function giveUtc(start) {
var t = moment().format("YYYY-MM-DD")
var t1 = t + " " + start
return moment(t1, "YYYY-MM-DD h:mm A").format()
}
const timeRange = [{
'start': '9:00 AM',
'end': '10:00 AM'
},
{
'start': '12:00 PM',
'end': '2:00 PM'
},
{
'start': '5:00 PM',
'end': '7:00 PM'
},
{
"start": "11:00 AM",
"end": "3:00 PM",
},
{
"start": "6:00 PM",
"end": "9:00 PM",
}]
timeRange.sort((a, b) => {
var utcA = giveUtc(a.start)
var utcB = giveUtc(b.start)
if (utcA < utcB) {
return -1
}
if (utcA > utcB) {
return 1
}
return 0
})
const availableTimeArray = []
let endTimeFarthest = moment(giveUtc("0.00 AM"))
let startTimeMinimum = moment(giveUtc("12.59 PM"))
timeRange.forEach((element, index) => {
let currentEndTime = moment(giveUtc(element.end))
const currentStartTime = moment(giveUtc(element.start))
if (currentStartTime.isBefore(startTimeMinimum)) {
startTimeMinimum = currentStartTime
}
if (currentEndTime.isAfter(endTimeFarthest)) {
endTimeFarthest = currentEndTime
}
/* console.log(startTimeMinimum.format("h:mm A"), endTimeFarthest.format("h:mm A")) */
if (index === timeRange.length - 1) {
if (timeRange.length === 1) {
availableTimeArray.push({
start: "00:00 AM",
end: currentStartTime.format("h:mm A")
})
}
availableTimeArray.push({
//start: currentEndTime.format("h:mm A"),
start: endTimeFarthest.format("h:mm A"),
end: "11.59 PM"
})
} else {
const nextBusyTime = timeRange[index + 1]
const nextStartTime = moment(giveUtc(nextBusyTime.start))
if (index === 0) {
availableTimeArray.push({
start: "00:00 AM",
end: currentStartTime.format("h:mm A")
})
}
let endTimeToCompare = currentEndTime.isBefore(endTimeFarthest) ?
endTimeFarthest :
currentEndTime
if (endTimeToCompare.isBefore(nextStartTime)) {
availableTimeArray.push({
start: endTimeToCompare.format("h:mm A"),
end: nextStartTime.format("h:mm A")
})
}
}
})
console.log(availableTimeArray)
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.5.1/moment.min.js"></script>
