-- HTTP Access to PEP -> microblog

-- By Kim Alvefur <zash@zash.se>

local mod_pep = module:depends"pep";

local um = require "core.usermanager";

local nodeprep = require "util.encodings".stringprep.nodeprep;

local st = require "util.stanza";

local urlencode = require "util.http".urlencode;

module:depends("http")

module:provides("http", {

	route = {

		["GET /*"] = function (event, user)

			if user == "" then

				return [[<h1>Hello from mod_atom</h1><p>This module provides access to public microblogs of local users.</p>]];

			end;

			local request, response = event.request, event.response;

			local actor = request.ip;

			local prepped = nodeprep(user);

			if not prepped then return 400; end

			if prepped ~= user then

				response.headers.location = module:http_url() .. "/" .. urlencode(prepped);

				return 302;

			end

			if not um.user_exists(user, module.host) then

				return 404;

			end

			local pubsub_service = mod_pep.get_pep_service(user);

			local ok, items = pubsub_service:get_items("urn:xmpp:microblog:0", actor);

			if ok then

				response.headers.content_type = "application/xml";

				local feed = st.stanza("feed", { xmlns = "http://www.w3.org/2005/Atom" })

					:text_tag("generator", "Prosody", { uri = "xmpp:prosody.im", version = prosody.version })

					:text_tag("title", pubsub_service.nodes["urn:xmpp:microblog:0"].config.title or "Microblog feed")

					:text_tag("subtitle", pubsub_service.nodes["urn:xmpp:microblog:0"].config.description)

					:tag("author")

						:text_tag("name", user)

						:text_tag("preferredUsername", user, { xmlns = "http://portablecontacts.net/spec/1.0" });

				local ok, _, nick = pubsub_service:get_last_item("http://jabber.org/protocol/nick", actor);

				if ok and nick then

					feed:text_tag("displayName", nick.tags[1][1], { xmlns = "http://portablecontacts.net/spec/1.0" });

				end

				feed:reset();

				for i = #items, 1, -1 do

					feed:add_direct_child(items[items[i]].tags[1]);

				end

				return tostring(feed);

			elseif items == "forbidden" then

				return 403;

			elseif items == "item-not-found" then

				return 404;

			end

		end;

	}

});