rxjs-trading-signals/dist/utils/FetchSum.js

The user - defined operator helps users quickly output index values. base trading-signals library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.FetchProfit = exports.fetchSum = void 0;
const big_js_1 = __importDefault(require("big.js"));
const rxjs_1 = require("rxjs");
const fetchSum = () => {
    return (0, rxjs_1.pipe)((0, rxjs_1.scan)((curr, next) => curr.plus(next), new big_js_1.default(0)), (0, rxjs_1.map)(x => x.round(8).toNumber()), (0, rxjs_1.toArray)());
};
exports.fetchSum = fetchSum;
const FetchProfit = (direction) => {
    return (observable) => new rxjs_1.Observable((subscriber) => {
        let prev = new big_js_1.default(0);
        const subscription = observable.subscribe({
            next(x) {
                if (x.offset === 'open') {
                    prev = new big_js_1.default(x.price);
                }
                else if (x.offset === 'close' && !prev.eq(0)) {
                    const profit = direction === 'buy' ? new big_js_1.default(x.price).minus(prev) : prev.minus(x.price);
                    subscriber.next(profit);
                }
            },
            error(err) {
                subscriber.error(err);
            },
            complete() {
                subscriber.complete();
            },
        });
        return () => {
            subscription.unsubscribe();
            prev = null;
        };
    });
};
exports.FetchProfit = FetchProfit;
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