text: 
  /*!
   * Date picker for pickadate.js v3.5.4
   * http://amsul.github.io/pickadate.js/date.htm
   */
  
  (function ( factory ) {
  
      // AMD.
      if ( typeof define == 'function' && define.amd )
          define( ['picker','jquery'], factory )
  
      // Node.js/browserify.
      else if ( typeof exports == 'object' )
          module.exports = factory( require('./picker.js'), require('jquery') )
  
      // Browser globals.
      else factory( Picker, jQuery )
  
  }(function( Picker, $ ) {
  
  
  /**
   * Globals and constants
   */
  var DAYS_IN_WEEK = 7,
      WEEKS_IN_CALENDAR = 6,
      _ = Picker._
  
  
  
  /**
   * The date picker constructor
   */
  function DatePicker( picker, settings ) {
  
      var calendar = this,
          element = picker.$node[ 0 ],
          elementValue = element.value,
          elementDataValue = picker.$node.data( 'value' ),
          valueString = elementDataValue || elementValue,
          formatString = elementDataValue ? settings.formatSubmit : settings.format,
          isRTL = function() {
  
              return element.currentStyle ?
  
                  // For IE.
                  element.currentStyle.direction == 'rtl' :
  
                  // For normal browsers.
                  getComputedStyle( picker.$root[0] ).direction == 'rtl'
          }
  
      calendar.settings = settings
      calendar.$node = picker.$node
  
      // The queue of methods that will be used to build item objects.
      calendar.queue = {
          min: 'measure create',
          max: 'measure create',
          now: 'now create',
          select: 'parse create validate',
          highlight: 'parse navigate create validate',
          view: 'parse create validate viewset',
          disable: 'deactivate',
          enable: 'activate'
      }
  
      // The component's item object.
      calendar.item = {}
  
      calendar.item.clear = null
      calendar.item.disable = ( settings.disable || [] ).slice( 0 )
      calendar.item.enable = -(function( collectionDisabled ) {
          return collectionDisabled[ 0 ] === true ? collectionDisabled.shift() : -1
      })( calendar.item.disable )
  
      calendar.
          set( 'min', settings.min ).
          set( 'max', settings.max ).
          set( 'now' )
  
      // When there’s a value, set the `select`, which in turn
      // also sets the `highlight` and `view`.
      if ( valueString ) {
          calendar.set( 'select', valueString, { format: formatString })
      }
  
      // If there’s no value, default to highlighting “today”.
      else {
          calendar.
              set( 'select', null ).
              set( 'highlight', calendar.item.now )
      }
  
  
      // The keycode to movement mapping.
      calendar.key = {
          40: 7, // Down
          38: -7, // Up
          39: function() { return isRTL() ? -1 : 1 }, // Right
          37: function() { return isRTL() ? 1 : -1 }, // Left
          go: function( timeChange ) {
              var highlightedObject = calendar.item.highlight,
                  targetDate = new Date( Date.UTC(highlightedObject.year, highlightedObject.month, highlightedObject.date + timeChange) )
              calendar.set(
                  'highlight',
                  targetDate,
                  { interval: timeChange }
              )
              this.render()
          }
      }
  
  
      // Bind some picker events.
      picker.
          on( 'render', function() {
              picker.$root.find( '.' + settings.klass.selectMonth ).on( 'change', function() {
                  var value = this.value
                  if ( value ) {
                      picker.set( 'highlight', [ picker.get( 'view' ).year, value, picker.get( 'highlight' ).date ] )
                      picker.$root.find( '.' + settings.klass.selectMonth ).trigger( 'focus' )
                  }
              })
              picker.$root.find( '.' + settings.klass.selectYear ).on( 'change', function() {
                  var value = this.value
                  if ( value ) {
                      picker.set( 'highlight', [ value, picker.get( 'view' ).month, picker.get( 'highlight' ).date ] )
                      picker.$root.find( '.' + settings.klass.selectYear ).trigger( 'focus' )
                  }
              })
          }, 1 ).
          on( 'open', function() {
              var includeToday = ''
              if ( calendar.disabled( calendar.get('now') ) ) {
                  includeToday = ':not(.' + settings.klass.buttonToday + ')'
              }
              picker.$root.find( 'button' + includeToday + ', select' ).attr( 'disabled', false )
          }, 1 ).
          on( 'close', function() {
              picker.$root.find( 'button, select' ).attr( 'disabled', true )
          }, 1 )
  
  } //DatePicker
  
  
  /**
   * Set a datepicker item object.
   */
  DatePicker.prototype.set = function( type, value, options ) {
  
      var calendar = this,
          calendarItem = calendar.item
  
      // If the value is `null` just set it immediately.
      if ( value === null ) {
          if ( type == 'clear' ) type = 'select'
          calendarItem[ type ] = value
          return calendar
      }
  
      // Otherwise go through the queue of methods, and invoke the functions.
      // Update this as the time unit, and set the final value as this item.
      // * In the case of `enable`, keep the queue but set `disable` instead.
      //   And in the case of `flip`, keep the queue but set `enable` instead.
      calendarItem[ ( type == 'enable' ? 'disable' : type == 'flip' ? 'enable' : type ) ] = calendar.queue[ type ].split( ' ' ).map( function( method ) {
          value = calendar[ method ]( type, value, options )
          return value
      }).pop()
  
