$waifu = Read-Host -Prompt "Waifu name?"
$waifu_path = "waifus\$waifu"

if (-not (Test-Path $waifu_path))
{
    mkdir "waifus\$waifu" | Out-Null

    $full_page = $true
    $match_count = 0
    $page = 0

    while($full_page -and $page -lt 3)
    {

        $start_page_id = 42 * $page

        $main_url_base = "https://gelbooru.com/index.php?page=post&s=list&tags=$waifu+rating%3aexplicit+sort%3ascore%3adesc+-animated_gif+-animated+-webm+solo+-absurdres&pid=$start_page_id"

        $response = Invoke-WebRequest $main_url_base

        ($response.Content | Select-String -Pattern 'js-pop" id="p.\d*" href="(.*?)"' -AllMatches).Matches.Value |
        % {
            $_ -match 'js-pop" id="p.\d*" href="(.*?)"' | Out-Null

            $match_count = ($match_count + 1);
            $url = "https:" + ($Matches[1] -replace "amp;","")
            $response = Invoke-WebRequest $url

            $response.Content -match 'href="(https://img2.gelbooru.com/images/.*?\.(.*?))"' | Out-Null

            $out_path = "$waifu_path\$match_count." + $Matches[2]

            $img = Invoke-WebRequest $Matches[1] -OutFile $out_path
        }
        $page++

        $full_page = $match_count -eq 42
    }
}

.\waifu_solitaire.exe