4 files changed, 391 insertions, 0 deletions
diff --git a/src/base-pubsub.spec.ts b/src/base-pubsub.spec.ts
new file mode 100644
index 0000000..5737b18
--- /dev/null
+++ b/src/base-pubsub.spec.ts
@@ -0,0 +1,183 @@
+declare const window: Window;
+
+import {BasePubSub} from './base-pubsub';
+
+describe('BasePubSub Tests', () => {
+    let basePubSub: BasePubSub;
+
+    let testSub: string = 'testSub';
+    let testWindow = window;
+    let testSubUrl: string = 'http://127.0.0.1';
+
+    beforeEach(() => {
+        basePubSub = new BasePubSub('testId');
+    });
+
+    describe('constructor tests', () => {
+        it('should init class property', () => {
+            expect(basePubSub.subscribers.size).toBe(0);
+            expect(basePubSub.eventsCallbacks.length).toBe(0);
+            expect(basePubSub.eventsToWait.size).toBe(0);
+            expect(basePubSub.clientId).toBe('testId');
+            expect(basePubSub.lastEventNotified).toBe('');
+        });
+    });
+
+    describe('register function tests', () => {
+
+        it('Should add new subscriber with the sent url to subscribers array ' +
+            'when calling register function with url', () => {
+            basePubSub.register(testSub, testWindow, testSubUrl);
+
+            let actualSub = basePubSub.subscribers.get(testSub);
+
+            expect(basePubSub.subscribers.size).toBe(1);
+            expect(actualSub.window).toBe(testWindow);
+            expect(actualSub.locationUrl).toBe(testSubUrl);
+        });
+
+        it('Should add new subscriber with the window location.href to subscribers array ' +
+            'when calling register function without url', () => {
+            basePubSub.register(testSub, testWindow, undefined);
+
+            let actualSub = basePubSub.subscribers.get(testSub);
+
+            expect(basePubSub.subscribers.size).toBe(1);
+            expect(actualSub.window).toBe(testWindow);
+            expect(actualSub.locationUrl).toBe(window.location.href);
+        });
+    });
+
+    describe('unregister function tests', () => {
+
+        it('Should remove subscriber from subscribers list', () => {
+            basePubSub.register(testSub, testWindow, testSubUrl);
+
+            expect(basePubSub.subscribers.size).toBe(1);
+
+            basePubSub.unregister(testSub);
+
+            expect(basePubSub.subscribers.size).toBe(0);
+        });
+    });
+
+    describe('on function tests', () => {
+        let callback = () => {return true};
+
+        it('Should add new callback to events callback array', () => {
+            basePubSub.on(callback);
+
+            expect(basePubSub.eventsCallbacks.length).toBe(1);
+
+            let actualCallback = basePubSub.eventsCallbacks[0];
+
+            expect(actualCallback).toBe(callback);
+        });
+
+        it('Should not add callback to events callback array if it already exists', () => {
+            basePubSub.on(callback);
+
+            expect(basePubSub.eventsCallbacks.length).toBe(1);
+
+            basePubSub.on(callback);
+
+            expect(basePubSub.eventsCallbacks.length).toBe(1);
+        });
+    });
+
+    describe('off function tests', () => {
+        let callback = () => {return true};
+
+        it('Should remove callback from events callback array', () => {
+            basePubSub.on(callback);
+
+            expect(basePubSub.eventsCallbacks.length).toBe(1);
+
+            basePubSub.off(callback);
+
+            expect(basePubSub.eventsCallbacks.length).toBe(0);
+        });
+    });
+
+    describe('isWaitingForEvent function tests', () => {
+        let eventsMap = new Map<string, Array<string>>();
+        eventsMap.set('eventsKey', ['WINDOW_OUT']);
+
+        beforeEach(() => {
+            basePubSub.eventsToWait = eventsMap;
+        });
+
+        it('Should return true when the event is found in the events to wait array', () => {
+            let isWaiting = basePubSub.isWaitingForEvent('WINDOW_OUT');
+
+            expect(isWaiting).toBeTruthy();
+        });
+
+        it('Should return false when the event is not found in the events to wait array', () => {
+            let isWaiting = basePubSub.isWaitingForEvent('CHECK_IN');
+
+            expect(isWaiting).toBeFalsy();
+        });
+    });
+
+    describe('notify function tests', () => {
+        let eventType: string = 'CHECK_IN';
+        let callback;
+        beforeEach(() => {
+             callback = jest.fn();
+        });
+
+        it('should only update the last event notified property when no subscribers registered', () => {
+            basePubSub.notify(eventType);
+
