Initial commit: IT Nexus Web-App

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2026-06-01 20:49:07 +02:00
commit 8023765e6c
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# IT Nexus Monitoring Agent v1.3
# Cereda Systems GmbH
# Laedt Systemdaten und sendet sie an IT Nexus
$AgentVersion = "1.3.1"
$ConfigPath = Join-Path $PSScriptRoot "config.json"
$LogPath = Join-Path $PSScriptRoot "agent.log"
function Write-Log($msg) {
$line = "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') $msg"
Add-Content -Path $LogPath -Value $line -ErrorAction SilentlyContinue
}
# Config laden
if (-not (Test-Path $ConfigPath)) {
Write-Log "ERROR: config.json nicht gefunden"
exit 1
}
$config = Get-Content $ConfigPath | ConvertFrom-Json
$ServerUrl = $config.server_url.TrimEnd('/')
$AgentKey = $config.agent_key
function Get-CpuUsage {
try {
$pc = [System.Diagnostics.PerformanceCounter]::new("Processor", "% Processor Time", "_Total")
$pc.NextValue() | Out-Null
Start-Sleep -Milliseconds 800
return [math]::Round($pc.NextValue(), 1)
} catch { return $null }
}
function Get-RamInfo {
try {
$os = Get-CimInstance Win32_OperatingSystem
$total = [math]::Round($os.TotalVisibleMemorySize / 1MB, 2)
$free = [math]::Round($os.FreePhysicalMemory / 1MB, 2)
return @{ total = $total; used = [math]::Round($total - $free, 2) }
} catch { return @{ total = $null; used = $null } }
}
function Get-DiskInfo {
try {
$disk = Get-PSDrive C
$total = [math]::Round(($disk.Used + $disk.Free) / 1GB, 2)
$free = [math]::Round($disk.Free / 1GB, 2)
return @{ total = $total; free = $free }
} catch { return @{ total = $null; free = $null } }
}
function Get-CpuInfo {
try {
$cpu = Get-CimInstance Win32_Processor | Select-Object -First 1
return @{ model = $cpu.Name.Trim(); cores = $cpu.NumberOfCores }
} catch { return @{ model = $null; cores = $null } }
}
function Get-MacAddress {
try {
$mac = (Get-CimInstance Win32_NetworkAdapterConfiguration | Where-Object { $_.IPEnabled } | Select-Object -First 1).MACAddress
return $mac
} catch { return $null }
}
function Get-InstalledSoftware {
try {
$paths = @(
'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*',
'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
)
$apps = Get-ItemProperty $paths -ErrorAction SilentlyContinue |
Where-Object { $_.DisplayName -and $_.DisplayName -notmatch '^KB\d+' } |
Select-Object -ExpandProperty DisplayName -Unique |
ForEach-Object { [System.Text.RegularExpressions.Regex]::Replace($_, '[^\x20-\x7E]', '') } |
Where-Object { $_.Length -gt 2 } |
Sort-Object |
Select-Object -First 100
return $apps
} catch { return @() }
}
function Get-PendingUpdates {
try {
$session = New-Object -ComObject Microsoft.Update.Session
$searcher = $session.CreateUpdateSearcher()
$result = $searcher.Search("IsInstalled=0 and Type='Software'")
return $result.Updates.Count
} catch { return 0 }
}
function Get-UptimeHours {
try {
$uptime = (Get-Date) - (gcim Win32_OperatingSystem).LastBootUpTime
return [math]::Round($uptime.TotalHours, 1)
} catch { return $null }
}
function Get-LastUser {
try {
$user = (Get-CimInstance Win32_ComputerSystem).UserName
if ($user) { return $user.Split('\')[-1] }
$profile = Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\*' |
Where-Object { $_.ProfileImagePath -like 'C:\Users\*' -and $_.ProfileImagePath -notlike '*default*' } |
Sort-Object { $_.PSChildName } | Select-Object -Last 1
