456 lines
18 KiB
JavaScript
456 lines
18 KiB
JavaScript
exports.newContext = function newContext(BOT, DEBUG_MODULE, FILE_STORAGE) {
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/*
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This module allows trading bots to connect to the exchange and do trding operations on it. So far it can only work with Poloniex.
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It deals with these 3 different files that helps the bot process remember where it is standing:
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1. The Status Report.
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2. The Execution History.
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3. The Execution Context.
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*/
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const MODULE_NAME = "Context";
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/*
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Here we will keep the last status report, to be available during the whole process. The Status Report is a file the bot process
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reads and saves again after each execution. Its main purpose is to know when the last execution was in order to locate the execution
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context. When the bot runs for the first time it takes some vital parameters from there and it checks them through its lifecycle to see
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if they changed. The Status Report file can eventually be manipulated by the bot operators / developers in order to change those parameters
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or to point the last execution to a different date. Humans are not supose to manipulate the Execution Histroy or the execution Context files.
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The Execution History is basically an index with dates of all the executions the bot did across its history. It allows the bot plotter
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to know which datetimes have informacion about the bots execution in order to display it.
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The Execution Context file records all the context information of the bot at the moment of execution and the final state of all of its
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positions on the market.
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*/
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thisObject = {
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statusReport: undefined, // Here is the information that defines which was the last sucessfull execution and some other details.
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executionHistory: [], // This is the record of bot execution.
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executionContext: undefined, // Here is the business information of the last execution of this bot process.
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newHistoryRecord : {
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date: processDatetime,
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rate: 0, // This will be used to know where to plot this information in the time line.
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newPositions: 0,
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newTrades: 0,
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movedPositions: 0
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},
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initialize: initialize,
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saveThemAll: saveThemAll
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};
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/*
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During the process we will create a new History Record. This will go to the Context History file which essentially mantains an
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index of all the bots executions. This file will later be plotted by the bot s plotter on the timeline, allowing end users to
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know where there is information related to the actions taken by the bot.
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*/
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let bot = BOT;
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const logger = DEBUG_MODULE.newDebugLog();
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logger.fileName = MODULE_NAME;
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/* Storage account to be used here. */
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let cloudStorage = FILE_STORAGE.newAzureFileStorage(bot);
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let processDatetime;
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const EXCHANGE_NAME = "Poloniex";
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return thisObject;
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function initialize(pProcessDatetime, callBackFunction) {
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try {
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/*
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Here we get the positions the bot did and that are recorded at the bot storage account. We will use them through out the rest
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of the process.
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*/
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cloudStorage.initialize(bot.name);
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thisObject.newHistoryRecord.date = pProcessDatetime;
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processDatetime = pProcessDatetime;
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getStatusReport(onDone);
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function onDone(err) {
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try {
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switch (err) {
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case null: {
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callBackFunction(null);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] initialize -> onDone -> Retry Later. Requesting Execution Retry.");
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callBackFunction(err);
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return;
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}
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break;
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case 'Retry Later': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] initialize -> onDone -> Operation Failed. Aborting the process.");
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callBackFunction(err);
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> onDone -> err = " + err);
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callBackFunction("Operation Failed");
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}
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}
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function getStatusReport(callBack) {
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try {
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/* If the process run and was interrupted, there should be a status report that allows us to resume execution. */
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let fileName = "Status.Report.json"
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Processes/" + bot.process;
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cloudStorage.getTextFile(filePath, fileName, onFileReceived, true);
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function onFileReceived(text) {
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try {
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thisObject.statusReport = JSON.parse(text);
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if (thisObject.statusReport.lastExecution === undefined) {
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createConext(callBack);
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} else {
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getExecutionHistory(callBack);
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}
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} catch (err) {
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/*
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It might happen that the file content is corrupt or it does not exist. The bot can not run without an Execution Context,
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since it is risky to ignore its own context, so even for first time execution, a file with the right format
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is needed.
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*/
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logger.write("[ERROR] initialize -> getStatusReport -> Bot cannot execute without the Status report. -> Err = " + err.message);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> getExecutionHistory -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function getExecutionHistory(callBack) {
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try {
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let fileName = "Execution.History.json"
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Output/" + bot.process;
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cloudStorage.getTextFile(filePath, fileName, onFileReceived, true);
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function onFileReceived(text) {
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try {
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thisObject.executionHistory = JSON.parse(text);
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getExecutionContext(callBack);
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} catch (err) {
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/*
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It might happen that the file content is corrupt or it does not exist. The bot can not run without an Execution Hitory,
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since it is risky to ignore its own history, so even for first time execution, a file with the right format
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is needed.
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*/
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logger.write("[ERROR] initialize -> getExecutionHistory -> Bot cannot execute without the Execution History. -> Err = " + err.message);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> getExecutionHistory -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function getExecutionContext(callBack) {
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try {
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let date = new Date(thisObject.statusReport.lastExecution);
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let fileName = "Execution.Context.json"
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let dateForPath = date.getUTCFullYear() + '/' + utilities.pad(date.getUTCMonth() + 1, 2) + '/' + utilities.pad(date.getUTCDate(), 2) + '/' + utilities.pad(date.getUTCHours(), 2) + '/' + utilities.pad(date.getUTCMinutes(), 2);
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Output/" + bot.process + "/" + dateForPath;
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cloudStorage.getTextFile(filePath, fileName, onFileReceived, true);
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function onFileReceived(text) {
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try {
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thisObject.executionContext = JSON.parse(text);
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thisObject.executionContext.transactions = []; // We record here the transactions that happened duting this execution.
