Add Mutual Followers API endpoint

app/Http/Controllers/Api/ApiV1Dot1Controller.php

@@ -20,6 +20,7 @@ use App\StatusArchived;
 use App\User;
 use App\UserSetting;
 use App\Services\AccountService;
+use App\Services\FollowerService;
 use App\Services\StatusService;
 use App\Services\ProfileStatusService;
 use App\Services\LikeService;
@@ -897,4 +898,19 @@ class ApiV1Dot1Controller extends Controller
 
         return [200];
     }
+
+    public function getMutualAccounts(Request $request, $id)
+    {
+        abort_if(!$request->user(), 403);
+        $account = AccountService::get($id, true);
+        if(!$account || !isset($account['id'])) { return []; }
+        $res = collect(FollowerService::mutualAccounts($request->user()->profile_id, $id))
+            ->map(function($accountId) {
+                return AccountService::get($accountId, true);
+            })
+            ->filter()
+            ->take(24)
+            ->values();
+        return $this->json($res);
+    }
 }

app/Services/FollowerService.php

@@ -20,6 +20,7 @@ class FollowerService
     const FOLLOWING_KEY = 'pf:services:follow:following:id:';
     const FOLLOWERS_KEY = 'pf:services:follow:followers:id:';
     const FOLLOWERS_LOCAL_KEY = 'pf:services:follow:local-follower-ids:';
+    const FOLLOWERS_INTER_KEY = 'pf:services:follow:followers:inter:id:';
 
     public static function add($actor, $target, $refresh = true)
     {
@@ -205,6 +206,22 @@ class FollowerService
         });
     }
 
+    public static function mutualAccounts($actorId, $profileId)
+    {
+        if($actorId == $profileId) {
+            return [];
+        }
+        $actorKey = self::FOLLOWING_KEY . $actorId;
+        $profileKey = self::FOLLOWERS_KEY . $profileId;
+        $key = self::FOLLOWERS_INTER_KEY . $actorId . ':' . $profileId;
+        $res = Redis::zinterstore($key, [$actorKey, $profileKey]);
+        if($res) {
+            return Redis::zrange($key, 0, -1);
+        } else {
+            return [];
+        }
+    }
+
     public static function delCache($id)
     {
         Redis::del(self::CACHE_KEY . $id);

routes/api.php

@@ -111,12 +111,9 @@ Route::group(['prefix' => 'api'], function() use($middleware) {
     });
 
     Route::group(['prefix' => 'v1.1'], function() use($middleware) {
-        $reportMiddleware = $middleware;
-        $reportMiddleware[] = DeprecatedEndpoint::class;
-        Route::post('report', 'Api\ApiV1Dot1Controller@report')->middleware($reportMiddleware);
+        Route::post('report', 'Api\ApiV1Dot1Controller@report')->middleware($middleware);
 
         Route::group(['prefix' => 'accounts'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('timelines/home', 'Api\ApiV1Controller@timelineHome')->middleware($middleware);
             Route::delete('avatar', 'Api\ApiV1Dot1Controller@deleteAvatar')->middleware($middleware);
             Route::get('{id}/posts', 'Api\ApiV1Dot1Controller@accountPosts')->middleware($middleware);
@@ -125,10 +122,10 @@ Route::group(['prefix' => 'api'], function() use($middleware) {
             Route::get('two-factor', 'Api\ApiV1Dot1Controller@accountTwoFactor')->middleware($middleware);
             Route::get('emails-from-pixelfed', 'Api\ApiV1Dot1Controller@accountEmailsFromPixelfed')->middleware($middleware);
             Route::get('apps-and-applications', 'Api\ApiV1Dot1Controller@accountApps')->middleware($middleware);
+            Route::get('mutuals/{id}', 'Api\ApiV1Dot1Controller@getMutualAccounts')->middleware($middleware);
         });
 
         Route::group(['prefix' => 'collections'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('accounts/{id}', 'CollectionController@getUserCollections')->middleware($middleware);
             Route::get('items/{id}', 'CollectionController@getItems')->middleware($middleware);
             Route::get('view/{id}', 'CollectionController@getCollection')->middleware($middleware);
@@ -139,7 +136,6 @@ Route::group(['prefix' => 'api'], function() use($middleware) {
         });
 
         Route::group(['prefix' => 'direct'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('thread', 'DirectMessageController@thread')->middleware($middleware);
             Route::post('thread/send', 'DirectMessageController@create')->middleware($middleware);
             Route::delete('thread/message', 'DirectMessageController@delete')->middleware($middleware);
@@ -151,19 +147,16 @@ Route::group(['prefix' => 'api'], function() use($middleware) {
         });
 
         Route::group(['prefix' => 'archive'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::post('add/{id}', 'Api\ApiV1Dot1Controller@archive')->middleware($middleware);
             Route::post('remove/{id}', 'Api\ApiV1Dot1Controller@unarchive')->middleware($middleware);
             Route::get('list', 'Api\ApiV1Dot1Controller@archivedPosts')->middleware($middleware);
         });
 
         Route::group(['prefix' => 'places'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('posts/{id}/{slug}', 'Api\ApiV1Dot1Controller@placesById')->middleware($middleware);
         });
 
         Route::group(['prefix' => 'stories'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('carousel', 'Stories\StoryApiV1Controller@carousel')->middleware($middleware);
             Route::post('add', 'Stories\StoryApiV1Controller@add')->middleware($middleware);
             Route::post('publish', 'Stories\StoryApiV1Controller@publish')->middleware($middleware);
@@ -173,20 +166,17 @@ Route::group(['prefix' => 'api'], function() use($middleware) {
         });
 
         Route::group(['prefix' => 'compose'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('search/location', 'ComposeController@searchLocation')->middleware($middleware);
             Route::get('settings', 'ComposeController@composeSettings')->middleware($middleware);
         });
 
         Route::group(['prefix' => 'discover'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('accounts/popular', 'Api\ApiV1Controller@discoverAccountsPopular')->middleware($middleware);
             Route::get('posts/trending', 'DiscoverController@trendingApi')->middleware($middleware);
             Route::get('posts/hashtags', 'DiscoverController@trendingHashtags')->middleware($middleware);
         });
 
         Route::group(['prefix' => 'directory'], function () use($middleware) {
-            $middleware[] = DeprecatedEndpoint::class;
             Route::get('listing', 'PixelfedDirectoryController@get');
         });