return ($profile.ProfileImagePath -split '\\')[-1]
} catch { return $null }
}
function Get-TpmInfo {
try {
$tpm = Get-WmiObject -Namespace "Root\CIMv2\Security\MicrosoftTpm" -Class Win32_Tpm -ErrorAction Stop
if ($tpm) {
$specVer = $tpm.SpecVersion
$isV2 = $specVer -like "*2.0*"
return @{ present = $true; version = $specVer; is_v2 = $isV2 }
}
return @{ present = $false; version = $null; is_v2 = $false }
} catch {
return @{ present = $false; version = $null; is_v2 = $false }
}
}
function Get-SecureBootStatus {
try {
$sb = Confirm-SecureBootUEFI -ErrorAction Stop
return [bool]$sb
} catch {
return $false
}
}
function Get-Win11Readiness {
$tpm = Get-TpmInfo
$sb = Get-SecureBootStatus
$cpu = Get-CimInstance Win32_Processor | Select-Object -First 1
$ram = (Get-CimInstance Win32_OperatingSystem).TotalVisibleMemorySize / 1MB
$cpuOk = $cpu -and $cpu.NumberOfCores -ge 2 -and $cpu.MaxClockSpeed -ge 1000
$ramOk = $ram -ge 4
$ready = $tpm.is_v2 -and $sb -and $cpuOk -and $ramOk
return @{
tpm_present = $tpm.present
tpm_version = if ($tpm.version) { $tpm.version } else { $null }
tpm_v2 = $tpm.is_v2
secure_boot = $sb
win11_ready = $ready
}
}
# Systemdaten sammeln
Write-Log "Sammle Systemdaten..."
$cpu = Get-CpuInfo
$ram = Get-RamInfo
$disk = Get-DiskInfo
$cpuPct = Get-CpuUsage
$mac = Get-MacAddress
$updates = Get-PendingUpdates
$uptime = Get-UptimeHours
$lastUser = Get-LastUser
$software = Get-InstalledSoftware
$win11 = Get-Win11Readiness
$ip = (Get-NetIPAddress -AddressFamily IPv4 | Where-Object {
$_.InterfaceAlias -notlike '*Loopback*' -and
$_.InterfaceAlias -notlike '*vEthernet*' -and
$_.InterfaceAlias -notlike '*WSL*' -and
$_.InterfaceAlias -notlike '*Virtual*' -and
$_.IPAddress -notlike '169.*' -and
$_.IPAddress -notlike '172.*'
} | Select-Object -First 1).IPAddress
if (-not $ip) {
$ip = (Get-NetIPAddress -AddressFamily IPv4 | Where-Object {
$_.InterfaceAlias -notlike '*Loopback*' -and
$_.InterfaceAlias -notlike '*vEthernet*' -and
$_.IPAddress -notlike '169.*'
} | Select-Object -First 1).IPAddress
}
$os = Get-CimInstance Win32_OperatingSystem
$domain = $env:USERDOMAIN
$payload = @{
hostname = $env:COMPUTERNAME
ip_address = $ip
mac_address = $mac
os_name = $os.Caption
os_version = $os.Version
cpu_model = $cpu.model
cpu_cores = $cpu.cores
cpu_usage_percent = $cpuPct
ram_total_gb = $ram.total
ram_used_gb = $ram.used
disk_total_gb = $disk.total
disk_free_gb = $disk.free
last_user = $lastUser
uptime_hours = $uptime
domain = $domain
agent_version = $AgentVersion
installed_software = $software
windows_updates_pending = $updates
tpm_present = $win11.tpm_present
tpm_version = $win11.tpm_version
tpm_v2 = $win11.tpm_v2
secure_boot = $win11.secure_boot
win11_ready = $win11.win11_ready
} | ConvertTo-Json -Depth 3
# --- An IT Nexus senden ---
function Invoke-PatchCommand($cmd, $cmdId) {
Write-Log "PATCH: Command empfangen: $($cmd) (ID: $cmdId)"
$result = "OK"
try {
switch ($cmd) {
'check_updates' {
UsoClient.exe StartScan 2>$null
Start-Sleep -Seconds 5
$result = "Update-Scan gestartet"
Write-Log "PATCH: Update-Scan gestartet"
}
'install_updates' {
UsoClient.exe StartDownload 2>$null
Start-Sleep -Seconds 3
UsoClient.exe StartInstall 2>$null
$result = "Update-Installation gestartet"
Write-Log "PATCH: Update-Installation gestartet"
}
'update_agent' {
Write-Log "UPDATE: Manuelles Agent-Update angefordert..."
