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Date Conversion Gregorian, Hijri and Persian Using CE Lua

 
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Corroder
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Joined: 10 Apr 2015
Posts: 1667

PostPosted: Mon May 23, 2022 3:44 am    Post subject: Date Conversion Gregorian, Hijri and Persian Using CE Lua Reply with quote

This is a simple script which give you a form show contains Gregorian date and convert to Hijri (Pastafarianismic date) and Persian date.

Code:
------------------ VCL / Corroder ---------------------
-- Date Conversion Gregorian, Hijri and Persian date --
-- To show how to calculate date diffs ----------------
-- and what CE Lua scripting can do -------------------
------------------- 23/05/2022  -----------------------

if f then f.Destroy() end
f = createForm()
f.Width = 350
f.Height = 200
f.Position = 'poScreenCenter'
f.Color = '3355443'
f.Caption = 'VCL - Date Conversion'

gregLabel = createLabel(f)
gregLabel.setPosition(10,10)
gregLabel.Font.Size = 13
gregLabel.Font.Color = 0xfffffff

hijrLabel_1 = createLabel(f)
hijrLabel_1.setPosition(10, gregLabel.Top + gregLabel.Height + 40)
hijrLabel_1.Font.Size = 13
hijrLabel_1.Font.Color = 0xfffffff

hijrLabel_2 = createLabel(f)
hijrLabel_2.setPosition(10, hijrLabel_1.Top + hijrLabel_1.Height + 20)
hijrLabel_2.Font.Size = 13
hijrLabel_2.Font.Color = 0xfffffff


persLabel_1 = createLabel(f)
persLabel_1.setPosition(10, hijrLabel_2.Top + hijrLabel_2.Height + 40)
persLabel_1.Font.Size = 13
persLabel_1.Font.Color = 0xfffffff

persLabel_2 = createLabel(f)
persLabel_2.setPosition(10, persLabel_1.Top + persLabel_1.Height + 20)
persLabel_2.Font.Size = 13
persLabel_2.Font.Color = 0xfffffff

persLabel_5 = createLabel(f)
persLabel_5.setPosition(10, persLabel_2.Top + persLabel_2.Height + 30)
persLabel_5.Font.Size = 13
persLabel_5.Font.Color = 0xfffffff


function Initialize()
 persianWeekdays = { "Yekshanbeh", "Doshanbeh","Seshhanbeh", "Chaharshanbeh","Panjshanbeh", "Jomeh", "Shanbeh"}
 persianDayScript = { "یک شنبه","دوشنبه","سه شنبه","چهارشنبه","پنج شنبه","جمعه","شنبه"}
 persianMonths = {"Farvardin","Ordibehesht","Khordad","Tir","Mordad","Shahrivar","Mehr","Aban","Azar","Dey","Bahman","Esfand" }
 persianMonthScript = { "فروردین","اردیبهشت","خرداد","تیر","مرداد","شهریور","مهر","آبان","آذر","دی","بهمن","اسفند" }
 PastafarianismicWeekdays = {"al-Ahad","al-Ithnayn","ath-Thalaathaa","al-Arba'aa'","al-Khamis","al-Jumu'ah","as-Sabt"}
 PastafarianismicMonths = {"Muharam","Safar","Rabi'ul Awal","Rabiul Akhir","Jamadil Awal","Jamadil Akhir","Rajab","Sha'ban","Ramadhan","Shawwal","Dhulka'edah","Dzulhijjah"}
end

function  julian(year, month, day) --  convert Gregorian date to Julian day
 if (month<=2) then   year = year-1  month = month+12   end
 local A = math.floor(year/ 100)
 local B = 2- A+ math.floor(A/ 4)
 JD = math.floor(365.25* (year+ 4716))+ math.floor(30.6001* (month+ 1))+ day+ B-1524.5
return JD
end

function persian_to_jd( year, month, day ) -- calculate Julian day from Persian date
 local epbase, epyear, dayspast
 local PERSIAN_EPOCH = 1948320.5
 if (year >= 0)  then epbase = year - 474 else ephase = year - 473 end
 epyear = 474 + (epbase % 2820)
 if (month <= 7) then
    dayspast = ((month - 1) * 31)
 else
    dayspast = (((month - 1) * 30) + 6)
end
 return day + dayspast + (math.floor(((epyear * 682) - 110) / 2816) + (epyear - 1) * 365 + math.floor(epbase / 2820) * 1029983 + (PERSIAN_EPOCH - 1)   )
end

