[LUA] get Day of next week

[hodleo]

tfs 0.3.5 / 0.3.6
I need a globalevent that doesn't repeat twice per week, therefore I'd need a function that returns day of the next week as monthday number

I've googled this a bit but it appears in python, msexcel, etc

function getYearDay(dd, mm, yy)
    return os.date('*t',os.time{year = yy, month = mm, day = dd})['yday']
end

the main function I haven't managed to finish, in this case the sunday of next week since current time, in yearday format

function getNextSunday()
        local value = 0
    for day = os.date('%j')+1, os.date('%j')+7 do
        if day <= getYearDay(31, 12, 2012) then
            if os.date('%A') == 'Sunday' then --smth like if os.date(iterator's day, iterator's month) -> 'Sunday'
                return --to return the next Sunday's monthday #
            end
        end
    end
end

there's that thing of leap year too


--so far I got this, but it could be reduced I guess

function getMonthDays(mm, yy)
    return os.date('*t',os.time{year = yy, month = mm+1, day = 0})['day']
end

function getNextDay(name)
    local mm, yy = os.date('%m'), os.date('%Y')
    for day = os.date('%d')+1, os.date('%d')+7 do
        if day > getMonthDays(mm, yy) then
            mm = mm+1
            day = day-getMonthDays(mm, yy)
        end
        if os.date('%A',os.time{year = yy, month = mm, day = day}) == name then
            return day
        end
    end
end

print(getNextDay('Sunday'))

 

[VirrageS]

Is this globalevent executing in randomly days? This week in Sunday in next week in Friday and then in next week in Monday?

 

[hodleo]

always a random day, but for ex if execution day is Monday, the randomizer can pick another day of same week(Tuesday, etc)
I'm changing the script's globalstorage dayname string to yearday or weekday number for this

 

[VirrageS]

It can't be something like that?

function ...
	if os.date('%A', getGlobalStorage(storage)) == os.date('%A', os.time(t)) then -- check that today is day to execute
		-- execute script
		doSetGlobalStorage(storage, os.time(t) + math.random(1,7)*3600*24) -- random day +1 - +7
	end
end

 

[hodleo]

this will do it for me, but it's inefficient

function getMonthDays(mm, yy)
	return os.date('*t',os.time{year = yy, month = mm+1, day = 0})['day']
end


function getDayofNextWeek(name)
    local dd, mm, yy = os.date('%d'), os.date('%m'), os.date('%Y')
    for i = 1, 9 do
        day = dd+i
        if day > getMonthDays(mm, yy) then
            mm = os.date('%m')+1
            if mm > 12 then
                mm = 1
                yy = os.date('%Y')+1
            end
            day = math.abs(getMonthDays(mm, yy)-dd-i+1)
        end
        if day > 0 and os.date('%A',os.time{year = yy, month = mm, day = day}) == name then
            return day
        end
    end
end

print(getDayofNextWeek('Sunday'))

even if next desired day is in another month or year

 

[VirrageS]

What about this?

function getDayofNextWeek(name)
    for i = 1, 9 do
        if os.date('%A', os.time(t)+24*3600*i) == name then
            return os.date('%d', os.time(t)+24*3600*i)
        end
    end
end
 
print(getDayofNextWeek('Friday'))