module/nodejs-test.psm1

#Requires -PSEdition Core
#Requires -Version 7.2
[Boolean]$EnvironmentResult = $False
[Boolean]$EnvironmentTested = $False
[SemVer]$NodeJsMinimumVersion = [SemVer]::Parse('14.15.0')
[RegEx]$SemVerRegEx = '^v?\d+\.\d+\.\d+$'
<#
.SYNOPSIS
GitHub Actions - Test NodeJS Environment
.DESCRIPTION
Test the current machine whether has compatible NodeJS environment; Test result always cache for reuse.
.PARAMETER Retest
Whether to redo this test by ignore the cached test result.
.OUTPUTS
[Boolean] Test result.
#>

Function Test-NodeJsEnvironment {
    [CmdletBinding()]
    [OutputType([Boolean])]
    Param (
        [Alias('Reinstall', 'ReinstallDependency', 'ReinstallPackage', 'ReinstallPackages')][Switch]$ReinstallDependencies,# Deprecated, keep as legacy.
        [Alias('Redo')][Switch]$Retest
    )
    If ($EnvironmentTested -and !$Retest.IsPresent) {
        Write-Verbose -Message 'Previously tested NodeJS environment; Return previous result.'
        Write-Output -InputObject $EnvironmentResult
        Return
    }
    $Script:EnvironmentResult = $False
    $Script:EnvironmentTested = $False
    Try {
        Get-Command -Name 'node' -CommandType 'Application' -ErrorAction 'Stop' |# `Get-Command` will throw error when nothing is found.
            Out-Null# No need the result.
        [String]$ExpressionNodeJsVersionResult = node --no-deprecation --no-warnings --version |
            Join-String -Separator "`n"
        If (
            $ExpressionNodeJsVersionResult -inotmatch $SemVerRegEx -or
            $NodeJsMinimumVersion -igt [SemVer]::Parse(($ExpressionNodeJsVersionResult -ireplace '^v', ''))
        ) {
            Throw
        }
    }
    Catch {
        $Script:EnvironmentResult = $False
        $Script:EnvironmentTested = $True
        Write-Output -InputObject $EnvironmentResult
        Return
    }
    $Script:EnvironmentResult = $True
    $Script:EnvironmentTested = $True
    Write-Output -InputObject $EnvironmentResult
}
Export-ModuleMember -Function @(
    'Test-NodeJsEnvironment'
)