+            expect(basePubSub.lastEventNotified).toBe(eventType);
+        });
+
+        it('should call post message with the right parameters when there are subscribers registered', () => {
+            testWindow.postMessage = jest.fn();
+            basePubSub.register(testSub, testWindow, testSubUrl);
+            basePubSub.notify(eventType);
+
+            let sub = basePubSub.subscribers.get(testSub);
+
+            let eventObj = {
+                type: eventType,
+                data: undefined,
+                originId: basePubSub.clientId
+            };
+
+            expect(sub.window.postMessage).toHaveBeenCalledWith(eventObj, sub.locationUrl);
+        });
+
+        it('should execute the callback function when calling notify with subscription function with no subscribers', () => {
+            let callback = jest.fn();
+
+            basePubSub.notify(eventType).subscribe(callback);
+
+            expect(callback).toHaveBeenCalled();
+        });
+
+        it('should execute the callback function when calling notify with subscription function ' +
+            'with connected subscribers after all been notified', () => {
+            basePubSub.register(testSub, testWindow, testSubUrl);
+
+            basePubSub.notify(eventType).subscribe(callback);
+
+            expect(callback).toHaveBeenCalled();
+        });
+
+        it('should register an action completed function to pub sub when an event that is in the events to wait list ' +
+            'is being fired', () => {
+            let eventsMap = new Map<string, Array<string>>();
+            eventsMap.set(testSub, ['CHECK_IN']);
+            basePubSub.on = jest.fn();
+
+            basePubSub.register(testSub, testWindow, testSubUrl);
+            basePubSub.eventsToWait = eventsMap;
+
+            basePubSub.notify(eventType).subscribe(callback);
+
+            expect(basePubSub.on).toHaveBeenCalled();
+        });
+    })
+});
+\ No newline at end of file
diff --git a/src/base-pubsub.ts b/src/base-pubsub.ts
new file mode 100644
index 0000000..36b959a
--- /dev/null
+++ b/src/base-pubsub.ts
@@ -0,0 +1,126 @@
+declare const window: Window;
+
+export class BasePubSub {
+
+    subscribers: Map<string, ISubscriber>;
+    eventsCallbacks: Function[];
+    clientId: string;
+    eventsToWait: Map<string, string[]>;
+    lastEventNotified: string;
+
+    constructor(pluginId: string) {
+        this.subscribers = new Map<string, ISubscriber>();
+        this.eventsCallbacks = [];
+        this.eventsToWait = new Map<string, string[]>();
+        this.clientId = pluginId;
+        this.lastEventNotified = '';
+        this.onMessage = this.onMessage.bind(this);
+
+        window.addEventListener('message', this.onMessage);
+    }
+
+    public register(subscriberId: string, subscriberWindow: Window, subscriberUrl: string) {
+        const subscriber = {
+            window: subscriberWindow,
+            locationUrl: subscriberUrl || subscriberWindow.location.href
+        } as ISubscriber;
+
+        this.subscribers.set(subscriberId, subscriber);
+    }
+
+    public unregister(subscriberId: string) {
+        this.subscribers.delete(subscriberId);
+    }
+
+    public on(callback: Function) {
+        const functionExists = this.eventsCallbacks.find((func: Function) => {
+            return callback.toString() === func.toString();
+        });
+
+        if (!functionExists) {
+            this.eventsCallbacks.push(callback);
+        }
+    }
+
+    public off(callback: Function) {
+        const index = this.eventsCallbacks.indexOf(callback);
+        this.eventsCallbacks.splice(index, 1);
+    }
+
+    public notify(eventType: string, eventData?: any) {
+        const eventObj = {
+            type: eventType,
+            data: eventData,
+            originId: this.clientId
+        } as IPubSubEvent;
+
+        this.subscribers.forEach( (subscriber: ISubscriber, subscriberId: string) => {
+            subscriber.window.postMessage(eventObj, subscriber.locationUrl);
+        });
+
+        this.lastEventNotified = eventType;
+
+        return {
+            subscribe: function(callbackFn) {
+
+                if (this.subscribers.size !== 0) {
+                    const subscribersToNotify = Array.from(this.subscribers.keys());
+
+                    const checkNotifyComplete = (subscriberId: string) => {
+
+                        const index = subscribersToNotify.indexOf(subscriberId);
+                        subscribersToNotify.splice(index, 1);
+
+                        if (subscribersToNotify.length === 0) {
+                            callbackFn();
