-- Transliteration for Bhojpuri
local export = {}
local gsub = mw.ustring.gsub
local match = mw.ustring.match
local conv = {
-- 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',
['ड़'] = 'ṛ', ['ढ़'] = 'ṛh',
-- ['ज्ञ'] = 'gy',
-- vowel diacritics
['ि'] = 'i', ['ु'] = 'u', ['े'] = 'ē', ['ॆ'] = 'e', ['ो'] = 'ō', ['ॊ'] = 'o',
['ा'] = 'ā', ['ी'] = 'ī', ['ू'] = 'ū',
['ृ'] = 'ŕ',
['ै'] = 'ai', ['ौ'] = 'au',
['ॉ'] = 'ŏ',
['ॅ'] = 'ĕ',
['ऽ'] = 'ː',
['꣱'] = 'aː',
-- vowel signs
['अ'] = 'a', ['इ'] = 'i', ['उ'] = 'u', ['ए'] = 'ē',['ऎ'] = 'e', ['ओ'] = 'ō',['ऒ'] = 'o',
['आ'] = 'ā', ['ई'] = 'ī', ['ऊ'] = 'ū',
['ऋ'] = 'ŕ',
['ऐ'] = 'ai', ['औ'] = 'au',
['ऑ'] = 'ŏ',
['ऍ'] = 'ĕ',
['व़'] = 'ü',
['य़'] = 'ï',
['ॐ'] = 'ōm',
-- chandrabindu
['ँ'] = '̃',
-- anusvara
['ं'] = 'ṁ',
-- visarga
['ः'] = 'ḥ',
-- virama
['्'] = '',
-- numerals
['०'] = '0', ['१'] = '1', ['२'] = '2', ['३'] = '3', ['४'] = '4',
['५'] = '5', ['६'] = '6', ['७'] = '7', ['८'] = '8', ['९'] = '9',
-- punctuation
['।'] = '.', -- danda
['+'] = '', -- compound separator
-- abbreviation sign
['॰'] = '.',
}
local nasal_assim = {
['ज़'] = 'न',
['क'] = 'ङ', ['ख'] = 'ङ', ['ग'] = 'ङ', ['घ'] = 'ङ',
['च'] = 'ञ', ['छ'] = 'ञ', ['ज'] = 'ञ', ['झ'] = 'ञ',
['ट'] = 'ण', ['ठ'] = 'ण', ['ड'] = 'ण', ['ढ'] = 'ण',
['प'] = 'म', ['फ'] = 'म', ['ब'] = 'म', ['भ'] = 'म', ['म'] = 'म',
}
local perm_cl = {
['म्ल'] = true, ['व्ल'] = true, ['न्ल'] = true,
}
local all_cons, special_cons = 'कखगघङचछजझञटठडढतथदधपफबभशषसयरलवहणनम', 'यरलवहनम'
local vowel, vowel_sign = 'aिुृेोाीूैौॉॅ꣱', 'अइउएओआईऊऋऐऔऑऍऽ꣱'
local syncope_pattern = '([' .. vowel .. vowel_sign .. '])(़?[' .. all_cons .. '])a(़?[' .. gsub(all_cons, "य", "") .. '])([ंँ]?[' .. vowel .. vowel_sign .. '])'
local function rev_string(text)
local result, length = {}, mw.ustring.len(text)
for i = 1, length do
table.insert(result, mw.ustring.sub(text, length - i + 1, length - i + 1))
end
return table.concat(result)
end
function export.tr(text, lang, sc)
text = gsub(
text,
'([' .. all_cons .. ']़?)([' .. vowel .. '्]?)',
function(c, d)
return c .. (d == "" and 'a' or d)
end
)
for word in mw.ustring.gmatch(text, "[ऀ-ॿa]+") do
local orig_word = word
word = rev_string(word)
word = gsub(
word,
'^a(़?)([' .. all_cons .. '])(.)(.?)',
function(opt, first, second, third)
local a = ""
if match(first, '[' .. special_cons .. ']')
and match(second, '्')
and not perm_cl[first..second..third]
or match(first .. second, 'य[ीेै]') then
a = "a"
end
return a .. opt .. first .. second .. third
end
)
while match(word, syncope_pattern) do
word = gsub(word, syncope_pattern, '%1%2ᵊ%3%4')
end
word = gsub(
word,
'(.?)ं(.)',
function(succ, prev)
local mid = nasal_assim[succ] or "n"
if succ..prev == "a" then
mid = "्म"
elseif succ == "" and match(prev, '[' .. vowel .. ']') then
mid = "̃"
end
return succ .. mid .. prev
end
)
text = gsub(text, orig_word, rev_string(word))
end
text = gsub(text, '.़?', conv)
text = gsub(text, 'a([iu])̃', 'a͠%1')
text = gsub(text, 'ज्ञ', conv)
return mw.ustring.toNFC(text)
end
return export
