code/Vegetables.ps1
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. $PSScriptRoot\vegetable-class.ps1 #region some functions for working with vegetable objects Function Get-Vegetable { [cmdletbinding()] [OutputType("PSTeachingTools.PSVegetable")] [alias("gveg")] Param( [Parameter( Position = 0, ValueFromPipeline, ValueFromPipelineByPropertyName )] [string]$Name, [switch]$RootOnly ) Begin { Write-Verbose "[BEGIN ] Starting: $($MyInvocation.Mycommand)" } Process { #verify the myvegetables array exists if ( $global:myvegetables.count -gt 0) { Write-Verbose "[PROCESS] Processing $($global:myvegetables.count) items." if ($name -AND $RootOnly) { Write-Verbose "[PROCESS] Getting vegetable $name where it is a root vegetable" ($global:myvegetables).where( { ($_.IsRoot) -And ($_.name -like $name) }) # $global:myvegetables | where {($_.IsRoot) -And ($_.name -like $name)} } elseif ($Name) { Write-Verbose "[PROCESS] Getting vegetable $name" $result = ($global:myvegetables).where( { $_.name -like $name }) if ($result) { $result } else { Throw "Can't find a vegetable with the name $Name" } } elseif ($RootOnly) { Write-Verbose "[PROCESS] Getting root vegetables only" ($global:myvegetables).where( { $_.IsRoot }) } else { Write-Verbose "[PROCESS] Getting all vegetables" $global:myvegetables } } #if myvegetables else { Write-Warning "Failed to find vegetable source." } } #Process End { Write-Verbose "[END ] Ending: $($MyInvocation.Mycommand)" } } Function Set-Vegetable { [cmdletbinding(SupportsShouldProcess, DefaultParameterSetName = "name")] [OutputType("None", "PSTeachingTools.PSVegetable")] [Alias("sveg")] Param( [Parameter( Position = 0, ValueFromPipeline, ParameterSetName = "input" )] [PSTeachingTools.PSVegetable[]]$InputObject, [Parameter( Position = 0, ValueFromPipeline, ValueFromPipelineByPropertyName, ParameterSetName = "name" )] [string]$Name, [Parameter(ValueFromPipelineByPropertyName)] [int]$Count, [Parameter(ValueFromPipelineByPropertyName)] [alias("state")] [PSTeachingTools.VegStatus]$CookingState, [switch]$Passthru ) Begin { Write-Verbose "[BEGIN ] Starting: $($MyInvocation.Mycommand)" } #begin Process { Write-Verbose "[PROCESS] Detected parameter set $($pscmdlet.ParameterSetName)" if ($PSCmdlet.ParameterSetName -eq 'name') { $inputObject = $global:myvegetables.Where( { $_.Name -like $Name }) if (-Not $inputObject) { Write-Warning "Failed to find a vegetable called $name" } } If ($InputObject) { foreach ($item in $InputObject) { Write-Verbose "[PROCESS] Modifying $($item.name)" if ($PSCmdlet.ShouldProcess($item.name)) { if ($CookingState) { Write-Verbose "[PROCESS] Updating cooking state to $cookingstate" $item.Prepare($CookingState) } if ($count) { Write-Verbose "[PROCESS] Updating count to $count" $item.count = $count } if ($Passthru) { $item } } } #foreach } #if input } End { Write-Verbose "[END ] Ending: $($MyInvocation.Mycommand)" } #end } Function New-Vegetable { [cmdletbinding(SupportsShouldProcess)] [OutputType("none", "PSTeachingTools.PSVegetable")] [alias("nveg")] Param( [Parameter( Position = 0, Mandatory, HelpMessage = "What is the vegetable name?", ValueFromPipelineByPropertyName )] [ValidateNotNullorEmpty()] [string]$Name, [Parameter( Position = 1, Mandatory, HelpMessage = "What is the vegetable color?", ValueFromPipelineByPropertyName )] [ValidateNotNullorEmpty()] [PSTeachingTools.VegColor]$Color, [Parameter(ValueFromPipelineByPropertyName)] [ValidateRange(1, 20)] [int]$Count = 1, [Parameter(ValueFromPipelineByPropertyName)] [alias("IsRoot")] [switch]$Root, [Parameter( Mandatory, HelpMessage = "Enter a valid PLU code", ValueFromPipelineByPropertyName )] [int]$UPC, [switch]$Passthru ) Begin { Write-Verbose "[BEGIN ] Starting: $($MyInvocation.Mycommand)" } Process { if ($PSCmdlet.ShouldProcess($Name)) { Write-Verbose "[PROCESS] Creating $name" $veggie = [PSTeachingTools.PSVegetable]::new($name, $Root, $color, $UPC) if ($veggie) { $veggie.count = $Count Write-Verbose "Adding to global listget-v" $global:myvegetables.Add($veggie) if ($passthru) { Write-Output $veggie } } else { Write-Warning "Oops. Something unexpected happened." } } #should process } #process End { Write-Verbose "[END ] Ending: $($MyInvocation.Mycommand)" } #end } Function Remove-Vegetable { [cmdletbinding(SupportsShouldProcess)] [OutputType("none", "PSTeachingTools.PSVegetable")] [Alias("rveg")] Param( [Parameter( Position = 0, ValueFromPipeline, ParameterSetName = "input" )] [PSTeachingTools.PSVegetable[]]$InputObject, [Parameter( Position = 0, ValueFromPipeline, ValueFromPipelineByPropertyName, ParameterSetName = "name" )] [string]$Name, [Parameter(HelpMessage = "Write the removed object to the pipeline")] [switch]$Passthru ) Begin { Write-Verbose "[$((Get-Date).TimeofDay) BEGIN ] Starting $($myinvocation.mycommand)" } #begin Process { if ($PSCmdlet.ParameterSetName -eq 'name') { $inputObject = $global:myvegetables.Where( { $_.Name -like $Name }) if (-Not $inputObject) { Write-Warning "Failed to find a vegetable called $name" } } If ($InputObject) { foreach ($item in $InputObject) { Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Removing $($item.name)" if ($PSCmdlet.ShouldProcess($item.name)) { [void]($global:myvegetables.remove($item)) if ($passthru) { $item } } #WhatIf } #foreach item } #if inputobject } #process End { Write-Verbose "[$((Get-Date).TimeofDay) END ] Ending $($myinvocation.mycommand)" } #end } #close Remove-Vegetable #endregion #create an argument completer for a subset of vegetable commands $verbs = "Get","Set","Remove" foreach ($verb in $verbs) { Register-ArgumentCompleter -CommandName "$verb-Vegetable" -ParameterName Name -ScriptBlock { param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter) #PowerShell code to populate $wordtoComplete $global:myvegetables.name | Where-Object { $_ -Like "$WordToComplete*" } | ForEach-Object { # completion text,listitem text,result type,Tooltip [System.Management.Automation.CompletionResult]::new($_, $_, 'ParameterValue', $_) } } } |