模組:Reaction

-- implement {{Reaction}}
local p = {}
local mIfexist

local function mayMakeFile(iconInput)
	local success, title = pcall(mw.title.new, iconInput)
	if success and title and title.namespace == 6 then
		if not mIfexist then
			mIfexist = require('Module:Ifexist')
		end
		-- if title.file.exists then
		if mIfexist._pfFileExists(title) then
			return string.format('[[File:%s|x20px|link=]]', title.text)
		end
	end
	return false
end

local function stripInputCount(inputCount, realCount)
	if inputCount ~= nil then
		inputCount = mw.text.trim(inputCount)
		if inputCount == "" then
			return "0"
		else
			-- 示例使用了 99+ 所以這裡也允許尾隨 + 號
			-- 順便把前導 0 也丟掉
			local num = mw.ustring.match(inputCount, "^0*(%d+%+?)$")
			if num then
				return num
			end
		end
	end
	return tostring(realCount)
end

function p.main(frame)
	local parent = frame:getParent()
	if not parent then
		-- 不是模板被引用
		return ''
	end
	local args = parent.args
	local iconInput = args[0] or "👍"
	iconInput = mw.text.trim(iconInput)
	if mw.ustring.find(iconInput, "\n") then
		-- TODO 這種情況按照 MediaWiki 舊解析器鐵定是炸的
	end
	local iconDisplay = mayMakeFile(iconInput) or iconInput
	local iconData = mw.text.unstrip(iconInput)

	local reactions = {}
	while true do
		local currentItem = args[1 + #reactions + 1] -- 反應者從第二個參數開始
		if currentItem == nil then
			break
		end
		currentItem = mw.text.trim(currentItem)
		if currentItem == '' then
			break
		end
		table.insert(reactions, currentItem)
	end
	local realRectionCount = #reactions -- 真實計數
	local reactionCount = stripInputCount(args.num, realRectionCount) -- 顯示的計數

	local out = mw.tag.create('span')
		:addClass('reactionable')
		:addClass('template-reaction')
		:attr('title', mw.text.listToText(reactions, '、', '和') .. '回应了这条留言')
		:attr('data-reaction-commentors', table.concat(reactions, '/'))
		:attr('data-reaction-icon', iconData)
		:attr('data-reaction-count', rectionCount)
		:attr('data-reaction-real-count', realRectionCount)

	local content = out:tag('span')
		:addClass('reaction-content')

	-- icon
	content:tag('span')
		:addClass('reaction-icon-container')
		:tag('span')
			:addClass('reaction-icon')
			:wikitext(iconDisplay)
	
	-- counter
	content:tag('span')
		:addClass('reaction-counter-container')
		:tag('span')
			:addClass('reaction-counter')
			:wikitext(rectionCount)
	
	return frame:extensionTag({ name = 'templatestyles', args = { src = 'Template:Reaction/styles.css' } }) .. tostring(out)
end

return p