[6.x] Add default sorting support for taxonomies

src/Stache/Stores/TaxonomiesStore.php

@@ -44,6 +44,8 @@ public function makeItemFromFile($path, $contents)
             ->title(Arr::get($data, 'title'))
             ->cascade(Arr::get($data, 'inject', []))
             ->searchIndex(Arr::get($data, 'search_index'))
+            ->sortField(Arr::get($data, 'sort_by'))
+            ->sortDirection(Arr::get($data, 'sort_dir'))
             ->defaultPublishState($this->getDefaultPublishState($data))
             ->sites($sites)
             ->previewTargets($this->normalizePreviewTargets(Arr::get($data, 'preview_targets', [])))

src/Taxonomies/Taxonomy.php

@@ -28,6 +28,7 @@
 use Statamic\Facades\Site;
 use Statamic\Facades\Stache;
 use Statamic\Facades\URL;
+use Statamic\Support\Arr;
 use Statamic\Support\Str;
 use Statamic\Support\Traits\FluentlyGetsAndSets;
 
@@ -44,6 +45,8 @@ class Taxonomy implements Arrayable, ArrayAccess, AugmentableContract, ContainsQ
     protected $collection;
     protected $defaultPublishState = true;
     protected $searchIndex;
+    protected $sortField;
+    protected $sortDirection;
     protected $previewTargets = [];
     protected $template;
     protected $termTemplate;
@@ -177,14 +180,32 @@ public function hasVisibleTermBlueprint()
         return $this->termBlueprints()->reject->hidden()->isNotEmpty();
     }
 
-    public function sortField()
+    public function sortField($field = null)
     {
-        return 'title'; // todo
+        return $this
+            ->fluentlyGetOrSet('sortField')
+            ->getter(function ($sortField) {
+                return $sortField ?? 'title';
+            })
+            ->args(func_get_args());
     }
 
-    public function sortDirection()
+    public function sortDirection($dir = null)
     {
-        return 'asc'; // todo
+        return $this
+            ->fluentlyGetOrSet('sortDirection')
+            ->getter(function ($sortDirection) {
+                if ($sortDirection) {
+                    return $sortDirection;
+                }
+
+                if ($this->sortField) {
+                    return 'asc';
+                }
+
+                return 'asc';
+            })
+            ->args(func_get_args());
     }
 
     public function queryTerms()
@@ -290,6 +311,11 @@ public function fileData()
             'layout' => $this->layout,
         ];
 
+        $data = Arr::removeNullValues(array_merge($data, [
+            'sort_by' => $this->sortField,
+            'sort_dir' => $this->sortDirection,
+        ]));
+
         if (Site::multiEnabled()) {
             $data['sites'] = $this->sites;
         }

tests/Data/Taxonomies/TaxonomyTest.php

@@ -182,6 +182,21 @@ public function it_gets_the_url_with_a_collection()
         $this->assertEquals('http://localhost/blog/tags', $taxonomy->absoluteUrl());
     }
 
+    #[Test]
+    public function it_gets_sort_field_and_direction()
+    {
+        $taxonomy = new Taxonomy;
+        $this->assertEquals('title', $taxonomy->sortField());
+        $this->assertEquals('asc', $taxonomy->sortDirection());
+
+        $taxonomy->sortField('foo');
+        $this->assertEquals('foo', $taxonomy->sortField());
+        $this->assertEquals('asc', $taxonomy->sortDirection());
+
+        $taxonomy->sortDirection('desc');
+        $this->assertEquals('desc', $taxonomy->sortDirection());
+    }
+
     #[Test]
     public function it_gets_evaluated_augmented_value_using_magic_property()
     {
@@ -308,6 +323,30 @@ public function it_get_terms_count_from_multi_sites()
         $this->assertEquals(3, $taxonomy->queryTerms()->pluck('slug')->unique()->count());
     }
 
+    #[Test]
+    public function it_has_file_data()
+    {
+        $taxonomy = (new Taxonomy)
+            ->handle('tags')
+            ->title('Tags');
+
+        $this->assertEquals([
+            'title' => 'Tags',
+            'inject' => [],
+        ], $taxonomy->fileData());
+
+        $taxonomy
+            ->sortField('foo')
+            ->sortDirection('desc');
+
+        $this->assertEquals([
+            'title' => 'Tags',
+            'sort_by' => 'foo',
+            'sort_dir' => 'desc',
+            'inject' => [],
+        ], $taxonomy->fileData());
+    }
+
     #[Test]
     public function it_saves_through_the_api()
     {

tests/Stache/Stores/TaxonomiesStoreTest.php

@@ -67,6 +67,21 @@ public function it_makes_taxonomy_instances_from_files()
         $this->assertEquals('Example', $item->title());
     }
 
+    #[Test]
+    public function it_hydrates_sort_field_and_direction()
+    {
+        $contents = <<<'YAML'
+title: Tags
+sort_by: foo
+sort_dir: desc
+YAML;
+
+        $item = $this->store->makeItemFromFile($this->tempDir.'/tags.yaml', $contents);
+
+        $this->assertEquals('foo', $item->sortField());
+        $this->assertEquals('desc', $item->sortDirection());
+    }
+
     #[Test]
     public function it_normalizes_preview_target_url_into_format()
     {