+                        }
+                    };
+
+                    this.subscribers.forEach((subscriber: ISubscriber, subscriberId: string) => {
+                        if (this.eventsToWait.has(subscriberId) &&
+                            this.eventsToWait.get(subscriberId).indexOf(eventType) !== -1) {
+
+                            const actionCompletedFunction = (actionCompletedEventData, subId = subscriberId) => {
+                                if (actionCompletedEventData.type === 'ACTION_COMPLETED') {
+                                    checkNotifyComplete(subId);
+                                }
+                                this.off(actionCompletedFunction);
+
+                            };
+                            this.on(actionCompletedFunction);
+                        } else {
+                            checkNotifyComplete(subscriberId);
+                        }
+                    });
+                } else {
+                    callbackFn();
+                }
+            }.bind(this)
+        };
+    }
+
+    public isWaitingForEvent(eventName: string): boolean {
+        return Array.from(this.eventsToWait.values()).some((eventsList: string[]) =>
+            eventsList.indexOf(eventName) !== -1
+        );
+    }
+
+    protected onMessage(event: any) {
+        if (this.subscribers.has(event.data.originId)) {
+            this.eventsCallbacks.forEach((callback: Function) => {
+                callback(event.data, event);
+            });
+        }
+    }
+}
+
+export interface IPubSubEvent {
+    type: string;
+    originId: string;
+    data: any;
+}
+
+export interface ISubscriber {
+    window: Window;
+    locationUrl: string;
+}
diff --git a/src/plugin-pubsub.ts b/src/plugin-pubsub.ts
new file mode 100644
index 0000000..ec4afb2
--- /dev/null
+++ b/src/plugin-pubsub.ts
@@ -0,0 +1,29 @@
+import { BasePubSub } from './base-pubsub';
+
+declare const window: Window;
+
+export class PluginPubSub extends BasePubSub {
+
+    constructor(pluginId: string, parentUrl: string, eventsToWait?: string[]) {
+        super(pluginId);
+        this.register('sdc-hub', window.parent, parentUrl);
+        this.subscribe(eventsToWait);
+    }
+
+    public subscribe(eventsToWait?: string[]) {
+        const registerData = {
+            pluginId: this.clientId,
+            eventsToWait: eventsToWait || []
+        };
+
+        this.notify('PLUGIN_REGISTER', registerData);
+    }
+
+    public unsubscribe() {
+        const unregisterData = {
+            pluginId: this.clientId
+        };
+
+        this.notify('PLUGIN_UNREGISTER', unregisterData);
+    }
+}
diff --git a/src/plugin-pubusb.spec.ts b/src/plugin-pubusb.spec.ts
new file mode 100644
index 0000000..1eb6eda
--- /dev/null
+++ b/src/plugin-pubusb.spec.ts
@@ -0,0 +1,53 @@
+import {PluginPubSub} from './plugin-pubsub';
+
+declare const window: Window;
+
+describe('BasePubSub Tests', () => {
+    let pluginPubSub: PluginPubSub;
+
+    let testSub: string = 'testSub';
+    let testParentUrl: string = 'http://127.0.0.1';
+    let testEventsToWait: Array<string> = ['CHECK_IN', 'WINDOW_OUT'];
+
+    beforeEach(() => {
+       pluginPubSub = new PluginPubSub(testSub, testParentUrl, testEventsToWait);
+    });
+
+    describe('constructor tests', () => {
+        it('should init class property', () => {
+            expect(pluginPubSub.subscribers.size).toBe(1);
+            expect(pluginPubSub.eventsCallbacks.length).toBe(0);
+            expect(pluginPubSub.eventsToWait.size).toBe(0);
+            expect(pluginPubSub.clientId).toBe('testSub');
+        });
+    });
+
+    describe('subscribe function tests', () => {
+        it('should call notify function with the PLUGIN_REGISTER event and the register data', () => {
+            pluginPubSub.notify = jest.fn();
+
+            let wantedRegisterData = {
+                pluginId: testSub,
+                eventsToWait: []
+            };
+
+            pluginPubSub.subscribe();
+
+            expect(pluginPubSub.notify).toHaveBeenCalledWith('PLUGIN_REGISTER', wantedRegisterData);
+        })
+    });
+
+    describe('unsubscribe function tests', () => {
+        it('should call notify function with the PLUGIN_UNREGISTER event and the unregister data', () => {
+            pluginPubSub.notify = jest.fn();
+
+            let wantedUnregisterData = {
+                pluginId: testSub,
+            };
+
+            pluginPubSub.unsubscribe();
+
+            expect(pluginPubSub.notify).toHaveBeenCalledWith('PLUGIN_UNREGISTER', wantedUnregisterData);
+        })
+    });
+});
+\ No newline at end of file