Public/New-Diagram.ps1
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function New-Diagram { <# .SYNOPSIS Creates a new mermaid diagram. .DESCRIPTION Creates and returns a new diagram definition, that can be populated and later exported. .INPUTS None. .OUTPUTS Mermaid diagram definition object. .EXAMPLE PS C:\> $diagram = New-MermaidDiagram -ErDiagram PS C:\> $diagram | Add-MermaidErRelation Exactly-one Customer places Zero-or-more Order PS C:\> $diagram | Add-MermaidErRelation Exactly-one Order contains One-or-more LineItem PS C:\> $diagram | Add-MermaidErRelation One-or-more Customer uses One-or-more DeliveryAddress -NonIdentifying PS C:\> $diagram | ConvertTo-MermaidString erDiagram Customer ||--o{ Order : places Order ||--|{ LineItem : contains Customer }|..|{ DeliveryAddress : uses Create a erDiagram, add a few relations and convert it to a diagram string. .LINK https://mermaid-js.github.io/mermaid/#/README?id=diagram-types #> [CmdletBinding( DefaultParameterSetName = 'erDiagram' )] param ( # The mermaid diagram type. [Parameter( Mandatory, ParameterSetName = 'flowchart', Position = 0 )] [switch] $Flowchart, [Parameter( Mandatory, ParameterSetName = 'erDiagram', Position = 0 )] [switch] $ErDiagram, [Parameter( Mandatory, ParameterSetName = 'C4Component', Position = 0 )] [switch] $C4Component, # The diagram orientation. [Parameter( ParameterSetName = 'flowchart', Position = 1 )] [ValidateSet('top-to-bottom', 'top-down', 'bottom-to-top', 'right-to-left', 'left-to-right')] [string] $Orientation, # The diagram title. [Parameter( ParameterSetName = 'flowchart')] [Parameter( ParameterSetName = 'erDiagram')] [string] $Title ) $definition = [PSCustomObject]@{ Type = $PSCmdlet.ParameterSetName } switch ( $definition.Type ) { erDiagram { $definition | Add-Member Title $Title $definition | Add-Member Relations @() } flowchart { if ( $Title ) { $definition | Add-Member Title $Title } if ( $Orientation ) { $definition | Add-Member Orientation $Orientation } $definition | Add-Member Nodes @() $definition | Add-Member Links @() $definition | Add-Member Classes @() $definition | Add-Member Clicks @() } C4Component { $definition | Add-Member ContainerBoundaries @() $definition | Add-Member Relations @() } } Write-Output $definition } |