Add Luxembourgish (lb) locale

src/locale/lb/_lib/formatDistance/index.js

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+var formatDistanceLocale = {
+  lessThanXSeconds: {
+    standalone: {
+      one: 'manner wéi eng Sekonn',
+      other: 'manner wéi {{count}} Sekonnen'
+    },
+    withPreposition: {
+      one: 'manner wéi enger Sekonn',
+      other: 'manner wéi {{count}} Sekonnen'
+    }
+  },
+
+  xSeconds: {
+    standalone: {
+      one: 'eng Sekonn',
+      other: '{{count}} Sekonnen'
+    },
+    withPreposition: {
+      one: 'enger Sekonn',
+      other: '{{count}} Sekonnen'
+    }
+  },
+
+  halfAMinute: {
+    standalone: 'eng hallef Minutt',
+    withPreposition: 'enger hallwer Minutt'
+  },
+
+  lessThanXMinutes: {
+    standalone: {
+      one: 'manner wéi eng Minutt',
+      other: 'manner wéi {{count}} Minutten'
+    },
+    withPreposition: {
+      one: 'manner wéi enger Minutt',
+      other: 'manner wéi {{count}} Minutten'
+    }
+  },
+
+  xMinutes: {
+    standalone: {
+      one: 'eng Minutt',
+      other: '{{count}} Minutten'
+    },
+    withPreposition: {
+      one: 'enger Minutt',
+      other: '{{count}} Minutten'
+    }
+  },
+
+  aboutXHours: {
+    standalone: {
+      one: 'ongeféier eng Stonn',
+      other: 'ongeféier {{count}} Stonnen'
+    },
+    withPreposition: {
+      one: 'ongeféier enger Stonn',
+      other: 'ongeféier {{count}} Stonnen'
+    }
+  },
+
+  xHours: {
+    standalone: {
+      one: 'eng Stonn',
+      other: '{{count}} Stonnen'
+    },
+    withPreposition: {
+      one: 'enger Stonn',
+      other: '{{count}} Stonnen'
+    }
+  },
+
+  xDays: {
+    standalone: {
+      one: 'een Dag',
+      other: '{{count}} Deeg'
+    },
+    withPreposition: {
+      one: 'engem Dag',
+      other: '{{count}} Deeg'
+    }
+  },
+
+  aboutXWeeks: {
+    standalone: {
+      one: 'ongeféier eng Woch',
+      other: 'ongeféier {{count}} Wochen'
+    },
+    withPreposition: {
+      one: 'ongeféier enger Woche',
+      other: 'ongeféier {{count}} Wochen'
+    }
+  },
+
+  xWeeks: {
+    standalone: {
+      one: 'eng Woch',
+      other: '{{count}} Wochen'
+    },
+    withPreposition: {
+      one: 'enger Woch',
+      other: '{{count}} Wochen'
+    }
+  },
+
+  aboutXMonths: {
+    standalone: {
+      one: 'ongeféier ee Mount',
+      other: 'ongeféier {{count}} Méint'
+    },
+    withPreposition: {
+      one: 'ongeféier engem Mount',
+      other: 'ongeféier {{count}} Méint'
+    }
+  },
+
+  xMonths: {
+    standalone: {
+      one: 'ee Mount',
+      other: '{{count}} Méint'
+    },
+    withPreposition: {
+      one: 'engem Mount',
+      other: '{{count}} Méint'
+    }
+  },
+
+  aboutXYears: {
+    standalone: {
+      one: 'ongeféier ee Joer',
+      other: 'ongeféier {{count}} Joer'
+    },
+    withPreposition: {
+      one: 'ongeféier engem Joer',
+      other: 'ongeféier {{count}} Joer'
+    }
+  },
+
+  xYears: {
+    standalone: {
+      one: 'ee Joer',
+      other: '{{count}} Joer'
+    },
+    withPreposition: {
+      one: 'engem Joer',
+      other: '{{count}} Joer'
+    }
+  },
+
+  overXYears: {
+    standalone: {
+      one: 'méi wéi ee Joer',
+      other: 'méi wéi {{count}} Joer'
+    },
+    withPreposition: {
+      one: 'méi wéi engem Joer',
+      other: 'méi wéi {{count}} Joer'
+    }
+  },
+
+  almostXYears: {
+    standalone: {
+      one: 'bal ee Joer',
+      other: 'bal {{count}} Joer'
+    },
+    withPreposition: {
+      one: 'bal engem Joer',
+      other: 'bal {{count}} Joer'
+    }
+  }
+}
+
+var EXCEPTION_CONSONANTS = ['d', 'h', 'n', 't', 'z']
+var VOWELS = ['a,', 'e', 'i', 'o', 'u']
+var DIGITS_SPOKEN_N_NEEDED = [0, 1, 2, 3, 8, 9]
+var FIRST_TWO_DIGITS_SPOKEN_NO_N_NEEDED = [40, 50, 60, 70]
+
+// Eifeler Regel
+function isFinalNNeeded(nextWords) {
+  var firstLetter = nextWords.charAt(0).toLowerCase()
+  if (
+    VOWELS.indexOf(firstLetter) != -1 ||
+    EXCEPTION_CONSONANTS.indexOf(firstLetter) != -1
+  ) {
+    return true
+  }
+
+  // Numbers would need to converted into words for checking.
+  // Therefore, I have listed the digits that require a preceeding n with a few exceptions.
+  var firstWord = nextWords.split(' ')[0]
+  var number = parseInt(firstWord)
+  if (
+    !isNaN(number) &&
+    DIGITS_SPOKEN_N_NEEDED.indexOf(number % 10) != -1 &&
+    FIRST_TWO_DIGITS_SPOKEN_NO_N_NEEDED.indexOf(
+      parseInt(firstWord.substring(0, 2))
+    ) == -1
+  ) {
+    return true
+  }
+
+  // Omit other checks as they are not expected here.
+  return false
+}
+
+export default function formatDistance(token, count, options) {
+  options = options || {}
+
+  var usageGroup = options.addSuffix
+    ? formatDistanceLocale[token].withPreposition
+    : formatDistanceLocale[token].standalone
+
+  var result
+  if (typeof usageGroup === 'string') {
+    result = usageGroup
+  } else if (count === 1) {
+    result = usageGroup.one
+  } else {
+    result = usageGroup.other.replace('{{count}}', count)
+  }
+
+  if (options.addSuffix) {
+    if (options.comparison > 0) {
+      return 'a' + (isFinalNNeeded(result) ? 'n' : '') + ' ' + result
+    } else {
+      return 'viru' + (isFinalNNeeded(result) ? 'n' : '') + ' ' + result
+    }
+  }
+
+  return result
+}

