Tag normalization is now in the model, this is refelcted elsewhere in code usage

app/Http/Controllers/NotesController.php

@@ -155,17 +155,9 @@ class NotesController extends Controller
      */
     public function taggedNotes($tag)
     {
-        $tag = 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'
-        );
-
-        $tagId = Tag::where('tag', $tag)->pluck('id');
-        $notes = Tag::find($tagId)->notes()->orderBy('updated_at', 'desc')->get();
+        $notes = Note::whereHas('tags', function ($query) use ($tag) {
+            $query->where('tag', $tag);
+        })->get();
         foreach ($notes as $note) {
             $note->iso8601_time = $note->updated_at->toISO8601String();
             $note->human_time = $note->updated_at->diffForHumans();

app/Note.php

@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\Tag;
 use Normalizer;
 use Jonnybarnes\IndieWeb\Numbers;
 use Illuminate\Database\Eloquent\Model;
@@ -216,7 +217,7 @@ class Note extends Model implements HasMedia
             foreach ($matches[0] as $name) {
                 $name = str_replace('#', '', $name);
                 $replacements[$name] =
-                  '<a rel="tag" class="p-category" href="/notes/tagged/' . $name . '">#' . $name . '</a>';
+                  '<a rel="tag" class="p-category" href="/notes/tagged/' . Tag::normalizeTag($name) . '">#' . $name . '</a>';
             }
 
             // Replace #tags with valid microformat-enabled link

app/Tag.php

@@ -36,4 +36,32 @@ class Tag extends Model
      * @var array
      */
     protected $guarded = ['id'];
+
+    /**
+     * Normalize tags so they’re lowercase and fancy diatrics are removed.
+     *
+     * @param  string
+     */
+    public function setTagAttribute($value)
+    {
+        $this->attributes['tag'] = $this->normalizeTag($value);
+    }
+
+    /**
+     * This method actually normalizes a tag. That means lowercase-ing and
+     * removing fancy diatric characters.
+     *
+     * @param  string
+     */
+    public static function normalizeTag($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'
+        );
+    }
 }

changelog.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## Version {next}
+  - Better tag normalization code organisation
+
 ## Version 0.0.2 (2016-05-25)
   - Fix issue#1: tagged notes page needs the tag from the URL normalizing.