Module:PageSummary

此模块的文档可以在Module:PageSummary/doc创建

function p.getSummaryAndImage(frame)
    local pageName = mw.text.trim(frame.args[1] or "")
    if pageName == "" then return "" end
    
    local title = mw.title.new(pageName)
    if not title or not title.exists then return "" end
    
    local content = title:getContent()
    if not content or content == "" then return "" end
    
    local rawExcerpt = mw.ustring.sub(content, 1, 600) or ""  -- 再加大范围
    
    -- 严格提取图片文件名（只取有效部分）
    local firstImage = nil
    for _, prefix in ipairs({"File:", "文件:", "Image:", "图像:"}) do
        firstImage = mw.ustring.match(rawExcerpt, "%[%[" .. prefix .. "([^|%]]+)%f[|%]]")
        if firstImage then break end
    end
    
    -- 如果匹配失败，不 fallback 到页面名，保持 nil
    if firstImage then
        firstImage = mw.text.trim(firstImage)
        -- 清理非法字符（防止编码损坏）
        firstImage = mw.ustring.gsub(firstImage, "[%z%s<>\"]+", "")
        -- 太短或空字符串视为无效
        if mw.ustring.len(firstImage) < 5 then
            firstImage = nil
        end
    end
    
    local step1     = stripImages(rawExcerpt) or ""
    local cleanText = cleanFinal(step1) or ""
    
    local targetLen = 120
    local summary   = cleanText:sub(1, targetLen * 2) or ""
    
    local ulen = mw.ustring.len(summary) or 0
    if ulen > targetLen then
        summary = mw.ustring.sub(summary, 1, targetLen) or ""
        
        local rev = summary:reverse()
        local lastBreak = rev:find("[ %s%p，。！？；：,…]") or 1
        if lastBreak > 1 and lastBreak < 20 then
            summary = mw.ustring.sub(summary, 1, #summary - lastBreak + 1) or ""
        end
        
        summary = mw.text.trim(summary) .. "..."
    end
    
    summary = mw.text.trim(summary)
    
    -- 构建 HTML
    local container = mw.html.create('div')
        :css('margin-bottom', '25px')
        :css('display', 'flow-root')
    
    -- 标题
    container:tag('div')
        :css('font-size', '1.3em')
        :css('font-weight', 'bold')
        :css('margin-bottom', '6px')
        :css('border-bottom', '1px solid #eee')
        :wikitext('[[' .. pageName .. ']]')
    
    local textDiv = container:tag('div')
        :css('line-height', '1.6')
        :css('color', '#222')
        :css('font-size', '14px')
    
    -- 只有当 firstImage 是有效字符串时才添加图片（避免任何泄漏）
    if firstImage and firstImage ~= "" and mw.ustring.find(firstImage, ":") then
        local imgWikitext = '[[' .. firstImage .. '|120px|right|link=' .. pageName .. ']]'
        textDiv:wikitext(imgWikitext)
    end
    
    textDiv:wikitext(summary)
    
    return tostring(container)
end