Set QBT to alternative speeds while a stream is active in Jellyfin or Emby

QBT_Controller.ps1

# Read configuration from JSON file, run once to generate config.json
$configFile = "$PSScriptRoot/config.json"
if (-not (Test-Path $configFile)) {
    $configlayout = @{
        "jfAddress"="http://127.0.0.1:8096";
        "jfKey"="abcdefg12345";
        "qbtAddress"="http://127.0.0.1:8080";
        "QBusername"="username";
        "QBpassword"="password";
    }
    $configlayout | ConvertTo-Json | Out-File "$PSScriptRoot/config.json.sample"
    Write-Host "Config file not found!" -ForegroundColor Red
    Exit 1
}
$config = Get-Content -Raw -Path $configFile | ConvertFrom-Json

# Function to check play state of a media server
function CheckPlayState($Address, $ApiKey) {
    try {
        # Set up the headers
        $headers = @{
            "Authorization" = "Mediabrowser Token=$ApiKey"
        }

        # Make the API request
        $sessions = Invoke-RestMethod -UseBasicParsing -Uri $Address'/emby/Sessions' -Method 'GET' -ContentType "application/json" -Headers $headers

        $result = $false
        foreach ($session in $sessions) {
            if ($session.PlayState -and $session.PlayState.CanSeek -eq $true -and $session.PlayState.IsPaused -eq $false) {
                $result = $true
                break
            }
        }
        return $result
    } catch {
        Write-Host "Couldn't connect to $Address! Error: $_"
        return $false
    }
}

# Function to set speed limits in qBittorrent
function SetSpeedLimits($qbtAddress, $username, $password, $speedMode) {
    try {
        $loginResult = Invoke-WebRequest -UseBasicParsing -Uri "$qbtAddress/api/v2/auth/login" -Method 'POST' -Body "username=$username&password=$password" -Headers @{'Referrer' = "$qbtAddress/"}
    
        $loginCookie = $loginResult.Headers['Set-Cookie'] -replace "SID=([^;]+).*", '$1'

        $session = [Microsoft.PowerShell.Commands.WebRequestSession]::new()
        $cookie = [System.Net.Cookie]::new('SID', $loginCookie)
        $session.Cookies.Add("$qbtAddress/", $cookie)

        $speedLimitsUrl = "$qbtAddress/api/v2/transfer/speedLimitsMode"
        $currentSpeedMode = Invoke-WebRequest -UseBasicParsing -Uri $speedLimitsUrl -Method 'GET' -WebSession $session | Select-Object -Expand Content
        
        if ($currentSpeedMode -ne $speedMode) {
            if ($speedMode -eq 1) {
                $mode = 'Alternate speed rates enabled'
            } else {
                $mode = 'Standard speed rates enabled'
            }
            Write-Host $mode 
            Invoke-WebRequest -UseBasicParsing -Uri "$qbtAddress/api/v2/transfer/toggleSpeedLimitsMode" -Method 'POST' -WebSession $session | Out-Null
        }
    }
    catch {
        Write-Host "An error occurred: $_"
    }
}

# Extract configuration values
$jfAddress = $config.jfAddress
$jfKey = $config.jfKey
# QB login
$qbtAddress = $config.qbtAddress
$QBusername = $config.QBusername
$QBpassword = $config.QBpassword

# give jellyfin high priority
# I handle this with Service2Task but it could also be done here
#Get-Process -Name "Jellyfin" | ForEach-Object { $_.PriorityClass = 'High' }

# Main loop
while ($true) {
    # sleep for a bit
    Start-Sleep -Seconds 30

    $jfResult = CheckPlayState $jfAddress $jfKey

    if ($jfResult) {
        Write-Host "Active streams found"
        SetSpeedLimits $qbtAddress $QBusername $QBpassword 1
    } else {
        Write-Host "No active streams"
        SetSpeedLimits $qbtAddress $QBusername $QBpassword 0
    }
}