added check for old inactive nodes

models/collection.js

@@ -115,9 +115,34 @@ Collection.prototype.getNodeOrNew = function(search, data)
 
 Collection.prototype.all = function()
 {
+	this.removeOldNodes();
+
 	return this._items;
 }
 
+Collection.prototype.removeOldNodes = function()
+{
+	var deleteList = []
+
+	for(var i = this._items.length - 1; i >= 0; i--)
+	{
+		var node = this._items[i];
+
+		if( node.isInactiveAndOld() )
+		{
+			deleteList.push(i);
+		}
+	}
+
+	if(deleteList.length > 0)
+	{
+		for(var i = 0; i < deleteList.length; i++)
+		{
+			this._items.splice(deleteList[i], 1);
+		}
+	}
+}
+
 Collection.prototype.blockPropagationChart = function()
 {
 	return this._blockchain.getBlockPropagation();

models/node.js

@@ -2,6 +2,7 @@ var geoip = require('geoip-lite');
 var _ = require('lodash');
 
 var MAX_HISTORY = 40;
+var MAX_INACTIVE_TIME = 1000;
 
 var Node = function Node(data)
 {
@@ -180,4 +181,20 @@ Node.prototype.canUpdate = function()
 	return this.info.canUpdateHistory || false;
 }
 
+Node.prototype.isInactiveAndOld = function()
+{
+	if(this.stats.active)
+		return false;
+
+	var lastState = this.uptime.history[this.uptime.history.length -1];
+
+	if( !_.isUndefined(lastState) && !_.isUndefined(lastState.status) && !_.isUndefined(lastState.time) )
+	{
+		if( lastState.status === 'down' && (_.now() - lastState.time) > MAX_INACTIVE_TIME )
+			return true;
+	}
+
+	return false;
+}
+
 module.exports = Node;