functions/public/Test-365ACPostalCode.ps1

<#
.SYNOPSIS
    Tests if users have a postal code assigned in their Microsoft 365 profiles.

.DESCRIPTION
    The Test-365ACPostalCode function checks each user retrieved from Microsoft 365 for a postal code value. It processes a list of users, determining whether each user has a postal code assigned. The results can be exported to an Excel file, an HTML file, or output directly.

.PARAMETER Users
    An array of users to be tested. This can be piped in or specified directly. Each user should have DisplayName and PostalCode properties.

.PARAMETER TenantID
    The ID of the tenant to connect to. Required if using app-only authentication.

.PARAMETER ClientID
    The ID of the client to use for app-only authentication. Required if using app-only authentication.

.PARAMETER CertificateThumbprint
    The thumbprint of the certificate to use for app-only authentication. Required if using app-only authentication.

.PARAMETER AccessToken
    The access token to use for authentication. Required if using app-only authentication.

.PARAMETER InteractiveLogin
    Specifies whether to use interactive login. If this switch is present, interactive login will be used. Otherwise, app-only authentication will be used.

.PARAMETER OutputExcelFilePath
    The file path where the Excel report will be saved. The file must have an .xlsx extension.

.PARAMETER OutputHtmlFilePath
    The file path where the HTML report will be saved. The file must have an .html extension.

.PARAMETER TestedProperty
    The property being tested. This is set to 'Has Postal Code' by default.

.EXAMPLE
    PS> $users = Get-MgUser -All -Property DisplayName, PostalCode | Select-Object DisplayName, PostalCode
    PS> Test-365ACPostalCode -Users $users -OutputExcelFilePath "C:\Reports\PostalCodeReport.xlsx"

    This example retrieves all users with their DisplayName and PostalCode, then tests each user to see if they have a postal code assigned. The results are exported to an Excel file.

.EXAMPLE
    PS> Get-MgUser -All -Property DisplayName, PostalCode | Select-Object DisplayName, PostalCode | Test-365ACPostalCode -OutputHtmlFilePath "C:\Reports\PostalCodeReport.html"

    This example pipes a list of users directly into Test-365ACPostalCode, which then checks if each user has a postal code assigned. The results are exported to an HTML file.

.NOTES
    This function requires the Microsoft Graph PowerShell SDK to retrieve user information from Microsoft 365.

.LINK
    https://github.com/DevClate/365AutomatedCheck

#>

Function Test-365ACPostalCode {
    [CmdletBinding()]
    param
    (
        [Parameter(ValueFromPipeline = $true)]
        [array]$Users = (Get-MgUser -All -Property DisplayName, PostalCode | Select-Object DisplayName, PostalCode),
        
        [Parameter(Mandatory = $false)]
        [string]$TenantID,
        
        [Parameter(Mandatory = $false)]
        [string]$ClientID,
        
        [Parameter(Mandatory = $false)]
        [string]$CertificateThumbprint,
        
        [Parameter(Mandatory = $false)]
        [string]$AccessToken,
        
        [Parameter(Mandatory = $false)]
        [switch]$InteractiveLogin,

        [ValidatePattern('\.xlsx$')]
        [string]$OutputExcelFilePath,
        
        [ValidatePattern('\.html$')]
        [string]$OutputHtmlFilePath,
        
        [string]$TestedProperty = 'Has Postal Code'
    )
    BEGIN {

        if ($InteractiveLogin) {
            Write-PSFMessage "Using interactive login..." -Level Host
            Connect-MgGraph -Scopes "User.Read.All", "AuditLog.read.All"  -NoWelcome
        }
        else {
            Write-PSFMessage "Using app-only authentication..." -Level Host
            Connect-MgGraph -ClientId $ClientID -TenantId $TenantID -CertificateThumbprint $CertificateThumbprint -Scopes "User.Read.All", "AuditLog.Read.All"
        }
        
        $results = @()
    }
    PROCESS {
        foreach ($user in $Users) {
            $hasPostalCode = [bool]($user.PostalCode)
            $result = [PSCustomObject]@{
                'User Display Name' = $user.DisplayName
                $TestedProperty     = $hasPostalCode
            }

            $results += $result
        }
    }
    END {
        $totalTests = $results.Count
        $passedTests = ($results | Where-Object { $_.$TestedProperty }).Count
        $failedTests = $totalTests - $passedTests
        if ($OutputExcelFilePath) {
            Export-365ACResultToExcel -Results $results -OutputExcelFilePath $OutputExcelFilePath -TotalTests $totalTests -PassedTests $passedTests -FailedTests $failedTests -TestedProperty $TestedProperty
        }
        elseif ($OutputHtmlFilePath) {
            Export-365ACResultToHtml -Results $results -OutputHtmlFilePath $OutputHtmlFilePath -TotalTests $totalTests -PassedTests $passedTests -FailedTests $failedTests -TestedProperty $TestedProperty
        }
        else {
            Write-Output $results
        }
    }
}