Gab Social. All are welcome.

app/controllers/api/subscriptions_controller.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+class Api::SubscriptionsController < Api::BaseController
+  before_action :set_account
+  respond_to :txt
+
+  def show
+    if subscription.valid?(params['hub.topic'])
+      @account.update(subscription_expires_at: future_expires)
+      render plain: encoded_challenge, status: 200
+    else
+      head 404
+    end
+  end
+
+  def update
+    if subscription.verify(body, request.headers['HTTP_X_HUB_SIGNATURE'])
+      ProcessingWorker.perform_async(@account.id, body.force_encoding('UTF-8'))
+    end
+
+    head 200
+  end
+
+  private
+
+  def subscription
+    @_subscription ||= @account.subscription(
+      api_subscription_url(@account.id)
+    )
+  end
+
+  def body
+    @_body ||= request.body.read
+  end
+
+  def encoded_challenge
+    HTMLEntities.new.encode(params['hub.challenge'])
+  end
+
+  def future_expires
+    Time.now.utc + lease_seconds_or_default
+  end
+
+  def lease_seconds_or_default
+    (params['hub.lease_seconds'] || 1.day).to_i.seconds
+  end
+
+  def set_account
+    @account = Account.find(params[:id])
+  end
+end