Superalgos/TimeMachine.js

 /*

Markets are a function of time. When watching them, end users must be positioned at one particular point in time. The system currently allows users
to position themselves at any time they like.

In the future, it will be usefull to explore markets and compare them at different times simultaneously. Anticipating that future this module exists.
All the charts that depand on a datetime are children of this object Time Machine. In the future we will allow users to have more than one Time Machine,
each one with it own charts, and each one positioned at an especific point in titme.

*/

function newTimeMachine () {
  const MODULE_NAME = 'Time Machine'
  const INFO_LOG = false
  const logger = newWebDebugLog()
  logger.fileName = MODULE_NAME

  let thisObject = {
    container: undefined,
    draw: draw,
    charts: [],
    getContainer: getContainer,     // returns the inner most container that holds the point received by parameter.
    initialize: initialize,
    finalize: finalize
  }

  let container = newContainer()
  container.initialize()
  thisObject.container = container
  thisObject.container.isDraggeable = false

  container.displacement.containerName = 'Time Machine'
  container.frame.containerName = 'Time Machine'

  let controlPanelHandle             // We need this to destroy the Panel when this object is itself destroyed or no longer needs it...
          // ... also to request a reference to the object for the cases we need it.

  return thisObject

  function finalize () {
    try {
      if (INFO_LOG === true) { logger.write('[INFO] finalize -> Entering function.') }

      for (let i = 0; i < thisObject.charts.length; i++) {
        let chart = thisObject.charts[i]
        chart.finalize()
      }
    } catch (err) {
      if (ERROR_LOG === true) { logger.write('[ERROR] finalize -> err = ' + err) }
    }
  }

  function initialize (callBackFunction) {
    if (INFO_LOG === true) { logger.write('[INFO] initialize -> Entering function.') }

        /* Each Time Machine has a Control Panel. */

    controlPanelHandle = canvas.panelsSpace.createNewPanel('Time Control Panel')
    let controlPanel = canvas.panelsSpace.getPanel(controlPanelHandle)

        /* First, we initialize the market that we are going to show first on screen. Later all the other markets will be initialized on the background. */

    let position = 0 // This defines the position of each chart respect to each other.

    let timelineChart = newTimelineChart()

    timelineChart.container.displacement.parentDisplacement = thisObject.container.displacement
    timelineChart.container.frame.parentFrame = thisObject.container.frame

    timelineChart.container.parentContainer = thisObject.container

    timelineChart.container.frame.width = thisObject.container.frame.width * 1
    timelineChart.container.frame.height = thisObject.container.frame.height * 1 * canvas.bottomSpace.chartAspectRatio.aspectRatio.y

    timelineChart.container.frame.position.x = thisObject.container.frame.width / 2 - timelineChart.container.frame.width / 2
    timelineChart.container.frame.position.y = timelineChart.container.frame.height * 1.5 * position

    position++

    timelineChart.initialize(DEFAULT_EXCHANGE, DEFAULT_MARKET, onDefaultInitialized)

    function onDefaultInitialized (err) {
      if (INFO_LOG === true) { logger.write('[INFO] initialize -> onDefaultInitialized -> Entering function.') }

      if (err.result !== GLOBAL.DEFAULT_OK_RESPONSE.result) {
        if (INFO_LOG === true) { logger.write('[INFO] initialize -> onDefaultInitialized -> Initialization of the only market failed.') }

        callBackFunction(err)
        return
      }

      thisObject.charts.push(timelineChart)

      controlPanel.container.eventHandler.listenToEvent('Datetime Changed', timelineChart.setDatetime, undefined)
      timelineChart.container.eventHandler.listenToEvent('Datetime Changed', controlPanel.setDatetime)

      initializeTheRest()
    }

    function initializeTheRest () {
      if (INFO_LOG === true) { logger.write('[INFO] initialize -> initializeTheRest -> Entering function.') }

      let leftToInitialize = SUPPORTED_EXCHANGES.length * SUPPORTED_MARKETS.length - 1 // The default exchange and market was already initialized.
      let alreadyInitialized = 0

      for (let i = 0; i < SUPPORTED_EXCHANGES.length; i++) {
        for (let j = 0; j < SUPPORTED_MARKETS.length; j++) {
          let exchange = SUPPORTED_EXCHANGES[i]
          let market = SUPPORTED_MARKETS[j]

          if (
            exchange === DEFAULT_EXCHANGE &&
            market.assetA === DEFAULT_MARKET.assetA &&
            market.assetB === DEFAULT_MARKET.assetB
          ) { continue }

          initializeTimelineChart(exchange, market)
        }
      }

      function initializeTimelineChart (exchange, market) {
        if (INFO_LOG === true) { logger.write('[INFO] initialize -> initializeTheRest -> initializeTimelineChart -> Entering function.') }

        let timelineChart = newTimelineChart()

        timelineChart.container.displacement.parentDisplacement = thisObject.container.displacement
        timelineChart.container.frame.parentFrame = thisObject.container.frame

        timelineChart.container.parentContainer = thisObject.container

        timelineChart.container.frame.width = thisObject.container.frame.width * 1
        timelineChart.container.frame.height = thisObject.container.frame.height * 1 * canvas.bottomSpace.chartAspectRatio.aspectRatio.y

        timelineChart.container.frame.position.x = thisObject.container.frame.width / 2 - timelineChart.container.frame.width / 2
        timelineChart.container.frame.position.y = timelineChart.container.frame.height * 1.5 * position

        position++

        timelineChart.initialize(exchange, market, finalSteps)

        function finalSteps () {
          if (INFO_LOG === true) { logger.write('[INFO] initialize -> initializeTheRest -> initializeTimelineChart -> finalSteps -> Entering function.') }

          thisObject.charts.push(timelineChart)

          controlPanel.container.eventHandler.listenToEvent('Datetime Changed', timelineChart.setDatetime, undefined)
          timelineChart.container.eventHandler.listenToEvent('Datetime Changed', controlPanel.setDatetime)

          alreadyInitialized++
          console.log('alreadyInitialized ' + alreadyInitialized)
          console.log('leftToInitialize ' + leftToInitialize)
          if (alreadyInitialized === leftToInitialize) {
            callBackFunction(GLOBAL.DEFAULT_OK_RESPONSE)
          }
        }
      }
    }
  }

  function draw () {
    this.container.frame.draw(false, false)

        /* When we draw a time machine, that means also to draw all the charts in it. */

    for (let i = 0; i < this.charts.length; i++) {
      let chart = this.charts[i]
      chart.draw()
    }
  }

  function getContainer (point) {
    if (INFO_LOG === true) { logger.write('[INFO] getContainer -> Entering function.') }

    let container

        /* Now we see which is the inner most container that has it */

    for (let i = 0; i < this.charts.length; i++) {
      container = this.charts[i].getContainer(point)

      if (container !== undefined) {
                /* We found an inner container which has the point. We return it. */

        return container
      }
    }

        /* The point does not belong to any inner container, so we return the current container. */

    return this.container
  }
}