historical ohlc support, edit tvWidget to enable.
This commit is contained in:
7400
@@ -1,5 +1,6 @@
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import {useChartOrderStore} from "@/orderbuild.js";
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import {invokeCallbacks, prototype} from "@/common.js";
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import datafeed from "./datafeed.js";
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export let widget = null
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export let chart = null
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@@ -29,9 +30,11 @@ export function initWidget(el) {
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// debug: true,
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autosize: true,
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symbol: 'AAPL',
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// symbol: 'Bitfinex:BTC/USD', // use this for ohlc
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interval: '1D',
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container: el,
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datafeed: new Datafeeds.UDFCompatibleDatafeed("https://demo-feed-data.tradingview.com"),
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// datafeed: datafeed, // use this for ohlc
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locale: "en",
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disabled_features: [],
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enabled_features: [],
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166
src/charts/datafeed.js
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166
src/charts/datafeed.js
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@@ -0,0 +1,166 @@
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// import {
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// makeApiRequest,
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// generateSymbol,
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// parseFullSymbol,
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// } from './helpers.js';
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// import {
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// subscribeOnStream,
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// unsubscribeFromStream,
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// } from './streaming.js';
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import {jBars} from './jBars.js';
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const lastBarsCache = new Map();
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// DatafeedConfiguration implementation
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const configurationData = {
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// Represents the resolutions for bars supported by your datafeed
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// supported_resolutions: ['1D', '1W', '1M'],
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supported_resolutions: ['1D'],
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// The `exchanges` arguments are used for the `searchSymbols` method if a user selects the exchange
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exchanges: [{
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value: 'Bitfinex',
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name: 'Bitfinex',
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desc: 'Bitfinex',
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},
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],
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// The `symbols_types` arguments are used for the `searchSymbols` method if a user selects this symbol type
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symbols_types: [{
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name: 'crypto',
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value: 'crypto',
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},
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],
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};
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// Obtains all symbols for all exchanges supported by CryptoCompare API
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async function getAllSymbols() {
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// const data = await makeApiRequest('data/v3/all/exchanges');
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// let allSymbols = [];
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return [{
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symbol: 'BTC/USD',
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full_name: 'Bitfinex:BTC/USD',
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description: 'BTC/USD',
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exchange: 'Bitfinex',
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type: 'crypto'}
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];
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}
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export default {
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onReady: (callback) => {
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console.log('[onReady]: Method call');
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setTimeout(() => callback(configurationData));
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},
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searchSymbols: async (
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userInput,
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exchange,
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symbolType,
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onResultReadyCallback,
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) => {
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console.log('[searchSymbols]: Method call');
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const symbols = await getAllSymbols();
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const newSymbols = symbols.filter(symbol => {
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const isExchangeValid = exchange === '' || symbol.exchange === exchange;
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const isFullSymbolContainsInput = symbol.full_name
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.toLowerCase()
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.indexOf(userInput.toLowerCase()) !== -1;
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return isExchangeValid && isFullSymbolContainsInput;
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});
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onResultReadyCallback(newSymbols);
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},
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resolveSymbol: async (
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symbolName,
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onSymbolResolvedCallback,
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onResolveErrorCallback,
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extension
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) => {
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console.log('[resolveSymbol]: Method call', symbolName);
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const symbols = await getAllSymbols();
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const symbolItem = symbols.find(({
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full_name,
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}) => full_name === symbolName);
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if (!symbolItem) {
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console.log('[resolveSymbol]: Cannot resolve symbol', symbolName);
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onResolveErrorCallback('cannot resolve symbol');
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return;
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}
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// Symbol information object
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const symbolInfo = {
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ticker: symbolItem.full_name,
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name: symbolItem.symbol,
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description: symbolItem.description,
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type: symbolItem.type,
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session: '24x7',
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timezone: 'Etc/UTC',
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exchange: symbolItem.exchange,
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minmov: 1,
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pricescale: 100,
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has_intraday: false,
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has_no_volume: true,
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has_weekly_and_monthly: false,
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supported_resolutions: configurationData.supported_resolutions,
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volume_precision: 2,
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data_status: 'streaming',
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};
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console.log('[resolveSymbol]: Symbol resolved', symbolName);
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onSymbolResolvedCallback(symbolInfo);
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},
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getBars: async (symbolInfo, resolution, periodParams, onHistoryCallback, onErrorCallback) => {
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const { from, to, firstDataRequest } = periodParams;
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console.log('[getBars]: Method call', symbolInfo, resolution, from, to);
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// const parsedSymbol = parseFullSymbol(symbolInfo.full_name);
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// const urlParameters = {
