Public/Select-DataJourney.ps1
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function Select-DataJourney { <# .SYNOPSIS Select from a data journey. .DESCRIPTION Return a copy of a data journey and apply filter on it. #> [CmdletBinding()] param ( # Data journey to select from. [Parameter(Mandatory, ValueFromPipeline)] [PSCustomObject] $Journey, # Models in the data journey diagram. [Parameter()] [string[]] $Model, # Flows in the data journey diagram. [Parameter()] [string[]] $Flow, # Layer in the data journey diagram. [Parameter()] [string] $Layer ) process { $flowFilter = $Flow # select all flows specified $selectedFlows = $Journey | Get-DataFlow -Key $flowFilter -Recurse # select models used by selected flows $transitiveModels = $selectedFlows | ForEach-Object { $_.Sources | ForEach-Object { $_ } $_.Sinks | ForEach-Object { $_ } } # union all required models [string[]] $modelFilter = ( $transitiveModels + $Model) | Where-Object { $_ } | Select-Object -Unique # select all layers used by required models $transitiveLayersByModels = $Journey | Get-DataLayer -Model $modelFilter -Recurse # select all layers used by required flows $transitiveLayersByFlows = $Journey | Get-DataLayer -Flow $flowFilter -Recurse # select layers required by flows or models (recursively) $transitiveLayers = $Journey | Get-DataLayer -Layer ( ( $transitiveLayersByModels + $transitiveLayersByFlows ) | Where-Object { $_ } ) -Transitive [string[]] $layerFilter = ( ( $transitiveLayers | Where-Object { $_.Key } | Select-Object -ExpandProperty Key ) + $Layer) | Where-Object { $_ } | Select-Object -Unique # filter layer $selectedJourney = New-DataJourney -Title:$Journey.Title $Journey | Select-DataJourneyLayer ` -Target $selectedJourney ` -Flow:$flowFilter ` -Model:$modelFilter ` -Layer:$layerFilter # return output $selectedJourney | Write-Output } } |