      // Check if we need to cascade through more updates.
      if ( type == 'select' ) {
          calendar.set( 'highlight', calendarItem.select, options )
      }
      else if ( type == 'highlight' ) {
          calendar.set( 'view', calendarItem.highlight, options )
      }
      else if ( type.match( /^(flip|min|max|disable|enable)$/ ) ) {
          if ( calendarItem.select && calendar.disabled( calendarItem.select ) ) {
              calendar.set( 'select', calendarItem.select, options )
          }
          if ( calendarItem.highlight && calendar.disabled( calendarItem.highlight ) ) {
              calendar.set( 'highlight', calendarItem.highlight, options )
          }
      }
  
      return calendar
  } //DatePicker.prototype.set
  
  
  /**
   * Get a datepicker item object.
   */
  DatePicker.prototype.get = function( type ) {
      return this.item[ type ]
  } //DatePicker.prototype.get
  
  
  /**
   * Create a picker date object.
   */
  DatePicker.prototype.create = function( type, value, options ) {
  
      var isInfiniteValue,
          calendar = this
  
      // If there’s no value, use the type as the value.
      value = value === undefined ? type : value
  
  
      // If it’s infinity, update the value.
      if ( value == -Infinity || value == Infinity ) {
          isInfiniteValue = value
      }
  
      // If it’s an object, use the native date object.
      else if ( $.isPlainObject( value ) && _.isInteger( value.pick ) ) {
          value = value.obj
      }
  
      // If it’s an array, convert it into a date and make sure
      // that it’s a valid date – otherwise default to today.
      else if ( $.isArray( value ) ) {
          value = new Date(Date.UTC(value[ 0 ], value[ 1 ], value[ 2 ] ))
          value = _.isDate( value ) ? value : calendar.create().obj
      }
  
      // If it’s a number, make a normalized date.
      else if ( _.isInteger( value ) ) {
          value = calendar.normalize( new Date( value ), options )
      }
  
      // If it’s a date object, make a normalized date.
      else if ( _.isDate( value ) ) {
          value = calendar.normalize( value, options )
      }
  
      // If it’s a literal true or any other case, set it to now.
      else /*if ( value === true )*/ {
          value = calendar.now( type, value, options )
      }
  
      // Return the compiled object.
      return {
          year: isInfiniteValue || value.getUTCFullYear(),
          month: isInfiniteValue || value.getUTCMonth(),
          date: isInfiniteValue || value.getUTCDate(),
          day: isInfiniteValue || value.getUTCDay(),
          obj: isInfiniteValue || value,
          pick: isInfiniteValue || value.getTime()
      }
  } //DatePicker.prototype.create
  
  
  /**
   * Create a range limit object using an array, date object,
   * literal “true”, or integer relative to another time.
   */
  DatePicker.prototype.createRange = function( from, to ) {
  
      var calendar = this,
          createDate = function( date ) {
              if ( date === true || $.isArray( date ) || _.isDate( date ) ) {
                  return calendar.create( date )
              }
              return date
          }
  
      // Create objects if possible.
      if ( !_.isInteger( from ) ) {
          from = createDate( from )
      }
      if ( !_.isInteger( to ) ) {
          to = createDate( to )
      }
  
      // Create relative dates.
      if ( _.isInteger( from ) && $.isPlainObject( to ) ) {
          from = [ to.year, to.month, to.date + from ];
      }
      else if ( _.isInteger( to ) && $.isPlainObject( from ) ) {
          to = [ from.year, from.month, from.date + to ];
      }
  
      return {
          from: createDate( from ),
          to: createDate( to )
      }
  } //DatePicker.prototype.createRange
  
  
  /**
   * Check if a date unit falls within a date range object.
   */
  DatePicker.prototype.withinRange = function( range, dateUnit ) {
      range = this.createRange(range.from, range.to)
      return dateUnit.pick >= range.from.pick && dateUnit.pick <= range.to.pick
  }
  
  
  /**
   * Check if two date range objects overlap.
   */
  DatePicker.prototype.overlapRanges = function( one, two ) {
  
      var calendar = this
  
      // Convert the ranges into comparable dates.
      one = calendar.createRange( one.from, one.to )
      two = calendar.createRange( two.from, two.to )
  
      return calendar.withinRange( one, two.from ) || calendar.withinRange( one, two.to ) ||
          calendar.withinRange( two, one.from ) || calendar.withinRange( two, one.to )
  }
  
  
  /**
   * Get the date today.
   */
  DatePicker.prototype.now = function( type, value, options ) {
      value = new Date()
      if ( options && options.rel ) {
          value.setUTCDate( value.getUTCDate() + options.rel )
      }
      return this.normalize( value, options )
  }
  
  
  /**
   * Navigate to next/prev month.
   */
  DatePicker.prototype.navigate = function( type, value, options ) {
  
      var targetDateObject,
          targetYear,
          targetMonth,
          targetDate,
          isTargetArray = $.isArray( value ),
          isTargetObject = $.isPlainObject( value ),
          viewsetObject = this.item.view/*,
          safety = 100*/
  
  
      if ( isTargetArray || isTargetObject ) {
  
          if ( isTargetObject ) {
              targetYear = value.year
              targetMonth = value.month
              targetDate = value.date
          }
          else {
              targetYear = +value[0]
              targetMonth = +value[1]
              targetDate = +value[2]
          }
  
          // If we’re navigating months but the view is in a different
          // month, navigate to the view’s year and month.
          if ( options && options.nav && viewsetObject && viewsetObject.month !== targetMonth ) {
              targetYear = viewsetObject.year
              targetMonth = viewsetObject.month
          }
  
