559 lines
17 KiB
JavaScript
559 lines
17 KiB
JavaScript
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function newFileCursor () {
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const MODULE_NAME = 'File Cursor'
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const INFO_LOG = false
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const ERROR_LOG = true
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const logger = newWebDebugLog()
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logger.fileName = MODULE_NAME
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let cursorDate
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let thisObject = {
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eventHandler: undefined, // received from parent
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reload: reload,
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setDatetime: setDatetime,
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setTimeFrame: setTimeFrame,
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files: new Map(),
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getExpectedFiles: getExpectedFiles,
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initialize: initialize,
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finalize: finalize
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}
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let minCursorSize = 10
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let maxCursorSize = 30
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let market
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let exchange
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let fileCloud
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let dataMine
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let bot
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let session
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let product
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let dataset
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let periodName
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let timeFrame
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let beginDateRange
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let endDateRange
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let finalized = false
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let eventSubscriptionIdDatasetUpdated
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let eventSubscriptionIdDataRangeUpdated
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return thisObject
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function finalize () {
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try {
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systemEventHandler.stopListening('Dataset Updated', eventSubscriptionIdDatasetUpdated)
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systemEventHandler.stopListening('Data Range Updated', eventSubscriptionIdDataRangeUpdated)
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thisObject.eventHandler = undefined
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market = undefined
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exchange = undefined
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fileCloud = undefined
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dataMine = undefined
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bot = undefined
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session = undefined
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product = undefined
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dataset = undefined
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periodName = undefined
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timeFrame = undefined
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beginDateRange = undefined
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endDateRange = undefined
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thisObject.files = undefined
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cursorDate = undefined
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fileCloud = undefined
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periodName = undefined
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timeFrame = undefined
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finalized = true
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] finalize -> err = ' + err.stack) }
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}
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}
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function initialize (pFileCloud, pDataMine, pBot, pSession, pProduct, pDataset, pExchange, pMarket, pPeriodName, pTimeFrame, pCursorDate, pCurrentTimeFrame, pBeginDateRange, pEndDateRange, callBackFunction) {
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try {
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market = pMarket
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exchange = pExchange
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fileCloud = pFileCloud
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dataMine = pDataMine
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bot = pBot
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session = pSession
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product = pProduct
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dataset = pDataset
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periodName = pPeriodName
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cursorDate = removeTime(pCursorDate)
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timeFrame = pTimeFrame
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beginDateRange = pBeginDateRange
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endDateRange = pEndDateRange
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let key = dataMine.code.codeName + '-' + bot.code.codeName + '-' + product.code.codeName + '-' + dataset.code.codeName
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systemEventHandler.listenToEvent(key, 'Dataset Updated', undefined, key + '-' + periodName, onResponseDataSet, updateFiles)
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key = dataMine.code.codeName + '-' + bot.code.codeName + '-' + product.code.codeName + '-' + pPeriodName
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systemEventHandler.listenToEvent(key, 'Data Range Updated', undefined, key, onResponseDataRange, updateDataRange)
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callBackFunction(GLOBAL.DEFAULT_OK_RESPONSE)
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function onResponseDataSet (message) {
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eventSubscriptionIdDatasetUpdated = message.eventSubscriptionId
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}
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function onResponseDataRange (message) {
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eventSubscriptionIdDataRangeUpdated = message.eventSubscriptionId
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] initialize -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function updateDataRange (message) {
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try {
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if (finalized === true) { return }
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if (message.event === undefined || message.event.dateRange === undefined) { return }
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beginDateRange = new Date(message.event.dateRange.begin)
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endDateRange = new Date(message.event.dateRange.end)
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let minDate = beginDateRange.valueOf()
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let maxDate = endDateRange.valueOf() + ONE_DAY_IN_MILISECONDS
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for (let key of thisObject.files.keys()) {
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let keyDate = new Date(key)
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if (keyDate.valueOf() < minDate || keyDate.valueOf() > maxDate) {
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thisObject.files.delete(key)
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thisObject.eventHandler.raiseEvent('Files Updated')
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] updateDataRange -> err = ' + err.stack) }
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}
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}
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function updateFiles (message) {
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try {
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if (finalized === true) { return }
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if (message.event === undefined || message.event.lastFile === undefined) { return }
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let targetDate = new Date(message.event.lastFile)
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let dateString
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let file
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dateString = targetDate.getUTCFullYear() + '-' + pad(targetDate.getUTCMonth() + 1, 2) + '-' + pad(targetDate.getUTCDate(), 2)
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fileCloud.getFile(dataMine, bot, session, dataset, exchange, market, periodName, targetDate, undefined, undefined, onFileReceived)
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function onFileReceived (err, file) {
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try {
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if (finalized === true) { return }
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if (err.result === GLOBAL.DEFAULT_OK_RESPONSE.result) {
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thisObject.files.set(dateString, file)
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thisObject.eventHandler.raiseEvent('Files Updated')
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] updateFiles -> onFileReceived -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] updateFiles -> err = ' + err.stack) }
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}
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}
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function setTimeFrame (pTimeFrame, pDatetime) {
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try {
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if (finalized === true) { return }
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/*
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We are implementing here an algorithm designed to save bandwidth, memory and processing power at the browser.
