Episode 20 Complete

app/Activity.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Activity extends Model
+{
+    /**
+     * Attributes to guard against mass assignment.
+     *
+     * @var array
+     */
+    protected $guarded = [];
+}

app/Observers/ProjectObserver.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Observers;
+
+use App\Activity;
+use App\Project;
+
+class ProjectObserver
+{
+    /**
+     * Handle the project "created" event.
+     *
+     * @param  \App\Project $project
+     * @return void
+     */
+    public function created(Project $project)
+    {
+        $this->recordActivity('created', $project);
+    }
+
+    /**
+     * Handle the project "updated" event.
+     *
+     * @param  \App\Project $project
+     * @return void
+     */
+    public function updated(Project $project)
+    {
+        $this->recordActivity('updated', $project);
+    }
+
+    protected function recordActivity($type, $project)
+    {
+        Activity::create([
+            'project_id' => $project->id,
+            'description' => $type
+        ]);
+    }
+}

app/Project.php

@@ -53,4 +53,14 @@ public function addTask($body)
     {
         return $this->tasks()->create(compact('body'));
     }
+
+    /**
+     * The activity feed for the project.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function activity()
+    {
+        return $this->hasMany(Activity::class);
+    }
 }

app/Providers/AppServiceProvider.php

@@ -2,6 +2,8 @@
 
 namespace App\Providers;
 
+use App\Observers\ProjectObserver;
+use App\Project;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -13,7 +15,7 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        //
+        Project::observe(ProjectObserver::class);
     }
 
     /**

database/migrations/2019_01_24_143508_create_activities_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateActivitiesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('activities', function (Blueprint $table) {
+            $table->increments('id');
+            $table->unsignedInteger('project_id');
+            $table->string('description');
+            $table->timestamps();
+
+            $table->foreign('project_id')->references('id')->on('projects')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('activities');
+    }
+}

tests/Feature/ActivityFeedTest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Tests\Feature;
+
+use Facades\Tests\Setup\ProjectFactory;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class ActivityFeedTest extends TestCase
+{
+    use RefreshDatabase;
+
+    /** @test */
+    function creating_a_project_generates_activity()
+    {
+        $project = ProjectFactory::create();
+
+        $this->assertCount(1, $project->activity);
+        $this->assertEquals('created', $project->activity[0]->description);
+    }
+
+    /** @test */
+    function updating_a_project_generates_activity()
+    {
+        $project = ProjectFactory::create();
+
+        $project->update(['title' => 'Changed']);
+
+        $this->assertCount(2, $project->activity);
+        $this->assertEquals('updated', $project->activity->last()->description);
+
+    }
+}