minwe · October 22, 2019 03:03 · May 6, 2014
diff --git a/EventSystem.js b/EventSystem.js
@@ -0,0 +1,28 @@
+var EventSystem = (function() {
+  var self = this;
+
+  self.queue = {};
+
+  return {
+    publish: function (event, data) {
+      var queue = self.queue[event];
+
+      if (typeof queue === 'undefined') {
+        return false;
+      }
+
+      while(queue.length > 0) {
+        (queue.shift())(data);
+      }
+
+      return true;
+    },
+    subscribe: function(event, callback) {
+      if (typeof self.queue[event] === 'undefined') {
+        self.queue[event] = [];
+      }
+
+      self.queue[event].push(callback);
+    }
+  };
+}());
diff --git a/sample-usage-to-publish.js b/sample-usage-to-publish.js
@@ -0,0 +1,12 @@
+var RiskList = React.createClass({
+  getInitialState: function() {
+    return { risks: [] };
+  },
+  componentDidMount: function() {
+    // someting
+  },
+  render: function() {
+    EventSystem.publish('risk.count.update', this.state.risks.length);
+    // something
+  }
+}
diff --git a/sample-usage-to-subscribe.js b/sample-usage-to-subscribe.js
@@ -0,0 +1,20 @@
+var RiskPage = React.createClass({
+  updateRiskCount: function(count) {
+    this.setState({
+      riskCount: count
+    });
+  },
+  componentDidMount: function() {
+    EventSystem.subscribe('risk.count.update', this.updateRiskCount);
+  },
+  getInitialState: function() {
+    return {
+      riskCount: 0
+    };
+  },
+  render: function() {
+    // something
+  }
+});
+
+