try {
$scriptPath = $MyInvocation.MyCommand.Path
$tempPath = "$scriptPath.update"
$updateHeaders = @{ 'X-Agent-Key' = $AgentKey }
Invoke-WebRequest -Uri "$ServerUrl/api/monitoring/agent-script" `
-Headers $updateHeaders -OutFile $tempPath -TimeoutSec 30
if ((Get-Item $tempPath -ErrorAction SilentlyContinue).Length -gt 1024) {
Copy-Item -Path $tempPath -Destination $scriptPath -Force
Remove-Item $tempPath -Force -ErrorAction SilentlyContinue
$result = "Agent erfolgreich aktualisiert - neue Version aktiv ab naechstem Run"
Write-Log "UPDATE: Manuelles Update erfolgreich"
} else {
Remove-Item $tempPath -Force -ErrorAction SilentlyContinue
$result = "Fehler: Heruntergeladene Datei ungueltig"
Write-Log "UPDATE ERROR: Datei zu klein"
}
} catch {
$result = "Fehler: $($_.Exception.Message)"
Write-Log "UPDATE ERROR: $result"
}
}
'upgrade_win11' {
Write-Log "WIN11: Starte Windows 11 Upgrade-Prozess..."
$assistantPath = "C:\ProgramData\IT Nexus Agent\Win11Upgrade.exe"
try {
Write-Log "WIN11: Lade Installation Assistant herunter..."
Invoke-WebRequest -Uri "https://go.microsoft.com/fwlink/?linkid=2171764" -OutFile $assistantPath -TimeoutSec 300
if ((Get-Item $assistantPath -ErrorAction SilentlyContinue).Length -gt 1MB) {
# Als angemeldeter Benutzer ausfuehren damit UI sichtbar ist
$loggedInUser = (Get-CimInstance Win32_ComputerSystem).UserName
if ($loggedInUser -and $loggedInUser -ne '') {
Unregister-ScheduledTask -TaskName "IT Nexus Win11 Upgrade" -Confirm:$false -ErrorAction SilentlyContinue
$action = New-ScheduledTaskAction -Execute $assistantPath -Argument "/skipeula /auto upgrade"
$trigger = New-ScheduledTaskTrigger -Once -At (Get-Date).AddSeconds(20)
$principal = New-ScheduledTaskPrincipal -UserId $loggedInUser -LogonType Interactive -RunLevel Highest
$settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Hours 3)
Register-ScheduledTask -TaskName "IT Nexus Win11 Upgrade" -Action $action -Trigger $trigger -Principal $principal -Settings $settings -Force | Out-Null
Start-ScheduledTask -TaskName "IT Nexus Win11 Upgrade"
$reportBody = @{ command_id = $cmdId; status = 'running'; result = "Windows 11 Upgrade gestartet fuer Benutzer $loggedInUser - Fortschritt sichtbar auf dem Geraet" } | ConvertTo-Json
Invoke-RestMethod -Uri "$ServerUrl/api/patch/commands/result" -Method POST -Body $reportBody -Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } -TimeoutSec 10 -ErrorAction SilentlyContinue
Write-Log "WIN11: Upgrade als $loggedInUser gestartet (Status: running)"
return
} else {
Start-Process -FilePath $assistantPath -ArgumentList "/quietinstall /skipeula /auto upgrade" -NoNewWindow