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We say there is a saving mode where the cursor is running at a minimum size. When the end user aproaches the time period the cursor
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is set, then it should exit the saving mode and go to its actual size.
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To do this we are going to measure the distance from the Time Frame received to the one the cursors was initialized with.
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If these periods are consecutive, it means that the cursor should exit saving mode and load its full size.
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*/
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cursorDate = removeTime(pDatetime) // Adjust the cursor date to the one received.
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let positionA
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for (let i = 0; i < dailyFilePeriods.length; i++) {
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let period = dailyFilePeriods[i]
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if (period[0] === pTimeFrame) {
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positionA = i
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}
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if (period[0] === timeFrame) {
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positionB = i
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}
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}
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if (Math.abs(positionB - positionA) <= 1) {
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exitSavingMode()
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} else {
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enterSavingMode()
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}
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function enterSavingMode () {
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try {
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switch (timeFrame) {
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case _45_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 30
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}
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break
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case _40_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 20
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}
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break
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case _30_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _20_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _15_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _10_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _5_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _4_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _3_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _2_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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case _1_MINUTE_IN_MILISECONDS:
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{
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minCursorSize = 3
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maxCursorSize = 15
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}
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break
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default:
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] setTimeFrame -> enterSavingMode -> err = ' + err.stack) }
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}
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}
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function exitSavingMode () {
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try {
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switch (timeFrame) {
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case _45_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 15
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maxCursorSize = 30
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}
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break
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case _40_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 13
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maxCursorSize = 20
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}
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break
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case _30_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 11
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maxCursorSize = 15
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}
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break
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case _20_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 9
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maxCursorSize = 15
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}
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break
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case _15_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 7
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maxCursorSize = 15
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}
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break
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case _10_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 7
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maxCursorSize = 15
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}
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break
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case _5_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 5
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maxCursorSize = 15
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}
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break
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case _4_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 5
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maxCursorSize = 15
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}
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break
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case _3_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 5
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maxCursorSize = 15
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}
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break
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case _2_MINUTES_IN_MILISECONDS:
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{
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minCursorSize = 5
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maxCursorSize = 15
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}
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break
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case _1_MINUTE_IN_MILISECONDS:
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{
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minCursorSize = 5
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maxCursorSize = 15
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}
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break
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default:
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] setTimeFrame -> exitSavingMode -> err = ' + err.stack) }
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] setTimeFrame -> err = ' + err.stack) }
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}
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}
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function setDatetime (pDatetime) {
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try {
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if (finalized === true) { return }
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if (pDatetime === undefined) {
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if (ERROR_LOG === true) { logger.write('[ERROR] setDatetime -> Received undefined datetime.') }
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return
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}
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cursorDate = removeTime(pDatetime)
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] setDatetime -> err = ' + err.stack) }
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}
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}
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function reload (callBackFunction) {
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try {
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if (finalized === true) { return }
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getFiles(callBackFunction)
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collectGarbage(callBackFunction)
