public function up(){if (!Schema::hasTable('black_feeds')) {Schema::create('black_feeds', function (Blueprint $table) {$table->integer('user_id')->unsigned()->comment('main user');$table->integer('target_id')->unsigned()->comment('blacked user id');$table->timestamps();$table->index('user_id');});}DB::statement("alter table `black_feeds` comment'拉黑动态用户表'");//表注释}

/** 动态加入黑名单.* @Author   Wayne* @DateTime 2018-04-17* @Email    qiaobin@zhiyicx.com* @param    Request             $request [description]* @param    UserModel           $user    [description]* @return   [type]                       [description]*/public function black(Request $request, UserModel $targetUser, UserBlackFeedModel $blackList){$target_id = $targetUser->id;$user_id = $request->user()->id;if ($target_id === $user_id) {return response()->json(['message' => '不能将自己加入黑名单'], 422);}$record = $blackList->where(['user_id' => $user_id, 'target_id' => $target_id])->first();if (! $record) {$record = new UserBlackFeedModel();$record->user_id = $user_id;$record->target_id = $target_id;}$record->save();$cacheKey = sprintf('user-feeded:%s,%s', $target_id, $user_id);Cache::forever($cacheKey, true);return response()->json(['message' => '操作成功'], 201);}

/*** 动态移出黑名单.* @Author   Wayne* @DateTime 2018-04-17* @Email    qiaobin@zhiyicx.com* @param    Request             $request [description]* @param    UserModel           $user    [description]* @return   [type]                       [description]*/public function unBlack(Request $request, UserModel $targetUser, UserBlackFeedModel $blackList){$target_id = $targetUser->id;$user_id = $request->user()->id;if ($target_id === $user_id) {return response()->json(['message' => '不能对自己进行操作'], 422);}$blackList->where(['user_id' => $user_id, 'target_id' => $target_id])->delete();$cacheKey = sprintf('user-feeded:%s,%s', $target_id, $user_id);Cache::forget($cacheKey);return response()->json('', 204);}

public function blackList(Request $request){$user = $request->user();$offset = $request->input('offset', 0);$limit = $request->input('limit', 15);$blacks = $user->blackfeeds()->with('user')->latest()->limit($limit)->offset($offset)->get();$blacks = $blacks->map(function ($black) use ($user) {$black->user->blackfeeded = true;return $black->user;});return response()->json($blacks, 200);}

<?php
declare(strict_types=1);

namespace Zhiyi\Plus\Models\Relations;use Zhiyi\Plus\Models\User;
use Zhiyi\Plus\Models\BlackFeeds;
use Illuminate\Support\Facades\Cache;trait UserHasBlackFeeds
{/*** get blacklists of current user.* @Email    qiaobin@zhiyicx.com* @return   [type]              [description]*/public function blackfeeds(){return $this->hasMany(BlackFeeds::class, 'user_id', 'id');}/*** is user blacked by current_user.* @Email    qiaobin@zhiyicx.com* @param    [type]              $user [description]* @return   [type]                    [description]*/public function blackfeeded($user): bool{if ($user instanceof User) {$user = $user->id;}$cacheKey = sprintf('user-feeded:%s,%s', $user, $this->id);if (Cache::has($cacheKey)) {return Cache::get($cacheKey);}$status = $this->blackfeeds()->where('target_id', $user)->first() !== null;Cache::forever($cacheKey, $status);return $status;}
}

public function blackfeeds(){return $this->hasMany(BlackFeeds::class, 'target_id', 'user_id');}

$limit = $request->query('limit', 10);$after = $request->query('after');

if (is_null($user = $request->user('api'))) {   abort(401);}$user_id=$request->user('api')->id;

$feedModel->whereDoesntHave('blackfeeds', function ($query) use ($user_id) {return $query->where('user_id', $user_id);})            ->orderBy('id', 'desc')->when((bool) $after, function ($query) use ($after) {return $query->where('id', '<', $after);})->limit($limit)->get();