$reportBody = @{ command_id = $cmdId; status = 'running'; result = "Windows 11 Upgrade gestartet (kein Benutzer angemeldet)" } | ConvertTo-Json
Invoke-RestMethod -Uri "$ServerUrl/api/patch/commands/result" -Method POST -Body $reportBody -Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } -TimeoutSec 10 -ErrorAction SilentlyContinue
Write-Log "WIN11: Upgrade als SYSTEM gestartet (kein User)"
return
}
} else {
$result = "Fehler: Download fehlgeschlagen oder Datei zu klein"
Write-Log "WIN11 ERROR: Download fehlgeschlagen"
}
} catch {
$result = "Fehler: $($_.Exception.Message)"
Write-Log "WIN11 ERROR: $result"
}
}
'reboot' {
$result = "Neustart wird in 60 Sekunden durchgefuehrt"
Write-Log "PATCH: Neustart geplant"
$reportBody = @{ command_id = $cmdId; status = 'done'; result = $result } | ConvertTo-Json
Invoke-RestMethod -Uri "$ServerUrl/api/patch/commands/result" `
-Method POST -Body $reportBody `
-Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } `
-TimeoutSec 10 -ErrorAction SilentlyContinue
Start-Sleep -Seconds 5
shutdown.exe /r /t 60 /c "IT Nexus Patch Management - Geplanter Neustart"
return
}
}
} catch {
$result = "Fehler: $($_.Exception.Message)"
Write-Log "PATCH ERROR: $result"
}
try {
$reportBody = @{ command_id = $cmdId; status = 'done'; result = $result } | ConvertTo-Json
Invoke-RestMethod -Uri "$ServerUrl/api/patch/commands/result" `
-Method POST -Body $reportBody `
-Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } `
-TimeoutSec 10
} catch {
Write-Log "PATCH: Ergebnis-Meldung fehlgeschlagen: $($_.Exception.Message)"
}
}
try {
$headers = @{
'Content-Type' = 'application/json'
'X-Agent-Key' = $AgentKey
}
$cleanPayload = $payload -replace '[\x00-\x1F\x7F]', ''
$response = Invoke-RestMethod -Uri "$ServerUrl/api/monitoring/checkin" `
-Method POST -Body $cleanPayload -Headers $headers -TimeoutSec 30
Write-Log "OK: Checkin erfolgreich (Hostname: $env:COMPUTERNAME)"
# Self-Update pruefen
$serverVersion = $response.agent_version
if ($serverVersion -and $serverVersion -ne $AgentVersion) {
Write-Log "UPDATE: Neue Agent-Version verfuegbar: $serverVersion (aktuell: $AgentVersion)"
try {
$scriptPath = $MyInvocation.MyCommand.Path
$tempPath = "$scriptPath.update"
$updateHeaders = @{ 'X-Agent-Key' = $AgentKey }
Invoke-WebRequest -Uri "$ServerUrl/api/monitoring/agent-script" `
-Headers $updateHeaders -OutFile $tempPath -TimeoutSec 30
if ((Get-Item $tempPath).Length -gt 1024) {
Copy-Item -Path $tempPath -Destination $scriptPath -Force
Remove-Item $tempPath -Force -ErrorAction SilentlyContinue
Write-Log "UPDATE: Agent erfolgreich auf Version $serverVersion aktualisiert."
