|
| 1 | +import { Logger } from '../logger'; |
| 2 | +import { InitDBResponse } from './db'; |
| 3 | +import { from, Observable } from 'rxjs'; |
| 4 | +import { Order, Trade } from 'ccxt'; |
| 5 | +import { OrderAttributes, OrderInstance } from './order'; |
| 6 | +import { map, mergeMap } from 'rxjs/operators'; |
| 7 | +import { TradeAttributes } from './trade'; |
| 8 | + |
| 9 | +type SaveOrderParams = { |
| 10 | + order: Order; |
| 11 | +}; |
| 12 | + |
| 13 | +class OrderRepository { |
| 14 | + constructor(private models: InitDBResponse, private logger: Logger) {} |
| 15 | + |
| 16 | + public saveOrder$ = ({ |
| 17 | + order, |
| 18 | + }: SaveOrderParams): Observable<OrderInstance> => { |
| 19 | + this.logger.trace(`Saving order ${JSON.stringify(order)} into database`); |
| 20 | + |
| 21 | + const arbyOrder = this.convertToArbyOrder(order); |
| 22 | + const arbyTrades = this.convertToArbyTrades(order.trades, order.id); |
| 23 | + // TODO async |
| 24 | + return from(this.models.Order.create(arbyOrder)).pipe( |
| 25 | + mergeMap(order => { |
| 26 | + return from(this.models.Trade.bulkCreate(arbyTrades)).pipe( |
| 27 | + map(() => { |
| 28 | + this.logger.trace( |
| 29 | + `Order with id ${order.id} has been successfully saved` |
| 30 | + ); |
| 31 | + return order; |
| 32 | + }) |
| 33 | + ); |
| 34 | + }) |
| 35 | + ); |
| 36 | + }; |
| 37 | + |
| 38 | + private convertToArbyOrder(order: Order): OrderAttributes { |
| 39 | + return { |
| 40 | + id: order.id, |
| 41 | + datetime: order.datetime, |
| 42 | + timestamp: order.timestamp, |
| 43 | + lastTradeTimestamp: order.lastTradeTimestamp, |
| 44 | + status: order.status, |
| 45 | + symbol: order.symbol, |
| 46 | + type: order.type, |
| 47 | + side: order.side, |
| 48 | + price: order.price, |
| 49 | + average: order.average, |
| 50 | + amount: order.amount, |
| 51 | + filled: order.filled, |
| 52 | + remaining: order.remaining, |
| 53 | + cost: order.cost, |
| 54 | + info: order.info, |
| 55 | + feeType: order.fee.type, |
| 56 | + feeCurrency: order.fee.currency, |
| 57 | + feeRate: order.fee.rate, |
| 58 | + feeCost: order.fee.cost, |
| 59 | + }; |
| 60 | + } |
| 61 | + |
| 62 | + private convertToArbyTrades( |
| 63 | + trades: Trade[], |
| 64 | + orderId: string |
| 65 | + ): TradeAttributes[] { |
| 66 | + const result: TradeAttributes[] = []; |
| 67 | + trades.forEach(trade => { |
| 68 | + result.push({ |
| 69 | + id: trade.id, |
| 70 | + orderId, |
| 71 | + amount: trade.amount, |
| 72 | + datetime: trade.datetime, |
| 73 | + info: trade.info, |
| 74 | + price: trade.price, |
| 75 | + timestamp: trade.timestamp, |
| 76 | + type: trade.type, |
| 77 | + side: trade.side, |
| 78 | + symbol: trade.symbol, |
| 79 | + takerOrMaker: trade.takerOrMaker, |
| 80 | + cost: trade.cost, |
| 81 | + }); |
| 82 | + }); |
| 83 | + |
| 84 | + return result; |
| 85 | + } |
| 86 | +} |
| 87 | + |
| 88 | +export { OrderRepository, SaveOrderParams }; |
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