src/locale/lb/_lib/formatLong/index.js

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+import buildFormatLongFn from '../../../_lib/buildFormatLongFn/index.js'
+
+// DIN 5008: https://de.wikipedia.org/wiki/Datumsformat#DIN_5008
+var dateFormats = {
+  full: 'EEEE, do MMMM y', // Méindeg, 7. Januar 2018
+  long: 'do MMMM y', // 7. Januar 2018
+  medium: 'do MMM y', // 7. Jan 2018
+  short: 'dd.MM.yy' // 07.01.18
+}
+
+var timeFormats = {
+  full: 'HH:mm:ss zzzz',
+  long: 'HH:mm:ss z',
+  medium: 'HH:mm:ss',
+  short: 'HH:mm'
+}
+
+var dateTimeFormats = {
+  full: "{{date}} 'um' {{time}}",
+  long: "{{date}} 'um' {{time}}",
+  medium: '{{date}} {{time}}',
+  short: '{{date}} {{time}}'
+}
+
+var formatLong = {
+  date: buildFormatLongFn({
+    formats: dateFormats,
+    defaultWidth: 'full'
+  }),
+
+  time: buildFormatLongFn({
+    formats: timeFormats,
+    defaultWidth: 'full'
+  }),
+
+  dateTime: buildFormatLongFn({
+    formats: dateTimeFormats,
+    defaultWidth: 'full'
+  })
+}
+
+export default formatLong

src/locale/lb/_lib/formatRelative/index.js

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+var formatRelativeLocale = {
+  lastWeek: function(date) {
+    var day = date.getUTCDay()
+    var result = "'läschte"
+    if (day === 2 || day === 4) {
+      // Eifeler Regel: Add an n before the consonant d; Here "Dënschdeg" "and Donneschde".
+      result += 'n'
+    }
+    result += "' eeee 'um' p"
+    return result
+  },
+  yesterday: "'gëschter um' p",
+  today: "'haut um' p",
+  tomorrow: "'moien um' p",
+  nextWeek: "eeee 'um' p",
+  other: 'P'
+}
+
+export default function formatRelative(token, date, _baseDate, _options) {
+  var format = formatRelativeLocale[token]
+
+  if (typeof format === 'function') {
+    return format(date)
+  }
+
+  return format
+}