ozg-7493 add send failure message

Jenkinsfile

@@ -21,6 +21,8 @@
  * Die sprachspezifischen Genehmigungen und Beschränkungen
  * unter der Lizenz sind dem Lizenztext zu entnehmen.
  */
+@Library('shared-libs') _
+
 pipeline {
     agent {
        node {
@@ -29,6 +31,7 @@ pipeline {
     }
 
     environment {
+        JENKINS_URL = "https://jenkins.infra.ozg-cloud.systems/job/codeSH_operator/job/${env.BRANCH_NAME}/${env.BUILD_NUMBER}/"
         RELEASE_REGEX = /\d+.\d+.\d+/
         SNAPSHOT_REGEX = /\d+.\d+.\d+-SNAPSHOT/
         FAILED_STAGE = ""
@@ -207,6 +210,15 @@ pipeline {
             }
         }
     }
+    post {
+        failure {
+            script {
+                if (isMainBranch() || isReleaseBranch()) {
+                    sendFailureMessage()
+                }
+            }
+        }
+    }
 }
 
 
@@ -270,12 +282,6 @@ Boolean isReleaseBranch() {
     return env.BRANCH_NAME == 'release'
 }
 
-String getElementAccessToken() {
-    withCredentials([string(credentialsId: 'element-login-json', variable: 'LOGIN_JSON')]) {
-        return readJSON ( text: sh (script: '''curl -XPOST -d \"$LOGIN_JSON\" https://matrix.ozg-sh.de/_matrix/client/v3/login''', returnStdout: true)).access_token
-    }
-}
-
 Void doDevRollout() {
     cloneGitopsRepo()
     setNewOperatorVersion('dev')
@@ -404,3 +410,14 @@ Boolean matchRegexVersion(List versions, String regex) {
 
     return true
 }
+
+Void sendFailureMessage() {
+    def message = "Operator: Build Failed. Stage: ${FAILED_STAGE} Build-ID: <a href='${JENKINS_URL}'>${env.BUILD_NUMBER}</a>"
+
+    if (isMainBranch()){
+        sendMatrixMessage.sendMessageToMasterRoom(message)
+    }
+    else {
+        sendMatrixMessage.sendMessageToReleaseRoom(message)
+    }
+}
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