Record paddock state changes

app/Http/Controllers/PaddockController.php

@@ -4,6 +4,7 @@ namespace App\Http\Controllers;
 
 use Illuminate\Http\Request;
 use App\Paddock;
+use App\PaddockStateChange;
 use Redirect;
 
 class PaddockController extends Controller
@@ -85,11 +86,26 @@ class PaddockController extends Controller
             'name' => 'required',
         ]);
 
+        // Was there a state change?
+        $paddock = Paddock::find($id);
+        $state_changed = FALSE;
+        if ($paddock->isClosed && ($request->state === 'opened')) {
+            $state_changed = TRUE;
+        } else if (!$paddock->isClosed && ($request->state === 'closed')) {
+            $state_changed = TRUE;
+        }
+
+        // Record the state change, if needs be
+        if ($state_changed) {
+            $change = new PaddockStateChange(['state' => $request->state]);
+            $paddock->state_changes()->save($change);
+        }
+
         $update = [
             'name' => $request->name,
             'isClosed' => $request->state !== 'opened',
         ];
-        Paddock::where('id', $id)->update($update);
+        $paddock->update($update);
 
         return Redirect::to('paddocks')
             ->with('success', 'Enclos mis à jour.');

app/Http/Controllers/PaddockStateChangeController.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class PaddockStateChangeController extends Controller
+{
+    //
+}

app/Paddock.php

@@ -15,4 +15,12 @@ class Paddock extends Model
         'name',
         'isClosed',
     ];
+
+
+    /**
+     * Get the state changes for a paddock
+     */
+    public function state_changes() {
+        return $this->hasMany('App\PaddockStateChange');
+    }
 }

app/PaddockStateChange.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class PaddockStateChange extends Model
+{
+    protected $fillable = [
+        'state',
+    ];
+
+    public function paddock() {
+        return $this->belongsTo('App\Paddock');
+    }
+}

database/migrations/2020_04_17_083156_create_paddock_state_changes_table.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreatePaddockStateChangesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('paddock_state_changes', function (Blueprint $table) {
+            $table->id();
+            $table->integer('paddock_id')->unsigned();
+			$table->foreign('paddock_id')->references('id')->on('paddocks');
+            $table->string('state');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('paddock_state_changes');
+    }
+}