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node_modules/iso8601-duration/src/index.js

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+/**
+ * @description A module for parsing ISO8601 durations
+ */
+
+/**
+ * The pattern used for parsing ISO8601 duration (PnYnMnDTnHnMnS).
+ * This does not cover the week format PnW.
+ */
+
+// PnYnMnDTnHnMnS
+const numbers = '\\d+(?:[\\.,]\\d+)?'
+const weekPattern = `(${numbers}W)`
+const datePattern = `(${numbers}Y)?(${numbers}M)?(${numbers}D)?`
+const timePattern = `T(${numbers}H)?(${numbers}M)?(${numbers}S)?`
+
+const iso8601 = `P(?:${weekPattern}|${datePattern}(?:${timePattern})?)`
+const objMap = ['weeks', 'years', 'months', 'days', 'hours', 'minutes', 'seconds']
+
+/**
+ * The ISO8601 regex for matching / testing durations
+ */
+export const pattern = new RegExp(iso8601)
+
+/** Parse PnYnMnDTnHnMnS format to object
+ * @param {string} durationString - PnYnMnDTnHnMnS formatted string
+ * @return {Object} - With a property for each part of the pattern
+ */
+export const parse = durationString => {
+  // Slice away first entry in match-array
+  return durationString.match(pattern).slice(1).reduce((prev, next, idx) => {
+    prev[objMap[idx]] = parseFloat(next) || 0
+    return prev
+  }, {})
+}
+
+/**
+ * Convert ISO8601 duration object to an end Date.
+ *
+ * @param {Object} duration - The duration object
+ * @param {Date} startDate - The starting Date for calculating the duration
+ * @return {Date} - The resulting end Date
+ */
+export const end = (duration, startDate) => {
+  // Create two equal timestamps, add duration to 'then' and return time difference
+  const timestamp = (startDate ? startDate.getTime() : Date.now())
+  const then = new Date(timestamp)
+
+  then.setFullYear(then.getFullYear() + duration.years)
+  then.setMonth(then.getMonth() + duration.months)
+  then.setDate(then.getDate() + duration.days)
+  then.setHours(then.getHours() + duration.hours)
+  then.setMinutes(then.getMinutes() + duration.minutes)
+  // Then.setSeconds(then.getSeconds() + duration.seconds);
+  then.setMilliseconds(then.getMilliseconds() + (duration.seconds * 1000))
+  // Special case weeks
+  then.setDate(then.getDate() + (duration.weeks * 7))
+
+  return then
+}
+
+/**
+ * Convert ISO8601 duration object to seconds
+ *
+ * @param {Object} duration - The duration object
+ * @param {Date} startDate - The starting point for calculating the duration
+ * @return {Number}
+ */
+export const toSeconds = (duration, startDate) => {
+  const timestamp = (startDate ? startDate.getTime() : Date.now())
+  const now = new Date(timestamp)
+  const then = end(duration, now)
+
+  const seconds = (then.getTime() - now.getTime()) / 1000
+  return seconds
+}
+
+export default {
+  end,
+  toSeconds,
+  pattern,
+  parse
+}