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EDITING: formats.js

/*
 * Copyright (C) 2021 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import moment from 'moment'

export default function getFormats({ customI18nFormats }) {
  const i18nFormatsForCurrentLocale = customI18nFormats.map(x => x()).filter(x => !!x)
  const momentCompatibleI18nFormats = specifyMinutesImplicitly(
    i18nFormatsForCurrentLocale
  ).map(convertI18nFormatToMomentFormat)

return union(momentStockFormats, momentCompatibleI18nFormats)
}

const union = (a, b) => b.reduce((acc, x) => {
  if (!acc.includes(x)) {
    acc.push(x)
  }

return acc
}, [].concat(a))

const i18nToMomentTokenMapping = {
  '%A': 'dddd',
  '%B': 'MMMM',
  '%H': 'HH',
  '%M': 'mm',
  '%S': 'ss',
  '%P': 'a',
  '%Y': 'YYYY',
  '%a': 'ddd',
  '%b': 'MMM',
  '%m': 'M',
  '%d': 'D',
  '%k': 'H',
  '%l': 'h',
  '%z': 'Z',

'%-H': 'H',
  '%-M': 'm',
  '%-S': 's',
  '%-m': 'M',
  '%-d': 'D',
  '%-k': 'H',
  '%-l': 'h'
}

const momentStockFormats = [
  moment.ISO_8601,
  'YYYY',
  'LT',
  'LTS',
  'L',
  'l',
  'LL',
  'll',
  'LLL',
  'lll',
  'LLLL',
  'llll',
  'D MMM YYYY',
  'H:mm'
]

// expand every i18n format that specifies minutes (%M or %-M) into two: one
// that specifies the minutes and another that doesn't
//
// why? don't ask me
const specifyMinutesImplicitly = (formats) => formats.map(format =>
  format.match(/:%-?M/) ?
    [format, format.replace(/:%-?M/, '')] :
    [format]
).flat(1)

const convertI18nFormatToMomentFormat = i18nFormat => {
  const escapeNonI18nTokens = (string) => (
    string.split(' ').map(escapeUnlessIsI18nToken).join(' ')
  )

const escapeUnlessIsI18nToken = (string) => {
    const isKey = Object.keys(i18nToMomentTokenMapping).find(k => string.indexOf(k) > -1)

return isKey ? string : `[${string}]`
  }

const escapedI18nFormat = escapeNonI18nTokens(i18nFormat)

return Object.keys(i18nToMomentTokenMapping).reduce((acc, i18nToken) => (
    acc.replace(i18nToken, i18nToMomentTokenMapping[i18nToken])
  ), escapedI18nFormat)
}

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📄 formats.js	JS	2.5 KB	2023-09-24 03:36	EDIT
📄 index.js	JS	3.1 KB	2023-09-24 03:36	EDIT
📄 package.json	JSON	413 B	2023-09-24 03:36	EDIT
📄 test.js	JS	4.5 KB	2023-09-24 03:36	EDIT