feat(webhooks): add support for service update webhooks (#2161)

* Initial pass at adding webhook controller and routes

* Moving some objects around

* Cleaning up comments

* Fixing syntax, switching to using the docker sdk over building an http client

* Adding delete and list functionality

* Updating the handler to use the correct permissions. Updating some comments

* Fixing some comments

* Code cleanup per pull request comments

* Cleanup per PR feedback. Syntax error fix

* Initial creation of webhook app code

* Moving ClientFactory creation out of handler code and instead using the one created by the main process. Removing webhookInspect method and updating the list function to use json filters

* Delete now works on the webhook ID vs service ID

* WIP - Service creates a webhook. Display will show an existing webhook URL.

* Adding the webhook field to the service view. There is now the ability to add or remove a webhook from a service

* Moving all api calls to be webhooks vs webhook

* Code cleanup. Moving all api calls to be webhooks vs webhook

* More conversion of webhook to webhooks?

* Moving UI elements around. Starting function for copying to clipboard

* Finalizing function for copying to clipboard. Adding button that calls function and copies webhook to clipboard.

* Fixing UI issues. Hiding field entirely when there is no webhook

* Moving URL crafting to a helper method. The edit pane for service now creates/deletes webhooks immidiately.

* style(service-details): update webhook line

* feat(api): strip sha when updating an image via the update webhook

* Fixing up some copy. Only displying the port if it is not http or https

* Fixing tooltip copy. Setting the forceupdate to be true to require an update to occur

* Fixing code climate errors

* Adding WebhookType field and setting to ServiceWebhook for new webhooks. Renaming ServiceID to resourceID so future work can add new types of webhooks in other resource areas.

* Adding the webhook type to the payload to support more types of webhooks in the future. Setting the type correctly when creating one for a service

* feat(webhooks): changes related to webhook management

* API code cleanup, removing unneeded functions, and updating validation logic

* Incorrectly ignoring the error that the webhook did not exist

* Re-adding missing error handling. Changing error response to be a 404 vs 500 when token can't find an object

* fix(webhooks): close Docker client after service webhook execution

app/docker/views/services/edit/service.html

@@ -71,6 +71,24 @@
                     ng-model="service.Image" ng-change="updateServiceAttribute(service, 'Image')" id="image_name" ng-disabled="isUpdating">
               </td>
             </tr>
+            <tr>
+              <td colspan="{{webhookURL ? '1' : '2'}}">
+                Service webhook
+                <portainer-tooltip position="top" message="Webhook (or callback URI) used to automate the update of this service. Sending a POST request to this callback URI (without requiring any authentication) will pull the most up-to-date version of the associated image and re-deploy this service."></portainer-tooltip>
+                <label class="switch" style="margin-left: 20px;">
+                  <input type="checkbox" ng-model="WebhookExists" ng-click="updateWebhook(service)"><i></i>
+                </label>
+              </td>
+              <td ng-if="webhookURL">
+                <span class="text-muted">{{ webhookURL | truncatelr }}</span>
+                <button type="button" class="btn btn-sm btn-primary btn-sm space-left" ng-if="webhookURL" ng-click="copyWebhook()" >
+                  <span><i class="fa fa-copy space-right" aria-hidden="true"></i>Copy link</span>
+                </button>
+                <span>
+                  <i id="copyNotification" class="fa fa-check green-icon" aria-hidden="true" style="margin-left: 7px; display: none;"></i>
+                </span>
+              </td>
+          </tr>
             <tr>
               <td colspan="2">
                 <a ng-if="applicationState.endpoint.apiVersion >= 1.30" class="btn btn-primary btn-sm" type="button" ui-sref="docker.services.service.logs({id: service.Id})"><i class="fa fa-file-alt space-right" aria-hidden="true"></i>Service logs</a>
@@ -93,7 +111,7 @@
         </p>
         <div class="btn-toolbar" role="toolbar">
           <div class="btn-group" role="group">
-            <button type="button" class="btn btn-primary" ng-disabled="!hasChanges(service, ['Mode', 'Replicas', 'Image', 'Name'])" ng-click="updateService(service)">Apply changes</button>
+            <button type="button" class="btn btn-primary" ng-disabled="!hasChanges(service, ['Mode', 'Replicas', 'Image', 'Name', 'Webhooks'])" ng-click="updateService(service)">Apply changes</button>
             <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
               <span class="caret"></span>
             </button>