Module:gd-stem-type

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---

local export = {}

local broad_vowels = {'a','à','o','ò','u','ù','A','À','O','Ò','U','Ù'}
local slender_vowels = {'e','è','i','ì','E','È','I','Ì'}

local function has_value(tab, val)
    for _, value in ipairs(tab) do
        if value == val then
            return true
        end
    end
    
    return false
end

function export._getParameters(frame_args, arg_list)
	local new_args = {};
	local index = 1;
	local value;
	
	for _, arg in ipairs(arg_list) do
		value = frame_args[arg]
		if value == nil then
			value = frame_args[index];
			index = index + 1;
		end
		new_args[arg] = value;
	end
	
	return new_args;
end

function export.show(frame)
	local new_args = export._getParameters(frame.args, { 'stem' });
	local stem = new_args['stem'] or '';
	local stem_rev = string.reverse(stem)
	for i = 1, #stem_rev do
		if has_value(broad_vowels, stem_rev:sub(i,i)) then
			return 'broad'
		end
		if has_value(slender_vowels, stem_rev:sub(i,i)) then
			return 'slender'
		end
	end
	
	return "broad"
end

return export