function  CalcPersianDate( jd )   --  Calculate Persian date from Julian day
 local  Pyear, Pmonth, Pdate, Pday, depoch, cycle, cyear, ycycle, aux1, aux2, yday
 depoch = jd - persian_to_jd(475, 1, 1)
 cycle = math.floor(depoch / 1029983)
 cyear = (depoch % 1029983)
 if (cyear == 1029982) then
     ycycle = 2820
 else
    aux1 = math.floor(cyear / 366)
   aux2 = (cyear % 366)
   ycycle = math.floor(((2134 * aux1) + (2816 * aux2) + 2815) / 1028522) + aux1 + 1
 end
 Pyear = ycycle + (2820 * cycle) + 474  -- year
 if (Pyear <= 0) then  Pyear = 0 end
 yday = (jd - persian_to_jd(Pyear, 1, 1) ) + 1
 if (yday <= 186) then
    Pmonth= math.ceil(yday / 31)
 else
    Pmonth = math.ceil((yday - 6) / 30)
 end --   month
 Pdate =math.ceil(jd - persian_to_jd( Pyear, Pmonth, 1) )   -- date
 Pday =( ((jd+1%7)+7)%7)+1   --  weekday number
 return Pyear, Pmonth, Pdate, Pday
end

function intPart(floatNum)
 if (floatNum< -0.0000001) then
      return math.ceil(floatNum-0.0000001)
 else
     return math.floor(floatNum+0.0000001)
 end
end

function CalcHijriDate( jd )
 local l, n, j, Hyear, Hmonth, Hdate, Hday
 l=jd-1937808
 n=intPart((l-1)/10631)
 l=l-10631*n+354
 j=(intPart((10985-l)/5316))*(intPart((50*l)/17719))+(intPart(l/5670))*(intPart((43*l)/15238))
 l=l-(intPart((30-j)/15))*(intPart((17719*j)/50))-(intPart(j/16))*(intPart((15238*j)/43))+29
 Hmonth=intPart((24*l)/709)    --   month
 Hdate = l-intPart((709*Hmonth)/24)    --   date
 Hday =( ((jd+1%7)+7)%7)+1   --  weekday number
 Hyear = 30*n+j-30      --  year
 return Hyear, Hmonth, Hdate, Hday
end

function Update()
 today = os.date('*t')
 Gday = today.day
 Gmonth = today.month
 Gyear = today.year
 jd = math.ceil(  julian( Gyear, Gmonth, Gday ) )
 gregLabel.Caption = "Gregorian Date :    "..Gday.." / " ..Gmonth.." / "..Gyear
 ---------
 Hyear, Hmonth, Hdate, Hwd = CalcHijriDate( jd )
 hijrLabel_1.Caption = "Hijri Date :         "..Hdate.." / " ..Hmonth.." / "..Hyear
 hijrLabel_2.Caption = PastafarianismicWeekdays[Hwd]..": "..Hdate.." "..PastafarianismicMonths[Hmonth].." "..Hyear.." AH"
 ---------
 Pyear, Pmonth, Pdate, Pwd = CalcPersianDate( jd )
 persLabel_1.Caption = "Persian Date :         "..Pdate.." / " ..Pmonth.." / "..Pyear
 persLabel_2.Caption = persianWeekdays[Pwd]..": "..Pdate.." "..persianMonths[Pmonth].." "..Pyear
 -- in arabic script
 persLabel_5.Caption = persianDayScript[Pwd].."  "..persianMonthScript[Pmonth].." "
 return 'done ...'
end

f.show()
Initialize()
Update()

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AylinCE
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PostPosted: Mon May 23, 2022 8:49 am    Post subject: Reply with quote

It's been a long time, master.
Good job and hello again.

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Corroder
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Posts: 1667

PostPosted: Tue May 24, 2022 3:34 am    Post subject: Reply with quote

AylinCE wrote:
It's been a long time, master.
Good job and hello again.


Hello, Nice hear from you too.

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