local p = {}
local getArgs = require('Module:Arguments').getArgs
local timestamp = require('Module:Bengali Unix Timestamp').main
-- Return true if Bengali year is leap
local function isLeapYear(year)
return ((year - 594) % 4 == 0)
end
local function format_date(day, month, year, format)
local components = { d = day, m = month, y = year }
local result = {}
for i = 1, #format do
local char = format:sub(i, i)
if components[char] then
table.insert(result, components[char])
else
table.insert(result, char)
end
end
return table.concat(result)
end
local BN_MONTH = {
[1] = "Boisakh",
[2] = "Joishtho",
[3] = "Ashar",
[4] = "Shrabon",
[5] = "Bhadro",
[6] = "Ashshin",
[7] = "Kartik",
[8] = "Ogrohayon",
[9] = "Poush",
[10] = "Magh",
[11] = "Falgun",
[12] = "Chaitro"
}
function p.main(frame)
local args = getArgs(frame)
local ts = args[1] or tostring(timestamp())
local format = "m d, y"
local isdate = ts:match("^%d+%-%d+%-%d+$") or ts:match("^%d+%s+%a+%s+%d+$")
if isdate then
ts =tonumber(timestamp(ts))
else
ts = tonumber(timestamp(args[2]))
format = args[1]
end
local second = 86400
local days = math.floor(ts / second)
local year = 1432 -- Adjust according to your epoch
if days >= 0 then
while true do
local leap = isLeapYear(year) and 366 or 365
if days < leap then break end
days = days - leap
year = year + 1
end
else
while true do
local leap = isLeapYear(year - 1) and 366 or 365
if -days <= leap then
year = year - 1
days = days + leap
break
end
days = days + leap
year = year - 1
end
end
local isLeap = isLeapYear(year)
local monthLengths = {31,31,31,31,31,31,30,30,30,30,30, isLeap and 30 or 29}
local month = 1
while days >= monthLengths[month] do
days = days - monthLengths[month]
month = month + 1
end
month = BN_MONTH[month]
local day = days + 1
return format_date(day, month, year, format)
end
return p
