smartdata/ts/smartdata.classes.db.ts

import * as plugins from './smartdata.plugins';
import { Objectmap } from '@pushrocks/lik';

import { SmartdataCollection } from './smartdata.classes.collection';

import * as mongoHelpers from './smartdata.mongohelpers';

/**
 * interface - indicates the connection status of the db
 */
export type TConnectionStatus = 'initial' | 'disconnected' | 'connected' | 'failed';

export interface ISmartdataOptions {
  /**
   * the URL to connect to
   */
  mongoDbUrl: string;

  /**
   * the db to use for the project
   */
  mongoDbName: string;

  /**
   * an optional password that will be replace <PASSWORD> in the connection string
   */
  mongoDbPass?: string;
}

export class SmartdataDb {
  smartdataOptions: ISmartdataOptions;
  mongoDbClient: plugins.mongodb.MongoClient;
  mongoDb: plugins.mongodb.Db;
  status: TConnectionStatus;
  smartdataCollectionMap = new Objectmap<SmartdataCollection<any>>();

  constructor(smartdataOptions: ISmartdataOptions) {
    this.smartdataOptions = smartdataOptions;
    this.status = 'initial';
  }

  // basic connection stuff ----------------------------------------------

  /**
   * connects to the database that was specified during instance creation
   */
  async init(): Promise<any> {
    let finalConnectionUrl = this.smartdataOptions.mongoDbUrl;
    if (this.smartdataOptions.mongoDbPass) {
      finalConnectionUrl = mongoHelpers.addPassword(
        this.smartdataOptions.mongoDbUrl,
        this.smartdataOptions.mongoDbPass
      );
    }
    console.log(finalConnectionUrl);
    this.mongoDbClient = await plugins.mongodb.MongoClient.connect(
      finalConnectionUrl,
      {
        useNewUrlParser: true
      }
    );
    this.mongoDb = this.mongoDbClient.db(this.smartdataOptions.mongoDbName);
    this.status = 'connected';
    console.log(`Connected to database ${this.smartdataOptions.mongoDbName}`);
  }

  /**
   * closes the connection to the databse
   */
  async close(): Promise<any> {
    await this.mongoDbClient.close();
    this.status = 'disconnected';
    plugins.smartlog.defaultLogger.log(
      'info',
      `disconnected from database ${this.smartdataOptions.mongoDbName}`
    );
  }

  // handle table to class distribution

  addTable(SmartdataCollectionArg: SmartdataCollection<any>) {
    this.smartdataCollectionMap.add(SmartdataCollectionArg);
  }

  /**
   * Gets a collection's name and returns a SmartdataCollection instance
   * @param nameArg
   * @returns DbTable
   */
  async getSmartdataCollectionByName<T>(nameArg: string): Promise<SmartdataCollection<T>> {
    let resultCollection = this.smartdataCollectionMap.find(dbTableArg => {
      return dbTableArg.collectionName === nameArg;
    });
    return resultCollection;
  }
}