Module:Person date

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This module is intended to aid in calculating/formatting birth dates and death dates in {{Infobox person}} and other People and person infobox templates.

This module generates errors when it encounters invalid input. Error descriptions and how to fix them are listed at Category:Pages using age template with invalid date.

Usage

• {{#invoke:person date|birth}}
• {{#invoke:person date|death}}

In infoboxes

{{Infobox
...
| label# = Born
| data#  = {{#invoke:person date|birth}}

| label# = Died
| data#  = {{#invoke:person date|death}}
...
}}

Or

{{Infobox
...
| label#    = Born
| data#     = {{br separated entries
   |1={{#if:{{{birth_name|}}}|<div style="display:inline" class="nickname">{{{birth_name|}}}</div>}}
   |2={{#invoke:person date|birth}}
   |3={{#if:{{{birth_place|}}}|<div class="birthplace">{{{birth_place|}}}</div>}}
}}

| label#    = Died
| data#     = {{br separated entries
  |1={{#invoke:person date|death}}
  |2={{#if:{{{death_place|}}}|<div class="deathplace">{{{death_place|}}}</div>}}
}}
...
}}

Areas for improvement

1. Currently the module does not handle anything that is not a simple date. So anything with a reference tag is not evaluated by the code.
2. If |birth_date={{bda|1993|11|7}} (for example) then |death_date= will not be parsed. It will just be returned as the original string. Thus no age is calculated.

Tracking categories

• Category:Pages where birth or death is being automatically determined (77,256)
• Category:Pages using age template with invalid date (0)
• Category:Pages with invalid birth or death dates (4,547)

The above documentation is transcluded from Module:Person date/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (edit | run) pages.
Subpages of this module.

local p = {}

function is_valid_date(str)
	local months = '(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|Jun(?:e)?|Jul(?:y)?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)'
	months = '[Jan|January|Feb|February|Mar|March|Apr|April|May|Jun|June|Jul|July|Aug|August|Sep|September|Oct|October|Nov|November|Dec|December]*'
	regex = '^%d+%s*'..months..'*%s*%d%d%d%d' 
	mw.log('-----')
	mw.log(str)
	
	
	match = mw.ustring.match(str,'^%d+%s*'..months..'%s*%d%d%d%d') or mw.ustring.match(str,'^'..months..'%s*%d+,%s*%d%d%d%d') or mw.ustring.match(str,'^'..months..'%s*%d%d%d%d')
	if match ~= nil then
		mw.log(match)
		return match
	end
	
	return match
end

function is_year_only(str)
	return mw.ustring.match(str, '^%s*%d%d%d%d%s*$')
end

function parse_birth(frame, args)
	local birth_date = args[1] or ''
	local death_date = args[2] or ''
	local original = birth_date
	
	if is_valid_date(birth_date) then
		if death_date == '' then
			return frame:expandTemplate{ title = 'Birth date and age text', args = {birth_date}}
		else
			return frame:expandTemplate{ title = 'Birth date', args = {birth_date}}
		end
	end
	if is_year_only(birth_date) then
		if death_date == '' then
			return frame:expandTemplate{ title = 'bya', args = {birth_date}}
		else
			return frame:expandTemplate{ title = 'birth year', args = {birth_date}}
		end
	end
	
	return original
end

function p.birth(frame)
	return parse_birth(frame, frame.args[1] and frame.args or frame:getParent().args)
end

function p.death(frame)
	return parse_death(frame, frame.args[1] and frame.args or frame:getParent().args)
end



return p