Added defaults and examples for preset-specific feed items

docs/snippets/preset-instagram.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Feeds;
+
+use App\Models\Product;
+use DragonCode\LaravelFeed\Feeds\Items\FeedItem;
+use DragonCode\LaravelFeed\Presets\InstagramFeedPreset;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+
+class InstagramFeed extends InstagramFeedPreset
+{
+    public function builder(): Builder
+    {
+        return Product::query();
+    }
+
+    public function item(Model $model): FeedItem
+    {
+        return parent::item($model)
+            ->title($model->title)
+            ->description($model->description)
+            ->brand($model->brand) // By default, null
+            ->url($model->url)
+            ->price(price: $model->price, salePrice: $model->price) // By default, salePrice = price
+            ->image($model->images[0])
+            ->images($model->images) // By default, null
+            ->availability($model->quantity > 0 ? 'in stock' : 'out of stock') // By default, 'in stock'
+            ->status($model->quantity > 0 ? 'active' : 'inactive') // By default, 'active'
+            ->condition('new')      // By default, 'new'
+            ->group(12345)          // By default, null
+            ->googleCategory(123)   // By default, null
+            ->facebookCategory(456) // By default, null
+            ->additional([
+                'g:foo' => 'Some foo',
+                'g:bar' => 'Some bar',
+
+                'g:baz' => [
+                    '@attributes' => ['qwe' => 'rty'],
+                    '@value'      => 'Some baz',
+                ],
+
+                '@g:arrayable' => [
+                    'a',
+                    'b',
+                    'c',
+                ],
+            ]);
+    }
+}

docs/snippets/receipt-instagram-feed.php

@@ -49,4 +49,9 @@ public function item(Model $model): FeedItem
                 ],
             ]);
     }
+
+    public function filename(): string
+    {
+        return 'instagram.xml';
+    }
 }

docs/topics/presets.topic

@@ -34,10 +34,52 @@
         Then implement the two required methods — <code>builder</code> and <code>item</code>. For example:
     </p>
 
-    <code-block lang="php" src="receipt-instagram-feed.php" include-lines="5-" />
+    <code-block lang="php" src="preset-instagram.php" include-lines="5-" />
 
     <p>
         Technically, preset classes are the same as the base
         <code>Feed</code> class, except they include the service-specific logic they target, including how information blocks and items are built.
     </p>
+
+    <chapter title="Defaults" id="defaults">
+        <chapter title="Instagram" id="instagram">
+            <code-block
+                    lang="php"
+                    src="../../src/Presets/Items/InstagramFeedItem.php"
+                    include-lines="13-"
+                    collapsible="true"
+                    default-state="collapsed"
+            />
+        </chapter>
+
+        <chapter title="Yandex" id="yandex">
+            <code-block
+                    lang="php"
+                    src="../../src/Presets/Items/YandexFeedItem.php"
+                    include-lines="13-"
+                    collapsible="true"
+                    default-state="collapsed"
+            />
+        </chapter>
+
+        <chapter title="Sitemap" id="sitemap">
+            <code-block
+                    lang="php"
+                    src="../../src/Presets/Items/SitemapFeedItem.php"
+                    include-lines="11-"
+                    collapsible="true"
+                    default-state="collapsed"
+            />
+        </chapter>
+
+        <chapter title="RSS" id="rss">
+            <code-block
+                    lang="php"
+                    src="../../src/Presets/Items/RssFeedItem.php"
+                    include-lines="14-"
+                    collapsible="true"
+                    default-state="collapsed"
+            />
+        </chapter>
+    </chapter>
 </topic>