Module:Person height

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-- This module implements [[Template:Infobox person/height]]

local p = {}

local function splitsuffix(s)
	local suffix = ''
	if mw.ustring.match(s,'^(.-)(<sup.*)$') then
		local a = mw.ustring.gsub(s, '^(.-)(<sup.*)$', '%1')
		local b = mw.ustring.gsub(s, '^(.-)(<sup.*)$', '%2')
		s = a
		suffix = b .. suffix
	end
	if mw.ustring.match(s,'^(.-)(%[%[[Cc]ategory:.*)$') then
		local a = mw.ustring.gsub(s, '^(.-)(%[%[[Cc]ategory:.*)$', '%1')
		local b = mw.ustring.gsub(s, '^(.-)(%[%[[Cc]ategory:.*)$', '%2')
		s = a
		suffix = b .. suffix
	end
	return s, suffix
end

local function clean(s)
	s = mw.ustring.gsub(s, '[Mm]etre', 'm')
	s = mw.ustring.gsub(s, '([^a])meter', '%1m') -- prevents "parameter" from being changed to "param"
	s = mw.ustring.gsub(s, '[Cc]enti', 'c') -- changes "centim" to "cm"
	s = mw.ustring.gsub(s, 'ms', 'm')
 	s = mw.ustring.gsub(s, 'm[%.,]', 'm')

	s = mw.ustring.gsub(s, '[Ff]eet', 'ft')
	s = mw.ustring.gsub(s, 'foot', 'ft')
	s = mw.ustring.gsub(s, 'ft[%.,]', 'ft')

	s = mw.ustring.gsub(s, '[Ii]nches', 'in')
	s = mw.ustring.gsub(s, '[Ii]nch', 'in')
	s = mw.ustring.gsub(s, 'ins', 'in')
	s = mw.ustring.gsub(s, 'in[%.,]', 'in')

	s = mw.ustring.gsub(s, '%[%[[Mm]%]%]s', '[[Metre|m]]')
	s = mw.ustring.gsub(s, '%[%[[Mm]|[Mm]%]%]', '[[Metre|m]]')
	s = mw.ustring.gsub(s, '%[%[[Cc]m%]%]s', '[[Centimetre|cm]]')
	s = mw.ustring.gsub(s, '%[%[[Cc]m|[Cc]m%]%]', '[[Centimetre|cm]]')
	s = mw.ustring.gsub(s, '%[%[[Cc]entim|cm%]%]', '[[Centimetre|cm]]')
	s = mw.ustring.gsub(s, '%[%[[Ii]n|in%]%]', '[[inch|in]]')
	
	s = mw.ustring.gsub(s, '(%d)%s+[Cc][Mm]', '%1&nbsp;cm')
	s = mw.ustring.gsub(s, '(%d)%s+[Mm]', '%1&nbsp;m')
	s = mw.ustring.gsub(s, '(%d)%s+[Ff][Tt]', '%1&nbsp;ft')
	s = mw.ustring.gsub(s, '(%d)%s+[Ii][Nn]', '%1&nbsp;in')
	
	s = mw.ustring.gsub(s, '(%d&[Nn][Bb][Ss][Pp];)[Cc][Mm]', '%1cm')
	s = mw.ustring.gsub(s, '(%d&[Nn][Bb][Ss][Pp];)[Mm]', '%1m')
	s = mw.ustring.gsub(s, '(%d&[Nn][Bb][Ss][Pp];)[Ff][Tt]', '%1ft')
	s = mw.ustring.gsub(s, '(%d&[Nn][Bb][Ss][Pp];)[Ii][Nn]', '%1in')
	
	s = mw.ustring.gsub(s, '(%d)%s*[′\']%s*([%d]%d*)%s*[\"″]', '%1 ft %2 in')

