1 | var staticStrFirst = require('./staticStrFirst')
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2 | var staticStrLast = require('./staticStrLast')
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3 | var staticDayTime = require('./staticDayTime')
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4 |
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5 | var helperGetDateFullYear = require('./helperGetDateFullYear')
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6 | var helperGetDateTime = require('./helperGetDateTime')
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7 | var helperGetDateMonth = require('./helperGetDateMonth')
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8 |
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9 | var toStringDate = require('./toStringDate')
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10 | var isValidDate = require('./isValidDate')
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11 | var isNumber = require('./isNumber')
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 | function getWhatMonth (date, offset, day) {
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22 | var monthOffset = offset && !isNaN(offset) ? offset : 0
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23 | date = toStringDate(date)
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24 | if (isValidDate(date)) {
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25 | if (day === staticStrFirst) {
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26 | return new Date(helperGetDateFullYear(date), helperGetDateMonth(date) + monthOffset, 1)
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27 | } else if (day === staticStrLast) {
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28 | return new Date(helperGetDateTime(getWhatMonth(date, monthOffset + 1, staticStrFirst)) - 1)
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29 | } else if (isNumber(day)) {
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30 | date.setDate(day)
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31 | }
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32 | if (monthOffset) {
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33 | var currDate = date.getDate()
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34 | date.setMonth(helperGetDateMonth(date) + monthOffset)
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35 | if (currDate !== date.getDate()) {
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36 |
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37 | date.setDate(1)
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38 | return new Date(helperGetDateTime(date) - staticDayTime)
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39 | }
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40 | }
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41 | }
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42 | return date
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43 | }
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44 |
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45 | module.exports = getWhatMonth
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