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index.js
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index.js
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const blessed = require('blessed')
const contrib = require('blessed-contrib')
const api = require('./libs/api')
const utils = require('./libs/utils')
const wash = require('./libs/wash')
const exchangers = require('./config/exchangers')
class Whale {
constructor(args, exchange, markets) {
this.cacheData = {}
this.fetchPrice(exchange, markets).then((data) => {
this.screen = blessed.screen()
this.grid = new contrib.grid({ rows: 12, cols: 12, screen: this.screen })
this.cacheData = data
this.initDashBoard(data, exchange)
this.eventListeners(args, exchange, markets)
}).catch((err) => {
console.error('fetchPrice', err)
process.exit(1)
})
}
fetchPrice(exchange, markets) {
const currentMarket = markets[0]
return new Promise((resolve, reject) => {
Promise.all([
api.getCurrentPrice(exchange, markets),
api.getPriceTrend(exchange, currentMarket),
]).then((res) => {
resolve({
currentPrice: wash.currentPrice(exchange, res[0]),
priceTrend: res[1],
})
}).catch((err) => {
reject(err)
})
})
}
initDashBoard(data, exchange) {
this.table = this.grid.set(0, 0, 6, 12, contrib.table,
{ keys: true
, vi: true
, fg: 'white'
, selectedFg: 'white'
, selectedBg: 'cyan'
, interactive: true
, label: `${exchange} -- Current Price`
, border: { type: "line", fg: "cyan" }
, columnSpacing: 10
, columnWidth: [10, 10, 10] })
this.line = this.grid.set(6, 0, 5, 12, contrib.line,
{ label: 'Price Trend (recent month)'
, showLegend: true })
this.log = this.grid.set(11, 0, 1, 12, contrib.log,
{ fg: "green"
, selectedFg: "green"
, label: 'Server Log' })
this.createTable(data.currentPrice)
this.createLine(data.priceTrend)
this.createLog(utils.formatCurrentTime())
}
eventListeners(args, exchange, markets) {
this.timer = setInterval(() => {
this.createLog('Loading...')
api.getCurrentPrice(exchange, markets).then((res) => {
this.createTable(wash.currentPrice(exchange, res))
this.createLog(utils.formatCurrentTime())
}).catch((err) => {
console.error(`\n Load failure: ${err}`)
process.exit(1)
})
}, 1000 * (Number.isInteger(args.seconds) ? args.seconds : 180))
this.table.rows.on('select', (item, selectedIndex) => {
this.updatePriceTrend(exchange, this.cacheData.currentPrice[selectedIndex][0])
})
this.screen.on('resize', () => {
utils.throttle(() => {
this.initDashBoard(this.cacheData)
}, 360)()
})
this.screen.key(['escape', 'q', 'C-c'], function(ch, key) {
this.timer && clearInterval(this.timer)
return process.exit(0)
})
}
createTable(data) {
this.table.setData({
headers: ['Asset Name', 'Price', 'Change'],
data: data,
})
this.table.focus()
this.screen.render()
}
createLine(data) {
const series = {
title: data.currentMarket,
x: data.labels,
y: data.closePricesList,
}
this.line.setData(series)
this.screen.render()
}
createLog(data) {
this.log.log(data)
this.screen.render()
}
updatePriceTrend(exchange, selectedMarket) {
this.createLog(`Loading ${selectedMarket} data...`)
api.getPriceTrend(exchange, selectedMarket).then((data) => {
this.createLine(data)
this.createLog(utils.formatCurrentTime())
}).catch((err) => {
console.error('updatePriceTrend', err)
process.exit(1)
})
}
}
module.exports = Whale