Get-PowerShellModuleUsingHashtable.ps1

function Get-PowerShellModuleUsingHashtable {
    <#
    .SYNOPSIS
    Gets a list of installed PowerShell modules for each entry in a hashtable.

    .DESCRIPTION
    The Get-PowerShellModuleUsingHashtable function steps through each entry in the
    supplied hashtable and gets a list of installed PowerShell modules for each entry.

    .PARAMETER ReferenceToHashtable
    Is a reference to a hashtable. The value of the reference should be a hashtable
    with keys that are the names of PowerShell modules and values that are initialized
    to be enpty arrays.

    .EXAMPLE
    $hashtableModuleNameToInstalledModules = @{}
    $hashtableModuleNameToInstalledModules.Add('PnP.PowerShell', @())
    $hashtableModuleNameToInstalledModules.Add('Microsoft.Graph.Authentication', @())
    $hashtableModuleNameToInstalledModules.Add('Microsoft.Graph.Groups', @())
    $hashtableModuleNameToInstalledModules.Add('Microsoft.Graph.Users', @())
    $refHashtableModuleNameToInstalledModules = [ref]$hashtableModuleNameToInstalledModules
    Get-PowerShellModuleUsingHashtable -ReferenceToHashtable $refHashtableModuleNameToInstalledModules

    This example gets the list of installed PowerShell modules for each of the four
    modules listed in the hashtable. The list of each respective module is stored in
    the value of the hashtable entry for that module.

    .OUTPUTS
    None
    #>

    #region License ################################################################
    # Copyright (c) 2024 Frank Lesniak
    #
    # Permission is hereby granted, free of charge, to any person obtaining a copy of
    # this software and associated documentation files (the "Software"), to deal in the
    # Software without restriction, including without limitation the rights to use,
    # copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
    # Software, and to permit persons to whom the Software is furnished to do so,
    # subject to the following conditions:
    #
    # The above copyright notice and this permission notice shall be included in all
    # copies or substantial portions of the Software.
    #
    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
    # FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
    # COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
    # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    #endregion License ################################################################

    #region DownloadLocationNotice  ################################################
    # The most up-to-date version of this script can be found on the author's GitHub
    # repository at https://github.com/franklesniak/PowerShell_Resources
    #endregion DownloadLocationNotice  ################################################

    # Version 1.0.20240401.0

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)][ref]$ReferenceToHashtable
    )

    $VerbosePreferenceAtStartOfFunction = $VerbosePreference

    $arrModulesToGet = @(($ReferenceToHashtable.Value).Keys)

    for ($intCounter = 0; $intCounter -lt $arrModulesToGet.Count; $intCounter++) {
        Write-Verbose ('Checking for ' + $arrModulesToGet[$intCounter] + ' module...')
        $VerbosePreference = [System.Management.Automation.ActionPreference]::SilentlyContinue
        ($ReferenceToHashtable.Value).Item($arrModulesToGet[$intCounter]) = @(Get-Module -Name ($arrModulesToGet[$intCounter]) -ListAvailable)
        $VerbosePreference = $VerbosePreferenceAtStartOfFunction
    }
}