          // Figure out the expected target year and month.
          targetDateObject = new Date( Date.UTC( targetYear, targetMonth + ( options && options.nav ? options.nav : 0 ), 1 ) )
          targetYear = targetDateObject.getUTCFullYear()
          targetMonth = targetDateObject.getUTCMonth()
  
          // If the month we’re going to doesn’t have enough days,
          // keep decreasing the date until we reach the month’s last date.
          while ( /*safety &&*/ new Date( Date.UTC( targetYear, targetMonth, targetDate ) ).getUTCMonth() !== targetMonth ) {
              targetDate -= 1
              /*safety -= 1
              if ( !safety ) {
                  throw 'Fell into an infinite loop while navigating to ' + new Date( targetYear, targetMonth, targetDate ) + '.'
              }*/
          }
  
          value = [ targetYear, targetMonth, targetDate ]
      }
  
      return value
  } //DatePicker.prototype.navigate
  
  
  /**
   * Normalize a date by setting the hours to midnight.
   */
  DatePicker.prototype.normalize = function( value/*, options*/ ) {
      value.setUTCHours( 0, 0, 0, 0 )
      return value
  }
  
  
  /**
   * Measure the range of dates.
   */
  DatePicker.prototype.measure = function( type, value/*, options*/ ) {
  
      var calendar = this
  
      // If it’s anything false-y, remove the limits.
      if ( !value ) {
          value = type == 'min' ? -Infinity : Infinity
      }
  
      // If it’s a string, parse it.
      else if ( typeof value == 'string' ) {
          value = calendar.parse( type, value )
      }
  
      // If it's an integer, get a date relative to today.
      else if ( _.isInteger( value ) ) {
          value = calendar.now( type, value, { rel: value } )
      }
  
      return value
  } ///DatePicker.prototype.measure
  
  
  /**
   * Create a viewset object based on navigation.
   */
  DatePicker.prototype.viewset = function( type, dateObject/*, options*/ ) {
      return this.create([ dateObject.year, dateObject.month, 1 ])
  }
  
  
  /**
   * Validate a date as enabled and shift if needed.
   */
  DatePicker.prototype.validate = function( type, dateObject, options ) {
  
      var calendar = this,
  
          // Keep a reference to the original date.
          originalDateObject = dateObject,
  
          // Make sure we have an interval.
          interval = options && options.interval ? options.interval : 1,
  
          // Check if the calendar enabled dates are inverted.
          isFlippedBase = calendar.item.enable === -1,
  
          // Check if we have any enabled dates after/before now.
          hasEnabledBeforeTarget, hasEnabledAfterTarget,
  
          // The min & max limits.
          minLimitObject = calendar.item.min,
          maxLimitObject = calendar.item.max,
  
          // Check if we’ve reached the limit during shifting.
          reachedMin, reachedMax,
  
          // Check if the calendar is inverted and at least one weekday is enabled.
          hasEnabledWeekdays = isFlippedBase && calendar.item.disable.filter( function( value ) {
  
              // If there’s a date, check where it is relative to the target.
              if ( $.isArray( value ) ) {
                  var dateTime = calendar.create( value ).pick
                  if ( dateTime < dateObject.pick ) hasEnabledBeforeTarget = true
                  else if ( dateTime > dateObject.pick ) hasEnabledAfterTarget = true
              }
  
              // Return only integers for enabled weekdays.
              return _.isInteger( value )
          }).length/*,
  
          safety = 100*/
  
  
  
      // Cases to validate for:
      // [1] Not inverted and date disabled.
      // [2] Inverted and some dates enabled.
      // [3] Not inverted and out of range.
      //
      // Cases to **not** validate for:
      // • Navigating months.
      // • Not inverted and date enabled.
      // • Inverted and all dates disabled.
      // • ..and anything else.
      if ( !options || !options.nav ) if (
          /* 1 */ ( !isFlippedBase && calendar.disabled( dateObject ) ) ||
          /* 2 */ ( isFlippedBase && calendar.disabled( dateObject ) && ( hasEnabledWeekdays || hasEnabledBeforeTarget || hasEnabledAfterTarget ) ) ||
          /* 3 */ ( !isFlippedBase && (dateObject.pick <= minLimitObject.pick || dateObject.pick >= maxLimitObject.pick) )
      ) {
  
  
          // When inverted, flip the direction if there aren’t any enabled weekdays
          // and there are no enabled dates in the direction of the interval.
          if ( isFlippedBase && !hasEnabledWeekdays && ( ( !hasEnabledAfterTarget && interval > 0 ) || ( !hasEnabledBeforeTarget && interval < 0 ) ) ) {
              interval *= -1
          }
  
  
          // Keep looping until we reach an enabled date.
          while ( /*safety &&*/ calendar.disabled( dateObject ) ) {
  
              /*safety -= 1
              if ( !safety ) {
                  throw 'Fell into an infinite loop while validating ' + dateObject.obj + '.'
              }*/
  
  
              // If we’ve looped into the next/prev month with a large interval, return to the original date and flatten the interval.
              if ( Math.abs( interval ) > 1 && ( dateObject.month < originalDateObject.month || dateObject.month > originalDateObject.month ) ) {
                  dateObject = originalDateObject
                  interval = interval > 0 ? 1 : -1
              }
  
