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Original file line number | Diff line number | Diff line change |
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function Set-AzOpsStringLength { | ||
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||
<# | ||
.SYNOPSIS | ||
Takes string input and shortens it according to maximum length. | ||
.DESCRIPTION | ||
Takes string input and shortens it according to maximum length. | ||
.PARAMETER String | ||
String to shorten. | ||
.PARAMETER MaxStringLength | ||
Set the maximum length for returned string, default is 255 characters. | ||
Maximum filename length is based on underlying execution environments maximum allowed filename character limit of 255 and the additional characters added by AzOps for files measured by buffer <.parameters> <.json> or <.bicep>. | ||
.EXAMPLE | ||
> Set-AzOpsStringLength -String "microsoft.recoveryservices_vaults_replicationfabrics_replicationprotectioncontainers_replicationprotectioncontainermappings-test1-migratevault-1470815024_1541289ea1c5c535f89c0788063b3f5af00e91a2c63438851d90ef7143747149_cloud_308af796-701f-4d5d-ba68-a2434abb3c84_defaultrecplicationvm-containermapping" | ||
Setting the string length for the above example with default character limit returns the following: | ||
microsoft.recoveryservices_vaults_replicationfabrics_replicationprotectioncontainers_replicationprotectioncontainermappings-test1-migratevault-1470815024_1541289ea1c5c535f89c-BD89FDDC1A27FAD7C0E62CE2AA0A4513193D4F13907CDCF08E540BB5EFBBA9BA | ||
#> | ||
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||
[CmdletBinding()] | ||
param ( | ||
[Parameter(Mandatory = $true)] | ||
[string] | ||
$String, | ||
[Parameter(Mandatory = $false)] | ||
[ValidateRange(155,255)] | ||
[int] | ||
$MaxStringLength = "255" | ||
) | ||
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||
process { | ||
# Determine required buffer for ending, set buffer according to space required | ||
$buffer = ".parameters".Length + $(Get-PSFConfigValue -FullName 'AzOps.Core.TemplateParameterFileSuffix').Length | ||
# Check if string exceed maximum length | ||
if (($String.Length + $buffer) -gt $MaxStringLength){ | ||
$overSize = $String.Length + $buffer - $MaxStringLength | ||
Write-PSFMessage -Level Verbose -String 'Set-AzOpsStringLength.ToLong' -StringValues $String,$MaxStringLength,$overSize -FunctionName 'Set-AzOpsStringLength' | ||
# Generate 64-character hash based on input string | ||
$stringStream = [IO.MemoryStream]::new([byte[]][char[]]$String) | ||
$stringHash = Get-FileHash -InputStream $stringStream -Algorithm SHA256 | ||
$startOfNameLength = $MaxStringLength - $stringHash.Hash.Length - $buffer - 1 | ||
# Process new name | ||
if ($startOfNameLength -gt 1) { | ||
$startOfName = $String.Substring(0,($startOfNameLength)) | ||
$newName = $startofName + '-' + $stringHash.Hash | ||
} | ||
else { | ||
$newName = $stringHash.Hash + $endofName | ||
} | ||
# Construct new string with modified name | ||
$String = $String.Replace($String,$newName) | ||
Write-PSFMessage -Level Verbose -String 'Set-AzOpsStringLength.Shortened' -StringValues $String,$MaxStringLength -FunctionName 'Set-AzOpsStringLength' | ||
return $String | ||
} | ||
else { | ||
# Return original string, it is within limit | ||
Write-PSFMessage -Level Verbose -String 'Set-AzOpsStringLength.WithInLimit' -StringValues $String,$MaxStringLength -FunctionName 'Set-AzOpsStringLength' | ||
return $String | ||
} | ||
} | ||
} |
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