Module:ImageTabber

This Module is used in at least Template:YYMMDD Infobox and can be invoked as needed.

---

local p = {}

function p.format(frame)
    local imageParam = frame.args[1] or ""
    local width = frame.args.width or "350px"

    -- Return empty if no image provided
    if imageParam == "" then
        return ""
    end

    -- Check if multiple images (contains comma)
    if not imageParam:find(",") then
        -- Single image - check for and strip optional tab title prefix
        local content = imageParam:match("^.-%s*:%s*(.+)$")
        if content and not imageParam:match("^yt[:%-%s]") and not imageParam:match("^File:") and not imageParam:match("^{{") then
            -- Has a colon AND doesn't start with content syntax, so strip the tab title
            return p.processContent(content, width)
        else
            -- No tab title to strip, process as-is
            return p.processContent(imageParam, width)
        end
    end

    -- Multiple images - build tabber syntax
    local images = {}
    for item in imageParam:gmatch("[^,]+") do
        table.insert(images, item:match("^%s*(.-)%s*$"))  -- trim whitespace
    end

    local tabs = {}
    for i, item in ipairs(images) do
        -- Parse "tab title:content" using : as delimiter
        local tabTitle, content = item:match("^(.-)%s*:%s*(.+)$")
        if not tabTitle then
            -- No : delimiter found, use entire item as content
            content = item
            tabTitle = "Tab " .. i
        end

        -- Trim whitespace
        content = content:match("^%s*(.-)%s*$")
        tabTitle = tabTitle:match("^%s*(.-)%s*$")

        -- Process the content
        content = p.processContent(content, width)

        -- Build tab entry
        table.insert(tabs, "|-|" .. tabTitle .. "=\n" .. content)
    end

    -- Generate tabber content
    local tabberContent = table.concat(tabs, "\n")

    -- Use frame:extensionTag to properly invoke the tabber extension
    local tabberOutput = frame:extensionTag("tabber", tabberContent)

    return tabberOutput
end

function p.processContent(content, width)
    -- Trim whitespace
    content = content:match("^%s*(.-)%s*$")

    -- Extract numeric width value from "350px" format
    local widthNum = width:match("(%d+)")
    if not widthNum then
        widthNum = "350"
    end

    -- Check for shorthand YouTube syntax: yt:VIDEO_ID or yt-VIDEO_ID
    local videoId = content:match("^yt:(.+)$") or content:match("^yt%-(.+)$")
    if videoId then
        videoId = videoId:match("^%s*(.-)%s*$")  -- trim
        return "{{#ev:youtube|" .. videoId .. "|" .. widthNum .. "}}"
    end

    -- Check for YouTube embed that needs width added/replaced
    if content:match("{{#ev:youtube") then
        -- Check if it already has a width parameter
        if content:match("{{#ev:youtube|[^}]+|%d+") then
            -- Has width, replace it
            content = content:gsub("({{#ev:youtube|[^|]+)|%d+", "%1|" .. widthNum)
        else
            -- No width, add it before the closing braces
            content = content:gsub("({{#ev:youtube|[^}]+)(}})", "%1|" .. widthNum .. "%2")
        end
        return content
    end

    -- Check if content is a parser function/extension or HTML (not a plain filename)
    if content:find("<") or content:find("#ev:") or content:find("#tag:") or content:find("UNIQ") or content:find("{{") then
        -- It's special content, return as-is
        return content
    else
        -- Plain filename, wrap in File syntax with frameless to remove spacing
        return "<div style='line-height: 0;'>[[File:" .. content .. "|frameless|" .. width .. "]]</div>"
    end
end

return p