tradingview-scraper
Version:
A gateway to TradingView's data for your Node.js application!
164 lines • 8.63 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.TradingViewAPI = void 0;
var TickerSubscription_1 = require("./TickerSubscription");
var TradingViewWebSocket_1 = require("./TradingViewWebSocket");
var TradingViewAPI = /** @class */ (function () {
function TradingViewAPI() {
this.subscriptionMap = new Map();
this.ws = new TradingViewWebSocket_1.TradingViewWebSocket();
}
TradingViewAPI.prototype.setup = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
this.ws.on('data', function (simpleOrProName, status, data) {
if (status !== 'ok') {
return;
}
var subs = _this.subscriptionMap.get(simpleOrProName);
if (!subs) {
return;
}
subs.forEach(function (s) {
if (s.canBeDestroyed) {
subs.delete(s);
s.destroyed = true;
if (subs.size === 0) {
_this.ws.unregisterSymbol(s.simpleOrProName);
_this.subscriptionMap.delete(s.simpleOrProName);
}
return;
}
s.updateData(data);
});
});
return [4 /*yield*/, this.ws.connect()];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
TradingViewAPI.prototype.cleanup = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
this.ws.disconnect();
return [2 /*return*/];
});
});
};
TradingViewAPI.prototype.getTicker = function (simpleOrProName) {
return __awaiter(this, void 0, void 0, function () {
var tickers, ticker;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
tickers = this.subscriptionMap.get(simpleOrProName);
if (tickers) {
return [2 /*return*/, tickers.entries().next().value];
}
ticker = new TickerSubscription_1.TickerSubscription(this, simpleOrProName);
return [4 /*yield*/, ticker.fetch()];
case 1:
_a.sent();
return [2 /*return*/, ticker];
}
});
});
};
TradingViewAPI.prototype.ensureRegistered = function (ticker) {
return __awaiter(this, void 0, void 0, function () {
var tickers;
var _this = this;
return __generator(this, function (_a) {
tickers = this.subscriptionMap.get(ticker.simpleOrProName);
if (tickers && tickers.has(ticker)) {
return [2 /*return*/];
}
// eslint-disable-next-line no-async-promise-executor
return [2 /*return*/, new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () {
var updated, onUpdate;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
updated = false;
onUpdate = function (data) {
if (!data.pro_name) {
return;
}
updated = true;
ticker.removeListener('update', onUpdate);
resolve();
};
ticker.on('update', onUpdate);
if (!!tickers) return [3 /*break*/, 2];
return [4 /*yield*/, this.ws.registerSymbol(ticker.simpleOrProName)];
case 1:
_a.sent();
this.subscriptionMap.set(ticker.simpleOrProName, new Set([ticker]));
return [3 /*break*/, 4];
case 2:
if (!!tickers.has(ticker)) return [3 /*break*/, 4];
return [4 /*yield*/, this.ws.registerSymbol(ticker.simpleOrProName)];
case 3:
_a.sent();
this.subscriptionMap.set(ticker.simpleOrProName, tickers.add(ticker));
_a.label = 4;
case 4:
setTimeout(function () {
if (!updated) {
ticker.removeListener('update', onUpdate);
reject('Timed out.');
}
}, 3000);
return [2 /*return*/];
}
});
}); })];
});
});
};
return TradingViewAPI;
}());
exports.TradingViewAPI = TradingViewAPI;
//# sourceMappingURL=TradingViewAPI.js.map