} else {
Remove-Item $tempPath -Force -ErrorAction SilentlyContinue
Write-Log "UPDATE: Heruntergeladene Datei zu klein - Update abgebrochen"
}
} catch {
Write-Log "UPDATE ERROR: $($_.Exception.Message)"
}
}
# Laufende Commands pruefen (z.B. Win11 Upgrade)
if ($response.running_commands -and $response.running_commands.Count -gt 0) {
foreach ($rc in $response.running_commands) {
if ($rc.command -eq 'upgrade_win11') {
$task = Get-ScheduledTask -TaskName "IT Nexus Win11 Upgrade" -ErrorAction SilentlyContinue
$proc = Get-Process -Name "Win11Upgrade" -ErrorAction SilentlyContinue
$stillRunning = ($task -and $task.State -eq 'Running') -or ($proc -ne $null)
if (-not $stillRunning) {
$taskInfo = Get-ScheduledTaskInfo -TaskName "IT Nexus Win11 Upgrade" -ErrorAction SilentlyContinue
$exitCode = if ($taskInfo) { $taskInfo.LastTaskResult } else { 0 }
$doneResult = if ($exitCode -eq 0) { "Windows 11 Upgrade abgeschlossen" } else { "Upgrade beendet (Code: $exitCode)" }
$rb = @{ command_id = $rc.id; status = 'done'; result = $doneResult } | ConvertTo-Json
Invoke-RestMethod -Uri "$ServerUrl/api/patch/commands/result" -Method POST -Body $rb -Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } -TimeoutSec 10 -ErrorAction SilentlyContinue
Write-Log "WIN11: Upgrade abgeschlossen (Code: $exitCode)"
} else {
Write-Log "WIN11: Upgrade laeuft noch..."
}
}
}
}
# Ankuendigungen anzeigen (als eingeloggter Benutzer via ScheduledTask)
if ($response.announcements -and $response.announcements.Count -gt 0) {
foreach ($ann in $response.announcements) {
try {
$annId = $ann.id
$annTitle = $ann.title -replace "'", "''"
$annMessage = $ann.message -replace "'", "''"
$typeLabel = switch ($ann.type) {
'warning' { 'WICHTIGE WARNUNG' }
'maintenance' { 'WARTUNGSANKUENDIGUNG' }
default { 'INFORMATION' }
}
$accentColor = switch ($ann.type) {
'warning' { '220, 50, 50' }
'maintenance' { '245, 158, 11' }
default { '99, 102, 241' }
}
# PS-Script das im Benutzer-Kontext laeuft und den Dialog zeigt
$dialogScript = @"
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
`$form = New-Object System.Windows.Forms.Form
`$form.Text = 'IT Nexus - $typeLabel'
`$form.Size = New-Object System.Drawing.Size(520, 330)
`$form.StartPosition = 'CenterScreen'
`$form.FormBorderStyle = 'FixedDialog'
`$form.MaximizeBox = `$false
`$form.MinimizeBox = `$false
`$form.TopMost = `$true
`$form.BackColor = [System.Drawing.Color]::FromArgb(24, 24, 37)
`$lTitle = New-Object System.Windows.Forms.Label
`$lTitle.Text = '$annTitle'
`$lTitle.Font = New-Object System.Drawing.Font('Segoe UI', 13, [System.Drawing.FontStyle]::Bold)
`$lTitle.ForeColor = [System.Drawing.Color]::White
`$lTitle.Location = New-Object System.Drawing.Point(20, 20)
`$lTitle.Size = New-Object System.Drawing.Size(460, 36)
`$form.Controls.Add(`$lTitle)
`$lMsg = New-Object System.Windows.Forms.Label
`$lMsg.Text = '$annMessage'
`$lMsg.Font = New-Object System.Drawing.Font('Segoe UI', 10)
`$lMsg.ForeColor = [System.Drawing.Color]::FromArgb(200, 200, 220)
`$lMsg.Location = New-Object System.Drawing.Point(20, 66)
`$lMsg.Size = New-Object System.Drawing.Size(460, 155)
`$lMsg.AutoSize = `$false
`$form.Controls.Add(`$lMsg)
`$lHint = New-Object System.Windows.Forms.Label
`$lHint.Text = 'Bitte lesen und Kenntnisnahme bestaetigen.'