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// e: parsedSymbol.exchange,
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// fsym: parsedSymbol.fromSymbol,
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// tsym: parsedSymbol.toSymbol,
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// toTs: to,
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// limit: 2000,
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// };
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try {
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var bars = await jBars(from, to, resolution);
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if (firstDataRequest) {
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lastBarsCache.set(symbolInfo.full_name, {
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...bars[bars.length - 1],
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});
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}
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console.log(`[getBars]: returned ${bars.length} bar(s)`);
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onHistoryCallback(bars, {
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noData: false,
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});
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} catch (error) {
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console.log('[getBars]: Get error', error);
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onErrorCallback(error);
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}
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},
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subscribeBars: (
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symbolInfo,
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resolution,
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onRealtimeCallback,
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subscriberUID,
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onResetCacheNeededCallback,
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) => {
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console.log('[subscribeBars]: Method call with subscriberUID:', subscriberUID);
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// throw Error('subscribeBars unimplemented');
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// subscribeOnStream(
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// symbolInfo,
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// resolution,
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// onRealtimeCallback,
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// subscriberUID,
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// onResetCacheNeededCallback,
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// lastBarsCache.get(symbolInfo.full_name),
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// );
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},
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unsubscribeBars: (subscriberUID) => {
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console.log('[unsubscribeBars]: Method call with subscriberUID:', subscriberUID);
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// throw Error('unsubscribeBars unimplemented');
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// unsubscribeFromStream(subscriberUID);
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},
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};
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107
src/charts/jBars.js
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107
src/charts/jBars.js
Normal file
@@ -0,0 +1,107 @@
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export async function jBars (from, to, res) {
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console.log('[jBars]: Method call', res, from, to);
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var fromDate = new Date(from*1000);
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var toDate = new Date(to*1000);
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console.log("fromDate:", fromDate.toUTCString());
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console.log("toDate: ", toDate.toUTCString());
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const contract = "0xC31E54c7a869B9FcBEcc14363CF510d1c41fa443";
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// check parameters
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if (res != "1D") throw Error("Only 1D resolution currently supported");
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console.assert(fromDate.getUTCHours() == 0, "hours should be zero");
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console.assert(fromDate.getUTCMinutes() == 0, "minutes should be zero");
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console.assert(fromDate.getUTCSeconds() == 0, "seconds should be zero");
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console.assert(fromDate.getUTCMilliseconds() == 0, "milliseconds should be zero");
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// Spoof data
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var spoof;
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{
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const yr = "2022";
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const mo = "01";
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const url = `/ohlc/42161/${contract}/${res}/${yr}/${contract}-${res}-${yr}${mo}.json`
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const response = await fetch(url);
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spoof = await response.json();
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}
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var bars = [];
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for ( // Once around for each sample in from-to range
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let iDate = fromDate,
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// loop state
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iMonth = -1,
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iolhc = 0,
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ohlc;
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iDate < toDate;
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iDate.setUTCDate(iDate.getUTCDate()+1)
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) {
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let bar = undefined;
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// Fetch one sample file as needed
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if (iMonth != iDate.getUTCMonth()) {
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const yr = iDate.getUTCFullYear();
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const mo = String(iDate.getUTCMonth()+1).padStart(2, '0');
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const url = `/ohlc/42161/${contract}/${res}/${yr}/${contract}-${res}-${yr}${mo}.json`
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let response = await fetch(url);
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if (response.ok) {
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ohlc = await response.json();
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} else {
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ohlc = []; // no file, then empty data
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}
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iMonth = iDate.getUTCMonth();
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iolhc = 0;
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}
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let ohlcDate = iolhc >= ohlc.length ? undefined : new Date(ohlc[iolhc][0]+'Z');
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// no ohlc sample, insert a visible sample
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if (ohlcDate == undefined) {
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bar = {
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time: iDate.getTime(),
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open: 50,
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high: 50,
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low: 0,
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close: 0,
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}
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}
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// ohlc sample not for this time, insert invisible sample
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else if ( iDate.getTime() != ohlcDate.getTime() ) {
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bar = {
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time: iDate.getTime(),
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// open: 100,
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// high: 100,
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// low: 0,
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// close: 0,
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}
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// Copy ohlc sample
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} else {
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bar = {
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time: iDate.getTime(),
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open: ohlc[iolhc][1],
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high: ohlc[iolhc][2],
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low: ohlc[iolhc][3],
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close: ohlc[iolhc][4],
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}
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iolhc++;
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}
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if (bar==undefined) throw "bar==undefined";
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bars.push(bar);
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}
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return bars;
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}
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