Show "updated by at" on replies and threads

app/Concerns/HasEditLog.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Concerns;
+
+use App\Models\Edit;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Str;
+
+trait HasEditLog
+{
+    public static function bootHasEditLog()
+    {
+        static::updated(function ($model) {
+            Edit::create([
+                'author_id' => $model->author_id,
+                'editable_id' => $model->id,
+                'editable_type' => constant($model::class.'::TABLE') ?? $model::class,
+                'edited_at' => now(),
+            ]);
+
+            $cacheKey = sprintf('%s-%s', Str::slug($model::class), $model->id);
+            if (Cache::has($cacheKey)) {
+                Cache::forget($cacheKey);
+            }
+        });
+    }
+
+    public function edits(): MorphMany
+    {
+        return $this->morphMany(Edit::class, 'editable');
+    }
+
+    public function getLatestEditAttribute(): ?Edit
+    {
+        $cacheKey = sprintf('%s-%s', Str::slug($this::class), $this->id);
+
+        return Cache::rememberForever($cacheKey, function () {
+            return $this->edits()->latest('edited_at')->first();
+        });
+    }
+}

app/Models/Article.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Concerns\HasAuthor;
+use App\Concerns\HasEditLog;
 use App\Concerns\HasLikes;
 use App\Concerns\HasSlug;
 use App\Concerns\HasTags;
@@ -19,6 +20,7 @@ final class Article extends Model
 {
     use HasFactory;
     use HasAuthor;
+    use HasEditLog;
     use HasSlug;
     use HasLikes;
     use HasTimestamps;

app/Models/Edit.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use App\Concerns\HasAuthor;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Edit extends Model
+{
+    use HasAuthor;
+    use HasFactory;
+
+    protected $fillable = [
+        'author_id',
+        'editable_id',
+        'editable_type',
+        'edited_at',
+    ];
+
+    protected $dates = [
+        'edited_at',
+    ];
+
+    protected $with = [
+        'authorRelation',
+    ];
+
+    public $timestamps = false;
+
+    public function editable()
+    {
+        return $this->morphTo();
+    }
+}

app/Models/Reply.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Concerns\HasAuthor;
+use App\Concerns\HasEditLog;
 use App\Concerns\HasLikes;
 use App\Concerns\HasTimestamps;
 use Illuminate\Database\Eloquent\Builder;
@@ -16,6 +17,7 @@ final class Reply extends Model
 {
     use HasFactory;
     use HasAuthor;
+    use HasEditLog;
     use HasLikes;
     use HasTimestamps;
 

app/Models/Thread.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Concerns\HasAuthor;
+use App\Concerns\HasEditLog;
 use App\Concerns\HasLikes;
 use App\Concerns\HasSlug;
 use App\Concerns\HasTags;
@@ -30,6 +31,7 @@ final class Thread extends Model implements ReplyAble, SubscriptionAble, Feedabl
 {
     use HasFactory;
     use HasAuthor;
+    use HasEditLog;
     use HasLikes;
     use HasSlug;
     use HasTags;

database/factories/EditFactory.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\Article;
+use App\Models\Edit;
+use App\Models\Reply;
+use App\Models\Thread;
+use App\Models\User;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+class EditFactory extends Factory
+{
+    /**
+     * The name of the factory's corresponding model.
+     *
+     * @var string
+     */
+    protected $model = Edit::class;
+
+    /**
+     * Define the model's default state.
+     *
+     * @return array
+     */
+    public function definition()
+    {
+        $editableClass = $this->faker->randomElement([Article::class, Reply::class, Thread::class]);
+        $editableFactory = call_user_func([$editableClass, 'factory']);
+
+        return [
+            'author_id' => function () {
+                return User::factory()->create()->id;
+            },
+            'editable_id' => function () use ($editableFactory) {
+                return $editableFactory->create()->id;
+            },
+            'editable_type' => function () use ($editableClass) {
+                return constant($editableClass.'::TABLE') ?? $editableClass;
+            },
+            'edited_at' => $this->faker->dateTimeThisMonth(),
+        ];
+    }
+}

database/migrations/2021_11_05_194336_create_edits_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use App\Models\User;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateEditsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('edits', function (Blueprint $table) {
+            $table->id();
+
+            $table->foreignIdFor(User::class, 'author_id');
+
+            $table->unsignedBigInteger('editable_id');
+            $table->string('editable_type');
+
+            $table->timestamp('edited_at');
+        });
+    }
+}

resources/views/articles/show.blade.php

@@ -84,6 +84,14 @@ class="prose prose-lg text-gray-800 prose-lio"
                         <x-buk-markdown>{!! $article->body() !!}</x-buk-markdown>
                     </div>
 
+                    @if($article->latestEdit)
+                        <div class="text-sm text-gray-900 py-6">
+                            Last edit by
+                            <a href="{{ route('profile', $article->latestEdit->author()->username()) }}" class="text-lio-500 border-b-2 pb-0.5 border-lio-100 hover:text-lio-600">{{ $article->latestEdit->author()->name() }}</a>
+                            on {{ $article->latestEdit->edited_at->format('j M, Y') }}.
+                        </div>
+                    @endif
+
                     <div class="flex items-center gap-x-6 pt-6 pb-10">
                         <livewire:like-article :article="$article" :isSidebar="false" />
 

resources/views/components/threads/reply.blade.php

@@ -31,6 +31,14 @@ class="prose prose-lio max-w-none p-6 break-words"
     >
     </div>
 
+    @if($reply->latestEdit)
+        <div class="text-sm text-gray-900 p-6">
+            Last edit by
+            <a href="{{ route('profile', $reply->latestEdit->author()->username()) }}" class="text-lio-500 border-b-2 pb-0.5 border-lio-100 hover:text-lio-600">{{ $reply->latestEdit->author()->name() }}</a>
+            on {{ $reply->latestEdit->edited_at->format('j M, Y') }}.
+        </div>
+    @endif
+
     <div class="flex justify-between">
         <div class="px-6 pb-6">
             <livewire:like-reply :reply="$reply"/>

resources/views/components/threads/thread.blade.php

@@ -57,6 +57,14 @@ class="prose prose-lio max-w-none p-6 break-words"
     >
     </div>
 
+    @if($thread->latestEdit)
+        <div class="text-sm text-gray-900 p-6">
+            Last edit by
+            <a href="{{ route('profile', $thread->latestEdit->author()->username()) }}" class="text-lio-500 border-b-2 pb-0.5 border-lio-100 hover:text-lio-600">{{ $thread->latestEdit->author()->name() }}</a>
+            on {{ $thread->latestEdit->edited_at->format('j M, Y') }}.
+        </div>
+    @endif
+
     <div class="px-6 pb-6">
         <livewire:like-thread :thread="$thread"/>
     </div>