Stepper integration impl (#955)

src/globalState.ts

@@ -1,7 +1,42 @@
-import {Service} from "./call_service";
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {Service} from "./callService";
+import {Particle} from "./particle";
 
 // TODO put state with wasm file in each created FluenceClient
 let services: Map<string, Service> = new Map();
+let particlesQueue: Particle[] = [];
+let currentParticle: string | undefined = undefined;
+
+export function getCurrentParticleId(): string | undefined {
+    return currentParticle;
+}
+
+export function setCurrentParticleId(particle: string | undefined) {
+    currentParticle = particle;
+}
+
+export function addParticle(particle: Particle): void {
+    particlesQueue.push(particle);
+}
+
+export function popParticle(): Particle | undefined {
+    return particlesQueue.pop();
+}
 
 export function registerService(service: Service) {
     services.set(service.serviceId, service)