@nteract/timeago/lib/formatters/buildFormatter.js

A simple Time-Ago component for React

"use strict";

var _interopRequireDefault = require("@babel/runtime-corejs2/helpers/interopRequireDefault");

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

var _now = _interopRequireDefault(require("@babel/runtime-corejs2/core-js/date/now"));

var _parseInt2 = _interopRequireDefault(require("@babel/runtime-corejs2/core-js/parse-int"));

// If the numbers array is present, format numbers with it,
// otherwise just cast the number to a string and return it
var normalizeNumber = function normalizeNumber(numbers, value) {
  return numbers && numbers.length === 10 ? String(value).split("").map(function (digit) {
    return digit.match(/^[0-9]$/) ? numbers[(0, _parseInt2.default)(digit)] : digit;
  }).join("") : String(value);
}; // Take a string or a function that takes number of days and returns a string
// and provide a uniform API to create string parts


var normalizeFn = function normalizeFn(value, millisDelta, numbers) {
  return function (stringOrFn) {
    return typeof stringOrFn === "function" ? stringOrFn(value, millisDelta).replace(/%d/g, normalizeNumber(numbers, value)) : stringOrFn.replace(/%d/g, normalizeNumber(numbers, value));
  };
};

function buildFormatter(strings) {
  return function formatter(value, unit, suffix, epochMillis) {
    // convert weeks to days if strings don't handle weeks
    var now = (0, _now.default)();

    if (unit === "week" && !strings.week && !strings.weeks) {
      var days = Math.round(Math.abs(epochMillis - now) / (1000 * 60 * 60 * 24));
      value = days;
      unit = "day";
    } // create a normalize function for given value


    var normalize = normalizeFn(value, now - epochMillis, strings.numbers); // The eventual return value stored in an array so that the wordSeparator can be used

    var dateString = []; // handle prefixes

    if (suffix === "ago" && strings.prefixAgo) {
      dateString.push(normalize(strings.prefixAgo));
    }

    if (suffix === "from now" && strings.prefixFromNow) {
      dateString.push(normalize(strings.prefixFromNow));
    } // Handle Main number and unit


    var isPlural = value > 1;

    if (isPlural) {
      var stringFn = strings[unit + "s"] || strings[unit] || "%d " + unit;
      dateString.push(normalize(stringFn));
    } else {
      var _stringFn = strings[unit] || strings[unit + "s"] || "%d " + unit;

      dateString.push(normalize(_stringFn));
    } // Handle Suffixes


    if (suffix === "ago" && strings.suffixAgo) {
      dateString.push(normalize(strings.suffixAgo));
    }

    if (suffix === "from now" && strings.suffixFromNow) {
      dateString.push(normalize(strings.suffixFromNow));
    } // join the array into a string and return it


    var wordSeparator = typeof strings.wordSeparator === "string" ? strings.wordSeparator : " ";
    return dateString.join(wordSeparator);
  };
}