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callBack(null);
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} catch (err) {
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/*
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It might happen that the file content is corrupt or it does not exist. The bot can not run without a Status Report,
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since it is risky to ignore its own history, so even for first time execution, a status report with the right format
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is needed.
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*/
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logger.write("[ERROR] initialize -> getExecutionContext -> Bot cannot execute without the Execution Context. -> Err = " + err.message);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> getExecutionContext -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function createConext(callBack) {
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try {
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/*
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When the bot is executed for the very first time, there are a few files that do not exist and need to be created, and that
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is what we are going to do now.
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*/
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thisObject.executionHistory = [];
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thisObject.executionContext = {
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investment: {
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assetA: 0,
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assetB: 0
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},
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availableBalance: {
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assetA: 0,
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assetB: 0
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},
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positions: [],
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transactions: []
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};
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callBack(null);
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} catch (err) {
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logger.write("[ERROR] initialize -> createConext -> err = " + err);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> err = " + err);
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callBackFunction("Operation Failed");
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}
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}
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function saveThemAll(callBackFunction) {
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try {
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writeExecutionContext(onDone);
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function onDone(err) {
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try {
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switch (err) {
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case null: {
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callBackFunction(null);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] saveThemAll -> onDone -> Retry Later. Requesting Execution Retry.");
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callBackFunction(err);
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return;
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}
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break;
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case 'Retry Later': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] saveThemAll -> onDone -> Operation Failed. Aborting the process.");
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callBackFunction(err);
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] saveThemAll -> onDone -> err = " + err);
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callBackFunction("Operation Failed");
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}
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}
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function writeExecutionContext(callBack) {
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if (LOG_INFO === true) {
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logger.write("[INFO] saveThemAll -> writeExecutionContext -> Entering function.");
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}
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try {
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let fileName = "Execution.Context.json"
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let dateForPath = processDatetime.getUTCFullYear() + '/' + utilities.pad(processDatetime.getUTCMonth() + 1, 2) + '/' + utilities.pad(processDatetime.getUTCDate(), 2) + '/' + utilities.pad(processDatetime.getUTCHours(), 2) + '/' + utilities.pad(processDatetime.getUTCMinutes(), 2);
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Output/" + bot.process + "/" + dateForPath;
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utilities.createFolderIfNeeded(filePath, cloudStorage, onFolderCreated);
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function onFolderCreated() {
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try {
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let fileContent = JSON.stringify(thisObject.executionContext);
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cloudStorage.createTextFile(filePath, fileName, fileContent + '\n', onFileCreated);
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function onFileCreated() {
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if (LOG_INFO === true) {
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logger.write("[INFO] saveThemAll -> writeExecutionContext -> onFolderCreated -> Content written = " + fileContent);
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}
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writeExucutionHistory(callBack);
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeExecutionContext -> onFolderCreated -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeExecutionContext -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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function writeExucutionHistory(callBack) {
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if (LOG_INFO === true) {
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logger.write("[INFO] saveThemAll -> writeExucutionHistory -> Entering function.");
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}
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try {
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let fileName = "Execution.History.json"
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Output/" + bot.process;
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utilities.createFolderIfNeeded(filePath, cloudStorage, onFolderCreated);
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function onFolderCreated() {
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try {
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let newRecord = [
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newHistoryRecord.date.valueOf(),
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newHistoryRecord.rate,
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newHistoryRecord.newPositions,
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newHistoryRecord.newTrades,
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newHistoryRecord.movedPositions
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];
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thisObject.executionHistory.push(newRecord);
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let fileContent = JSON.stringify(thisObject.executionHistory);
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cloudStorage.createTextFile(filePath, fileName, fileContent + '\n', onFileCreated);
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function onFileCreated() {
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writeStatusReport(callBack);
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeExucutionHistory -> onFolderCreated -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeExucutionHistory -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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function writeStatusReport(callBack) {
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if (LOG_INFO === true) {
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logger.write("[INFO] saveThemAll -> writeStatusReport -> Entering function.");
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}
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try {
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let fileName = "Status.Report.json"
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let filePath = EXCHANGE_NAME + "/" + bot.name + "/" + bot.dataSetVersion + "/Processes/" + bot.process;
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utilities.createFolderIfNeeded(filePath, cloudStorage, onFolderCreated);
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function onFolderCreated() {
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try {
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thisObject.statusReport.lastExecution = processDatetime;
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let fileContent = JSON.stringify(thisObject.statusReport);
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cloudStorage.createTextFile(filePath, fileName, fileContent + '\n', onFileCreated);
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function onFileCreated() {
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if (LOG_INFO === true) {
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logger.write("[INFO] saveThemAll -> writeStatusReport -> onFolderCreated -> Content written = " + fileContent);
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}
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callBack(null);
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return;
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeStatusReport -> onFolderCreated -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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}
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catch (err) {
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logger.write("[ERROR] saveThemAll -> writeStatusReport -> err = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] saveThemAll -> Error = " + err.message);
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callBackFunction("Operation Failed");
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}
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}
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}; |