user-mentions: skeleton to send push_notifications on mentions

app/models/chat_message.rb

@@ -3,6 +3,7 @@ class ChatMessage < ApplicationRecord
   include ChatServices::Spam
   include ChatServices::PrivateConversation
   include Deeplinkable
+  include Mentionable
   include Translatable
   include Reactionnable
   include Surveyable

app/models/concerns/mentionable.rb

@@ -0,0 +1,56 @@
+module Mentionable
+  extend ActiveSupport::Concern
+
+  included do
+    after_create :has_mentions!, if: :has_mentions?
+  end
+
+  MentionsStruct = Struct.new(:instance) do
+    def initialize(instance: nil)
+      @instance = instance
+    end
+
+    def no_html
+      document = Nokogiri::HTML(@instance.content)
+      document.css('img, a').each { |node| node.remove }
+      document.text.strip
+    end
+
+    def fragments
+      @fragments ||= Nokogiri::HTML.fragment(@instance.content)
+    end
+
+    def contains_html?
+      fragments.children.any?
+    end
+
+    def contains_anchor_with_href?
+      fragments.css('a[href]').any?
+    end
+
+    def contains_user_link?
+      fragments.css('a[href]').any? { |a| a['href'].include?('app/users') }
+    end
+
+    def extract_user_uuid
+      user_links = fragments.css('a[href]').select { |a| a['href'].include?('app/users') }
+
+      user_links.map do |a|
+        a['href'][%r{app/users/([^/]+)}, 1]
+      end
+    end
+  end
+
+  def mentions
+    @mentions ||= MentionsStruct.new(instance: self)
+  end
+
+  def has_mentions?
+    mentions.extract_user_uuid.any?
+  end
+
+  def has_mentions!
+    # @todo perform in a job
+    PushNotificationTrigger.new(self, :mention, Hash.new).run
+  end
+end

app/services/push_notification_trigger.rb

@@ -428,6 +428,33 @@ def comment_on_create
     end
   end
 
+  def chat_message_on_mention
+    return unless @record.respond_to?(:mentions)
+    return unless @record.mentions.respond_to?(:extract_user_uuid)
+
+    user_ids = User.where(uuid: @record.mentions.extract_user_uuid).pluck(:id).uniq
+
+    return unless user_ids.any?
+
+    puts "-- push to: #{user_ids}"
+
+    User.where(id: user_ids).find_in_batches(batch_size: 100) do |batches|
+      notify(
+        sender_id: @record.user_id,
+        referent: @record.messageable,
+        instance: @record.messageable,
+        users: batches,
+        params: {
+          object: I18nStruct.new(i18n: 'push_notifications.chat_message.mention', i18n_args: [username(@record.user)]),
+          content: I18nStruct.new(instance: @record, field: :content),
+          extra: {
+            tracking: :chat_message_on_mention
+          }
+        }
+      )
+    end
+  end
+
   def user_reaction_on_create
     return unless @record.respond_to?(:instance)
     return unless @record.instance.respond_to?(:user_id)

config/locales/entourage.fr.yml

@@ -367,6 +367,8 @@ fr:
       day_before:
         title: "🔔 Rappel : «%s» a lieu demain !"
         content: "N'oubliez pas, cet événement est pour demain. Est-ce que vous venez toujours ?"
+    chat_message:
+      mention: "%s vous a mentionné dans son message"
     post:
       create: "%s vient de partager : \"%s\""
     comment: