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{ clone } from './DateUtils';\nimport { getFirstDayOfWeek } from './LocaleUtils';\n\nexport function cancelEvent(e) {\n  e.preventDefault();\n  e.stopPropagation();\n}\n\nexport function getCustomProps(props, propTypes) {\n  const customProps = {};\n  Object.keys(props)\n      .filter(propName => !{}.hasOwnProperty.call(propTypes, propName))\n      .forEach((propName) => {\n        customProps[propName] = props[propName];\n      });\n  return customProps;\n}\n\nexport function getFirstDayOfMonth(d) {\n  return new Date(d.getFullYear(), d.getMonth(), 1, 12);\n}\n\nexport function getDaysInMonth(d) {\n  const resultDate = getFirstDayOfMonth(d);\n\n  resultDate.setMonth(resultDate.getMonth() + 1);\n  resultDate.setDate(resultDate.getDate() - 1);\n\n  return resultDate.getDate();\n}\n\nexport function getModifiersFromProps(props) {\n  const modifiers = { ...props.modifiers };\n  if (props.selectedDays) {\n    modifiers.selected = props.selectedDays;\n  }\n  if (props.disabledDays) {\n    modifiers.disabled = props.disabledDays;\n  }\n  return modifiers;\n}\n\nexport function getFirstDayOfWeekFromProps(props) {\n  const { firstDayOfWeek, locale = 'en', localeUtils = {} } = props;\n  if (!isNaN(firstDayOfWeek)) {\n    return firstDayOfWeek;\n  }\n  if (localeUtils.getFirstDayOfWeek) {\n    return localeUtils.getFirstDayOfWeek(locale);\n  }\n  return 0;\n}\n\nexport function getModifiersForDay(d, modifierFunctions = {}) {\n  return Object.keys(modifierFunctions).reduce((modifiers, modifier) => {\n    const func = modifierFunctions[modifier];\n    if (func(d)) {\n      modifiers.push(modifier);\n    }\n    return modifiers;\n  }, []);\n}\n\nexport function getMonthsDiff(d1, d2) {\n  return (d2.getMonth() - d1.getMonth()) +\n    (12 * (d2.getFullYear() - d1.getFullYear()));\n}\n\nexport function getWeekArray(d, firstDayOfWeek = getFirstDayOfWeek(), fixedWeeks) {\n  const daysInMonth = getDaysInMonth(d);\n  const dayArray = [];\n\n  let week = [];\n  const weekArray = [];\n\n  for (let i = 1; i <= daysInMonth; i += 1) {\n    dayArray.push(new Date(d.getFullYear(), d.getMonth(), i, 12));\n  }\n\n  dayArray.forEach((day) => {\n    if (week.length > 0 && day.getDay() === firstDayOfWeek) {\n      weekArray.push(week);\n      week = [];\n    }\n    week.push(day);\n    if (dayArray.indexOf(day) === dayArray.length - 1) {\n      weekArray.push(week);\n    }\n  });\n\n  // unshift days to start the first week\n  const firstWeek = weekArray[0];\n  for (let i = 7 - firstWeek.length; i > 0; i -= 1) {\n    const outsideDate = clone(firstWeek[0]);\n    outsideDate.setDate(firstWeek[0].getDate() - 1);\n    firstWeek.unshift(outsideDate);\n  }\n\n  // push days until the end of the last week\n  const lastWeek = weekArray[weekArray.length - 1];\n  for (let i = lastWeek.length; i < 7; i += 1) {\n    const outsideDate = clone(lastWeek[lastWeek.length - 1]);\n    outsideDate.setDate(lastWeek[lastWeek.length - 1].getDate() + 1);\n    lastWeek.push(outsideDate);\n  }\n\n  // add extra weeks to reach 6 weeks\n  if (fixedWeeks && weekArray.length < 6) {\n    let lastExtraWeek;\n\n    for (let i = weekArray.length; i < 6; i += 1) {\n      lastExtraWeek = weekArray[weekArray.length - 1];\n      const lastDay = lastExtraWeek[lastExtraWeek.length - 1];\n      const extraWeek = [];\n\n      for (let j = 0; j < 7; j += 1) {\n        const outsideDate = clone(lastDay);\n        outsideDate.setDate(lastDay.getDate() + j + 1);\n        extraWeek.push(outsideDate);\n      }\n\n      weekArray.push(extraWeek);\n    }\n  }\n\n  return weekArray;\n}\n\nexport function startOfMonth(d) {\n  const newDate = clone(d);\n  newDate.setDate(1);\n  newDate.setHours(12, 0, 0, 0); // always set noon to avoid time zone issues\n  return newDate;\n}\n"]}