モジュール:Utility/Library

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local aw = {}

function aw.shallowCopy(obj)
	local typename = type(obj)
	local copy
	if typename == 'table' then
		copy = {}
		for key, value in pairs(obj) do
			copy[key] = value
		end
	else
		copy = obj
	end
    return copy
end

function aw.getTableKeys(tbl)
	local keyset = {}
	for k, _ in pairs(tbl) do
		keyset[#keyset + 1] = k
	end
	return keyset
end

function aw.getAsBoolean(strOrNumOrBool, defaultValue)
	defaultValue = defaultValue or false
	
	local typename = type(strOrNumOrBool)
	if typename == 'boolean' then
		return strOrNumOrBool
	elseif typename == 'number' then
		return strOrNumOrBool ~= 0
	elseif typename == 'string' then
		local str = string.lower(strOrNumOrBool)
		return str == 'true' or str == 't' or str == '1'
	else
		return defaultValue
	end
end

function aw.getAsNumber(strOrNum, defaultValue)
	defaultValue = defaultValue or 0
	
	local typename = type(strOrNum)
	if typename == 'number' then
		return strOrNum
	elseif typename == 'string' then
		return tonumber(strOrNum)
	else
		return defaultValue
	end
end

function aw.escapeHtml(html)
	local result, _ = html
		:gsub('&', '&')
		:gsub('"', '"')
	return result
end

function aw.round(num)
	return math.floor(tonumber(string.format("%.4f", num)) + 0.5)
end

function aw.roundover(num)
	return math.ceil(tonumber(string.format("%.4f", num)) - 0.5)
end

function aw.selectiveRound(num, useRound)
	if useRound or false then
		return aw.round(num)
	else
		return aw.roundover(num)
	end
end

-- 数字にカンマをつける関数
function aw.comma(amount)
	local formatted = amount
	while true do
		formatted, k = string.gsub(formatted, "^(-?%d+)(%d%d%d)", '%1,%2')
		if k == 0 then
			break
		end
	end
	return formatted
end

-- 一部分に同じ要素をもつ配列をテキスト化する関数
local function toRepeatingString(cache, count)
	if count > 1 then
		return cache .. '×' .. count
	else
		return cache
	end
end

function aw.stringifyRepeatingArray(array, separator)
	local cache = array[1]
	local count = 0
	local output = nil
	for _, damage in ipairs(array) do
		if cache == damage then
			count = count + 1
		else
			local text = toRepeatingString(cache, count)
			if output ~= nil then
				output = output .. separator .. text
			else
				output = text
			end
			cache = damage
			count = 1
		end
	end
	
	local text = toRepeatingString(cache, count)
	if output ~= nil then
		output = output .. separator .. text
	else
		output = text
	end
	return output
end

return aw