Module:tln-conj

---

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local p = {}

----------------------------------------------------------------
-- ENDINGS
----------------------------------------------------------------

local endings = {
    are = {
        pres_1s = "§1S_ARE§",
        pres_2s = "§2S_ARE§",
        pres_3s = "§3S_ARE§",
        pres_1p = "§1P_ARE§",
        pres_2p = "§2P_ARE§",
        pres_3p = "§3P_ARE§",

        past_1s = "§P1S_ARE§",
        past_2s = "§P2S_ARE§",
        past_3s = "§P3S_ARE§",
        past_1p = "§P1P_ARE§",
        past_2p = "§P2P_ARE§",
        past_3p = "§P3P_ARE§"
    },

    ere = {
        pres_1s = "ᠣ",
        pres_2s = "ᠡᠰ",
        pres_3s = "ᠡᠲ",
        pres_1p = "ᠡᠨᠤᠰ",
        pres_2p = "ᠡᠴᠢᠰ",
        pres_3p = "ᠡᠨ",

        past_1s = "§P1S_ERE§",
        past_2s = "§P2S_ERE§",
        past_3s = "§P3S_ERE§",
        past_1p = "§P1P_ERE§",
        past_2p = "§P2P_ERE§",
        past_3p = "§P3P_ERE§"
    },

    ire = {
        pres_1s = "§1S_IRE§",
        pres_2s = "§2S_IRE§",
        pres_3s = "§3S_IRE§",
        pres_1p = "§1P_IRE§",
        pres_2p = "§2P_IRE§",
        pres_3p = "§3P_IRE§",

        past_1s = "§P1S_IRE§",
        past_2s = "§P2S_IRE§",
        past_3s = "§P3S_IRE§",
        past_1p = "§P1P_IRE§",
        past_2p = "§P2P_IRE§",
        past_3p = "§P3P_IRE§"
    }
}

----------------------------------------------------------------
-- CLASS DETECTION
----------------------------------------------------------------

local function detect_class(title)
    if mw.ustring.match(title, "ᠠᠷᠡ$") then
        return "are"
    elseif mw.ustring.match(title, "ᠡᠷᠡ$") then
        return "ere"
    elseif mw.ustring.match(title, "ᠢᠷᠡ$") then
        return "ire"
    end
    return nil
end

local function get_stem(title, class)
    if class == "are" then
        return mw.ustring.gsub(title, "ᠠᠷᠡ$", "")
    elseif class == "ere" then
        return mw.ustring.gsub(title, "ᠡᠷᠡ$", "")
    elseif class == "ire" then
        return mw.ustring.gsub(title, "ᠢᠷᠡ$", "")
    end
    return title
end

----------------------------------------------------------------
-- TRANSLITERATION
----------------------------------------------------------------

local translit = {
    ["ᠠ"] = "a",
    ["ᠡ"] = "e",
    ["ᠢ"] = "i",
    ["ᠣ"] = "o",
    ["ᠤ"] = "u",
    ["ᠷ"] = "r",
    ["ᠸ"] = "v",
    ["ᠵ"] = "z",
    ["ᠰ"] = "s",
    ["ᠲ"] = "t",
    ["ᠨ"] = "n",
    ["ᠴ"] = "č"
}

local function romanize(text)
    local result = text
    for bichig, latin in pairs(translit) do
        result = mw.ustring.gsub(result, bichig, latin)
    end
    return result
end

----------------------------------------------------------------
-- DISPLAY HELPERS
----------------------------------------------------------------

local function make_cell(form)
    return "<div style='text-align:center;'>"
        .. "[[" .. form .. "]]"
        .. "<br /><span style='color:#777777; font-size:90%;'>"
        .. romanize(form)
        .. "</span></div>"
end

----------------------------------------------------------------
-- MAIN FUNCTION
----------------------------------------------------------------

function p.show(frame)

    local args = frame:getParent().args
    local title = mw.title.getCurrentTitle().text

    local class = args.class or detect_class(title)
    if not class then
        return "Error: could not determine conjugation class."
    end

    local stem = get_stem(title, class)

    local forms = {}

    for slot, ending in pairs(endings[class]) do
        if args[slot] and args[slot] ~= "" then
            forms[slot] = args[slot]
        else
            forms[slot] = stem .. ending
        end
    end

    local text =
        '{| class="wikitable mw-collapsible mw-collapsed"\n'
        .. '|+ Conjugation of [[' .. title .. ']] (<span style="color:#777777;">' .. romanize(title) .. '</span>)\n'

        ----------------------------------------------------------------
        -- HEADER
        ----------------------------------------------------------------

        .. '|-\n'
        .. '! Mood !! Tense !! colspan="3" | Singular !! colspan="3" | Plural\n'

        .. '|-\n'
        .. '!  !!  !! 1st !! 2nd !! 3rd !! 1st !! 2nd !! 3rd\n'

        ----------------------------------------------------------------
        -- PRESENT
        ----------------------------------------------------------------

        .. '|-\n'
        .. '! Indicative !! Present\n'
        .. '| ' .. make_cell(forms.pres_1s)
        .. ' || ' .. make_cell(forms.pres_2s)
        .. ' || ' .. make_cell(forms.pres_3s)
        .. ' || ' .. make_cell(forms.pres_1p)
        .. ' || ' .. make_cell(forms.pres_2p)
        .. ' || ' .. make_cell(forms.pres_3p)
        .. '\n'

        ----------------------------------------------------------------
        -- PAST
        ----------------------------------------------------------------

        .. '|-\n'
        .. '! Indicative !! Past\n'
        .. '| ' .. make_cell(forms.past_1s)
        .. ' || ' .. make_cell(forms.past_2s)
        .. ' || ' .. make_cell(forms.past_3s)
        .. ' || ' .. make_cell(forms.past_1p)
        .. ' || ' .. make_cell(forms.past_2p)
        .. ' || ' .. make_cell(forms.past_3p)
        .. '\n'

        .. '|}'

    return text
end

return p