Avanza tools

ext.js

// ==UserScript==
// @name     Avanza tools
// @version  1
// @grant    none
// ==/UserScript==
HTMLCollection.prototype.toArray = function(){ return Array.from(this) }
const realConcat = Array.prototype.concat
Array.prototype.concat = function() {
  if(arguments.length) return realConcat.apply(this, arguments)
  else return realConcat.apply([], this)
}


const getInterestingTables = ()=>
  document.getElementsByTagName('table').toArray()
    .map(t => ({table: t, name: t.caption && t.caption.firstElementChild.textContent.trim()}))
    .filter(t=>t.name)
    .reduce((acc, {name, table}) => ({...acc, [name]: table}), {})

const getTableColIdx = name => table =>
  table.tHead.rows[0].cells.toArray()
    .map((c, i) => c.textContent.trim() == name && i)
    .filter(v=>v!==false)[0]

const colObject = colMap => table =>
  table.tBodies.toArray()
    .map(t => 
      t.rows.toArray()
        .map(r => arrToObj(['idx', colMap])(r.cells.toArray()))
    )
    .concat()

const arrToObj = ([kind, mapper]) => a => a.reduce((acc, v, i) => {
  if(kind === 'string') acc[v[mapper.name]] = mapper.fn(v)
  else if(kind === 'idx' && mapper[i]) acc[mapper[i].name] = mapper[i].fn(v)
  return acc
}, {})

const trimedName = e => e.textContent.replace(/\s+/g, ' ').trim()
const parseNumber = n => +n.replace(/[^\d.,]/g, '').replace(/,/g, '.')
const trimParse = e => parseNumber(trimedName(e))

const nameCol = getTableColIdx('Värdepapper')
const valCol = getTableColIdx('Markn.värde')
const nameValueCol = t => ({[nameCol(t)]: {name: 'name', fn: trimedName}, [valCol(t)]: {name: 'value', fn: trimParse}})

const avkastning = t => colObject(nameValueCol(t))(t)

//console.log(arrToObj(['string', {name: 'name', fn: o=>o.value}])(avkastning(getInterestingTables().Fonder)))



const räntefonder = ['KPA Etisk Räntefond', 'Swedbank Robur Penningmarknadsfond', 'Spiltan Räntefond Sverige', 'AMF Räntefond Lång', 'SPP Obligationsfond', 'Handelsbanken Realräntefond', 'Öhman Obligationsfond A']

const getBondPercentage = ()=>{
  const values = avkastning(getInterestingTables().Fonder)
  const bonds = values.filter(v => räntefonder.indexOf(v.name) !== -1).reduce((acc, v) => acc + v.value, 0)
  const other = values.filter(v => räntefonder.indexOf(v.name) === -1).reduce((acc, v) => acc + v.value, 0)
  
  return bonds/(bonds+other)
}

const percentageString = v => Math.round(v*10000)/100 + '%'

const addPercentage = p => {
  const foot = getInterestingTables().Fonder.tFoot.rows[0]
  foot.cells[0].colSpan = 2
  foot.insertCell(1).textContent = p

  const newRow = document.getElementsByTagName('table')[0].tBodies[0].insertRow()
  newRow.insertCell().textContent = 'Andel räntefonder'
  const pCell = newRow.insertCell()
  pCell.textContent = p
  pCell.style.textAlign = 'right'
}

addPercentage(percentageString(getBondPercentage()))