pixelfed/app/Http/Controllers/Api/V1/DomainBlockController.php

<?php

namespace App\Http\Controllers\Api\V1;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Models\UserDomainBlock;
use App\Util\ActivityPub\Helpers;
use App\Services\UserFilterService;
use Illuminate\Bus\Batch;
use Illuminate\Support\Facades\Bus;
use Illuminate\Support\Facades\Cache;
use App\Jobs\HomeFeedPipeline\FeedRemoveDomainPipeline;
use App\Jobs\ProfilePipeline\ProfilePurgeNotificationsByDomain;
use App\Jobs\ProfilePipeline\ProfilePurgeFollowersByDomain;

class DomainBlockController extends Controller
{
    public function json($res, $code = 200, $headers = [])
    {
        return response()->json($res, $code, $headers, JSON_UNESCAPED_SLASHES);
    }

    public function index(Request $request)
    {
        abort_if(!$request->user(), 403);

        $this->validate($request, [
            'limit' => 'sometimes|integer|min:1|max:200'
        ]);
        $limit = $request->input('limit', 100);
        $id = $request->user()->profile_id;
        $filters = UserDomainBlock::whereProfileId($id)->orderByDesc('id')->cursorPaginate($limit);
        $links = null;
        $headers = [];

        if($filters->nextCursor()) {
            $links .= '<'.$filters->nextPageUrl().'&limit='.$limit.'>; rel="next"';
        }

        if($filters->previousCursor()) {
            if($links != null) {
                $links .= ', ';
            }
            $links .= '<'.$filters->previousPageUrl().'&limit='.$limit.'>; rel="prev"';
        }

        if($links) {
            $headers = ['Link' => $links];
        }
        return $this->json($filters->pluck('domain'), 200, $headers);
    }

    public function store(Request $request)
    {
        abort_if(!$request->user(), 403);

        $this->validate($request, [
            'domain' => 'required|min:1|max:120'
        ]);

        $pid = $request->user()->profile_id;

        $domain = trim($request->input('domain'));

        if(Helpers::validateUrl($domain) == false) {
            return abort(500, 'Invalid domain or already blocked by server admins');
        }

        $domain = strtolower(parse_url($domain, PHP_URL_HOST));

        abort_if(config_cache('pixelfed.domain.app') == $domain, 400, 'Cannot ban your own server');

        $existingCount = UserDomainBlock::whereProfileId($pid)->count();
        $maxLimit = (int) config_cache('instance.user_filters.max_domain_blocks');
        $errorMsg =  __('profile.block.domain.max', ['max' => $maxLimit]);

        abort_if($existingCount >= $maxLimit, 400, $errorMsg);

        $block = UserDomainBlock::updateOrCreate([
            'profile_id' => $pid,
            'domain' => $domain
        ]);

        if($block->wasRecentlyCreated) {
            Bus::batch([
                [
                    new FeedRemoveDomainPipeline($pid, $domain),
                    new ProfilePurgeNotificationsByDomain($pid, $domain),
                    new ProfilePurgeFollowersByDomain($pid, $domain)
                ]
            ])->allowFailures()->onQueue('feed')->dispatch();

            Cache::forget('profile:following:' . $pid);
            UserFilterService::domainBlocks($pid, true);
        }

        return $this->json([]);
    }

    public function delete(Request $request)
    {
        abort_if(!$request->user(), 403);

        $this->validate($request, [
            'domain' => 'required|min:1|max:120'
        ]);

        $pid = $request->user()->profile_id;

        $domain = strtolower(trim($request->input('domain')));

        $filters = UserDomainBlock::whereProfileId($pid)->whereDomain($domain)->delete();

        UserFilterService::domainBlocks($pid, true);

        return $this->json([]);
    }
}