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] reload -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function getFiles (callBackFunction) {
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try {
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if (finalized === true) { return }
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let i = 0
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let j = 0
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let dateString
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getNextFile()
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function getNextFile () {
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try {
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let targetDate = new Date(cursorDate)
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targetDate.setUTCDate(targetDate.getUTCDate() + j)
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/* Small algorith to allow load first the current date, then alternate between the most forwad and the most backwards ones. */
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if (j === 0) { j++ } else {
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if (j < 0) {
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j = -j
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j++
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} else {
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j = -j
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}
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}
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let compareTargetDate = new Date(targetDate.valueOf())
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if (beginDateRange !== undefined) {
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let compareBeginDate = removeTime(beginDateRange)
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if (compareTargetDate.valueOf() < compareBeginDate) {
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controlLoop()
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return
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}
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}
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if (endDateRange !== undefined) {
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let compareEndDate = removeTime(endDateRange)
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if (compareTargetDate.valueOf() > compareEndDate) {
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controlLoop()
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return
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}
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}
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dateString = targetDate.getUTCFullYear() + '-' + pad(targetDate.getUTCMonth() + 1, 2) + '-' + pad(targetDate.getUTCDate(), 2)
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let currentDay = Math.trunc((new Date()).valueOf() / (24 * 60 * 60 * 1000))
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let targetDay = Math.trunc(targetDate.valueOf() / (24 * 60 * 60 * 1000))
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if (targetDay > currentDay) {
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controlLoop()
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} else {
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if (thisObject.files.get(dateString) === undefined) {
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// We dont reload files we already have.
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fileCloud.getFile(dataMine, bot, session, dataset, exchange, market, periodName, targetDate, undefined, undefined, onFileReceived)
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} else {
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controlLoop()
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] getFiles -> getNextFile -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function onFileReceived (err, file) {
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try {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> Entering function.') }
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switch (err.result) {
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case GLOBAL.DEFAULT_OK_RESPONSE.result: {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> Received OK Response.') }
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break
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}
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case GLOBAL.DEFAULT_FAIL_RESPONSE.result: {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> Received FAIL Response.') }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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return
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}
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case GLOBAL.CUSTOM_FAIL_RESPONSE.result: {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> Received CUSTOM FAIL Response.') }
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> err.message = ' + err.message) }
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if (err.message === 'File does not exist.') {
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controlLoop()
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return
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} else {
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callBackFunction(err)
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return
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}
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}
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default: {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> onFileReceived -> Received Unexpected Response.') }
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callBackFunction(err)
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return
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}
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}
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thisObject.files.set(dateString, file)
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controlLoop()
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] getFiles -> onFileReceived -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function controlLoop () {
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try {
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if (INFO_LOG === true) { logger.write('[INFO] getFiles -> controlLoop -> Entering function.') }
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if (callBackFunction !== undefined) {
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callBackFunction(GLOBAL.DEFAULT_OK_RESPONSE)
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}
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i++
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if (i < minCursorSize) {
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getNextFile()
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] getFiles -> controlLoop -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] getFiles -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function collectGarbage (callBackFunction) {
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try {
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if (finalized === true) { return }
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date = removeTime(cursorDate)
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let minDate = date.valueOf() - maxCursorSize * ONE_DAY_IN_MILISECONDS / 2
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let maxDate = date.valueOf() + maxCursorSize * ONE_DAY_IN_MILISECONDS / 2
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for (let key of thisObject.files.keys()) {
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let keyDate = new Date(key)
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if (keyDate.valueOf() < minDate || keyDate.valueOf() > maxDate) {
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thisObject.files.delete(key)
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}
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}
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} catch (err) {
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if (ERROR_LOG === true) { logger.write('[ERROR] collectGarbage -> err = ' + err.stack) }
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callBackFunction(GLOBAL.DEFAULT_FAIL_RESPONSE)
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}
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}
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function getExpectedFiles () {
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if (finalized === true) { return }
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if (INFO_LOG === true) { logger.write('[INFO] getExpectedFiles -> Entering function.') }
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return minCursorSize
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}
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}
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