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import { Collection } from './collection';
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import { getDbQueryWrapper, dbCollection } from '../data_layer';
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import { DbConnector } from './db_connector';
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import { DbConnectorFactory } from './db_connector/factory';
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import * as deasync from 'deasync';
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export enum SortingOrder { ASCENDING = 1, DESCENDING = -1 };
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/**
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* Class which helps to make queries to your collection
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*
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* @param { string | object } query: a key as a string or mongodb-style query
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*/
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export type DBQ = {
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findOne: (query: string | object) => Promise<any | null>,
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findMany: (query: string[] | object, sortQuery?: object) => Promise<any[]>,
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insertOne: (document: object) => Promise<string>,
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insertMany: (documents: object[]) => Promise<string[]>,
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updateOne: (query: string | object, updateQuery: any) => Promise<void>,
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updateMany: (query: string[] | object, updateQuery: any) => Promise<void>,
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removeOne: (query: string) => Promise<boolean>
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removeMany: (query: string[] | object) => Promise<number>
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}
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const queryWrapper = getDbQueryWrapper();
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let db: Map<Collection, dbCollection>;
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function dbCollectionFromCollection(collection: Collection): dbCollection {
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let dbCollection = db.get(collection);
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if(dbCollection === undefined) {
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throw new Error('Can`t find collection ' + collection);
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}
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return dbCollection;
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}
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export function makeDBQ(collection: Collection): DBQ {
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return {
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findOne: queryWrapper.dbFindOne.bind(null, dbCollectionFromCollection(collection)),
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findMany: queryWrapper.dbFindMany.bind(null, dbCollectionFromCollection(collection)),
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insertOne: queryWrapper.dbInsertOne.bind(null, dbCollectionFromCollection(collection)),
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insertMany: queryWrapper.dbInsertMany.bind(null, dbCollectionFromCollection(collection)),
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updateOne: queryWrapper.dbUpdateOne.bind(null, dbCollectionFromCollection(collection)),
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updateMany: queryWrapper.dbUpdateMany.bind(null, dbCollectionFromCollection(collection)),
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removeOne: queryWrapper.dbRemoveOne.bind(null, dbCollectionFromCollection(collection)),
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removeMany: queryWrapper.dbRemoveMany.bind(null, dbCollectionFromCollection(collection))
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}
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}
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let done = false;
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DbConnectorFactory.getDbConnector().then((connector: DbConnector) => {
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done = true;
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db = connector.db;
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}).catch((err) => {
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console.log(`data service got error while connect to data base ${err}`);
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//TODO: choose best practice for error handling
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throw err;
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});
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deasync.loopWhile(() => !done);
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