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Documentation for this module may be created at Module:VarsUtil/doc

local util_args = require ('Module:ArgsUtil')
local binser = require('binser')
VariablesLua = mw.ext.VariablesLua

local p = {}

function p.getVar(var)
	local val = VariablesLua.var(var)
	if val == '' then
		return nil
	end
	return val
end

function p.getBool(var)
	local val = p.getVar(var)
	return util_args.castAsBool(val)
end

function p.setBool(var, val)
	if type(val) == 'string' then
		val = util_args.castAsBool(val)
	end
	if val then
		p.setVar(var, 'Yes')
		return
	end
	p.setVar(var, 'No')
end

function p.setVar(var, val)
	VariablesLua.vardefine(var, val)
	return val
end

function p.setVarOnlyIf(var, val)
	if not val then return end
	p.setVar(var, val)
end

function p.getGlobalIndex(name)
	local val = p.getVar('luaGlobalIndex' .. name)
	return tonumber(val) or 0
end

function p.setGlobalIndex(name)
	local n = p.getGlobalIndex(name) + 1
	p.setVar('luaGlobalIndex' .. name, n)
	return n
end

function p.resetGlobalIndex(name, val)
	val = val or 0
	p.setVar('luaGlobalIndex' .. name, val)
	return val
end

function p.appendToList(name, val, sep)
	-- this is just for helping to debug and shouldn't actually be used ever probably
	sep = sep or ', '
	local old_val = p.getVar(name) or ''
	p.setVar(name, old_val .. sep .. val)
end

function p.log(val)
	if type(val) == 'table' then
		p.logObject(val)
		return
	end
	p.appendToList('log', tostring(val))
end

function p.logObject(val)
	local tbl = {}
	for k, v in pairs(val) do
		tbl[#tbl+1] = k .. ': ' .. tostring(v)
	end
	p.appendToList('log', table.concat(tbl,', '))
end

function p.clearAll(tbl)
	for _, v in ipairs(tbl) do
		p.setVar(v, '')
	end
end

function p.setTypedVar(var, val)
	local val_to_store = binser.serialize(val)
	p.setVar(var, val_to_store)
end

function p.getTypedVar(var)
	local val = p.getVar(var)
	if not val then
		return nil
	end
	return binser.deserialize(val)[1]
end

function p.setObject(var, val)
	local val_to_store = binser.serialize(val)
	p.setVar(var, val_to_store)
end

function p.getObject(var)
	local val = p.getVar(var)
	if not val then
		return nil
	end
	return binser.deserialize(val)[1]
end

return p
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