Private/Generators/Out-AnonymizedDecimal.ps1
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function Out-AnonymizedDecimal { <# .SYNOPSIS Anonymizes a decimal value by applying a random but consistent offset. .DESCRIPTION This function takes a decimal value and applies a deterministic random offset, making the original number unrecognizable while ensuring identical inputs produce identical outputs. This is useful for anonymizing decimal data in testable datasets. .PARAMETER InputNumber The decimal value to anonymize. .EXAMPLE Out-AnonymizedDecimal -InputNumber 123.45 # Returns a randomized decimal, consistent for the same input .OUTPUTS [decimal] #> [CmdletBinding()] [OutputType([decimal])] param( [Parameter(Mandatory = $true, ValueFromPipeline = $true)] [decimal]$InputNumber ) process { # Use the string representation's hash code as seed for deterministic randomization $seed = $InputNumber.ToString().GetHashCode() $random = [System.Random]::new($seed) $sign = [math]::Sign($InputNumber) $absValue = [math]::Abs($InputNumber) # Get the number of digits in the integer part $str = $absValue.ToString() $intPart = $str.Split('.')[0] $digits = $intPart.Length # Get the number of decimal places $decimalPlaces = 0 if ($str.Contains('.')) { $decimalPlaces = $str.Split('.')[1].Length } # Calculate min and max based on digits $min = [math]::Pow(10, $digits - 1) $max = [math]::Pow(10, $digits) - 1 # Generate random integer in range $randInt = $random.Next([int]$min, [int]$max + 1) # Apply decimal places if ($decimalPlaces -eq 0) { $magnitude = $randInt } else { $magnitude = $randInt / [math]::Pow(10, $decimalPlaces) } # Apply sign and cast to decimal $result = $sign * $magnitude return [decimal]$result } } |