Fix wrong plugin not installed unknown checkresult

Author: LordHepipud

doc/31-Changelog.md

@@ -34,6 +34,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 * [#208](https://github.com/Icinga/icinga-powershell-framework/pull/208) Fixes `Convert-IcingaPluginThresholds` which sometimes did not return proper numeric usable values for our internal functions, causing issues on plugin calls. In addition the function now also supports the handling for % units.
 * [#213](https://github.com/Icinga/icinga-powershell-framework/pull/213) Fixed possible crash on `Get-IcingaAgentFeatures` if PowerShell is not running as administrator and therefor the command `icinga2 feature list` can not be processed
 * [#213](https://github.com/Icinga/icinga-powershell-framework/pull/213) Fixed `ConvertTo-IcingaSecureString` to return `$null` for empty strings instead of throwing an exception
+* [#214](https://github.com/Icinga/icinga-powershell-framework/pull/214) Fixes wrong `[Unknown] PluginNotInstalled` exception because of new plugin configuration and wrong checking against APi result in case feature is enabled
 
 ### Experimental
 

lib/core/framework/Invoke-IcingaInternalServiceCall.psm1

@@ -101,12 +101,17 @@ function Invoke-IcingaInternalServiceCall()
     $IcingaCR     = '';
 
     # In case we didn't receive a check result, fallback to local execution
-    if ($null -eq $IcingaResult.$Command.checkresult) {
+    if ([string]::IsNullOrEmpty($IcingaResult.$Command.checkresult)) {
         Write-IcingaEventMessage -Namespace 'Framework' -EventId 1553 -Objects 'The check result for the executed command was empty', $Command, $DebugArguments;
         return;
     }
 
-    $IcingaCR     = ($IcingaResult.$Command.checkresult.Replace("`r`n", "`n"));
+    if ([string]::IsNullOrEmpty($IcingaResult.$Command.exitcode)) {
+        Write-IcingaEventMessage -Namespace 'Framework' -EventId 1553 -Objects 'The check result for the executed command was empty', $Command, $DebugArguments;
+        return;
+    }
+
+    $IcingaCR = ($IcingaResult.$Command.checkresult.Replace("`r`n", "`n"));
 
     if ($IcingaResult.$Command.perfdata.Count -ne 0) {
         $IcingaCR += ' | ';

lib/icinga/plugin/Exit-IcingaExecutePlugin.psm1

@@ -4,8 +4,6 @@ function Exit-IcingaExecutePlugin()
         [string]$Command = ''
     );
 
-    Exit-IcingaPluginNotInstalled -Command $Command;
-
     Invoke-IcingaInternalServiceCall -Command $Command -Arguments $args;
 
     try {
@@ -14,6 +12,8 @@ function Exit-IcingaExecutePlugin()
             Use-Icinga;
         }
 
+        Exit-IcingaPluginNotInstalled -Command $Command;
+
         exit (& $Command @args);
     } catch {
         $ExMsg = $_.Exception.Message;