From 2071512b202887c8ea28b77ca9c3c24c246dcb8c Mon Sep 17 00:00:00 2001
From: Mark Nadal <mark@accelsor.com>
Date: Sat, 27 Apr 2019 00:16:12 -0700
Subject: [PATCH] add health stats

---
 lib/server.js |  1 +
 lib/stats.js  | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 lib/stats.js

diff --git a/lib/server.js b/lib/server.js
index 509af9e5..90159bd0 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -17,6 +17,7 @@
 	require('./file');
 	require('./evict');
 	require('./multicast');
+	require('./stats');
 	if('debug' === process.env.GUN_ENV){ require('./debug') }
 	module.exports = Gun;
 }());
diff --git a/lib/stats.js b/lib/stats.js
new file mode 100644
index 00000000..40c9be4f
--- /dev/null
+++ b/lib/stats.js
@@ -0,0 +1,43 @@
+var Gun = (typeof window !== "undefined")? window.Gun : require('../gun');
+
+Gun.on('opt', function(root){
+	this.to.next(root);
+	if(root.once){ return }
+	if(typeof process === 'undefined'){ return }
+	if(typeof require === 'undefined'){ return }
+	var noop = function(){};
+	var os = require('os') || {};
+	var fs = require('fs') || {};
+	fs.existsSync = fs.existsSync || require('path').existsSync;
+	if(!fs.existsSync){ return }
+	if(!process){ return }
+	process.uptime = process.uptime || noop;
+	process.cpuUsage = process.cpuUsage || noop;
+	process.memoryUsage = process.memoryUsage || noop;
+	os.totalmem = os.totalmem || noop;
+	os.freemem = os.freemem || noop;
+	os.loadavg = os.loadavg || noop;
+	os.cpus = os.cpus || noop;
+	setTimeout(function(){
+		root.stats = Gun.obj.ify((fs.existsSync(__dirname+'/../stats.'+root.opt.file) && fs.readFileSync(__dirname+'/../stats.'+root.opt.file).toString())) || {};
+		root.stats.up = root.stats.up || {};
+		root.stats.up.start = root.stats.up.start || +(new Date);
+		root.stats.up.count = (root.stats.up.count || 0) + 1;
+	},1);
+	setInterval(function(){
+		if(!root.stats){ return }
+		var stats = root.stats, tmp;
+		(stats.up||{}).time = process.uptime();
+		stats.memory = process.memoryUsage() || {};
+		stats.memory.totalmem = os.totalmem();
+		stats.memory.freemem = os.freemem();
+		stats.cpu = process.cpuUsage() || {};
+		stats.cpu.loadavg = os.loadavg();
+		stats.peers = {};
+		stats.peers.count = Object.keys(root.opt.peers||{}).length;
+		stats.node = {};
+		stats.node.count = Object.keys(root.graph||{}).length;
+		fs.writeFile(__dirname+'/../stats.'+root.opt.file, JSON.stringify(stats, null, 2), function(err){});
+	}, 1000 * 15);
+	Object.keys = Object.keys || function(o){ return Gun.obj.map(o, function(v,k,t){t(k)}) }
+});
\ No newline at end of file