Initial commit

Co-Authored-By: Eric Tuvesson <eric.tuvesson@gmail.com>
Co-Authored-By: mikaeltellhed <2311083+mikaeltellhed@users.noreply.github.com>
Co-Authored-By: kotte <14197736+mrtamagotchi@users.noreply.github.com>
Co-Authored-By: Anders Larsson <64838990+anders-topp@users.noreply.github.com>
Co-Authored-By: Johan  <4934465+joolsus@users.noreply.github.com>
Co-Authored-By: Tore Knudsen <18231882+torekndsn@users.noreply.github.com>
Co-Authored-By: victoratndl <99176179+victoratndl@users.noreply.github.com>

packages/noodl-runtime/src/eventsender.js

@@ -0,0 +1,68 @@
+'use strict';
+
+function EventSender() {
+  this.listeners = {};
+  this.listenersWithRefs = {};
+}
+
+EventSender.prototype.on = function (eventName, callback, ref) {
+  if (ref) {
+    if (!this.listenersWithRefs.hasOwnProperty(eventName)) {
+      this.listenersWithRefs[eventName] = new Map();
+    }
+
+    if (!this.listenersWithRefs[eventName].get(ref)) {
+      this.listenersWithRefs[eventName].set(ref, []);
+    }
+
+    this.listenersWithRefs[eventName].get(ref).push(callback);
+  } else {
+    if (!this.listeners.hasOwnProperty(eventName)) {
+      this.listeners[eventName] = [];
+    }
+
+    this.listeners[eventName].push(callback);
+  }
+};
+
+EventSender.prototype.removeListenersWithRef = function (ref) {
+  Object.keys(this.listenersWithRefs).forEach((eventName) => {
+    const listeners = this.listenersWithRefs[eventName];
+    if (listeners.has(ref)) {
+      listeners.delete(ref);
+    }
+  });
+};
+
+EventSender.prototype.removeAllListeners = function (eventName) {
+  if (eventName) {
+    delete this.listeners[eventName];
+    delete this.listenersWithRefs[eventName];
+  } else {
+    this.listeners = {};
+    this.listenersWithRefs = {};
+  }
+};
+
+EventSender.prototype.emit = async function (eventName, data) {
+  const array = this.listeners[eventName];
+
+  if (array) {
+    for (let i = 0; i < array.length; i++) {
+      const callback = array[i];
+      await Promise.resolve(callback.call(null, data));
+    }
+  }
+
+  const map = this.listenersWithRefs[eventName];
+
+  if (map) {
+    for (const [ref, callbacks] of map) {
+      for (const callback of callbacks) {
+        await Promise.resolve(callback.call(ref, data));
+      }
+    }
+  }
+};
+
+module.exports = EventSender;