Public/Install-specModule.ps1

Function Install-specModule {
    <#
    .SYNOPSIS
        Installs one or more specified PowerShell modules.
 
    .DESCRIPTION
        The Install-specModule function installs PowerShell modules from the PowerShell Gallery (or other registered repositories).
        It performs the following actions:
         * Checks if a module is already installed.
         * Prompts for confirmation before installation (SupportsShouldProcess).
         * Installs the module using Install-Module.
         * Verifies installation success.
 
    .PARAMETER moduleName
        One or more PowerShell module names. Module names can be provided as:
           * A single string
           * An array of strings
           * Pipeline input
 
    .PARAMETER version
        If specified, attempts to install the given version number of the module.
 
    .PARAMETER currentUser
        Installs the module for the current user only. Does not require administrative permissions.
 
    .PARAMETER AcceptLicense
        Automatically accepts license agreements during installation.
 
    .EXAMPLE
        Install-specModule -moduleName AzureAD
 
        Installs the latest version of the 'AzureAD' module. Requires administrative permissions.
 
    .EXAMPLE
        Install-specModule -moduleName DHCPServer -version 1.0.5
 
        Installs version 1.0.5 of the 'DHCPServer' module.
 
    .EXAMPLE
        "AzureAD", "ExchangeOnlineManagement" | Install-specModule -currentUser -AcceptLicense
 
        Uses pipeline input to install 'AzureAD' and 'ExchangeOnlineManagement' modules for the current user,
        automatically accepting license agreements.
 
    .NOTES
        * 1.0.0 - owen.heaume - Initial release
    #>


    [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = 'Low')]
    Param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [string[]]$ModuleName,

        [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)]
        [string]$Version,

        [switch]$CurrentUser,

        [switch]$AcceptLicense
    )

    Begin {
    }

    Process {
        foreach ($module in $ModuleName) {
            try {
                Write-Host "Attempting to install module '$module'" -ForegroundColor DarkCyan

                if ($PSCmdlet.ShouldProcess("'$module'", "Install-Module")) {
                    $installParams = @{
                        Name        = $module
                        Force       = $true
                        ErrorAction = 'Stop'
                    }

                    if ($currentUser.IsPresent) {
                        $installParams['Scope'] = 'CurrentUser'
                    } else {
                        $installParams['Scope'] = 'AllUsers'
                    }

                    if ($AcceptLicense.IsPresent) {
                        $installParams['AcceptLicense'] = $true
                    }

                    if ($version) {
                        $installParams['RequiredVersion'] = $version
                    }

                    Write-Host "Installing module using parameters:" -ForegroundColor DarkGray
                    $installParams
                    Install-Module @installParams
                    Write-Host "Module '$module' has been installed`n" -ForegroundColor DarkGreen

                }
            } catch {
                Write-Error "An unexpected error occurred: $_"
            }
        }
    }

    End {
    }
}