Module:Sandbox/DixonD/Datetime: Difference between revisions

Revision as of 16:48, 20 April 2013

Latest revision as of 07:20, 25 April 2013

(11 intermediate revisions by 2 users not shown)

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this.calendars = {};

function this:.registerCalendar(moduleName, ...)

moduleName = require(moduleName); --debug only: not lazily

for index in ... do

this.calendars[index#(this.calendars)] = moduleName; --indexed by number, module loaded lazily

for indexi in= 1, arg...n do

this.calendars[arg[i]] = moduleName; -- indexed by code, module loaded lazily

end;

end;

this:.registerCalendar("Module:Sandbox/DixonD/Datetime/Gregorian", "Gregorian", "g"); --first position is the default

this:.registerCalendar("Module:Sandbox/DixonD/Datetime/Julian", "Julian", "j");

-- more calendars may be added later in new modules pluggable here into this factory...

function this:.selectCalendar(index)

if index == nil then

index = 0; -- use the default calendar (Gregorian as set above)

end;

local calendar = this.calendars[index];

if calendar == nil then

return index; -- fast path: assume that index is a calendar object (not indexed) already loaded

end;

if type(calendar) == "string" then -- calendar is a string (i.e. a module name)

local moduleName = calendar;

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end;

end; -- else assume calendar is a valid calendar object

return calendar;

end;

-- main functions

function this:.julianDay(year, month, day, hour, minute, second, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return 1000;--debug only calendar:.julianDay(year, month, day, hour, minute, second);

end;

function this:.dateOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.dateOfJulianDay(julianDay);

end;

function this:.yearOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.yearOfJulianDay(julianDay);

end;

function this:.monthOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.monthOfJulianDay(julianDay);

end;

function this:.dayOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.dayOfJulianDay(julianDay);

end;

function this:.weekdayOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.weekdayOfJulianDay(julianDay);

end;

function this:.hourOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.hourOfJulianDay(julianDay);

end;

function this:.minuteOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.minuteOfJulianDay(julianDay);

end;

function this:.secondOfJulianDay(julianDay, calendar)

calendar = this:.selectCalendar(calendar);

if calendar == nil then

return tostring(Error.error{"Calendar ''" .. calendar .. "'' is either missing or unknown!"});

end;

return calendar:.secondOfJulianDay(julianDay);

end;