  
              // If we’ve reached the min/max limit, reverse the direction, flatten the interval and set it to the limit.
              if ( dateObject.pick <= minLimitObject.pick ) {
                  reachedMin = true
                  interval = 1
                  dateObject = calendar.create([
                      minLimitObject.year,
                      minLimitObject.month,
                      minLimitObject.date + (dateObject.pick === minLimitObject.pick ? 0 : -1)
                  ])
              }
              else if ( dateObject.pick >= maxLimitObject.pick ) {
                  reachedMax = true
                  interval = -1
                  dateObject = calendar.create([
                      maxLimitObject.year,
                      maxLimitObject.month,
                      maxLimitObject.date + (dateObject.pick === maxLimitObject.pick ? 0 : 1)
                  ])
              }
  
  
              // If we’ve reached both limits, just break out of the loop.
              if ( reachedMin && reachedMax ) {
                  break
              }
  
  
              // Finally, create the shifted date using the interval and keep looping.
              dateObject = calendar.create([ dateObject.year, dateObject.month, dateObject.date + interval ])
          }
  
      } //endif
  
  
      // Return the date object settled on.
      return dateObject
  } //DatePicker.prototype.validate
  
  
  /**
   * Check if a date is disabled.
   */
  DatePicker.prototype.disabled = function( dateToVerify ) {
  
      var
          calendar = this,
  
          // Filter through the disabled dates to check if this is one.
          isDisabledMatch = calendar.item.disable.filter( function( dateToDisable ) {
  
              // If the date is a number, match the weekday with 0index and `firstDay` check.
              if ( _.isInteger( dateToDisable ) ) {
                  return dateToVerify.day === ( calendar.settings.firstDay ? dateToDisable : dateToDisable - 1 ) % 7
              }
  
              // If it’s an array or a native JS date, create and match the exact date.
              if ( $.isArray( dateToDisable ) || _.isDate( dateToDisable ) ) {
                  return dateToVerify.pick === calendar.create( dateToDisable ).pick
              }
  
              // If it’s an object, match a date within the “from” and “to” range.
              if ( $.isPlainObject( dateToDisable ) ) {
                  return calendar.withinRange( dateToDisable, dateToVerify )
              }
          })
  
      // If this date matches a disabled date, confirm it’s not inverted.
      isDisabledMatch = isDisabledMatch.length && !isDisabledMatch.filter(function( dateToDisable ) {
          return $.isArray( dateToDisable ) && dateToDisable[3] == 'inverted' ||
              $.isPlainObject( dateToDisable ) && dateToDisable.inverted
      }).length
  
      // Check the calendar “enabled” flag and respectively flip the
      // disabled state. Then also check if it’s beyond the min/max limits.
      return calendar.item.enable === -1 ? !isDisabledMatch : isDisabledMatch ||
          dateToVerify.pick < calendar.item.min.pick ||
          dateToVerify.pick > calendar.item.max.pick
  
  } //DatePicker.prototype.disabled
  
  
  /**
   * Parse a string into a usable type.
   */
  DatePicker.prototype.parse = function( type, value, options ) {
  
      var calendar = this,
          parsingObject = {}
  
      // If it’s already parsed, we’re good.
      if ( !value || typeof value != 'string' ) {
          return value
      }
  
      // We need a `.format` to parse the value with.
      if ( !( options && options.format ) ) {
          options = options || {}
          options.format = calendar.settings.format
      }
  
      // Convert the format into an array and then map through it.
      calendar.formats.toArray( options.format ).map( function( label ) {
  
          var
              // Grab the formatting label.
              formattingLabel = calendar.formats[ label ],
  
              // The format length is from the formatting label function or the
              // label length without the escaping exclamation (!) mark.
              formatLength = formattingLabel ? _.trigger( formattingLabel, calendar, [ value, parsingObject ] ) : label.replace( /^!/, '' ).length
  
          // If there's a format label, split the value up to the format length.
          // Then add it to the parsing object with appropriate label.
          if ( formattingLabel ) {
              parsingObject[ label ] = value.substr( 0, formatLength )
          }
  
          // Update the value as the substring from format length to end.
          value = value.substr( formatLength )
      })
  
      // Compensate for month 0index.
      return [
          parsingObject.yyyy || parsingObject.yy,
          +( parsingObject.mm || parsingObject.m ) - 1,
          parsingObject.dd || parsingObject.d
      ]
  } //DatePicker.prototype.parse
  
  
  /**
   * Various formats to display the object in.
   */
  DatePicker.prototype.formats = (function() {
  
      // Return the length of the first word in a collection.
      function getWordLengthFromCollection( string, collection, dateObject ) {
  
          // Grab the first word from the string.
          var word = string.match( /\w+/ )[ 0 ]
  
          // If there's no month index, add it to the date object
          if ( !dateObject.mm && !dateObject.m ) {
              dateObject.m = collection.indexOf( word ) + 1
          }
  
          // Return the length of the word.
          return word.length
      }
  
      // Get the length of the first word in a string.
      function getFirstWordLength( string ) {
          return string.match( /\w+/ )[ 0 ].length
      }
  
      return {
  
          d: function( string, dateObject ) {
  
              // If there's string, then get the digits length.
              // Otherwise return the selected date.
              return string ? _.digits( string ) : dateObject.date
          },
          dd: function( string, dateObject ) {
  
              // If there's a string, then the length is always 2.
              // Otherwise return the selected date with a leading zero.
              return string ? 2 : _.lead( dateObject.date )
          },
          ddd: function( string, dateObject ) {
  
