模块:TemplateDemo

此模块的文档可以在模块:TemplateDemo/doc创建

local html = mw.html

local template_demo = {}

local function trim(str)
	return string.gsub(str, "^%s*(.-)%s*$", "%1")
end

local function parse_template_data(title)
	local content = mw.title.new(title).content
	local raw = string.match(content, "<templatedata>(.-)</templatedata>")
	if raw == nil then
		return nil
	end
	local succ, res = pcall(mw.text.jsonDecode, raw)
	return succ and res or nil
end

local function append_template_argument(t, k, v, last_num_param)
	local k_num = tonumber(k)
	if k_num ~= nil then
		if k_num == 1 then
			k = nil
		else
			k = tostring(k_num - 1)
			v = trim(v)
		end
	end
	if k ~= nil then
		t[#t+1] = "| "
		if k_num == nil or last_num_param ~= k_num - 1 then
			t[#t+1] = k
			t[#t+1] = " = "
		end
		t[#t+1] = v
		t[#t+1] = "\n"
	end
	return k_num
end

template_demo.show = function(frame)
	local args = frame.args
	local template_name = args[1]

	if template_name == nil or template_name == '' then
		return html.create("p"):addClass("error")
			:wikitext("没有指定模板名！")
	end
	
	local template_data = parse_template_data("Template:"..template_name)
	local args = frame:getParent().args
	
	local t = {"{{", trim(template_name), "\n"}
	local last_num_param = 1
	
	if template_data ~= nil and type(template_data.paramOrder) == "table" then
		local order = template_data.paramOrder
		for i = 1, #order do
			local k = order[i]
			local k_num = tonumber(k)
			k = k_num and k_num + 1 or k
			local v = args[k]
			if v ~= nil then
				last_num_param =
					append_template_argument(t, k, v, last_num_param)
			end
		end
	else
		for k, v in pairs(args) do
			last_num_param =
				append_template_argument(t, k, v, last_num_param)
		end
	end
	
	t[#t+1] = "}}"
	
	local source = table.concat(t)
	return frame:preprocess(
		source
		.."\n示例代码：\n<syntaxhighlight lang=\"wikitext\">"..source.."\n</syntaxhighlight>")
end

return template_demo