မဝ်ဂျူ:pra-Deva-translit

Documentation for this module may be created at မဝ်ဂျူ:pra-Deva-translit/doc

local export = {}

local consonants = {
	['क']='k', ['ख']='kh', ['ग']='g', ['घ']='gh', ['ङ']='ṅ',
	['च']='c', ['छ']='ch', ['ज']='j', ['झ']='jh', ['ञ']='ñ', 
	['ट']='ṭ', ['ठ']='ṭh', ['ड']='ḍ', ['ढ']='ḍh', ['ण']='ṇ', 
	['त']='t', ['थ']='th', ['द']='d', ['ध']='dh', ['न']='n', 
	['प']='p', ['फ']='ph', ['ब']='b', ['भ']='bh', ['म']='m',
	['य']='y', ['र']='r', ['ल']='l', ['व']='v', ['ळ']='ḷ',
	['श']='ś', ['ष']='ṣ', ['स']='s', ['ह']='h',
	['य़']='ẏ', 
}

local diacritics = {
	['ा']='ā', ['ि']='i', ['ी']='ī', ['ु']='u', ['ू']='ū', ['ृ']='ṛ', ['ॄ']='ṝ', 
	['ॢ']='ḷ', ['ॣ']='ḹ', ['ॆ']='ĕ', ['े']='e', ['ै']='ai', ['ॊ']='ŏ', ['ो']='o', ['ौ']='au',  ['्']='',
}

local diatrema = { -- vowels with diaereis added in transliteration
	['इ']='ï', ['उ']='ü',
}

local tt = {
	-- vowels
	['अ']='a', ['आ']='ā', ['इ']='i', ['ई']='ī', ['उ']='u', ['ऊ']='ū', ['ऋ']='ṛ', ['ॠ']='ṝ',
	['ऌ']='ḷ', ['ॡ']='ḹ', ['ऎ']='ĕ', ['ए']='e', ['ऐ']='ai', ['ऒ']='ŏ', ['ओ']='o', ['औ']='au',
	-- chandrabindu
	['ँ']='m̐', --until a better method is found
	-- anusvara
	['ं']='ṃ', --until a better method is found
	--numerals
	['०']='0', ['१']='1', ['२']='2', ['३']='3', ['४']='4', ['५']='5', ['६']='6', ['७']='7', ['८']='8', ['९']='9',
	--punctuation        
    ['॥']='.', --double danda
	['।']='.', --danda
    --Om
    ['ॐ']='oṃ',
    --reconstructed
    ['*'] = '',
}

function export.tr(text, lang, sc)
	if sc ~= "Deva" then
		return nil
	end

	text = mw.ustring.gsub(text, '(े)([अ-ह][़]?)(्)([अ-ह][़]?)', 'ॆ%2%3%4')
	text = mw.ustring.gsub(text, '(ए)([अ-ह][़]?)(्)([अ-ह][़]?)', 'ऎ%2%3%4')
	text = mw.ustring.gsub(text, '(ो)([अ-ह][़]?)(्)([अ-ह][़]?)', 'ॊ%2%3%4')
	text = mw.ustring.gsub(text, '(ओ)([अ-ह][़]?)(्)([अ-ह][़]?)', 'ऒ%2%3%4')
	
	text = mw.ustring.gsub(
		text,
		'([क-ह][़]?)'..
		'([ािीुूृॄॢॣॆेैॊोौ्]?)'..
		'([इउ]?)',
		function(c, d, e)
			if d == "" and e ~= "" then        
				if tt[e] == "i" or tt[e] == "u" then return consonants[c] .. 'a' .. tt[e] .. '̈'
				else return consonants[c] .. 'a' .. tt[e] end
			elseif e ~= "" then
				return consonants[c] .. diacritics[d] .. tt[e]
			elseif d == "" then        
				return consonants[c] .. 'a'
			else
				return consonants[c] .. diacritics[d]
			end
		end)

-- Adjacent vowel letters needing dieresis
	text = mw.ustring.gsub(text, '([अ])([इउ])', function(a, b) return tt[a]..diatrema[b] end)
 
	text = mw.ustring.gsub(text, '.', tt)
	
	return text
end
 
return export