              // If there's a string, then get the length of the first word.
              // Otherwise return the short selected weekday.
              return string ? getFirstWordLength( string ) : this.settings.weekdaysShort[ dateObject.day ]
          },
          dddd: function( string, dateObject ) {
  
              // If there's a string, then get the length of the first word.
              // Otherwise return the full selected weekday.
              return string ? getFirstWordLength( string ) : this.settings.weekdaysFull[ dateObject.day ]
          },
          m: function( string, dateObject ) {
  
              // If there's a string, then get the length of the digits
              // Otherwise return the selected month with 0index compensation.
              return string ? _.digits( string ) : dateObject.month + 1
          },
          mm: function( string, dateObject ) {
  
              // If there's a string, then the length is always 2.
              // Otherwise return the selected month with 0index and leading zero.
              return string ? 2 : _.lead( dateObject.month + 1 )
          },
          mmm: function( string, dateObject ) {
  
              var collection = this.settings.monthsShort
  
              // If there's a string, get length of the relevant month from the short
              // months collection. Otherwise return the selected month from that collection.
              return string ? getWordLengthFromCollection( string, collection, dateObject ) : collection[ dateObject.month ]
          },
          mmmm: function( string, dateObject ) {
  
              var collection = this.settings.monthsFull
  
              // If there's a string, get length of the relevant month from the full
              // months collection. Otherwise return the selected month from that collection.
              return string ? getWordLengthFromCollection( string, collection, dateObject ) : collection[ dateObject.month ]
          },
          yy: function( string, dateObject ) {
  
              // If there's a string, then the length is always 2.
              // Otherwise return the selected year by slicing out the first 2 digits.
              return string ? 2 : ( '' + dateObject.year ).slice( 2 )
          },
          yyyy: function( string, dateObject ) {
  
              // If there's a string, then the length is always 4.
              // Otherwise return the selected year.
              return string ? 4 : dateObject.year
          },
  
          // Create an array by splitting the formatting string passed.
          toArray: function( formatString ) { return formatString.split( /(d{1,4}|m{1,4}|y{4}|yy|!.)/g ) },
  
          // Format an object into a string using the formatting options.
          toString: function ( formatString, itemObject ) {
              var calendar = this
              return calendar.formats.toArray( formatString ).map( function( label ) {
                  return _.trigger( calendar.formats[ label ], calendar, [ 0, itemObject ] ) || label.replace( /^!/, '' )
              }).join( '' )
          }
      }
  })() //DatePicker.prototype.formats
  
  
  
  
  /**
   * Check if two date units are the exact.
   */
  DatePicker.prototype.isDateExact = function( one, two ) {
  
      var calendar = this
  
      // When we’re working with weekdays, do a direct comparison.
      if (
          ( _.isInteger( one ) && _.isInteger( two ) ) ||
          ( typeof one == 'boolean' && typeof two == 'boolean' )
       ) {
          return one === two
      }
  
      // When we’re working with date representations, compare the “pick” value.
      if (
          ( _.isDate( one ) || $.isArray( one ) ) &&
          ( _.isDate( two ) || $.isArray( two ) )
      ) {
          return calendar.create( one ).pick === calendar.create( two ).pick
      }
  
      // When we’re working with range objects, compare the “from” and “to”.
      if ( $.isPlainObject( one ) && $.isPlainObject( two ) ) {
          return calendar.isDateExact( one.from, two.from ) && calendar.isDateExact( one.to, two.to )
      }
  
      return false
  }
  
  
  /**
   * Check if two date units overlap.
   */
  DatePicker.prototype.isDateOverlap = function( one, two ) {
  
      var calendar = this,
          firstDay = calendar.settings.firstDay ? 1 : 0
  
      // When we’re working with a weekday index, compare the days.
      if ( _.isInteger( one ) && ( _.isDate( two ) || $.isArray( two ) ) ) {
          one = one % 7 + firstDay
          return one === calendar.create( two ).day + 1
      }
      if ( _.isInteger( two ) && ( _.isDate( one ) || $.isArray( one ) ) ) {
          two = two % 7 + firstDay
          return two === calendar.create( one ).day + 1
      }
  
      // When we’re working with range objects, check if the ranges overlap.
      if ( $.isPlainObject( one ) && $.isPlainObject( two ) ) {
          return calendar.overlapRanges( one, two )
      }
  
      return false
  }
  
  
  /**
   * Flip the “enabled” state.
   */
  DatePicker.prototype.flipEnable = function(val) {
      var itemObject = this.item
      itemObject.enable = val || (itemObject.enable == -1 ? 1 : -1)
  }
  
  
  /**
   * Mark a collection of dates as “disabled”.
   */
  DatePicker.prototype.deactivate = function( type, datesToDisable ) {
  
      var calendar = this,
          disabledItems = calendar.item.disable.slice(0)
  
  
      // If we’re flipping, that’s all we need to do.
      if ( datesToDisable == 'flip' ) {
          calendar.flipEnable()
      }
  
      else if ( datesToDisable === false ) {
          calendar.flipEnable(1)
          disabledItems = []
      }
  
      else if ( datesToDisable === true ) {
          calendar.flipEnable(-1)
          disabledItems = []
      }
  
      // Otherwise go through the dates to disable.
      else {
  
          datesToDisable.map(function( unitToDisable ) {
  
              var matchFound
  
              // When we have disabled items, check for matches.
              // If something is matched, immediately break out.
              for ( var index = 0; index < disabledItems.length; index += 1 ) {
                  if ( calendar.isDateExact( unitToDisable, disabledItems[index] ) ) {
                      matchFound = true
                      break
                  }
              }
  
