Revert "Temporarily remove socketio until this can be fixed"

This reverts commit 0e1d35c8a0.

resources/assets/scripts/mixins/socketio/emitter.ts

@@ -0,0 +1,59 @@
+import {isFunction} from 'lodash';
+import {ComponentOptions} from "vue";
+import {Vue} from "vue/types/vue";
+
+export default new class SocketEmitter {
+    listeners: Map<string | number, Array<{
+        callback: (a: ComponentOptions<Vue>) => void,
+        vm: ComponentOptions<Vue>,
+    }>>;
+
+    constructor() {
+        this.listeners = new Map();
+    }
+
+    /**
+     * Add an event listener for socket events.
+     */
+    addListener(event: string | number, callback: (data: any) => void, vm: ComponentOptions<Vue>) {
+        if (!isFunction(callback)) {
+            return;
+        }
+
+        if (!this.listeners.has(event)) {
+            this.listeners.set(event, []);
+        }
+
+        // @ts-ignore
+        this.listeners.get(event).push({callback, vm});
+    }
+
+    /**
+     * Remove an event listener for socket events based on the context passed through.
+     */
+    removeListener(event: string | number, callback: (data: any) => void, vm: ComponentOptions<Vue>) {
+        if (!isFunction(callback) || !this.listeners.has(event)) {
+            return;
+        }
+
+        // @ts-ignore
+        const filtered = this.listeners.get(event).filter((listener) => {
+            return listener.callback !== callback || listener.vm !== vm;
+        });
+
+        if (filtered.length > 0) {
+            this.listeners.set(event, filtered);
+        } else {
+            this.listeners.delete(event);
+        }
+    }
+
+    /**
+     * Emit a socket event.
+     */
+    emit(event: string | number, ...args: any) {
+        (this.listeners.get(event) || []).forEach((listener) => {
+            listener.callback.call(listener.vm, args);
+        });
+    }
+}