Move models to their own subdirectory

app/Models/Tag.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Tag extends Model
+{
+    /**
+     * We shall set a blacklist of non-modifiable model attributes.
+     *
+     * @var array
+     */
+    protected $guarded = ['id'];
+
+    /**
+     * Define the relationship with tags.
+     *
+     * @var array
+     */
+    public function notes()
+    {
+        return $this->belongsToMany('App\Models\Note');
+    }
+
+    /**
+     * The bookmarks that belong to the tag.
+     */
+    public function bookmarks()
+    {
+        return $this->belongsToMany('App\Models\Bookmark');
+    }
+
+    /**
+     * Normalize tags so they’re lowercase and fancy diatrics are removed.
+     *
+     * @param  string
+     */
+    public function setTagAttribute($value)
+    {
+        $this->attributes['tag'] = $this->normalize($value);
+    }
+
+    /**
+     * This method actually normalizes a tag. That means lowercase-ing and
+     * removing fancy diatric characters.
+     *
+     * @param  string
+     */
+    public static function normalize($tag)
+    {
+        return mb_strtolower(
+            preg_replace(
+                '/&([a-z]{1,2})(acute|cedil|circ|grave|lig|orn|ring|slash|th|tilde|uml|caron);/i',
+                '$1',
+                htmlentities($tag)
+            ),
+            'UTF-8'
+        );
+    }
+}