Updated activities table format

Renamed some columns to be more generic and applicable.
Removed now redundant book_id column.
Allowed nullable entity morph columns for non-entity activity.

Ran tests and made required changes.

app/Actions/Activity.php

@@ -5,16 +5,16 @@ namespace BookStack\Actions;
 use BookStack\Auth\User;
 use BookStack\Entities\Entity;
 use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
- * @property string $key
+ * @property string $type
  * @property User $user
  * @property Entity $entity
- * @property string $extra
+ * @property string $detail
  * @property string $entity_type
  * @property int $entity_id
  * @property int $user_id
- * @property int $book_id
  */
 class Activity extends Model
 {
@@ -32,20 +32,18 @@ class Activity extends Model
 
     /**
      * Get the user this activity relates to.
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
-    public function user()
+    public function user(): BelongsTo
     {
         return $this->belongsTo(User::class);
     }
 
     /**
-     * Returns text from the language files, Looks up by using the
-     * activity key.
+     * Returns text from the language files, Looks up by using the activity key.
      */
-    public function getText()
+    public function getText(): string
     {
-        return trans('activities.' . $this->key);
+        return trans('activities.' . $this->type);
     }
 
     /**
@@ -53,6 +51,6 @@ class Activity extends Model
      */
     public function isSimilarTo(Activity $activityB): bool
     {
-        return [$this->key, $this->entity_type, $this->entity_id] === [$activityB->key, $activityB->entity_type, $activityB->entity_id];
+        return [$this->type, $this->entity_type, $this->entity_id] === [$activityB->type, $activityB->entity_type, $activityB->entity_id];
     }
 }

app/Actions/ActivityService.php

@@ -12,14 +12,12 @@ use Illuminate\Support\Facades\Log;
 class ActivityService
 {
     protected $activity;
-    protected $user;
     protected $permissionService;
 
     public function __construct(Activity $activity, PermissionService $permissionService)
     {
         $this->activity = $activity;
         $this->permissionService = $permissionService;
-        $this->user = user();
     }
 
     /**
@@ -38,8 +36,8 @@ class ActivityService
     protected function newActivityForUser(string $type): Activity
     {
         return $this->activity->newInstance()->forceFill([
-            'key'     => strtolower($type),
-            'user_id' => $this->user->id,
+            'type'     => strtolower($type),
+            'user_id' => user()->id,
         ]);
     }
 
@@ -51,9 +49,9 @@ class ActivityService
     public function removeEntity(Entity $entity)
     {
         $entity->activity()->update([
-            'extra'       => $entity->name,
-            'entity_id'   => 0,
-            'entity_type' => '',
+            'detail'       => $entity->name,
+            'entity_id'   => null,
+            'entity_type' => null,
         ]);
     }
 
@@ -150,9 +148,9 @@ class ActivityService
     /**
      * Flashes a notification message to the session if an appropriate message is available.
      */
-    protected function setNotification(string $activityKey)
+    protected function setNotification(string $type)
     {
-        $notificationTextKey = 'activities.' . $activityKey . '_notification';
+        $notificationTextKey = 'activities.' . $type . '_notification';
         if (trans()->has($notificationTextKey)) {
             $message = trans($notificationTextKey);
             session()->flash('success', $message);