Add support to download and install PowerShell service

icinga-module-windows.psd1

@@ -25,7 +25,7 @@ Description = 'Icinga 2 Windows Agent Module, which allows to entirely monitor t
 PowerShellVersion = '3.0'
 
 # Aus diesem Modul zu exportierende Funktionen. Um optimale Leistung zu erzielen, verwenden Sie keine Platzhalter und löschen den Eintrag nicht. Verwenden Sie ein leeres Array, wenn keine zu exportierenden Funktionen vorhanden sind.
-FunctionsToExport = @( 'Use-Icinga', 'Import-IcingaLib', 'Publish-IcingaModuleManifests', 'Get-IcingaPluginDir', 'Get-IcingaCustomPluginDir', 'Get-IcingaCacheDir', 'Get-IcingaPowerShellConfigDir' )
+FunctionsToExport = @( 'Use-Icinga', 'Import-IcingaLib', 'Publish-IcingaModuleManifests', 'Get-IcingaPluginDir', 'Get-IcingaCustomPluginDir', 'Get-IcingaCacheDir', 'Get-IcingaPowerShellConfigDir', 'Get-IcingaPowerShellModuleFile' )
 
 # Aus diesem Modul zu exportierende Cmdlets. Um optimale Leistung zu erzielen, verwenden Sie keine Plat'zhalter und löschen den Eintrag nicht. Verwenden Sie ein leeres Array, wenn keine zu exportierenden Cmdlets vorhanden sind.
 CmdletsToExport = @()

icinga-module-windows.psm1

@@ -165,3 +165,8 @@ function Get-IcingaPowerShellConfigDir()
 {
     return (Join-Path -Path $PSScriptRoot -ChildPath 'config');
 }
+
+function Get-IcingaPowerShellModuleFile()
+{
+    return (Join-Path -Path $PSScriptRoot -ChildPath 'icinga-module-windows.psm1');
+}

lib/core/framework/Expand-IcingaZipArchive.psm1

@@ -0,0 +1,23 @@
+function Expand-IcingaZipArchive()
+{
+    param(
+        $Path,
+        $Destination
+    );
+
+    if ((Test-Path $Path) -eq $FALSE -Or (Test-Path $Destination) -eq $FALSE) {
+        Write-Host 'The path to the zip archive or the destination path do not exist';
+        return $FALSE;
+    }
+
+    Add-Type -AssemblyName System.IO.Compression.FileSystem;
+
+    try {
+        [System.IO.Compression.ZipFile]::ExtractToDirectory($Path, $Destination);
+        return $TRUE;
+    } catch {
+        throw $_.Exception;
+    }
+
+    return $FALSE;
+}

lib/core/framework/Get-IcingaFrameworkServiceBinary.psm1

@@ -0,0 +1,43 @@
+function Get-IcingaFrameworkServiceBinary()
+{
+    param(
+        [string]$DownloadUrl,
+        [string]$InstallDir
+    );
+
+    $ProgressPreference = "SilentlyContinue";
+
+    if ([string]::IsNullOrEmpty($DownloadUrl)) {
+        if ((Get-IcingaAgentInstallerAnswerInput -Prompt 'Do you provide a custom source of the service binary?' -Default 'n').result -eq 1) {
+            $LatestRelease = (Invoke-WebRequest -Uri 'https://github.com/LordHepipud/icinga-windows-service/releases/latest' -UseBasicParsing).BaseResponse.ResponseUri.AbsoluteUri;
+            $DownloadUrl = $LatestRelease.Replace('/tag/', '/download/');
+            $Tag         = $DownloadUrl.Split('/')[-1];
+            $DownloadUrl = [string]::Format('{0}/icinga-service-{1}.zip', $DownloadUrl, $Tag);
+        } else {
+            $DownloadUrl = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter the full path to your service binary repository' -Default 'v').answer;
+        }
+    }
+
+    if ([string]::IsNullOrEmpty($InstallDir)) {
+        $InstallDir = (Get-IcingaAgentInstallerAnswerInput -Prompt 'Please enter the path you wish to install the service to' -Default 'v' -DefaultInput 'C:\Program Files\icinga-framework-service\').answer;
+    }
+
+    if ((Test-Path $InstallDir) -eq $FALSE) {
+        New-Item -Path $InstallDir -Force -ItemType Directory | Out-Null;
+    }
+
+    $ZipArchive = Join-Path -Path $InstallDir -ChildPath ($DownloadUrl.Split('/')[-1]);
+    $ServiceBin = Join-Path -Path $InstallDir -ChildPath 'icinga-service.exe';
+
+    Invoke-WebRequest -Uri $DownloadUrl -UseBasicParsing -OutFile $ZipArchive;
+
+    if ((Expand-IcingaZipArchive -Path $ZipArchive -Destination $InstallDir) -eq $FALSE) {
+        throw 'Failed to expand the downloaded ZIP archive';
+    }
+
+    if ((Test-IcingaZipBinaryChecksum -Path $ServiceBin) -eq $FALSE) {
+        throw 'The checksum of the downloaded file and the required MD5 hash are not matching';
+    }
+
+    return $ServiceBin;
+}

lib/core/framework/Install-IcingaPowerShellService.psm1

@@ -0,0 +1,26 @@
+function Install-IcingaPowerShellService()
+{
+    param(
+        $Path,
+        $Username,
+        [SecureString]$Password
+    );
+
+    if ((Test-Path $Path) -eq $FALSE) {
+        throw 'Please specify the path directly to the service binary';
+    }
+
+    $Path = [string]::Format(
+        '{0} \"{1}\"',
+        $Path,
+        (Get-IcingaPowerShellModuleFile)
+    );
+
+    $ServiceCreation = Start-IcingaProcess -Executable 'sc.exe' -Arguments ([string]::Format('create icingapowershell binPath= "{0}" DisplayName= "Icinga PowerShell Service" start= auto', $Path));
+
+    if ($ServiceCreation.ExitCode -ne 0) {
+        throw ([string]::Format('Failed to install Icinga PowerShell Service: {0}{1}', $ServiceCreation.Message, $ServiceCreation.Error));
+    }
+
+    return (Set-IcingaAgentServiceUser -User $Username -Password $Password -Service 'icingapowershell');
+}

lib/core/framework/Test-IcingaZipBinaryChecksum.psm1

@@ -0,0 +1,23 @@
+function Test-IcingaZipBinaryChecksum()
+{
+    param(
+        $Path
+    );
+
+    $MD5Path = [string]::Format('{0}.md5', $Path);
+
+    if ((Test-Path $MD5Path) -eq $FALSE) {
+        return $TRUE;
+    }
+
+    [string]$MD5Checksum = Get-Content $MD5Path;
+    $MD5Checksum         = ($MD5Checksum.Split(' ')[0]).ToLower();
+
+    $FileHash = ((Get-FileHash $Path -Algorithm MD5).Hash).ToLower();
+    
+    if ($MD5Checksum -ne $FileHash) {
+        return $FALSE;
+    }
+
+    return $TRUE;
+}