universal notification system

lib/axe.js

@@ -238,7 +238,36 @@ function start(root){
 		});
 
 	}());
-}
+
+	;(function(){ // THIS IS THE UNIVERSAL NOTIFICATION MODULE
+		var to = {}, key = {}, email = require('./email');
+		if(email.err){ return }
+		mesh.hear['tag'] = function(msg, peer, who){
+			if(who = key[msg.key]){ who.rate = Math.max(msg.rate||1000*60*15, 1000*60); return }
+			if(!msg.src || !msg.email){ return }
+			if(+new Date < peer.emailed + 1000*60*2){ mesh.say({dam:'tag',err:'too fast'},peer); return } // peer can only send notifications > 2min
+			var src; try{ src = new URL(msg.src = msg.src.split(/\s/)[0]); } catch(e){ return } // throws if invalid URL.
+			(who = (to[msg.email] = to[msg.email] || {go:{}})).go[''+src] = 1; // we're keeping in-memory for now, maybe will "stay" to disk in future.
+			peer.emailed = +new Date;
+			if(who.batch){ return }
+			key[who.key = Math.random().toString(36).slice(2)] = who;
+			who.batch = setTimeout(function(){
+				email.send({
+					from: process.env.EMAIL,
+					to: msg.email,
+					subject: "Notification:",
+					text: 'Someone or a bot tagged you at: (⚠️ only click link if you recognize & trust it ⚠️)\n'+
+						'[use #'+who.key+' to unsubscribe please mute this thread by tapping the top most "⋮" button and clicking mute]\n\n' +
+						Object.keys(who.go).join('\n'), // TODO: NEEDS TO BE CPU SCHEDULED
+					headers: {'message-id': '<[email protected]>'} // hardcode id so all batches also group into the same email thread to reduce clutter.
+				}, function(err, r){
+					who.batch = null; who.go = {};
+					err && console.log("email TAG:", err);
+				});
+			}, who.rate || (1000*60*60*24)); // default to 1 day
+		};
+	}());
+};
 
 ;(function(){
 	var from = Array.from;

lib/wire.js

@@ -67,6 +67,7 @@ Gun.on('opt', function (root) {
 	ws.noServer = true;//workaround for ws.path
 	ws.web = ws.web || new opt.WebSocket.Server(ws);
 	opt.web.on('upgrade', (req, socket, head) => {
+		opt.web.host = opt.web.host || (req.headers||'').origin || (req.headers||'').host; 
 		if (req.url == ws.path) {
 			ws.web.handleUpgrade(req, socket, head, function done(ws) {
 				open(ws, req);