Helpers

Helpers.js

export function empty(val) {
    return (typeof val === 'undefined' || val === '' || val === 0 || val === '0' || val === null
        || val === false || (typeof val === 'object' && !Object.keys(val).length) || (Array.isArray(val) && !val.length )
    );
}

export function apiUrl (path, params, absolut = false) {
  return URL_BASE + path
}

export function findIndexByKey (collection, key, value) {
  return collection.findIndex(el => {
    return el[key] === value
  });
}

export function getMonthLabel (month) {
  let months = ['January', 'February', 'March', 'April', 'May', 'June',
    'July', 'August', 'September', 'October', 'November', 'December'
  ]

  return (typeof months[month] !== 'undefined') ? months[month] : null
}

export function depKeyP (event) {
  // resolve: backspace, delete, tab и escape
  if (event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 27 ||
    // resolve: Ctrl+A
    (event.keyCode == 65 && event.ctrlKey === true) ||
    // resolve: home, end, left, right
    (event.keyCode >= 35 && event.keyCode <= 39)) {

    return
  }

  else {
    // if it is number, stop event keypress
    if ((event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 )) {
      event.preventDefault()
    }
  }
}

export function getTimeZone() {
    var offset = new Date().getTimezoneOffset(),
        o = Math.abs(offset);
    return (offset < 0 ? "+" : "-") + ("00" + Math.floor(o / 60)).slice(-2) + ":" + ("00" + (o % 60)).slice(-2);
}


export function round(val: number, decimals: number) {
  // This only works if |value| ≤ 1e21, otherwise this results in NaN !
  return Number(Math.round(Number(val + 'e' + decimals)) + 'e-' + decimals);
}