feat(trigger/pubsub): Suggest subscriptions from echo configuration.

app/scripts/modules/core/src/index.ts

@@ -45,6 +45,7 @@ export * from './overrideRegistry';
 export * from './pageTitle';
 export * from './pipeline';
 export * from './presentation';
+export * from './pubsub';
 
 export * from './reactShims';
 export * from './retry';

app/scripts/modules/core/src/pipeline/config/triggers/pubsub/pubsub.trigger.ts

@@ -1,19 +1,29 @@
 import { IController, module } from 'angular';
 
 import { PIPELINE_CONFIG_PROVIDER, PipelineConfigProvider } from 'core/pipeline/config/pipelineConfigProvider';
-import { IPubsubTrigger } from '@spinnaker/core';
+import {
+  IPubsubTrigger,
+  PUBSUB_SUBSCRIPTION_SERVICE,
+  PubsubSubscriptionService,
+} from '@spinnaker/core';
 
 class PubsubTriggerController implements IController {
   public pubsubSystems = ['kafka', 'google'];
+  public pubsubSubscriptions: string[];
 
-  constructor(public trigger: IPubsubTrigger) {
+  constructor(public trigger: IPubsubTrigger,
+              public pubsubSubscriptionService: PubsubSubscriptionService) {
     'ngInject';
+    pubsubSubscriptionService.getPubsubSubscriptions().then(subscriptions => {
+      this.pubsubSubscriptions = subscriptions;
+    });
   }
 }
 
 export const PUBSUB_TRIGGER = 'spinnaker.core.pipeline.trigger.pubsub';
 module(PUBSUB_TRIGGER, [
   PIPELINE_CONFIG_PROVIDER,
+  PUBSUB_SUBSCRIPTION_SERVICE,
 ]).config((pipelineConfigProvider: PipelineConfigProvider) => {
   pipelineConfigProvider.registerTrigger({
     label: 'Pub/Sub',

app/scripts/modules/core/src/pipeline/config/triggers/pubsub/pubsubTrigger.html

@@ -1,25 +1,27 @@
 <ng-form name="pubsubTriggerForm">
-
-    <div class="form-group">
-        <label class="col-md-3 sm-label-right">
-            Pub/Sub System Type
-        </label>
-        <div class="col-md-6">
-            <select class="form-control input-sm"
-                    ng-options="pubsubSystem for pubsubSystem in vm.pubsubSystems"
-                    ng-model="vm.trigger.pubsubSystem">
-                <option value="">Select Pub/Sub System</option>
-            </select>
-        </div>
+  <div class="form-group">
+    <label class="col-md-3 sm-label-right">
+      Pub/Sub System Type
+    </label>
+    <div class="col-md-6">
+      <select class="form-control input-sm"
+              ng-options="pubsubSystem for pubsubSystem in vm.pubsubSystems"
+              ng-model="vm.trigger.pubsubSystem">
+        <option value="">Select Pub/Sub System</option>
+      </select>
     </div>
+  </div>
 
-    <div class="form-group">
-        <div class="col-md-3 sm-label-right">
-            Subscription Name
-        </div>
-        <div class="col-md-9">
-            <input type="text" class="form-control input-sm" ng-model="vm.trigger.subscriptionName"/>
-        </div>
+  <div class="form-group">
+    <div class="col-md-3 sm-label-right">
+      Subscription Name
     </div>
-
+    <div class="col-md-6">
+      <select class="form-control input-sm"
+              ng-options="pubsubSystem for pubsubSystem in vm.pubsubSubscriptions"
+              ng-model="vm.trigger.subscriptionName">
+        <option value="">Select Pub/Sub Subscription</option>
+      </select>
+    </div>
+  </div>
 </ng-form>

app/scripts/modules/core/src/pubsub/index.ts

@@ -0,0 +1 @@
+export * from './pubsubSubscription.service';

app/scripts/modules/core/src/pubsub/pubsubSubscription.service.ts

@@ -0,0 +1,15 @@
+import { module } from 'angular';
+
+import { API_SERVICE, Api } from 'core/api/api.service';
+
+export class PubsubSubscriptionService {
+  constructor(private API: Api) { 'ngInject'; }
+
+  public getPubsubSubscriptions(): ng.IPromise<string[]> {
+    return this.API.one('pubsub').one('subscriptions').get();
+  }
+}
+
+export const PUBSUB_SUBSCRIPTION_SERVICE = 'spinnaker.core.pubsubSubscription.service';
+module(PUBSUB_SUBSCRIPTION_SERVICE, [API_SERVICE])
+  .service('pubsubSubscriptionService', PubsubSubscriptionService);