smartdata/ts/smartdata.classes.db.ts

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import * as plugins from './smartdata.plugins';
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import { ObjectMap } from '@pushrocks/lik';
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import { SmartdataCollection } from './smartdata.classes.collection';
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import { logger } from './smartdata.logging';
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import { IMongoDescriptor } from './interfaces';
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/**
* interface - indicates the connection status of the db
*/
export type TConnectionStatus = 'initial' | 'disconnected' | 'connected' | 'failed';
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export class SmartdataDb {
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smartdataOptions: IMongoDescriptor;
mongoDbClient: plugins.mongodb.MongoClient;
mongoDb: plugins.mongodb.Db;
status: TConnectionStatus;
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smartdataCollectionMap = new ObjectMap<SmartdataCollection<any>>();
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constructor(smartdataOptions: IMongoDescriptor) {
this.smartdataOptions = smartdataOptions;
this.status = 'initial';
}
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// basic connection stuff ----------------------------------------------
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/**
* connects to the database that was specified during instance creation
*/
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public async init(): Promise<any> {
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const finalConnectionUrl = this.smartdataOptions.mongoDbUrl
.replace('<USERNAME>', this.smartdataOptions.mongoDbUser)
.replace('<username>', this.smartdataOptions.mongoDbUser)
.replace('<PASSWORD>', this.smartdataOptions.mongoDbPass)
.replace('<password>', this.smartdataOptions.mongoDbPass)
.replace('<DBNAME>', this.smartdataOptions.mongoDbName)
.replace('<dbname>', this.smartdataOptions.mongoDbName);
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this.mongoDbClient = await plugins.mongodb.MongoClient.connect(finalConnectionUrl, {
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useNewUrlParser: true,
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useUnifiedTopology: true,
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});
this.mongoDb = this.mongoDbClient.db(this.smartdataOptions.mongoDbName);
this.status = 'connected';
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console.log(`Connected to database ${this.smartdataOptions.mongoDbName}`);
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}
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/**
* closes the connection to the databse
*/
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public async close(): Promise<any> {
await this.mongoDbClient.close();
this.status = 'disconnected';
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logger.log('info', `disconnected from database ${this.smartdataOptions.mongoDbName}`);
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}
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// handle table to class distribution
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public addTable(SmartdataCollectionArg: SmartdataCollection<any>) {
this.smartdataCollectionMap.add(SmartdataCollectionArg);
}
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/**
* Gets a collection's name and returns a SmartdataCollection instance
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* @param nameArg
* @returns DbTable
*/
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public async getSmartdataCollectionByName<T>(nameArg: string): Promise<SmartdataCollection<T>> {
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const resultCollection = this.smartdataCollectionMap.find((dbTableArg) => {
return dbTableArg.collectionName === nameArg;
});
return resultCollection;
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}
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}