Module:PageSummary

此模块的文档可以在Module:PageSummary/doc创建

local p = {}

-- 剥离 [[File:]] [[文件:]] [[Category:]] 等结构
local function stripImages(text)
    if not text or text == "" then return "" end
    
    text = text:gsub("%[%[(文件|Image|图像):", "[[File:")
           :gsub("%[%[(分类|Category):", "[[Category:")
    
    local out = {}
    local i = 1
    local len = #text
    
    while i <= len do
        if text:byte(i) == 91 and text:byte(i+1) == 91 then
            local chunk = text:sub(i, i+15)
            if chunk:match("^%[%[File:") or chunk:match("^%[%[Category:") then
                local depth = 1
                local j = i + 2
                while j <= len and depth > 0 do
                    if text:byte(j) == 91 and text:byte(j+1) == 91 then
                        depth = depth + 1
                        j = j + 2
                    elseif text:byte(j) == 93 and text:byte(j+1) == 93 then
                        depth = depth - 1
                        j = j + 2
                    else
                        j = j + 1
                    end
                end
                i = j
            else
                table.insert(out, text:sub(i, i+1))
                i = i + 2
            end
        else
            table.insert(out, text:sub(i, i))
            i = i + 1
        end
        
        if i > 1200 then break end
    end
    
    return table.concat(out)
end

-- 清理模板、引用、注释、标题、列表等
local function cleanFinal(text)
    if not text or text == "" then return "" end
    
    text = text
        :gsub("{{[^{}]*}}", "")
        :gsub("<ref.-</?ref[^>]*>", "")
        :gsub("<!%-%-.-%-%->", "")
        :gsub("\n==+[^=]+==+", " ")
        :gsub("\n%s*[*#:;]+", " ")
        :gsub("%s*\n%s*", " ")
        :gsub("%s+", " ")
    
    return mw.text.trim(text)
end

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, 500) or ""
    
    -- 提取第一张图片（多命名空间支持）
    local firstImage = nil
    for _, prefix in ipairs({"File:", "文件:", "Image:", "图像:"}) do
        firstImage = mw.ustring.match(rawExcerpt, "%[%[" .. prefix .. "([^|%]]+)")
        if firstImage then break end
    end
    
    if not firstImage then
        local full = mw.ustring.match(rawExcerpt, "%[%[([^%]]+)%]%]")
        if full then
            local ns, name = mw.ustring.match(full, "^([^:]+):(.+)$")
            if ns and (ns:lower() == "file" or ns == "文件" or ns:lower() == "image" or ns == "图像") then
                firstImage = ns .. ":" .. name
            end
        end
    end
    
    if firstImage then
        firstImage = mw.text.trim(firstImage)
        firstImage = mw.ustring.gsub(firstImage, "[%z%s<>\"]+", "")
        if firstImage == "" 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)
    
    local container = mw.html.create('div')
        :css('margin-bottom', '25px')
        :css('display', 'flow-root')
    
    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')
    
    -- 只有当提取到有效图片文件名时才输出图片代码
    if firstImage and firstImage ~= "" then
        textDiv:wikitext('[[' .. firstImage .. '|120px|right|link=' .. pageName .. ']]')
    end
    
    textDiv:wikitext(summary)
    
    return tostring(container)
end

return p