              // If nothing was found, add the validated unit to the collection.
              if ( !matchFound ) {
                  if (
                      _.isInteger( unitToDisable ) ||
                      _.isDate( unitToDisable ) ||
                      $.isArray( unitToDisable ) ||
                      ( $.isPlainObject( unitToDisable ) && unitToDisable.from && unitToDisable.to )
                  ) {
                      disabledItems.push( unitToDisable )
                  }
              }
          })
      }
  
      // Return the updated collection.
      return disabledItems
  } //DatePicker.prototype.deactivate
  
  
  /**
   * Mark a collection of dates as “enabled”.
   */
  DatePicker.prototype.activate = function( type, datesToEnable ) {
  
      var calendar = this,
          disabledItems = calendar.item.disable,
          disabledItemsCount = disabledItems.length
  
      // If we’re flipping, that’s all we need to do.
      if ( datesToEnable == 'flip' ) {
          calendar.flipEnable()
      }
  
      else if ( datesToEnable === true ) {
          calendar.flipEnable(1)
          disabledItems = []
      }
  
      else if ( datesToEnable === false ) {
          calendar.flipEnable(-1)
          disabledItems = []
      }
  
      // Otherwise go through the disabled dates.
      else {
  
          datesToEnable.map(function( unitToEnable ) {
  
              var matchFound,
                  disabledUnit,
                  index,
                  isExactRange
  
              // Go through the disabled items and try to find a match.
              for ( index = 0; index < disabledItemsCount; index += 1 ) {
  
                  disabledUnit = disabledItems[index]
  
                  // When an exact match is found, remove it from the collection.
                  if ( calendar.isDateExact( disabledUnit, unitToEnable ) ) {
                      matchFound = disabledItems[index] = null
                      isExactRange = true
                      break
                  }
  
                  // When an overlapped match is found, add the “inverted” state to it.
                  else if ( calendar.isDateOverlap( disabledUnit, unitToEnable ) ) {
                      if ( $.isPlainObject( unitToEnable ) ) {
                          unitToEnable.inverted = true
                          matchFound = unitToEnable
                      }
                      else if ( $.isArray( unitToEnable ) ) {
                          matchFound = unitToEnable
                          if ( !matchFound[3] ) matchFound.push( 'inverted' )
                      }
                      else if ( _.isDate( unitToEnable ) ) {
                          matchFound = [ unitToEnable.getUTCFullYear(), unitToEnable.getUTCMonth(), unitToEnable.getUTCDate(), 'inverted' ]
                      }
                      break
                  }
              }
  
              // If a match was found, remove a previous duplicate entry.
              if ( matchFound ) for ( index = 0; index < disabledItemsCount; index += 1 ) {
                  if ( calendar.isDateExact( disabledItems[index], unitToEnable ) ) {
                      disabledItems[index] = null
                      break
                  }
              }
  
              // In the event that we’re dealing with an exact range of dates,
              // make sure there are no “inverted” dates because of it.
              if ( isExactRange ) for ( index = 0; index < disabledItemsCount; index += 1 ) {
                  if ( calendar.isDateOverlap( disabledItems[index], unitToEnable ) ) {
                      disabledItems[index] = null
                      break
                  }
              }
  
              // If something is still matched, add it into the collection.
              if ( matchFound ) {
                  disabledItems.push( matchFound )
              }
          })
      }
  
      // Return the updated collection.
      return disabledItems.filter(function( val ) { return val != null })
  } //DatePicker.prototype.activate
  
  
  /**
   * Create a string for the nodes in the picker.
   */
  DatePicker.prototype.nodes = function( isOpen ) {
  
      var
          calendar = this,
          settings = calendar.settings,
          calendarItem = calendar.item,
          nowObject = calendarItem.now,
          selectedObject = calendarItem.select,
          highlightedObject = calendarItem.highlight,
          viewsetObject = calendarItem.view,
          disabledCollection = calendarItem.disable,
          minLimitObject = calendarItem.min,
          maxLimitObject = calendarItem.max,
  
  
          // Create the calendar table head using a copy of weekday labels collection.
          // * We do a copy so we don't mutate the original array.
          tableHead = (function( collection, fullCollection ) {
  
              // If the first day should be Monday, move Sunday to the end.
              if ( settings.firstDay ) {
                  collection.push( collection.shift() )
                  fullCollection.push( fullCollection.shift() )
              }
  
              // Create and return the table head group.
              return _.node(
                  'thead',
                  _.node(
                      'tr',
                      _.group({
                          min: 0,
                          max: DAYS_IN_WEEK - 1,
                          i: 1,
                          node: 'th',
                          item: function( counter ) {
                              return [
                                  collection[ counter ],
                                  settings.klass.weekdays,
                                  'scope=col title="' + fullCollection[ counter ] + '"'
                              ]
                          }
                      })
                  )
              ) //endreturn
          })( ( settings.showWeekdaysFull ? settings.weekdaysFull : settings.weekdaysShort ).slice( 0 ), settings.weekdaysFull.slice( 0 ) ), //tableHead
  
  
          // Create the nav for next/prev month.
          createMonthNav = function( next ) {
  
              // Otherwise, return the created month tag.
              return _.node(
                  'div',
                  ' ',
                  settings.klass[ 'nav' + ( next ? 'Next' : 'Prev' ) ] + (
  