`$lHint.Font = New-Object System.Drawing.Font('Segoe UI', 8, [System.Drawing.FontStyle]::Italic)
`$lHint.ForeColor = [System.Drawing.Color]::FromArgb(130, 130, 150)
`$lHint.Location = New-Object System.Drawing.Point(20, 228)
`$lHint.Size = New-Object System.Drawing.Size(460, 20)
`$form.Controls.Add(`$lHint)
`$btn = New-Object System.Windows.Forms.Button
`$btn.Text = 'Gelesen und bestaetigt'
`$btn.Font = New-Object System.Drawing.Font('Segoe UI', 10, [System.Drawing.FontStyle]::Bold)
`$btn.ForeColor = [System.Drawing.Color]::White
`$btn.BackColor = [System.Drawing.Color]::FromArgb($accentColor)
`$btn.FlatStyle = 'Flat'
`$btn.Location = New-Object System.Drawing.Point(20, 255)
`$btn.Size = New-Object System.Drawing.Size(460, 40)
`$btn.DialogResult = [System.Windows.Forms.DialogResult]::OK
`$form.Controls.Add(`$btn)
`$form.AcceptButton = `$btn
`$r = `$form.ShowDialog()
if (`$r -eq [System.Windows.Forms.DialogResult]::OK) {
`$b = [System.Text.Encoding]::UTF8.GetBytes('{"hostname":"' + `$env:COMPUTERNAME + '"}')
`$req = [System.Net.WebRequest]::Create('$ServerUrl/api/announcements/$annId/ack-agent')
`$req.Method = 'POST'
`$req.ContentType = 'application/json'
`$req.Headers.Add('X-Agent-Key','$AgentKey')
`$req.ContentLength = `$b.Length
`$s = `$req.GetRequestStream(); `$s.Write(`$b,0,`$b.Length); `$s.Close()
try { `$req.GetResponse().Close() } catch {}
}
"@
# Dialog-Script temporaer speichern
$scriptFile = "C:\ProgramData\IT Nexus Agent\ann_$annId.ps1"
$dialogScript | Out-File -FilePath $scriptFile -Encoding UTF8 -Force
# Eingeloggten Benutzer ermitteln
$loggedUser = (Get-CimInstance Win32_ComputerSystem).UserName
if ($loggedUser -and $loggedUser -ne '') {
$taskName = "ITNexus-Ann-$annId"
Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
$action = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "-ExecutionPolicy Bypass -WindowStyle Normal -File `"$scriptFile`""
$trigger = New-ScheduledTaskTrigger -Once -At (Get-Date).AddSeconds(3)
$principal = New-ScheduledTaskPrincipal -UserId $loggedUser -LogonType Interactive -RunLevel Limited
$settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 60) -StartWhenAvailable
Register-ScheduledTask -TaskName $taskName -Action $action -Trigger $trigger -Principal $principal -Settings $settings -Force | Out-Null
Write-Log "ANNOUNCEMENT: Dialog fuer Benutzer $loggedUser gestartet - ID $annId"
} else {
Write-Log "ANNOUNCEMENT: Kein Benutzer eingeloggt - Dialog wird beim naechsten Check-in versucht"
}
} catch {
Write-Log "ANNOUNCEMENT ERROR: $($_.Exception.Message)"
}
}
}
# Pending Patch-Commands verarbeiten
if ($response.commands -and $response.commands.Count -gt 0) {
