-- No, not trying to parse HTML here. It's an illusion. Just trying to read RSS feeds.

--

-- Compose a textual representation of Atom payloads

module:hook("pubsub-summary/http://www.w3.org/2005/Atom", function (event)

	local payload = event.payload;

	local title = payload:get_child_text("title");

	if title then title = title:gsub("^%s+", ""):gsub("%s+$", ""); end

	-- Note: This prefers content over summary, it was made for a news feed where

	-- the interesting stuff was in the content and the summary was .. meh.

	local content_tag = payload:get_child("content") or payload:get_child("summary");

	local content = content_tag and content_tag:get_text();

	if content and content_tag.attr.type == "html" then

		content = content:gsub("\n*<p[^>]*>\n*(.-)\n*</p>\n*", "%1\n\n");

		content = content:gsub("<li>(.-)</li>\n", "* %1\n");

		content = content:gsub("<a[^>]*href=[\"'](.-)[\"'][^>]*>(.-)</a>", "\1%1\2%2\3");

		content = content:gsub("<b>(.-)</b>", "*%1*");

		content = content:gsub("<strong>(.-)</strong>", "*%1*");

		content = content:gsub("<em>(.-)</em>", "_%1_");

		content = content:gsub("<i>(.-)</i>", "_%1_");

		content = content:gsub("<img[^>]*src=[\"'](.-)[\"'][^>]*>", " %1 "); -- TODO alt= would have been nice to grab

		content = content:gsub("<br[^>]*>", "\n");

		content = content:gsub("<[^>]+>", "");

		content = content:gsub("\1(.-)\2(.-)\3", "%2 <%1>");

		content = content:gsub("^%s*", ""):gsub("%s*$", "");

		content = content:gsub("\n\n\n+", "\n\n");

		content = content:gsub("&(%w+);", {

				apos = "'";

				quot = '"';

				lt = "<";

				gt = ">";

				amp = "&";

				nbsp = "\194\160"; -- U+00A0

			});

	end

	local summary;

	if title and content and content:sub(1, #title) ~= title then

		summary = "*" .. title .. "*\n\n" .. content;

	elseif title or content then

		summary = content or title;

	end

	for link in payload:childtags("link") do

		if link and link.attr.href and link.attr.href ~= content then

			summary = (summary and summary .. "\n" or "") .. link.attr.href;

			if link.attr.rel and link.attr.rel ~= "alternate" then summary = summary .. " [" .. link.attr.rel .. "]" end

		end

	end

	for area in payload:childtags("area", "urn:oasis:names:tc:emergency:cap:1.2") do

		local pos = area:get_child_text("circle");

		if pos then

			summary = summary .. "\n" .. "geo:"..pos:match("[%d.,]+");

		end

	end

	return summary;

end, 1);