transcend-charts/lib/helpers/Charts.js

Transcend is a charting and graph library for NUVI

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _moment = require('moment');

var _moment2 = _interopRequireDefault(_moment);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

exports.default = {
  yAxis: function yAxis(axisHeight, maxValue, minValue, labelFontSize) {

    // figure out the nice round numbers to use for the y-value labels
    var preferredNumberOfLabels = 5;
    if (axisHeight / preferredNumberOfLabels < labelFontSize * 2) {
      preferredNumberOfLabels = Math.floor(axisHeight / (labelFontSize * 2));
    }

    var avgValueBetweenLabels = Math.ceil((maxValue - minValue) / preferredNumberOfLabels);
    var roundValues = [0.001, 0.01, 0.02, 0.05, 0.1, 0.25, 0.5, 1, 2, 5, 10, 20, 50, 100, 200, 250, 500, 1000, 2000, 5000, 10000, 20000, 30000, 40000, 50000, 100000, 200000, 250000, 500000, 1000000, 2500000, 5000000, 10000000, 25000000, 50000000, 100000000, 250000000, 500000000, 1000000000];
    var computedValueBetweenLabels = undefined;
    var computedDifference = undefined;
    for (var i = 0; i < roundValues.length; i++) {
      var diff = Math.abs(avgValueBetweenLabels - roundValues[i]);
      if (computedDifference === undefined || diff < computedDifference || diff === computedDifference && roundValues[i] > computedValueBetweenLabels) {
        computedDifference = diff;
        computedValueBetweenLabels = roundValues[i];
      }
    }
    var computedNumberOfLabels = Math.ceil((maxValue - minValue) / computedValueBetweenLabels);
    return {
      numberOfLabels: computedNumberOfLabels,
      valueBetweenLabels: computedValueBetweenLabels
    };
  },

  createGuid: function createGuid(length) {
    if (!length || length < 1) {
      length = 10;
    }
    var randomChars = 'abcdefghijklmnopqrstuvwxyz0123456789';
    var randomGuid = '';
    for (var i = 0; i < length; i++) {
      randomGuid += randomChars.charAt(Math.floor(Math.random() * randomChars.length));
    }
    return randomGuid;
  },

  createDateLabels: function createDateLabels(minTimestamp, maxTimestamp, interval) {
    var dateLabels = [];
    var roundedMinTimestamp = this.roundStartDateByInterval(minTimestamp, interval);
    var roundedMaxTimestamp = this.roundEndDateByInterval(maxTimestamp, interval);

    var movingDate = new Date(roundedMinTimestamp);
    while (movingDate.getTime() <= roundedMaxTimestamp) {
      // push tmp onto the dateLabels array
      var date = null;
      var formattedDate = '';
      switch (interval) {
        case 'second':
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('h:mm:ssa');
          movingDate.setSeconds(movingDate.getSeconds() + 1);
          break;
        case 'minute':
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('h:mma');
          movingDate.setMinutes(movingDate.getMinutes() + 1);
          break;
        case 'hour':
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('h:00a');
          movingDate.setHours(movingDate.getHours() + 1);
          break;
        case 'day':
        default:
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('MMM D');
          movingDate.setDate(movingDate.getDate() + 1);
          break;
        case 'month':
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('MMM');
          movingDate.setMonth(movingDate.getMonth() + 1);
          break;
        case 'year':
          date = movingDate.getTime();
          formattedDate = (0, _moment2.default)(movingDate).format('YYYY');
          movingDate.setYear(movingDate.getFullYear() + 1);
          break;
      }
      dateLabels.push({
        date: date,
        datestr: formattedDate
      });
    }
    return dateLabels;
  },

  roundStartDateByInterval: function roundStartDateByInterval(timestamp, interval) {
    var date = new Date(timestamp);
    switch (interval) {
      case 'year':
        date.setMonth(0);
      case 'month':
        date.setDate(1);
      case 'day':
        date.setHours(0);
      case 'hour':
        date.setMinutes(0);
      case 'minute':
        date.setSeconds(0);
      case 'second':
      default:
        date.setMilliseconds(0);
        break;
    }
    return date.getTime();
  },

  roundEndDateByInterval: function roundEndDateByInterval(timestamp, interval) {
    var date = new Date(timestamp);
    switch (interval) {
      case 'year':
        date.setYear(date.getFullYear() + 1);
        date.setMonth(0);
        date.setDate(0);
        date.setHours(0);
        date.setMinutes(0);
        date.setSeconds(0);
        break;
      case 'month':
        date.setMonth(date.getMonth() + 1);
        date.setDate(0);
        date.setHours(0);
        date.setMinutes(0);
        date.setSeconds(0);
        break;
      case 'day':
        date.setDate(date.getDate() + 1);
        date.setHours(0);
        date.setMinutes(0);
        date.setSeconds(0);
        break;
      case 'hour':
        date.setHours(date.getHours() + 1);
        date.setMinutes(0);
        date.setSeconds(0);
        break;
      case 'minute':
        date.setMinutes(date.getMinutes() + 1);
        date.setSeconds(0);
        break;
      case 'second':
      default:
        date.setSeconds(date.getSeconds() + 1);
        break;
    }
    date.setMilliseconds(0);
    return date.getTime();
  }
};