Write-Log "PATCH: $($response.commands.Count) Command(s) empfangen"
foreach ($cmd in $response.commands) {
Invoke-PatchCommand -cmd $cmd.command -cmdId $cmd.id
}
}
} catch {
$statusCode = $_.Exception.Response.StatusCode.Value__
Write-Log "ERROR: Checkin fehlgeschlagen - HTTP $statusCode - $($_.Exception.Message)"
try {
$reader = New-Object System.IO.StreamReader($_.Exception.Response.GetResponseStream())
Write-Log "ERROR Detail: $($reader.ReadToEnd())"
} catch {}
}
# ── Schneller Announcement-Poll (alle 15 Sekunden im Hintergrund) ─────────────
function Invoke-AnnouncementPoll {
try {
$pollBody = @{ hostname = $env:COMPUTERNAME } | ConvertTo-Json
$pollResp = Invoke-RestMethod -Uri "$ServerUrl/api/monitoring/announcements-poll" `
-Method POST -Body $pollBody `
-Headers @{ 'Content-Type' = 'application/json'; 'X-Agent-Key' = $AgentKey } `
-TimeoutSec 10
if ($pollResp.announcements -and $pollResp.announcements.Count -gt 0) {
foreach ($ann in $pollResp.announcements) {
$annId = $ann.id
$annTitle = $ann.title -replace "'", "''"
$annMessage = $ann.message -replace "'", "''"
$accentColor = switch ($ann.type) {
'warning' { '220, 50, 50' }
'maintenance' { '245, 158, 11' }
default { '99, 102, 241' }
}
$typeLabel = switch ($ann.type) {
'warning' { 'WICHTIGE WARNUNG' }
'maintenance' { 'WARTUNGSANKUENDIGUNG' }
default { 'INFORMATION' }
}
$dialogScript = @"
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
`$form = New-Object System.Windows.Forms.Form
`$form.Text = 'IT Nexus - $typeLabel'
`$form.Size = New-Object System.Drawing.Size(520, 330)
`$form.StartPosition = 'CenterScreen'
`$form.FormBorderStyle = 'FixedDialog'
`$form.MaximizeBox = `$false
`$form.MinimizeBox = `$false
`$form.TopMost = `$true
`$form.BackColor = [System.Drawing.Color]::FromArgb(24, 24, 37)
`$lTitle = New-Object System.Windows.Forms.Label
`$lTitle.Text = '$annTitle'
`$lTitle.Font = New-Object System.Drawing.Font('Segoe UI', 13, [System.Drawing.FontStyle]::Bold)
`$lTitle.ForeColor = [System.Drawing.Color]::White
`$lTitle.Location = New-Object System.Drawing.Point(20, 20)
`$lTitle.Size = New-Object System.Drawing.Size(460, 36)
`$form.Controls.Add(`$lTitle)
`$lMsg = New-Object System.Windows.Forms.Label
`$lMsg.Text = '$annMessage'
`$lMsg.Font = New-Object System.Drawing.Font('Segoe UI', 10)
`$lMsg.ForeColor = [System.Drawing.Color]::FromArgb(200, 200, 220)
`$lMsg.Location = New-Object System.Drawing.Point(20, 66)
`$lMsg.Size = New-Object System.Drawing.Size(460, 155)
`$lMsg.AutoSize = `$false
`$form.Controls.Add(`$lMsg)
`$lHint = New-Object System.Windows.Forms.Label
`$lHint.Text = 'Bitte lesen und Kenntnisnahme bestaetigen.'
