Added Shortcode method (#35) (#36)

* Added Shortcode method
- Added shortcode method to allow for shortcodes in editors to show the newsletter form

Co-authored-by: SnowB1 <[email protected]>

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: SnowB1 <[email protected]>

_config.php

@@ -5,7 +5,10 @@
 use Page;
 use PageController;
 use SilverStripe\SiteConfig\SiteConfig;
+use SilverStripe\View\Parsers\ShortcodeParser;
 
 SiteConfig::add_extension(NewsletterSettings::class);
 Page::add_extension(NewsletterPageExtender::class);
 PageController::add_extension(NewsletterPageControllerExtender::class);
+
+ShortcodeParser::get('default')->register('newsletterform', [NewsletterShortcodeProvider::class, 'handle_shortcode']);

src/NewsletterPageExtender.php

@@ -22,6 +22,10 @@ class NewsletterPageExtender extends DataExtension
     "NewsletterShowHide" => true,
   ];
 
+  private static $casting = [
+    'NewsletterShortcode' => 'HTMLText'
+  ];
+
   public function populateDefaults()
   {
     $this->owner->NewsletterShowHide = true;

src/NewsletterShortcodeProvider.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Werkbot\Newsletter;
+
+use SilverStripe\Control\Controller;
+use SilverStripe\View\Parsers\ShortcodeParser;
+
+class NewsletterShortcodeProvider extends ShortcodeParser{
+  /*
+    [newsletter,class="form newsletter-form"]
+  */
+  public static function handle_shortcode($args, $content, $parser, $shortcode, $extra = array()){
+    $PopupContent = '';
+    // Add Content before form
+    if ($content){
+      $PopupContent = $parser->parse($content);
+    }
+    // If class add wrapper div
+    if (isset($arguments['class'])){
+      $PopupContent .= '<div class="'.$arguments['class'].'">';
+    }
+    // Get Form HTML
+    $PopupContent .= Controller::curr()->NewsletterForm()
+      ->setHTMLID("NewsletterForm".rand(0,100))
+      ->setFormAction(Controller::join_links(Controller::curr()->owner->Link(), 'NewsletterForm'))
+      ->forTemplate();
+    // End wrapper div
+    if (isset($arguments['class'])){
+      $PopupContent .= '</div>';
+    }
+    // Return full html
+    return $PopupContent;
+  }
+}