	return s
end

local function isnumber(s)
	if s then
		s = mw.ustring.gsub(s, '%+%s*%d+%s*/%s*%d+%s*$', '')
		s = mw.ustring.gsub(s, '%s*1%s*/%s*2%s*$', '0.5')
		return tonumber(s)
	end
	return nil
end

local function trimspace(s)
	if s then
		s = mw.ustring.gsub(s, '^%s*(.-)%s*$', '%1')
	end
	return s
end

local function force_unit(s, t)
	s = mw.ustring.gsub(s, '&[Nn][Bb][Ss][Pp];', '★')
	if (t == 'cm') then
		s = mw.ustring.gsub(s, '(%d*)%.(%d%d)(%d+[★%s]+)m', '%1%2.%3cm')
		s = mw.ustring.gsub(s, '(%d*)%.(%d%d)(%d+[★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%1%2.%3[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '(%d*)%.(%d%d)([★%s]+)m', '%1%2%3cm')
		s = mw.ustring.gsub(s, '(%d*)%.(%d%d)([★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%1%2%3[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '(%d*)%.(%d)([★%s]+)m', '%1%20%3cm')
		s = mw.ustring.gsub(s, '(%d*)%.(%d)([★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%1%20%3[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '(%d*)%.([★%s]+)m', '%100.%2cm')
		s = mw.ustring.gsub(s, '(%d*)%.([★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%100.%2[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '^(%s*%d+)([★%s]+)m', '%100%2cm')
		s = mw.ustring.gsub(s, '([%(★%s]%d+)([★%s]+)m', '%100%2cm')
		s = mw.ustring.gsub(s, '^(%s*%d+)([★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%100%2[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '([%(★%s]%d+)([★%s]+)%[%[[Mm]et[re][re]|m%]%]', '%100%2[[centimetre|cm]]')
		s = mw.ustring.gsub(s, '0(%d+%.?%d*[★%s]+cm)', '%1')
		s = mw.ustring.gsub(s, '0(%d+%.?%d*[★%s]+%[%[[Cc]entimet[re][re]|cm%]%])', '%1')
	else
		s = mw.ustring.gsub(s, '(%d)(%d%d)%.(%d*[★%s]+)cm', '%1.%2%3m')
		s = mw.ustring.gsub(s, '(%d)(%d%d)%.(%d*[★%s]+)%[%[[Cc]entimet[re][re]|cm%]%]', '%1.%2%3[[metre|m]]')
		s = mw.ustring.gsub(s, '(%d)(%d%d)([★%s]+)cm', '%1.%2%3m')
		s = mw.ustring.gsub(s, '(%d)(%d%d)([★%s]+)%[%[[Cc]entimet[re][re]|cm%]%]', '%1.%2%3[[metre|m]]')
		s = mw.ustring.gsub(s, '(%d%d)%.(%d*[★%s]+)cm', '0.%1%2m')
		s = mw.ustring.gsub(s, '(%d%d)%.(%d*[★%s]+)%[%[[Cc]entimet[re][re]|cm%]%]', '0.%1%2[[metre|m]]')
		s = mw.ustring.gsub(s, '(%d%d)([★%s]+)cm', '0.%1%2m')
		s = mw.ustring.gsub(s, '(%d%d)([★%s]+)%[%[[Cc]entimet[re][re]|cm%]%]', '0.%1%2[[metre|m]]')
	end
	s = mw.ustring.gsub(s, '★', '&nbsp;')
	return s
end

local function get_convert_args(s, prefer, enforce, ri)
	local prefer_m = (prefer or '') == 'm'
	local force_m = (enforce or '') == 'm'
	local prefer_cm = (prefer or '') == 'cm'
	local force_cm = (enforce or '') == 'cm'
	
	ri = (ri or '') == 'cmin' and 'cmin' or ''
	
	unconverted = clean(s or '') -- basic unit cleaning

	s = mw.ustring.gsub(unconverted, '&[Nn][Bb][Ss][Pp];', ' ')
	