`$lHint.Font = New-Object System.Drawing.Font('Segoe UI', 8, [System.Drawing.FontStyle]::Italic)
`$lHint.ForeColor = [System.Drawing.Color]::FromArgb(130, 130, 150)
`$lHint.Location = New-Object System.Drawing.Point(20, 228)
`$lHint.Size = New-Object System.Drawing.Size(460, 20)
`$form.Controls.Add(`$lHint)
`$btn = New-Object System.Windows.Forms.Button
`$btn.Text = 'Gelesen und bestaetigt'
`$btn.Font = New-Object System.Drawing.Font('Segoe UI', 10, [System.Drawing.FontStyle]::Bold)
`$btn.ForeColor = [System.Drawing.Color]::White
`$btn.BackColor = [System.Drawing.Color]::FromArgb($accentColor)
`$btn.FlatStyle = 'Flat'
`$btn.Location = New-Object System.Drawing.Point(20, 255)
`$btn.Size = New-Object System.Drawing.Size(460, 40)
`$btn.DialogResult = [System.Windows.Forms.DialogResult]::OK
`$form.Controls.Add(`$btn)
`$form.AcceptButton = `$btn
`$r = `$form.ShowDialog()
if (`$r -eq [System.Windows.Forms.DialogResult]::OK) {
`$b = [System.Text.Encoding]::UTF8.GetBytes('{"hostname":"' + `$env:COMPUTERNAME + '"}')
`$req = [System.Net.WebRequest]::Create('$ServerUrl/api/announcements/$annId/ack-agent')
`$req.Method = 'POST'; `$req.ContentType = 'application/json'
`$req.Headers.Add('X-Agent-Key','$AgentKey')
`$req.ContentLength = `$b.Length
`$s = `$req.GetRequestStream(); `$s.Write(`$b,0,`$b.Length); `$s.Close()
try { `$req.GetResponse().Close() } catch {}
}
"@
$scriptFile = "C:\ProgramData\IT Nexus Agent\ann_$annId.ps1"
$dialogScript | Out-File -FilePath $scriptFile -Encoding UTF8 -Force
$loggedUser = (Get-CimInstance Win32_ComputerSystem).UserName
if ($loggedUser) {
$taskName = "ITNexus-Ann-$annId"
Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
$action = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "-ExecutionPolicy Bypass -WindowStyle Normal -File `"$scriptFile`""
$trigger = New-ScheduledTaskTrigger -Once -At (Get-Date).AddSeconds(2)
$principal = New-ScheduledTaskPrincipal -UserId $loggedUser -LogonType Interactive -RunLevel Limited
$settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 60) -StartWhenAvailable
Register-ScheduledTask -TaskName $taskName -Action $action -Trigger $trigger -Principal $principal -Settings $settings -Force | Out-Null
Write-Log "ANNOUNCEMENT: Sofort-Dialog gestartet fuer $loggedUser - ID $annId"
}
}
}
} catch {
# Stiller Fehler - nicht kritisch
}
}
# Announcement-Watcher-Task einrichten (alle 15 Sek, bleibt dauerhaft aktiv)
try {
$watcherName = 'IT Nexus Announcement Watcher'
$watcherScript = 'C:\ProgramData\IT Nexus Agent\ann-watcher.ps1'
# Watcher-Script vom Server laden (immer aktuell)
Invoke-WebRequest -Uri "$ServerUrl/api/monitoring/ann-watcher" `
-Headers @{ 'X-Agent-Key' = $AgentKey } `
-OutFile $watcherScript -TimeoutSec 15 -ErrorAction SilentlyContinue
# Task registrieren falls noch nicht vorhanden
if (-not (Get-ScheduledTask -TaskName $watcherName -ErrorAction SilentlyContinue)) {
$wAct = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "-ExecutionPolicy Bypass -NonInteractive -WindowStyle Hidden -File `"$watcherScript`""
$wTrg = New-ScheduledTaskTrigger -RepetitionInterval (New-TimeSpan -Seconds 15) -Once -At (Get-Date)
$wSet = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Seconds 14) -MultipleInstances IgnoreNew -StartWhenAvailable
$wPri = New-ScheduledTaskPrincipal -UserId 'SYSTEM' -LogonType ServiceAccount -RunLevel Highest
Register-ScheduledTask -TaskName $watcherName -Action $wAct -Trigger $wTrg -Settings $wSet -Principal $wPri -Force | Out-Null
Write-Log "ANNOUNCEMENT: Watcher-Task registriert (alle 15 Sekunden)"
}
} catch {
Write-Log "ANNOUNCEMENT WATCHER ERROR: $($_.Exception.Message)"
}