                      // If the focused month is outside the range, disabled the button.
                      ( next && viewsetObject.year >= maxLimitObject.year && viewsetObject.month >= maxLimitObject.month ) ||
                      ( !next && viewsetObject.year <= minLimitObject.year && viewsetObject.month <= minLimitObject.month ) ?
                      ' ' + settings.klass.navDisabled : ''
                  ),
                  'data-nav=' + ( next || -1 ) + ' ' +
                  _.ariaAttr({
                      role: 'button',
                      controls: calendar.$node[0].id + '_table'
                  }) + ' ' +
                  'title="' + (next ? settings.labelMonthNext : settings.labelMonthPrev ) + '"'
              ) //endreturn
          }, //createMonthNav
  
  
          // Create the month label.
          createMonthLabel = function() {
  
              var monthsCollection = settings.showMonthsShort ? settings.monthsShort : settings.monthsFull
  
              // If there are months to select, add a dropdown menu.
              if ( settings.selectMonths ) {
  
                  return _.node( 'select',
                      _.group({
                          min: 0,
                          max: 11,
                          i: 1,
                          node: 'option',
                          item: function( loopedMonth ) {
  
                              return [
  
                                  // The looped month and no classes.
                                  monthsCollection[ loopedMonth ], 0,
  
                                  // Set the value and selected index.
                                  'value=' + loopedMonth +
                                  ( viewsetObject.month == loopedMonth ? ' selected' : '' ) +
                                  (
                                      (
                                          ( viewsetObject.year == minLimitObject.year && loopedMonth < minLimitObject.month ) ||
                                          ( viewsetObject.year == maxLimitObject.year && loopedMonth > maxLimitObject.month )
                                      ) ?
                                      ' disabled' : ''
                                  )
                              ]
                          }
                      }),
                      settings.klass.selectMonth,
                      ( isOpen ? '' : 'disabled' ) + ' ' +
                      _.ariaAttr({ controls: calendar.$node[0].id + '_table' }) + ' ' +
                      'title="' + settings.labelMonthSelect + '"'
                  )
              }
  
              // If there's a need for a month selector
              return _.node( 'div', monthsCollection[ viewsetObject.month ], settings.klass.month )
          }, //createMonthLabel
  
  
          // Create the year label.
          createYearLabel = function() {
  
              var focusedYear = viewsetObject.year,
  
              // If years selector is set to a literal "true", set it to 5. Otherwise
              // divide in half to get half before and half after focused year.
              numberYears = settings.selectYears === true ? 5 : ~~( settings.selectYears / 2 )
  
              // If there are years to select, add a dropdown menu.
              if ( numberYears ) {
  
                  var
                      minYear = minLimitObject.year,
                      maxYear = maxLimitObject.year,
                      lowestYear = focusedYear - numberYears,
                      highestYear = focusedYear + numberYears
  
                  // If the min year is greater than the lowest year, increase the highest year
                  // by the difference and set the lowest year to the min year.
                  if ( minYear > lowestYear ) {
                      highestYear += minYear - lowestYear
                      lowestYear = minYear
                  }
  
                  // If the max year is less than the highest year, decrease the lowest year
                  // by the lower of the two: available and needed years. Then set the
                  // highest year to the max year.
                  if ( maxYear < highestYear ) {
  
                      var availableYears = lowestYear - minYear,
                          neededYears = highestYear - maxYear
  
                      lowestYear -= availableYears > neededYears ? neededYears : availableYears
                      highestYear = maxYear
                  }
  
                  return _.node( 'select',
                      _.group({
                          min: lowestYear,
                          max: highestYear,
                          i: 1,
                          node: 'option',
                          item: function( loopedYear ) {
                              return [
  
                                  // The looped year and no classes.
                                  loopedYear, 0,
  
                                  // Set the value and selected index.
                                  'value=' + loopedYear + ( focusedYear == loopedYear ? ' selected' : '' )
                              ]
                          }
                      }),
                      settings.klass.selectYear,
                      ( isOpen ? '' : 'disabled' ) + ' ' + _.ariaAttr({ controls: calendar.$node[0].id + '_table' }) + ' ' +
                      'title="' + settings.labelYearSelect + '"'
                  )
              }
  
              // Otherwise just return the year focused
              return _.node( 'div', focusedYear, settings.klass.year )
          } //createYearLabel
  
  
      // Create and return the entire calendar.
      return _.node(
          'div',
          ( settings.selectYears ? createYearLabel() + createMonthLabel() : createMonthLabel() + createYearLabel() ) +
          createMonthNav() + createMonthNav( 1 ),
          settings.klass.header
      ) + _.node(
          'table',
          tableHead +
          _.node(
              'tbody',
              _.group({
                  min: 0,
                  max: WEEKS_IN_CALENDAR - 1,
                  i: 1,
                  node: 'tr',
                  item: function( rowCounter ) {
  
                      // If Monday is the first day and the month starts on Sunday, shift the date back a week.
                      var shiftDateBy = settings.firstDay && calendar.create([ viewsetObject.year, viewsetObject.month, 1 ]).day === 0 ? -7 : 0
  
                      return [
                          _.group({
                              min: DAYS_IN_WEEK * rowCounter - viewsetObject.day + shiftDateBy + 1, // Add 1 for weekday 0index
                              max: function() {
                                  return this.min + DAYS_IN_WEEK - 1
                              },
                              i: 1,
                              node: 'td',
                              item: function( targetDate ) {
  
