Private/Get-AtwsCacheInfo.ps1
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Function Get-AtwsCacheInfo { [CmdLetBinding()] Param ( [String] $Prefix = 'Atws' ) Begin { Write-Verbose -Message ('{0}: Trying to determine correct location for dynamic module cache.' -F $MyInvocation.MyCommand.Name) $ModuleAutotask = Get-Module -Name Autotask $ModuleVersionFileName = 'ModuleVersionInfo.xml' $ModuleVersionInfo = New-Object -TypeName PSObject -Property @{ APIversion = $AtwsConnection[$Prefix].GetWsdlVersion() ModuleVersion = $ModuleAutotask.Version.ToString() CI = ($AtwsConnection[$Prefix].getZoneInfo($AtwsConnection[$Prefix].Credentials.UserName)).CI } If ($ModuleAutotask.ModuleBase -like "$Env:ProgramFiles*") { $ModuleBase = Split-Path $ModuleAutotask.ModuleBase -Parent } Else { $ModuleBase = '{0}\WindowsPowerShell\Modules\{1}' -F $Env:ProgramFiles, $ModuleAutotask.Name } $CentralCache = '{0}\Autotask.{1}\{2}' -F $ModuleBase, $Prefix, $ModuleVersionFileName Write-Verbose -Message ('{0}: Machine cache location is {1}. Loaded module version is {2} and API version is {3}.' -F $MyInvocation.MyCommand.Name, $CentralCache, $ModuleVersionInfo.ModuleVersion, $ModuleVersionInfo.APIversion) $PersonalModules = '{0}\WindowsPowershell\Modules' -f $([environment]::GetFolderPath('MyDocuments')) $PersonalCache = '{0}\{1}\Autotask.{2}\{3}' -F $PersonalModules, $ModuleAutotask.Name, $Prefix, $ModuleVersionFileName Write-Verbose -Message ('{0}: Personal cache location is {1}. Loaded module version is {2} and API version is {3}.' -F $MyInvocation.MyCommand.Name, $CentralCache, $ModuleVersionInfo.ModuleVersion, $ModuleVersionInfo.APIversion) $CacheDirty = $True } Process { If (Test-Path $PersonalCache) { Write-Verbose -Message ('{0}: A personal cache already exists for prefix {1}' -F $MyInvocation.MyCommand.Name, $Prefix) $CurrentVersionInfo = Import-Clixml -Path $PersonalCache $CachePath = $PersonalCache If ($CurrentVersionInfo.APIversion -eq $ModuleVersionInfo.APIversion ` -and $CurrentVersionInfo.ModuleVersion -eq $ModuleVersionInfo.ModuleVersion` -and $CurrentVersionInfo.CI -eq $ModuleVersionInfo.CI) { Write-Verbose -Message ('{0}: Personal cache is clean. Loading from personal cache.' -F $MyInvocation.MyCommand.Name) $CacheDirty = $False } Else { Write-Verbose -Message ('{0}: Personal cache exists, but is not up to date. Recreating cache.' -F $MyInvocation.MyCommand.Name) } } ElseIf (Test-Path $CentralCache) { Write-Verbose -Message ('{0}: There is no personal cache. Checking central cache location.' -F $MyInvocation.MyCommand.Name) $CurrentVersionInfo = Import-Clixml -Path $CentralCache Try { [io.file]::OpenWrite($CentralCache).close() $CentralPathWritable = $True } Catch { $CentralPathWritable = $False } If ($CurrentVersionInfo.APIversion -eq $ModuleVersionInfo.APIversion ` -and $CurrentVersionInfo.ModuleVersion -eq $ModuleVersionInfo.ModuleVersion` -and $CurrentVersionInfo.CI -eq $ModuleVersionInfo.CI) { Write-Verbose -Message ('{0}: Central cache is clean. Loading from central cache.' -F $MyInvocation.MyCommand.Name) $CacheDirty = $False $CachePath = $CentralCache } ElseIf ($CentralPathWritable) { Write-Verbose -Message ('{0}: Central cache exists, but is not up to date. It is writable for current user. Recreating cache.' -F $MyInvocation.MyCommand.Name) $CachePath = $CentralCache } Else { Write-Verbose -Message ('{0}: Central cache exists, but is not up to date. It is NOT writable for current user. Using personal cache.' -F $MyInvocation.MyCommand.Name) Write-Warning -Message ('{0}: Central cache exists in location {1}, but is not up to date. It is NOT writable for current user. Using personal cache {1}.' -F $MyInvocation.MyCommand.Name, $CentralCache, $PersonalCache) $CachePath = $PersonalCache } } Else { Write-Verbose -Message ('{0}: No cache exists, checking if a central cache location is writable.' -F $MyInvocation.MyCommand.Name) Try { $CacheDir = Split-Path $CentralCache -Parent $Null = New-Item -Path $CacheDir -ItemType Directory -Force -ErrorAction Stop $CachePath = $CentralCache Write-Verbose -Message ('{0}: A central cache location for all users will be created in {1}' -F $MyInvocation.MyCommand.Name, $CacheDir) } Catch { Write-Verbose -Message ('{0}: A personal cache location for current user will be created along {1}' -F $MyInvocation.MyCommand.Name, $PersonalCache) $CachePath = $PersonalCache } Finally { $CacheDirty = $True } } $CacheDir = Split-Path $CachePath -Parent If (-not (Test-Path $CacheDir)) { $Null = New-Item -Path $CacheDir -ItemType Directory -Force -ErrorAction Stop } } End { $CacheInfo = New-Object -TypeName PSObject -Property @{ CachePath = $CachePath CacheDir = $CacheDir CacheDirty = $CacheDirty ModuleVersion = $ModuleVersionInfo.ModuleVersion APIversion = $ModuleVersionInfo.APIversion CI = $ModuleVersionInfo.CI } Return $CacheInfo } } |