Date logic for cashflows

I have 3 dates: Present date:11/14/2018, Start of lease date: 11/8/2014 and End of lease date
and the remaining payments which is 10 payments from Present date.

Present date is always today's date. Start of lease can be anything but I am working on if the start of lease was in the past.

Based on this i have the following cash flow:

enter image description here

Since the lease started on the 8th, the payments will be on 8th of every month.
I have the following code that parses number of days depending on when the start date is.

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

The issue here is that I need the end date to be calculated from today's date however end 1 day before the start of lease date. In this case it parses 10 payments and the end date is on 9/13/2019.

But, it should be on 10/8/2019. Any help is appreciated. Thank you.

asked Nov 14 '18 at 19:11

ace23

5811

Using a date library like moment.js would help you simplify the logic for something like this

– charlietfl
Nov 14 '18 at 19:15

add a comment |

I have 3 dates: Present date:11/14/2018, Start of lease date: 11/8/2014 and End of lease date
and the remaining payments which is 10 payments from Present date.

Present date is always today's date. Start of lease can be anything but I am working on if the start of lease was in the past.

Based on this i have the following cash flow:

enter image description here

Since the lease started on the 8th, the payments will be on 8th of every month.
I have the following code that parses number of days depending on when the start date is.

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

But, it should be on 10/8/2019. Any help is appreciated. Thank you.

asked Nov 14 '18 at 19:11

ace23

5811

Using a date library like moment.js would help you simplify the logic for something like this

– charlietfl
Nov 14 '18 at 19:15

add a comment |

I have 3 dates: Present date:11/14/2018, Start of lease date: 11/8/2014 and End of lease date
and the remaining payments which is 10 payments from Present date.

Present date is always today's date. Start of lease can be anything but I am working on if the start of lease was in the past.

Based on this i have the following cash flow:

enter image description here

Since the lease started on the 8th, the payments will be on 8th of every month.
I have the following code that parses number of days depending on when the start date is.

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

But, it should be on 10/8/2019. Any help is appreciated. Thank you.

asked Nov 14 '18 at 19:11

ace23

5811

I have 3 dates: Present date:11/14/2018, Start of lease date: 11/8/2014 and End of lease date
and the remaining payments which is 10 payments from Present date.

Present date is always today's date. Start of lease can be anything but I am working on if the start of lease was in the past.

Based on this i have the following cash flow:

enter image description here

Since the lease started on the 8th, the payments will be on 8th of every month.
I have the following code that parses number of days depending on when the start date is.

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

But, it should be on 10/8/2019. Any help is appreciated. Thank you.

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

    function isLeapYear(year) {

        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));

    }

    function getDaysInMonth(year, month) {

        return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];

    }

     function getCurrentDay(date) {

        var dateOfToday;

        if(date && date != "")

            dateOfToday = new Date(date);

        else dateOfToday = new Date();



        var dd = ("0" + (dateOfToday.getDate())).slice(-2);

        var mm = ("0" + (dateOfToday.getMonth() + 1)).slice(-2);

        var yyyy = dateOfToday.getFullYear();



        dateOfToday = yyyy + '-' + mm + '-' + dd;

        return dateOfToday;

    }

function PopulateEndDate() {

        var d2;

        var paymentDays;

        var stDate;

        var pDate;

    

        if (document.getElementById("startDate"))

            stDate = document.getElementById("startDate").value;

        if (document.getElementById("presentDate"))

            pDate = document.getElementById("presentDate").value;

            

        var futureSDate =  (pDate < stDate); //future start date

        var pastSDate = (pDate > stDate); //start date was in the past

        var sameDates = (pDate == stDate);

        

        if (stDate && futureSDate)

            d2 = new Date(stDate);

        else if (stDate && sameDates)

            d2 = new Date(stDate);

        else if (stDate && pastSDate)

            d2 = new Date(pDate);

        else

            d2 = new Date(pDate);

            

        var dd = d2.getDate()+1000;

        var mm = d2.getMonth()+1;

        var yyyy = d2.getFullYear();

        var today = (mm+'/'+dd+'/'+yyyy);



     

        paymentDays = document.getElementById("paymentRemaining").value;

            

        if (paymentDays)

        var n = d2.getDate();

        d2.setDate(1);

        d2.setMonth(d2.getMonth() + parseInt(paymentDays));

        d2.setDate(Math.min(n, getDaysInMonth(d2.getFullYear(), d2.getMonth())));

        if (document.getElementById("endDate"))

            document.getElementById("endDate").value = getCurrentDay(d2);

    }

<label>Start of Lease </label> <input  id="startDate"  onchange="PopulateEndDate()" type="date" ><br/><br/>

<label>Present date </label> <input  id="presentDate" onchange="PopulateEndDate()"  type="date" ><br/><br/>

<label>Remaining Payments</label> <input id="paymentRemaining" name = "paymentRemaining" type="number" class="label1" style="text-align: right; width:80px;"> <br/><br/>

<label>End of Lease </label> <input  id="endDate"  onchange="PopulateEndDate()" type="date" ><br/><br/><br/>

javascript

asked Nov 14 '18 at 19:11

ace23

5811

asked Nov 14 '18 at 19:11

ace23

5811

asked Nov 14 '18 at 19:11

ace23

5811

asked Nov 14 '18 at 19:11

ace23

5811

asked Nov 14 '18 at 19:11

ace23

5811

Using a date library like moment.js would help you simplify the logic for something like this

– charlietfl
Nov 14 '18 at 19:15

add a comment |

Using a date library like moment.js would help you simplify the logic for something like this

– charlietfl
Nov 14 '18 at 19:15

Using a date library like moment.js would help you simplify the logic for something like this

– charlietfl
Nov 14 '18 at 19:15

add a comment |

0

active

oldest

votes

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53307230%2fdate-logic-for-cashflows%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

0

active

oldest

votes

0

active

oldest

votes

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Vfrdtyky