client-side structure

1 files changed, 26 insertions, 0 deletions

diff --git a/web/src/js/stores/base.es6.js b/web/src/js/stores/base.es6.js
new file mode 100644
index 00000000..9e9c69aa
--- /dev/null
+++ b/web/src/js/stores/base.es6.js
@@ -0,0 +1,26 @@
+class EventEmitter {
+	constructor() {
+		this.listeners = {};
+	}
+	emit(event) {
+		if (!(event in this.listeners)) {
+			return;
+		}
+		this.listeners[event].forEach(function(listener) {
+			listener(event, this);
+		}.bind(this));
+	}
+	addListener(event, f) {
+		this.listeners[event] = this.listeners[event] || [];
+		this.listeners[event].push(f);
+	}
+	removeListener(event, f) {
+		if (!(event in this.listeners)) {
+			return false;
+		}
+		var index = this.listeners[event].indexOf(f);
+		if (index >= 0) {
+			this.listeners[event].splice(index, 1);
+		}
+	}
+}
\ No newline at end of file