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FCoin Helper

Add total amount for FCoin exchnage finance

// ==UserScript==
// @name         FCoin Helper
// @namespace    http://exchange.fcoin.com/
// @version      0.1.3
// @description  Add total amount for FCoin exchnage finance
// @supportURL   https://github.com/yanghuan/FCoin-Helper/issues
// @author       YANG Huan
// @match        https://exchange.fcoin.com/*
// @require      https://code.jquery.com/jquery-1.12.4.min.js
// @grant        none
// @contributionURL    https://github.com/yanghuan/FCoin-Helper#crypto
// ==/UserScript==

$.noConflict();
(function() {
    'use strict';
    var $ = jQuery;
    var tokens = null;
    var curPrices = {};
    var cnyRate = null;
    function isFinancePage() {
        return document.URL.indexOf("finance") != - 1;
    }
    function isLanguageZH() {
        return $(".Dropdown-placeholder").text() == "简体中文";
    }
    function getCNYRate() {
        if (isLanguageZH()) {
            if (cnyRate == null) {
                loadCNYRate();
            }
        }
        else {
            cnyRate = null;
        }
        return cnyRate;
    }
    function loadCNYRate() {
        $.getJSON("https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20json%20where%20url%20%3D%20%22https%3A%2F%2Fwww.fcoin.com%2Fapi%2Fcommon%2Fget_rate%22&format=json&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys", function (data) {
            let rate = data.query.results.json.data;
            cnyRate = parseFloat(rate);
        });
    }
    function checkBalance() {
        let authToken = localStorage.getItem("__f_token__");
        $.ajax({
            type: "GET",
            url: "/api/web/v1/accounts/balance",
            headers:{ "token": authToken },
            success: function (result) {
                if (result.status == 0) {
                    tokens = [];
                    for (let i = 0; i < result.data.length; ++i) {
                        let it = result.data[i];
                        tokens.push({ "symbol": it.currency, "count": it.balance, "available": it.available });
                    }
                    getPricesFromWebSocket();
                }
                else {
                    console.error("get balance error:" + JSON.stringify(result));
                }
            }
        });
    }
    function getPricesFromWebSocket() {
        let webSocket = new WebSocket("wss://ws.fcoin.com/api/v2/ws");
        webSocket.binaryType = "arraybuffer";
        webSocket.onopen = function(event){
            console.log(("webSocket connect at time: "+new Date()));
            var sub_tickers = {
                "id":'tickers',
                "cmd": "sub",
                "args": ['all-tickers']
            };
            webSocket.send(JSON.stringify(sub_tickers));
        };
        webSocket.onmessage = function(event){
            let raw_data = event.data;
            let data = JSON.parse(raw_data);
            if (data.topic == 'all-tickers') {
                if (data.tickers.length > 0) {
                    for (let i = 0; i < data.tickers.length; i++) {
                        let ticker = data.tickers[i];
                        let symbol = ticker.symbol;
                        let price = ticker.ticker[0];
                        if (symbol == "ethusdt") {
                            if (price != null) {
                              curPrices.eth = price;
                            }
                        }
                        else if (symbol == "btcusdt") {
                            if (price != null) {
                              curPrices.btc = price;
                            }
                        }
                        else if (symbol == "ftusdt") {
                            if (price != null) {
                              curPrices.ft = price;
                            }
                        }
                        updatePrice(symbol, price);
                    }
                }
            }
        };
        webSocket.onclose = function() {
            console.log("webSocket connect is closed");
            console.log(arguments);
            getPricesFromWebSocket();
        };
        webSocket.onerror = function(){
            console.log("error");
            console.log(arguments);
            getPricesFromWebSocket();
        };
        setInterval(function () {
            webSocket.send(JSON.stringify({"cmd": "ping","args":[ Date.parse(new Date())]}));
        }, 40000);
    }
    function spiltSymbol(symbol) {
        let len = symbol.length;
        let last = symbol[len - 1];
        let token, price;
        if (last == "c") {
            token = symbol.substr(0, len - 3);
            price = "btc";
        }
        else if (last == "h") {
            token = symbol.substr(0, len - 3);
            price = "eth";
        }
        else if (last == "t") {
            let prevLast = symbol[len - 2];
            if (prevLast == "d") {
                token = symbol.substr(0, len - 4);
                price = "usdt";
            }
            else {
                token = symbol.substr(0, len - 2);
                price = "ft";
            }
        }
        return [token, price];
    }
    function updatePrice(symbol, price) {
        let a = spiltSymbol(symbol);
        let token = a[0];
        let priceToken = a[1];
        let info = tokens.find(i => i.symbol == token);
        if (info != null) {
            info["@" + priceToken] = price;
            update();
        }
        else {
            console.warn(`${token} is not found in finance`);
        }
    }
    function getPriceOfUSDT(t) {
        if (t.symbol == "usdt") {
            return 1;
        }
        let usdt = t["@usdt"];
        if (usdt != null) {
            return usdt;
        }
        let btc = t["@btc"];
        if (btc != null) {
            return btc * curPrices.btc;
        }
        let eth = t["@eth"];
        if (eth != null) {
            return eth * curPrices.eth;
        }
        let ft = t["@ft"];
        if (ft != null) {
            return ft * curPrices.ft;
        }
        return null;
    }
    function getTotalUSDT() {
        let total = 0;
        for (let i = 0; i < tokens.length; ++i) {
            let t = tokens[i];
            let p = getPriceOfUSDT(t);
            if (p == null) {
              return null;
            }
            let money = parseFloat(t.count) * p;
            total += money;
        }
        return total;
    }
    function show(datas) {
        let infoString = ":" + datas.join("/ ");
        let capital = $(".fzPqWC");
        let span = capital.children("span");
        let next = span.children("span");
        if (next.length > 0) {
            next.html(infoString);
        }
        else {
            span.append(`<span>${infoString}</span>`);
        }
    }
    function update() {
        let datas = []
        let usdt = getTotalUSDT();
        if (usdt != null) {
          let cnyRate = getCNYRate();
          if (cnyRate != null) {
              let cny = usdt * cnyRate;
              let cnyString = `${cny.toFixed(2)} cny`;
              datas.push(cnyString);
          }
          let usdtString = `${usdt.toFixed(2)} usdt`;
          datas.push(usdtString);
          let btcString = `${(usdt / curPrices.btc).toFixed(4)} btc`;
          datas.push(btcString);
          let ethString = `${(usdt / curPrices.eth).toFixed(4)} eth`;
          datas.push(ethString);
          let ftString = `${(usdt / curPrices.ft).toFixed(4)} ft` ;
          datas.push(ftString);
          show(datas);
        }
    }
    function check() {
        if (tokens == null && isFinancePage()) {
            getCNYRate();
            checkBalance();
        }
        else {
            setTimeout(check, 1000);
        }
    }
    $(function () {
        //debugger;
        check();
    });
})();