	local m = mw.ustring.find(s, 'm')
	local c = mw.ustring.find(s, 'cm')
	local f = mw.ustring.find(s, 'ft')
	local i = mw.ustring.find(s, 'in')
	
	if m == nil and f == nil and i == nil then
		return '', unconverted
	end
	
	local adj = nil
	
	if c ~= nil and f == nil and i == nil then
		local n = mw.ustring.sub(s, 1, c - 1)
		if isnumber(n) then
			if force_m then
				local prec = require("Module:Math")._precision(trimspace(n))
				adj = (prec == 1) and 'ri3' or 'ri2'
			end
			if ri ~= '' then
				adj = force_m and 'ri2' or 'ri0'
			end
			return force_m
				and {n/100,'m','ftin',0,['abbr']='on', ['adj']=adj}
				or {n,'cm','ftin',0,['abbr']='on', ['adj']=adj}, mw.ustring.sub(s, c+2)
		end
		return '', unconverted
	end
	
	if m ~= nil and c == nil and f == nil and i == nil then
		local n = mw.ustring.sub(s, 1, m - 1)
		if ri ~= '' then
			adj = force_cm and 'ri0' or 'ri2'
		end
		if isnumber(n) then
			return force_cm 
				and {n*100,'cm','ftin',0,['abbr']='on',['adj']=adj}
				or {n,'m','ftin',0,['abbr']='on',['adj']=adj}, mw.ustring.sub(s, m+1)
		end
		return '', unconverted
	end
	
	if f ~= nil and i ~=nil and m == nil then
		local n1 = mw.ustring.sub(s, 1, f - 1)
		local n2 = mw.ustring.sub(s, f+2, i - 1)
		if isnumber(n1) and isnumber(n2) then
			if ri ~= '' then
				adj = 'ri0'
			end
			return (force_m or prefer_m)
				and {n1,'ft',n2,'in', 'm',2,['abbr']='on',['adj']=adj}
				or {n1,'ft',n2,'in', 'cm',0,['abbr']='on',['adj']=adj}, mw.ustring.sub(s, i+2)
		end
		return '', unconverted
	end
	
	if f ~= nil and i == nil and m == nil then
		local n = mw.ustring.sub(s, 1, f - 1)
		if isnumber(n) then
			if ri ~= '' then
				local n2 = 12*(n - math.floor(n))
				adj = 'ri0'
				return (force_m or prefer_m)
					and {math.floor(n),'ft',n2, 'in','m',2,['abbr']='on',['adj']=adj}
					or {math.floor(n),'ft',n2,'in','cm',0,['abbr']='on',['adj']=adj}, mw.ustring.sub(s, f+2)
			end
			return (force_m or prefer_m)
				and {n,'ft','m',2,['abbr']='on'}
				or {n,'ft','cm',0,['abbr']='on'}, mw.ustring.sub(s, f+2)
		end
		return '', unconverted
	end
	
	if i ~= nil and f == nil and m == nil then
		local n = mw.ustring.sub(s, 1, i - 1)
		if isnumber(n) then
			if ri ~= '' then
				adj = 'ri0'
			end
			return (force_m or prefer_m)
				and {n,'in','m',2,['abbr']='on'}
				or {n,'in','cm',0,['abbr']='on'}, mw.ustring.sub(s, i+2)
		end
		return '', unconverted
	end
	
	if force_cm and c == nil then
		return '', force_unit(unconverted, 'cm')
	end
	
	if force_m and c ~= nil then
		return '', force_unit(unconverted, 'm')
	end
	
	return '', unconverted
end

function convert(frame, args)
	local str, suffix = splitsuffix(args[1] or '')
	local targs, str = get_convert_args(str, args['prefer'] or '', args['enforce'] or '', args['ri'] or '')
	
	str = str .. suffix

	if type(targs) == 'table' then
		return frame:expandTemplate{ title = 'convert', args = targs} .. str
	else
		return str
	end
end

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

return p