                                  // Convert the time date from a relative date to a target date.
                                  targetDate = calendar.create([ viewsetObject.year, viewsetObject.month, targetDate + ( settings.firstDay ? 1 : 0 ) ])
  
                                  var isSelected = selectedObject && selectedObject.pick == targetDate.pick,
                                      isHighlighted = highlightedObject && highlightedObject.pick == targetDate.pick,
                                      isDisabled = disabledCollection && calendar.disabled( targetDate ) || targetDate.pick < minLimitObject.pick || targetDate.pick > maxLimitObject.pick
  
                                  return [
                                      _.node(
                                          'div',
                                          targetDate.date,
                                          (function( klasses ) {
  
                                              // Add the `infocus` or `outfocus` classes based on month in view.
                                              klasses.push( viewsetObject.month == targetDate.month ? settings.klass.infocus : settings.klass.outfocus )
  
                                              // Add the `today` class if needed.
                                              if ( nowObject.pick == targetDate.pick ) {
                                                  klasses.push( settings.klass.now )
                                              }
  
                                              // Add the `selected` class if something's selected and the time matches.
                                              if ( isSelected ) {
                                                  klasses.push( settings.klass.selected )
                                              }
  
                                              // Add the `highlighted` class if something's highlighted and the time matches.
                                              if ( isHighlighted ) {
                                                  klasses.push( settings.klass.highlighted )
                                              }
  
                                              // Add the `disabled` class if something's disabled and the object matches.
                                              if ( isDisabled ) {
                                                  klasses.push( settings.klass.disabled )
                                              }
  
                                              return klasses.join( ' ' )
                                          })([ settings.klass.day ]),
                                          'data-pick=' + targetDate.pick + ' ' + _.ariaAttr({
                                              role: 'gridcell',
                                              selected: isSelected && calendar.$node.val() === _.trigger(
                                                      calendar.formats.toString,
                                                      calendar,
                                                      [ settings.format, targetDate ]
                                                  ) ? true : null,
                                              activedescendant: isHighlighted ? true : null,
                                              disabled: isDisabled ? true : null
                                          })
                                      ),
                                      '',
                                      _.ariaAttr({ role: 'presentation' })
                                  ] //endreturn
                              }
                          })
                      ] //endreturn
                  }
              })
          ),
          settings.klass.table,
          'id="' + calendar.$node[0].id + '_table' + '" ' + _.ariaAttr({
              role: 'grid',
              controls: calendar.$node[0].id,
              readonly: true
          })
      ) +
  
      // * For Firefox forms to submit, make sure to set the buttons’ `type` attributes as “button”.
      _.node(
          'div',
          _.node( 'button', settings.today, settings.klass.buttonToday,
              'type=button data-pick=' + nowObject.pick +
              ( isOpen && !calendar.disabled(nowObject) ? '' : ' disabled' ) + ' ' +
              _.ariaAttr({ controls: calendar.$node[0].id }) ) +
          _.node( 'button', settings.clear, settings.klass.buttonClear,
              'type=button data-clear=1' +
              ( isOpen ? '' : ' disabled' ) + ' ' +
              _.ariaAttr({ controls: calendar.$node[0].id }) ) +
          _.node('button', settings.close, settings.klass.buttonClose,
              'type=button data-close=true ' +
              ( isOpen ? '' : ' disabled' ) + ' ' +
              _.ariaAttr({ controls: calendar.$node[0].id }) ),
          settings.klass.footer
      ) //endreturn
  } //DatePicker.prototype.nodes
  
  
  
  
  /**
   * The date picker defaults.
   */
  DatePicker.defaults = (function( prefix ) {
  
      return {
  
          // The title label to use for the month nav buttons
          labelMonthNext: 'Next month',
          labelMonthPrev: 'Previous month',
  
          // The title label to use for the dropdown selectors
          labelMonthSelect: 'Select a month',
          labelYearSelect: 'Select a year',
  
          // Months and weekdays
          monthsFull: [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ],
          monthsShort: [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ],
          weekdaysFull: [ 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' ],
          weekdaysShort: [ 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat' ],
  
          // Today and clear
          today: 'Today',
          clear: 'Clear',
          close: 'Close',
  
          // The format to show on the `input` element
          format: 'd mmmm, yyyy',
  
          // Classes
          klass: {
  
              table: prefix + 'table',
  
              header: prefix + 'header',
  
              navPrev: prefix + 'nav--prev',
              navNext: prefix + 'nav--next',
              navDisabled: prefix + 'nav--disabled',
  
              month: prefix + 'month',
              year: prefix + 'year',
  
              selectMonth: prefix + 'select--month',
              selectYear: prefix + 'select--year',
  
              weekdays: prefix + 'weekday',
  
              day: prefix + 'day',
              disabled: prefix + 'day--disabled',
              selected: prefix + 'day--selected',
              highlighted: prefix + 'day--highlighted',
              now: prefix + 'day--today',
              infocus: prefix + 'day--infocus',
              outfocus: prefix + 'day--outfocus',
  
              footer: prefix + 'footer',
  
              buttonClear: prefix + 'button--clear',
              buttonToday: prefix + 'button--today',
              buttonClose: prefix + 'button--close'
          }
      }
  })( Picker.klasses().picker + '__' )
  
  
  
  
  
  /**
   * Extend the picker to add the date picker.
   */
  Picker.extend( 'pickadate', DatePicker )
  
  
  }));
  
  
  
  