Module:PageSummary

此模块的文档可以在Module:PageSummary/doc创建

local p = {}

-- 辅助函数：安全清理标签
local function safeStrip(text)
    if not text then return "" end
    text = string.gsub(text, "<ref.-</ref>", "")
    text = string.gsub(text, "<ref.->", "")
    text = string.gsub(text, "<!%-%-.-%-%->", "")
    
    -- 彻底剥离带长描述的图片链接（处理嵌套 [[ ]]）
    local prefixes = {"[[File:", "[[Image:", "[[文件:", "[[图像:", "[[file:", "[[image:"}
    for _, pre in ipairs(prefixes) do
        while string.find(text, pre, 1, true) do
            local s = string.find(text, pre, 1, true)
            local count, e = 0, nil
            for j = s, mw.ustring.len(text) do
                local c2 = mw.ustring.sub(text, j, j+1)
                if c2 == "[[" then count = count + 1
                elseif c2 == "]]" then 
                    count = count - 1
                    if count == 0 then e = j + 1 break end
                end
            end
            if e then text = mw.ustring.sub(text, 1, s - 1) .. mw.ustring.sub(text, e + 1)
            else text = mw.ustring.sub(text, 1, s - 1) .. mw.ustring.sub(text, s + 2) end
        end
    end

    -- 移除模板（限制5层嵌套，防止CPU跑满）
    for i = 1, 5 do
        local nt = string.gsub(text, "{{[^{}]+}}", "")
        if nt == text then break end
        text = nt
    end

    text = string.gsub(text, "\n==+.-==+", " ") -- 删标题符
    text = string.gsub(text, "\n%s*[*#:]+", " ") -- 删列表符
    text = string.gsub(text, "&[Nn][Bb][Ss][Pp];", " ")
    text = string.gsub(text, "\n", " ")
    text = string.gsub(text, "%s+", " ")
    return mw.text.trim(text)
end

function p.getSummaryAndImage(frame)
    local pageName = frame.args[1] or ""
    local title = mw.title.new(pageName)
    if not title or not title.exists then return "" end
    
    local content = title:getContent()
    local rawExcerpt = mw.ustring.sub(content, 1, 500)

    -- 提取第一张图
    local firstImage = string.match(rawExcerpt, "%[%[([Ff]ile:.-)[|%]]") or 
                       string.match(rawExcerpt, "%[%[([Ii]mage:.-)[|%]]") or
                       string.match(rawExcerpt, "%[%[(文件:.-)[|%]]")

    local cleanText = safeStrip(rawExcerpt)

    -- 150字截断并处理链接残符
    local targetLen = 150
    local summary = mw.ustring.sub(cleanText, 1, targetLen)
    while mw.ustring.sub(summary, -1) == "[" do summary = mw.ustring.sub(summary, 1, -2) end

    local _, opens = string.gsub(summary, "%[%[", "")
    local _, closes = string.gsub(summary, "%]%]", "")
    if opens > closes then
        local rest = mw.ustring.sub(cleanText, targetLen + 1, targetLen + 100)
        local endLink = string.find(rest, "]]", 1, true)
        if endLink then summary = summary .. string.sub(rest, 1, endLink + 1)
        else local lastOpen = string.find(summary:reverse(), "%[%[")
             if lastOpen then summary = string.sub(summary, 1, #summary - lastOpen - 1) end
        end
    end
    
    summary = mw.text.trim(summary)
    if mw.ustring.len(cleanText) > targetLen then summary = summary .. "..." end

    -- 渲染
    local container = mw.html.create('div'):css({['margin-bottom']='25px', ['display']='flow-root'})
    if firstImage then
        container:wikitext('[[' .. firstImage .. '|150px|right|link=' .. pageName .. ']]')
    end
    container:tag('div')
        :css({['font-size']='1.3em', ['font-weight']='bold', ['margin-bottom']='6px'})
        :wikitext('[[' .. pageName .. ']]')
    container:tag('div')
        :css({['line-height']='1.6', ['color']='#202122', ['font-size']='0.95em'})
        :wikitext(summary)

    return tostring(container)
end

return p