FEATURE: Merge discourse-automation (#26432)

Automation (previously known as discourse-automation) is now a core plugin.

plugins/automation/lib/discourse_automation/scripts/auto_responder.rb

@@ -0,0 +1,85 @@
+# frozen_string_literal: true
+
+DiscourseAutomation::Scriptable.add(DiscourseAutomation::Scripts::AUTO_RESPONDER) do
+  field :word_answer_list, component: :"key-value", accepts_placeholders: true
+  field :answering_user, component: :user
+  field :once, component: :boolean
+
+  version 1
+
+  triggerables %i[post_created_edited pm_created]
+
+  placeholder :sender_username
+  placeholder :word
+
+  script do |context, fields, automation|
+    key = DiscourseAutomation::AUTO_RESPONDER_TRIGGERED_IDS
+
+    answering_username = fields.dig("answering_user", "value") || Discourse.system_user.username
+    placeholders = { sender_username: answering_username }
+    post = context["post"]
+    next if !post.topic
+
+    next if fields.dig("once", "value") && post.topic.custom_fields[key]&.include?(automation.id)
+
+    answers = Set.new
+    word_answer_list_json = fields.dig("word_answer_list", "value")
+    next if word_answer_list_json.blank?
+
+    word_answer_list = JSON.parse(word_answer_list_json)
+    next if word_answer_list.blank?
+
+    word_answer_list.each do |word_answer_pair|
+      if word_answer_pair["key"].blank?
+        answers.add(word_answer_pair)
+        next
+      end
+
+      if post.is_first_post?
+        if match = post.topic.title.match(/\b(#{word_answer_pair["key"]})\b/i)
+          word_answer_pair["key"] = match.captures.first
+          answers.add(word_answer_pair)
+          next
+        end
+      end
+
+      if match = post.raw.match(/\b(#{word_answer_pair["key"]})\b/i)
+        word_answer_pair["key"] = match.captures.first
+        answers.add(word_answer_pair)
+      end
+    end
+
+    next if answers.blank?
+
+    answering_user = User.find_by(username: answering_username)
+    next if post.user == answering_user
+
+    replies =
+      post
+        .replies
+        .where(user_id: answering_user.id, deleted_at: nil)
+        .secured(Guardian.new(post.user))
+
+    next if replies.present?
+
+    answers =
+      answers
+        .to_a
+        .map do |answer|
+          utils.apply_placeholders(answer["value"], placeholders.merge(key: answer["key"]))
+        end
+        .join("\n\n")
+
+    value = (Array(post.topic.custom_fields[key]) << automation.id).compact.uniq
+    post.topic.custom_fields[key] = value
+    post.topic.save_custom_fields
+
+    PostCreator.create!(
+      answering_user,
+      topic_id: post.topic.id,
+      reply_to_post_number: post.post_number,
+      raw: answers,
+      skip_validations: true,
+    )
+  end
+end