Module:SummarySnippet

Documentation for this module may be created at Module:SummarySnippet/doc

local p = {}

-- Trims whitespace from a string
local function trim(s)
	return s:match("^%s*(.-)%s*$")
end

function p.fromPage(frame)
	local page = frame.args[1]
	local length = tonumber(frame.args[2]) or 150

	if not page or page == '' then
		return "No page name provided."
	end

	-- Parse input: extract page name from link-style input if needed
	local raw = mw.ustring.match(page, "%[%[(.-)%]%]") or page
	local pageText = mw.text.split(raw, "|")[1]

	local content = mw.title.new(pageText)
	if not content or not content.exists then
		return "Page not found: " .. pageText
	end

	local text = content:getContent()
	if not text then
		return "No content."
	end
	
	-- Strip templates and most formatting (basic)
	text = mw.text.killMarkers(text)
	text = mw.ustring.gsub(text, '{{.-}}', '') -- remove templates
	text = mw.ustring.gsub(text, '%[%[.-%|', '') -- remove link alt text
	text = mw.ustring.gsub(text, '%[%[', '') -- remove opening brackets
	text = mw.ustring.gsub(text, '%]%]', '') -- remove closing brackets
	text = mw.ustring.gsub(text, "''+", "") -- remove italics/bold
	text = mw.ustring.gsub(text, "=+%s*(.-)%s*=+", "") -- remove headers
	
	-- Collapse whitespace
	text = text:gsub("\n", " ")
	text = text:gsub("%s+", " ")
	text = trim(text)
	
	-- Handle empty content after cleanup
	if text == "" then
		return "No description available."
	end

	-- Tag on a snippet-text class otherwise size gets overwritten and tack on a final read more
	local link = string.format(" [[:%s|Read more]]", pageText)
	return string.format('<span class="snippet-text">%s... %s</span>', mw.text.nowiki(text), link)

end

return p