1 files changed, 113 insertions, 0 deletions
diff --git a/packages/instant/src/util/heap.ts b/packages/instant/src/util/heap.ts
new file mode 100644
index 000000000..78ec3b3cc
--- /dev/null
+++ b/packages/instant/src/util/heap.ts
@@ -0,0 +1,113 @@
+import { ObjectMap } from '@0x/types';
+import { logUtils } from '@0x/utils';
+import * as _ from 'lodash';
+
+import { HEAP_ANALYTICS_ID } from '../constants';
+
+import { AnalyticsEventOptions, AnalyticsUserOptions } from './analytics';
+
+export interface HeapAnalytics {
+    loaded: boolean;
+    appid: string;
+    identify(id: string, idType: string): void;
+    track(eventName: string, eventProperties?: ObjectMap<string | number>): void;
+    resetIdentity(): void;
+    addUserProperties(properties: AnalyticsUserOptions): void;
+    addEventProperties(properties: AnalyticsEventOptions): void;
+    removeEventProperty(property: string): void;
+    clearEventProperties(): void;
+}
+interface ModifiedWindow {
+    heap?: HeapAnalytics;
+    zeroExInstantLoadedHeap?: boolean;
+}
+const getWindow = (): ModifiedWindow => {
+    return window as ModifiedWindow;
+};
+
+const setupZeroExInstantHeap = () => {
+    if (_.isUndefined(HEAP_ANALYTICS_ID)) {
+        return;
+    }
+
+    const curWindow = getWindow();
+    // Set property to specify that this is zeroEx's heap
+    curWindow.zeroExInstantLoadedHeap = true;
+
+    // Typescript-compatible version of https://docs.heapanalytics.com/docs/installation
+    /* tslint:disable */
+    ((window as any).heap = (window as any).heap || []),
+        ((window as any).heap.load = function(e: any, t: any) {
+            ((window as any).heap.appid = e), ((window as any).heap.config = t = t || {});
+            var r = t.forceSSL || 'https:' === (document.location as Location).protocol,
+                a = document.createElement('script');
+            (a.type = 'text/javascript'),
+                (a.async = !0),
+                (a.src = (r ? 'https:' : 'http:') + '//cdn.heapanalytics.com/js/heap-' + e + '.js');
+            var n = document.getElementsByTagName('script')[0];
+            (n.parentNode as Node).insertBefore(a, n);
+            for (
+                var o = function(e: any) {
+                        return function() {
+                            (window as any).heap.push([e].concat(Array.prototype.slice.call(arguments, 0)));
+                        };
+                    },
+                    p = [
+                        'addEventProperties',
+                        'addUserProperties',
+                        'clearEventProperties',
+                        'identify',
+                        'resetIdentity',
+                        'removeEventProperty',
+                        'setEventProperties',
+                        'track',
+                        'unsetEventProperty',
+                    ],
+                    c = 0;
+                c < p.length;
+                c++
+            )
+                (window as any).heap[p[c]] = o(p[c]);
+        });
+    (window as any).heap.load(HEAP_ANALYTICS_ID);
+    /* tslint:enable */
+
+    return curWindow.heap as HeapAnalytics;
+};
+
+export const heapUtil = {
+    getHeap: (): HeapAnalytics | undefined => {
+        const curWindow = getWindow();
+        const hasOtherExistingHeapIntegration = curWindow.heap && !curWindow.zeroExInstantLoadedHeap;
+        if (hasOtherExistingHeapIntegration) {
+            return undefined;
+        }
+
+        const zeroExInstantHeapIntegration = curWindow.zeroExInstantLoadedHeap && curWindow.heap;
+        if (zeroExInstantHeapIntegration) {
+            return zeroExInstantHeapIntegration;
+        }
+
+        return setupZeroExInstantHeap();
+    },
+    evaluateHeapCall: (heapFunctionCall: (heap: HeapAnalytics) => void): void => {
+        if (_.isUndefined(HEAP_ANALYTICS_ID)) {
+            return;
+        }
+
+        const curHeap = heapUtil.getHeap();
+        if (curHeap) {
+            try {
+                if (curHeap.appid !== HEAP_ANALYTICS_ID) {
+                    // Integrator has included heap after us and reset the app id
+                    return;
+                }
+                heapFunctionCall(curHeap);
+            } catch (e) {
+                // We never want analytics to crash our React component
+                // TODO(sk): error reporter here
+                logUtils.log('Analytics error', e);
+            }
+        }
+    },
+};