added miners chart

lib/node.js

@@ -76,6 +76,7 @@ function Node()
 		txDensity: [],
 		blockTimes: [],
 		gasSpending: [],
+		miners: [],
 		uptime: 0,
 		errors: []
 	};
@@ -235,6 +236,7 @@ Node.prototype.getLatestBlocks = function()
 	this.stats.difficulty = this.difficultyChart();
 	this.stats.txDensity = this.txDensityChart();
 	this.stats.gasSpending = this.gasSpendingChart();
+	this.stats.miners = this.minersChart();
 }
 
 Node.prototype.addBlockHistory = function(block)
@@ -297,6 +299,22 @@ Node.prototype.gasSpendingChart = function()
 	});
 }
 
+Node.prototype.minersChart = function()
+{
+	var miners = _.countBy(this.blocks, function(block)
+	{
+		return block.miner;
+	});
+
+	var minersArray = [];
+
+	_.forEach(miners, function(cnt, miner) {
+		minersArray.push({miner: miner, blocks: cnt});
+	});
+
+	return _.sortBy(minersArray, 'blocks').reverse();
+}
+
 Node.prototype.uptime = function()
 {
 	this.stats.uptime = ((this._tries - this._down) / this._tries) * 100;