Public/Test-FeatureFlag.ps1
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function Test-FeatureFlag { <# .SYNOPSIS Checks if the current machine's context will pass the feature flag rules. .DESCRIPTION Determines if a given context will pass the feature flag rules. Returns a `$True` or `$False` allowing you to gate keep your features. .PARAMETER FeatureFlag The name of the feature flag to test. .PARAMETER Properties A hashtable of properties that define the different values in the context. .PARAMETER Context The context to use to test against. .EXAMPLE $context = Get-DeviceContext Test-FeatureFlag -FeatureFlag '' -Context $context This will test if the current device will pass the feature flag rules. #> [CmdletBinding()] param ( [Parameter(Mandatory, ValueFromPipeline)] [FeatureFlag] [FeatureFlagTransformAttribute()] $FeatureFlag, [PropertySet] [PropertySetTransformAttribute()] $Properties, [Parameter(Mandatory)] [hashtable] $Context ) begin { $finalResult = $False } process { # Process each feature Write-Verbose "Processing Feature $($FeatureFlag.Name) with ($($FeatureFlag.Rules.Count)) rules" foreach ($rule in $Feature.Rules) { Write-Verbose "Processing Rule $($rule.Name)" $testConditionSplat = @{ Context = $Context Properties = $Properties Condition = $rule.Conditions } if (Test-Condition @testConditionSplat) { Write-Verbose "✅ Rule [$($rule.Name)] matched. Effect: $($rule.Effect)" -ForegroundColor Green # Check effect switch ($rule.Effect) { 'Allow' { $finalResult = $true break } 'Deny' { $finalResult = $false break } 'Audit' { # TODO: Implement auditing function } 'Warn' { Write-Warning "⚠️ Rule [$($rule.Name)] matched." } default { throw 'Unknown effect' } } } else { Write-Verbose "⛔ Rule [$($rule.Name)] did not match." } } } end { # Return a single bool return $finalResult } } |