Automatically create tweets for new posts

tools/ansible/vars/deploy_vars.yml

@@ -15,6 +15,8 @@ ansistrano_before_symlink_tasks_file: '{{ playbook_dir }}/deploy/before-symlink.
 
 app_hash_salt: '{{ vault_app_hash_salt }}'
 
+zapier_post_tweet_url: '{{ vault_zapier_post_tweet_url }}'
+
 release_drush_path: '{{ ansistrano_release_path.stdout }}/vendor/bin/drush'
 release_web_path: '{{ ansistrano_release_path.stdout }}/{{ project_web_dir }}'
 release_theme_path: '{{ release_web_path }}/themes/custom/opdavies'
@@ -52,3 +54,4 @@ drupal_settings:
             $settings['reverse_proxy_header'] = 'CF-Connecting-IP';
             $settings['omit_vary_cookie'] = TRUE;
 
+            $config['opdavies_talks.config']['zapier_post_tweet_url'] = '{{ zapier_post_tweet_url }}';

tools/ansible/vars/deploy_vault.yml

@@ -1,8 +1,12 @@
 $ANSIBLE_VAULT;1.1;AES256
-39323539326634383533336262633230666630366666363935643462306538366338666436663235
-6231616134366432633965376535303635396134333661640a393961633431383165653439343436
-39303333346162386436393133303633636565323730643732396431623464623631396138343434
-3166346130643937340a343433393831396638643434653933343033353430326633376333396462
-66363461363435373462643037353661346435383336336137613837633933393931613833313037
-33393064383939666335323733346164643036366232656362326461373031303365386266663133
-343633356331333831633730396562616634
+62643334643263653766663535353366623863386531373963316461633838393065303837353534
+3839316435356438653861303830373831343830373738620a306166646262343161616631656632
+63633838363735663165373133326438626465653064306562636232363662393363376539656632
+6535616630396334660a376664353566393862663239653963326531663332636364626139356639
+34623762666236303264623439363066383366623362323236313832653532376236366439366233
+37653234626463386435656438366436303533643531373032333333303964623636316361396437
+63383737633637633034396434323137303031346261656132356461303763326538363763643531
+34313130386636316332626536643461313532363833373261383131616461383639613934383463
+66626333633139323430636333636564383863363633663235373736383332613162623664643234
+35313831326539333762386635393232653133383538316466356434636635643130386435393139
+386561333039316230363637323935363135

web/modules/custom/custom/config/schema/custom.schema.yml

@@ -0,0 +1,6 @@
+opdavies_talks.settings:
+  type: config_object
+  label: 'Talks module configuration'
+  mapping:
+    zapier_post_tweet_url:
+      type: string

web/modules/custom/custom/custom.services.yml

@@ -3,5 +3,9 @@ services:
     tags:
       - { name: event_subscriber }
 
+  Drupal\custom\EventSubscriber\PushBlogPostToSocialMedia:
+    tags:
+      - { name: event_subscriber }
+
   Drupal\custom\Service\TalkCounter:
     autowire: true

web/modules/custom/custom/src/Entity/Node/Post.php

@@ -22,4 +22,12 @@ class Post extends Node implements ContentEntityBundleInterface {
     return (bool) $this->get('field_has_tweet')->getString();
   }
 
+  public function toTweet(): string {
+    // TODO: Add tags.
+
+    $parts = [$this->label(), $this->url('canonical', ['absolute' => TRUE])];
+
+    return implode(PHP_EOL . PHP_EOL, $parts);
+  }
+
 }

web/modules/custom/custom/src/EventSubscriber/PushBlogPostToSocialMedia.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\custom\EventSubscriber;
+
+use Drupal\custom\Entity\Node\Post;
+use Drupal\hook_event_dispatcher\Event\Entity\BaseEntityEvent;
+use Drupal\hook_event_dispatcher\HookEventDispatcherInterface;
+use Drupal\node\NodeInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+final class PushBlogPostToSocialMedia implements EventSubscriberInterface {
+
+  /**
+   * @inheritDoc
+   */
+  public static function getSubscribedEvents() {
+    return [
+      HookEventDispatcherInterface::ENTITY_PRE_SAVE => 'onEntityPreSave',
+    ];
+  }
+
+  public function onEntityPresave(BaseEntityEvent $event): void {
+    $entity = $event->getEntity();
+
+    if ($entity->getEntityTypeId() != 'node') {
+      return;
+    }
+
+    /** @var NodeInterface $entity */
+    if ($entity->bundle() != 'post') {
+      return;
+    }
+
+    if (!$entity->isPublished()) {
+      return;
+    }
+
+    // TODO: Check that the post has not already been pushed.
+
+    $url = \Drupal::configFactory()->get('opdavies_talks.config')
+      ->get('zapier_post_tweet_url');
+
+    \Drupal::httpClient()->post($url, [
+      'form_params' => [
+        'message' => $entity->toTweet(),
+      ],
+    ]);
+  }
+
+}