public function indexQuestions(Request $request, ResponseFactoryContract $response, QuestionModel $questionModel)    {        $userID = $request->user('api')->id ?? 0;        $limit = max(1, min(30, $request->query('limit', 15)));        $offset = max(0, $request->query('offset', 0));        $subject = $request->query('subject');      //问题主题        $topic_id = $request->query('topic_id');      //话题id        if(!$topic_id){            return response()->json(['message' => ['话题id必须给出']], 422);        }        //话题关联问题id        $questions_id=QuestionTopic::where('topic_id',$topic_id)->pluck('question_id');        if(!$questions_id){            return response()->json([], 200);        }else{            $questions_id=$questions_id->toArray();        }        $map = [            'all' => function ($query) {                $query->orderBy('id', 'desc');            },            'new' => function ($query) {                $query->where('answers_count', 0)                    ->orderBy('id', 'desc');            },            'hot' => function ($query) use ($questionModel) {                $query->whereBetween('created_at', [                    $questionModel->freshTimestamp()->subMonth(1),                    $questionModel->freshTimestamp(),                ])->where('answers_count', '!=', 0);                $query->orderBy('answers_count', 'desc');            },            'reward' => function ($query) {                $query->where('amount', '!=', 0)                    ->orderBy('id', 'desc');            },            'excellent' => function ($query) {                $query->where('excellent', '!=', 0)                    ->orderBy('id', 'desc');            },            'follow' => function ($query) use ($userID) {                $query->whereExists(function ($query) use ($userID) {                    $query->from('question_watcher')                        ->where('question_watcher.user_id', '=', $userID)                        ->whereRaw('question_watcher.question_id = questions.id');                });            },        ];        $type = in_array($type = $request->query('type', 'all'), array_keys($map)) ? $type : 'all';        call_user_func($map[$type], $query = $questionModel            ->whereDoesntHave('blacks', function ($query) use ($userID) {                $query->where('user_id', $userID);            })            ->when($subject, function ($query) use ($subject) {                return $query->where('subject', 'like', '%'.$subject.'%');            })            ->whereIn('id',$questions_id)            ->limit($limit)            ->offset($offset));        $questions = $query->get();        $questions->load('user');        return $response->json($questions->map(function (QuestionModel $question) use ($userID) {            //作者匿名            if ($question->anonymity && $question->user_id !== $userID) {                $question->addHidden('user');                $question->user_id = 0;            }            $question->answer = $question->answers()                ->whereDoesntHave('blacks', function ($query) use ($userID) {                    $query->where('user_id', $userID);                })                ->with('user')                ->orderBy('id', 'desc')                ->first();            if ($question->answer) {                if ($question->answer->anonymity && $question->answer->user_id !== $userID) {                    $question->answer->addHidden('user');                    $question->answer->user_id = 0;                }                $question->answer->liked = (bool) $question->answer->liked($userID);                $question->answer->collected = (bool) $question->answer->collected($userID);                $question->answer->rewarded = (bool) $question->answer->rewarders()->where('user_id', $userID)->first();                $question->look && $question->answer->could = true;                if ($question->look && $question->answer->invited && (! $question->answer->onlookers()->where('user_id', $userID)->first()) && $question->answer->user_id !== $userID && $question->user_id !== $userID) {                    $question->answer->could = false;                    $question->answer->body = null;                }            }            return $question;        }))->setStatusCode(200);    }