用户最后活跃时间

app/Console/Commands/SyncUserActivedAt.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Console\Commands;
+
+use Illuminate\Console\Command;
+use App\Models\User;
+
+class SyncUserActivedAt extends Command
+{
+    protected $signature = 'larabbs:sync-user-actived-at';
+    protected $description = '将用户最后登录时间从 Redis 同步到数据库中';
+
+    public function handle(User $user)
+    {
+        $user->syncUserActivedAt();
+        $this->info("同步成功！");
+    }
+}

app/Console/Kernel.php

@@ -27,9 +27,11 @@ protected function schedule(Schedule $schedule)
         // $schedule->command('inspire')
         //          ->hourly();
 
-
         // 一小时执行一次『活跃用户』数据生成的命令
         $schedule->command('larabbs:calculate-active-user')->hourly();
+
+        // 每日零时执行一次
+        $schedule->command('larabbs:sync-user-actived-at')->dailyAt('00:00');
     }
 
     /**

app/Http/Kernel.php

@@ -37,6 +37,10 @@ class Kernel extends HttpKernel
             \Illuminate\Routing\Middleware\SubstituteBindings::class,
 
             \App\Http\Middleware\EnsureEmailIsVerified::class,      // <<--- 只需添加这一行
+
+
+            // 记录用户最后活跃时间
+            \App\Http\Middleware\RecordLastActivedTime::class,
         ],
 
         'api' => [

app/Http/Middleware/RecordLastActivedTime.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Auth;
+
+class RecordLastActivedTime
+{
+    public function handle($request, Closure $next)
+    {
+        // 如果是登录用户的话
+        if (Auth::check()) {
+            // 记录最后登录时间
+            Auth::user()->recordLastActivedAt();
+        }
+
+        return $next($request);
+    }
+}

app/Models/Traits/LastActivedAtHelper.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace App\Models\Traits;
+
+use Redis;
+use Carbon\Carbon;
+
+trait LastActivedAtHelper
+{
+    // 缓存相关
+    protected $hash_prefix = 'larabbs_last_actived_at_';
+    protected $field_prefix = 'user_';
+
+    public function recordLastActivedAt()
+    {
+        // 获取今日 Redis 哈希表名称，如：larabbs_last_actived_at_2017-10-21
+        $hash = $this->getHashFromDateString(Carbon::now()->toDateString());
+
+        // 字段名称，如：user_1
+        $field = $this->getHashField();
+
+        // 当前时间，如：2017-10-21 08:35:15
+        $now = Carbon::now()->toDateTimeString();
+
+        // 数据写入 Redis ，字段已存在会被更新
+        Redis::hSet($hash, $field, $now);
+    }
+
+    public function syncUserActivedAt()
+    {
+        // 获取昨日的哈希表名称，如：larabbs_last_actived_at_2017-10-21
+        $hash = $this->getHashFromDateString(Carbon::yesterday()->toDateString());
+
+        // 从 Redis 中获取所有哈希表里的数据
+        $dates = Redis::hGetAll($hash);
+
+        // 遍历，并同步到数据库中
+        foreach ($dates as $user_id => $actived_at) {
+            // 会将 `user_1` 转换为 1
+            $user_id = str_replace($this->field_prefix, '', $user_id);
+
+            // 只有当用户存在时才更新到数据库中
+            if ($user = $this->find($user_id)) {
+                $user->last_actived_at = $actived_at;
+                $user->save();
+            }
+        }
+
+        // 以数据库为中心的存储，既已同步，即可删除
+        Redis::del($hash);
+    }
+
+    public function getLastActivedAtAttribute($value)
+    {
+        // 获取今日对应的哈希表名称
+        $hash = $this->getHashFromDateString(Carbon::now()->toDateString());
+
+        // 字段名称，如：user_1
+        $field = $this->getHashField();
+
+        // 三元运算符，优先选择 Redis 的数据，否则使用数据库中
+        $datetime = Redis::hGet($hash, $field) ? : $value;
+
+        // 如果存在的话，返回时间对应的 Carbon 实体
+        if ($datetime) {
+            return new Carbon($datetime);
+        } else {
+        // 否则使用用户注册时间
+            return $this->created_at;
+        }
+    }
+
+    public function getHashFromDateString($date)
+    {
+        // Redis 哈希表的命名，如：larabbs_last_actived_at_2017-10-21
+        return $this->hash_prefix . $date;
+    }
+
+    public function getHashField()
+    {
+        // 字段名称，如：user_1
+        return $this->field_prefix . $this->id;
+    }
+}

app/Models/User.php

@@ -15,6 +15,7 @@ class User extends Authenticatable implements MustVerifyEmailContract
     use HasRoles;
     use MustVerifyEmailTrait;
     use Traits\ActiveUserHelper;
+    use Traits\LastActivedAtHelper;
 
     use Notifiable {
         notify as protected laravelNotify;

database/migrations/2019_09_20_123036_add_last_actived_at_to_users_table.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddLastActivedAtToUsersTable extends Migration
+{
+    public function up()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->timestamp('last_actived_at')->nullable();
+        });
+    }
+
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn('last_actived_at');
+        });
+    }
+}

resources/views/users/show.blade.php

@@ -10,11 +10,11 @@
     <div class="card ">
       <img class="card-img-top" src="{{ $user->avatar }}" alt="{{ $user->name }}">
       <div class="card-body">
-        <h5><strong>个人简介</strong></h5>
-        <p>{{ $user->introduction }}</p>
-        <hr>
         <h5><strong>注册于</strong></h5>
         <p>{{ $user->created_at->diffForHumans() }}</p>
+        <hr>
+        <h5><strong>最后活跃</strong></h5>
+        <p title="{{  $user->last_actived_at }}">{{ $user->last_actived_at->diffForHumans() }}</p>
       </div>
     </div>
   </div>