Function createDataLoader

debug/main.js:137–170

()

}

function createDataLoader () {
  return {
    getBars: ({ type, timestamp, period, callback }) => {
      let dataList = []
      switch (type) {
        case 'init': {
          const duration = getPeriodDuration(period)
          dataList = createBackDataList(2680, (timestamp ?? Date.now()) - LOAD_BAR_COUNT * duration, period)
          break
        }
        case 'forward': {
          const historyDataList = chart.getDataList()
          const firstData = historyDataList[0]
          dataList = createForwardDataList(firstData.open, timestamp, period)
          break
        }
        case 'backward': {
          const historyDataList = chart.getDataList()
          const lastData = historyDataList[historyDataList.length - 1]
          dataList = createBackDataList(lastData.close, timestamp, period)
          break
        }
      }
      // callback(dataList, { forward: true, backward: true })
      setTimeout(() => {
        callback(dataList, { forward: true, backward: true })
      }, 1000)
    },
    subscribeBar: ({ period, callback }) => {
    },
    unsubscribeBar: () => {
    }
  }
}

function switchPeriod (periodKey) {
  const config = PERIODS.find(({ key }) => key === periodKey)