Add helpscout webhook

app/controllers/webhook_controller.rb

@@ -0,0 +1,50 @@
+class WebhookController < ActionController::Base
+  before_action :verify_signature!, only: :helpscout
+
+  def helpscout
+    email = params[:customer][:email]
+    user = User.find_by(email: email)
+    gestionnaire = Gestionnaire.find_by(email: email)
+    administrateur = Administrateur.find_by(email: email)
+    html = []
+
+    if user
+      url = view_context.manager_user_url(user)
+      html << link_to_manager(user, url)
+    end
+
+    if gestionnaire
+      url = view_context.manager_gestionnaire_url(gestionnaire)
+      html << link_to_manager(gestionnaire, url)
+    end
+
+    if administrateur
+      url = view_context.manager_administrateur_url(administrateur)
+      html << link_to_manager(administrateur, url)
+    end
+
+    if html.empty?
+      head :not_found
+    else
+      render json: { html: html.join('<br>') }
+    end
+  end
+
+  private
+
+  def link_to_manager(model, url)
+    "<a target='_blank' href='#{url}'>#{model.model_name.human}##{model.id}</a>"
+  end
+
+  def verify_signature!
+    if generate_body_signature(request.body.read) != request.headers['X-Helpscout-Signature']
+      request_http_token_authentication
+    end
+  end
+
+  def generate_body_signature(body)
+    Base64.strict_encode64(OpenSSL::HMAC.digest('sha1',
+      Rails.application.secrets.helpscout[:webhook_secret],
+      body))
+  end
+end

config/routes.rb

@@ -120,8 +120,11 @@ Rails.application.routes.draw do
 
   get "patron" => "root#patron"
 
-  get "contact" => "support#index"
-  post "contact" => "support#create"
+  get "contact", to: "support#index"
+  post "contact", to: "support#create"
+
+  post "webhooks/helpscout", to: "webhook#helpscout"
+  match "webhooks/helpscout", to: lambda { |_| [204, {}, nil] }, via: :head
 
   #
   # Deprecated UI

config/secrets.yml

@@ -48,6 +48,7 @@ defaults: &defaults
     mailbox_id: <%= ENV['HELPSCOUT_MAILBOX_ID'] %>
     client_id: <%= ENV['HELPSCOUT_CLIENT_ID'] %>
     client_secret: <%= ENV['HELPSCOUT_CLIENT_SECRET'] %>
+    webhook_secret: <%= ENV['HELPSCOUT_WEBHOOK_SECRET'] %>
 
 development:
   <<: *defaults