chore: saveRuleIfAbsent

Author: BFergerson

src/main/kotlin/spp/protocol/service/LiveViewService.kt

@@ -22,6 +22,7 @@ import io.vertx.codegen.annotations.VertxGen
 import io.vertx.core.Future
 import io.vertx.core.Vertx
 import io.vertx.core.eventbus.DeliveryOptions
+import io.vertx.core.eventbus.ReplyException
 import io.vertx.core.json.JsonObject
 import spp.protocol.service.SourceServices.LIVE_VIEW
 import spp.protocol.view.LiveView
@@ -51,6 +52,17 @@ interface LiveViewService {
     fun saveRule(rule: LiveViewRule): Future<LiveViewRule>
     fun deleteRule(ruleName: String): Future<LiveViewRule?>
 
+    @GenIgnore
+    fun saveRuleIfAbsent(rule: LiveViewRule): Future<LiveViewRule> {
+        return saveRule(rule).recover { error ->
+            if (error is ReplyException && error.failureCode() == 409) {
+                Future.succeededFuture(rule)
+            } else {
+                Future.failedFuture(error)
+            }
+        }
+    }
+
     fun addLiveView(subscription: LiveView): Future<LiveView>
     fun updateLiveView(id: String, subscription: LiveView): Future<LiveView>
     fun removeLiveView(id: String): Future<LiveView>

src/main/kotlin/spp/protocol/service/error/RuleAlreadyExistsException.kt

@@ -0,0 +1,27 @@
+/*
+ * Source++, the continuous feedback platform for developers.
+ * Copyright (C) 2022 CodeBrig, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package spp.protocol.service.error
+
+import io.vertx.serviceproxy.ServiceException
+import spp.protocol.view.rule.LiveViewRule
+
+/**
+ * Thrown when attempting to save a [LiveViewRule] that already exists.
+ *
+ * @author [Brandon Fergerson](mailto:[email protected])
+ */
+class RuleAlreadyExistsException(message: String) : ServiceException(409, message)