Rework public API based on events

src/Core/Support/VisibleScope.php

@@ -1,40 +0,0 @@
-<?php namespace Flarum\Core\Support;
-
-use Flarum\Core\Users\User;
-use Illuminate\Database\Eloquent\Builder;
-
-/**
- * Add a query scope to an Eloquent model that filters out records that a user
- * is not allowed to view.
- */
-trait VisibleScope
-{
-    /**
-     * @var callable[]
-     */
-    protected static $visibleScopes = [];
-
-    /**
-     * Add a callback to scope a query to only include records that are visible
-     * to a user.
-     *
-     * @param callable $scope
-     */
-    public static function addVisibleScope(callable $scope)
-    {
-        static::$visibleScopes[] = $scope;
-    }
-
-    /**
-     * Scope a query to only include records that are visible to a user.
-     *
-     * @param Builder $query
-     * @param User $user
-     */
-    public function scopeWhereVisibleTo(Builder $query, User $user)
-    {
-        foreach (static::$visibleScopes as $scope) {
-            $scope($query, $user);
-        }
-    }
-}