = step.options['id'];
          step.activeDialog.state.idResolve = step.options['idResolve'];

          return await step.prompt('textPrompt', {});
        },
        async step => {
          min.sandbox.context = step.context;
          min.sandbox.step = step;

          const cbId = step.activeDialog.state.cbId;
          const cb = min.cbMap[cbId];
          cb.bind({ step: step, context: step.context }); // TODO: Necessary or min.sandbox
          await cb();

          return await step.next();
        }
      ])
    );
  }

  private async run(source: any, path: string, localPath: string, min: any, deployer: GBDeployer, filename: string) {
    // Converts VBS into TS.

    vb2ts.convertFile(source);

    // Convert TS into JS.
    const tsfile = `bot.ts`;
    const tsc = new TSCompiler();
    tsc.compile([UrlJoin(path, tsfile)]);
    // Run JS into the GB context.
    const jsfile = `bot.js`;
    localPath = UrlJoin(path, jsfile);

    if (fs.existsSync(localPath)) {
      let code: string = fs.readFileSync(localPath, 'utf8');
      code = code.replace(/^.*exports.*$/gm, '');
      code = code.replace(/this\./gm, 'await this.');
      code = code.replace(/function/gm, 'async function');
      var match;
      let finalCode: string;
      let pos = 0;
      while ((match = /hear.*\(\)/.exec(code)) != null) {
        pos = match.index;
        console.log(pos);
        finalCode += code.substring(0, pos);
        let nextCode = code.substring(pos);

        // Find last }

        while ((match = /\{|\}/g.exec(nextCode)) != null) {
          console.log(match.index);
        }
      }

      //code = code.replace(/this\.hear\(\){/gm, 'this.hear(async () => { ');

      const sandbox: DialogClass = new DialogClass(min);
      const context = vm.createContext(sandbox);
      vm.runInContext(code, context);
      min.sandbox = sandbox;
      await deployer.deployScriptToStorage(min.instanceId, filename);
      logger.info(`[GBVMService] Finished loading of ${filename}`);
    }
  }

  public static async run2(source: any, path: string) {
    // Converts VBS into TS.

    //vb2ts.convertFile(source);

    // Convert TS into JS.
    const tsfile = `bot.ts`;
    const tsc = new TSCompiler();
    //tsc.compile([UrlJoin(path, tsfile)]);
    // Run JS into the GB context.
    const jsfile = `bot.js`;
    let localPath = UrlJoin(path, jsfile);

    if (fs.existsSync(localPath)) {
      let code: string = fs.readFileSync(localPath, 'utf8');
      code = code.replace(/^.*exports.*$/gm, '');
      code = code.replace(/this\./gm, 'await this.');
      code = code.replace(/function/gm, 'async function');
      var match1;
      var match2;
      let finalCode: string;
      let pos = 0;
      while ((match1 = /hear.*\(\)/.exec(code))) {
        pos = match1.index;
        console.log(pos);
        finalCode += code.substring(0, pos);
        let nextCode = code.substring(pos);

        // Find last }
        let right = 0;
        let left = 1;

        while ((match2 = /\{|\}/.exec(nextCode))) {
          let c = nextCode.substring(match2.index, match2.index+1);
          if (c === '}') {
            right++;
          } else if (c === '{') {
            left++;
          }

          nextCode = nextCode.substring(match2.index + 1);

          if (left == right)
          {
            console.log('end '+match2.index);  
          }
          console.log(match2.index);
        }
      }

      console.log(finalCode);

      //code = code.replace(/this\.hear\(\){/gm, 'this.hear(async () => { ');
    }
  }
}