Allow setting retentionSecs in backendConfig

Part of #310

webadmin/src/views/settings.html

@@ -191,6 +191,11 @@
                             <input type="text" class="form-control" ng-model="configureBackup.secretAccessKey" id="inputConfigureBackupSecretAccessKey" name="secretAccessKey" ng-disabled="configureBackup.busy" ng-required="s3like(configureBackup.provider)">
                         </div>
 
+                        <div class="form-group">
+                            <label class="control-label" for="storageRetention">Retention Time</label>
+                            <select class="form-control" id="storageRetention" ng-model="configureBackup.retentionSecs" ng-options="a.value as a.name for a in retentionTimes"></select>
+                        </div>
+
                         <div class="form-group" ng-class="{ 'has-error': configureBackup.error.key }">
                             <label class="control-label" for="inputConfigureBackupKey">Encryption key (optional)</label>
                             <input type="text" class="form-control" ng-model="configureBackup.key" id="inputConfigureBackupKey" name="prefix" ng-disabled="configureBackup.busy" placeholder="Passphrase used to encrypt the backups">

webadmin/src/views/settings.js

@@ -56,6 +56,13 @@ angular.module('Application').controller('SettingsController', ['$scope', '$loca
         { name: 'Minio', value: 'minio' }
     ];
 
+    $scope.retentionTimes = [
+        { name: '2 days', value: 2 * 24 * 60 * 60 },
+        { name: '1 week', value:  7 * 24 * 60 * 60},
+        { name: '1 month', value: 30 * 24 * 60 * 60},
+        { name: 'Forever', value: -1 }
+    ];
+
     $scope.planChange = {
         busy: false,
         error: {},
@@ -350,6 +357,7 @@ angular.module('Application').controller('SettingsController', ['$scope', '$loca
         region: '',
         endpoint: '',
         backupFolder: '',
+        retentionSecs: -1,
 
         clearForm: function () {
             $scope.configureBackup.bucket = '';
@@ -359,6 +367,7 @@ angular.module('Application').controller('SettingsController', ['$scope', '$loca
             $scope.configureBackup.endpoint = '';
             $scope.configureBackup.region = '';
             $scope.configureBackup.backupFolder = '';
+            $scope.configureBackup.retentionSecs = -1;
         },
 
         show: function () {
@@ -374,6 +383,7 @@ angular.module('Application').controller('SettingsController', ['$scope', '$loca
             $scope.configureBackup.endpoint = $scope.backupConfig.endpoint;
             $scope.configureBackup.key = $scope.backupConfig.key;
             $scope.configureBackup.backupFolder = $scope.backupConfig.backupFolder;
+            $scope.configureBackup.retentionSecs = $scope.backupConfig.retentionSecs;
 
             $('#configureBackupModal').modal('show');
         },