Find all Azure Resources that include all tags given

Find-AzResourceByTags.ps1

<#   
.SYNOPSIS   
    Find Azure Resources with all the given tags
   
.DESCRIPTION
    Will query for all resources using the given tags and return only those that have all tags specified
    Will return all resources found

.PARAMETER Tags
    A hashtable of key/value pairs of the tags to query for

.EXAMPLE
    ./Find-AzResourceByTags -Tags @{ "Application" = "demo"; "Environment" = "dev" }

.NOTES   
    Author: Roberto Mardeni   
    Last Updated: 09/24/2021
#>
param
(
    # HashTable with all the tags to filter by
    [parameter(Mandatory = $true)]  
    [HashTable] $Tags
)

$ErrorActionPreference = "Stop"

$resources = $null

$Tags.keys | ForEach-Object {
    $key = $_
    $value = $Tags[$key]
    if ($resources -eq $null) {
        $resources = Get-AzResource -Tag @{ $_ = $value }
    } else {
        $resources = $resources | Where-Object { $_.Tags.ContainsKey($key) -and $_.Tags[$key] -eq $value }
    }
}

$resources