Rename Photos Downloaded from Google Photos Using Takeout

GooglePhotosTakeoutRenamer.ps1

#Google Photos File Renamer:
#just a quick script to rename your jpg's downloaded from google photos after their subfolder's name
#(the date they were uploaded if you used Google Takeout) while adding an incrementing number
#ie: "(1)" like explorer does if the filename already exists

#Path to Google Photos directory (should have subdirectories named as dates)
$path = Get-ChildItem -Path "D:\Downloads\Takeout\Google Photos"

#Loop through the subfolders
foreach ($folder in $path) {
    #get the name of the current subfolder which we will use to rename the files inside
    $name = $folder.PSChildName
    #reset the counter to null
    $i = $null
    #spit out the current folder name so we know where we are
    $name

    #Get the jpeg's in the current subfolder
    $jpg = Get-ChildItem -Path $folder | where { $_.Extension -eq ".jpg" -or $_.Extension -eq ".jpeg" }

    #Loop through the Jpg's
    foreach ($item in $jpg) {
        $oldName = $item.PSChildName
        #If the current jpg is already named correctly, move on
        if ($oldName -notmatch $name) {
            $oldFullName = $item.FullName
            $renamed = $false
            #make a version of the current filename with escaped brackets for regex:
            $testName = ($oldName -replace "\(","\(") -replace "\)","\)"
            #check if there is already a jpg named after the directory or not
            if (Test-Path ($oldFullName -replace $testName, "$name.jpg")) {
                #if this is the first number photo in the folder, set the counter to 1
                if($i -eq $null){$i = 1}
                #try adding a number at the end and keep incrementing it until you find a file name
                #that doesn't already exist
                while ($renamed -eq $false) {
                    if ((Test-Path ($oldFullName -replace $testName, "$name ($i).jpg"))) {
                        $i++
                    }
                    else {
                        #we found a number that doesn't already exist, rename it!
                        $item | rename-item -NewName "$name ($i).jpg"
                        $renamed = $true
                    }
                }
            }
            else {
                #There isn't already a jpg named after the directory, so rename it!
                $item | rename-item -NewName "$name.jpg"
            }
            #If we didn't need to add a number the new filename...
            if ($i -eq $null) {
                #Check if a related .json file exists, and if so rename it as well
                if (Test-Path "$oldFullName.json") {
                    Rename-Item -Path "$oldFullName.json" -NewName "$name.jpg.json"
                }
            }
            #if we did add a number to the new file name...
            else {
                #Check if a related .json file exists, and if so rename it as well
                if (Test-Path ("$oldFullName.json")) {
                    Rename-Item -Path "$oldFullName.json" -NewName "$name ($i).jpg.json"
                }
            }
        }
    }
}

Currently I have it scoped down to just JPG's, but there's no reason it couldn't also handle the other possible file types.