chore: Expose widget config via an API (#2645)

Expose widget config via an API so that the UI could be detached from the rails Application.

app/controllers/api/v1/widget/base_controller.rb

@@ -94,6 +94,10 @@ class Api::V1::Widget::BaseController < ApplicationController
     { timestamp: permitted_params[:message][:timestamp] }
   end
 
+  def permitted_params
+    params.permit(:website_token)
+  end
+
   def message_params
     {
       account_id: conversation.account_id,

app/controllers/api/v1/widget/campaigns_controller.rb

@@ -4,10 +4,4 @@ class Api::V1::Widget::CampaignsController < Api::V1::Widget::BaseController
   def index
     @campaigns = @web_widget.inbox.campaigns.where(enabled: true)
   end
-
-  private
-
-  def permitted_params
-    params.permit(:website_token)
-  end
 end

app/controllers/api/v1/widget/configs_controller.rb

@@ -0,0 +1,41 @@
+class Api::V1::Widget::ConfigsController < Api::V1::Widget::BaseController
+  before_action :set_global_config
+
+  def create
+    build_contact
+    set_token
+  end
+
+  private
+
+  def set_global_config
+    @global_config = GlobalConfig.get('LOGO_THUMBNAIL', 'BRAND_NAME', 'WIDGET_BRAND_URL')
+  end
+
+  def set_contact
+    @contact_inbox = @web_widget.inbox.contact_inboxes.find_by(
+      source_id: auth_token_params[:source_id]
+    )
+    @contact = @contact_inbox&.contact
+  end
+
+  def build_contact
+    return if @contact.present?
+
+    @contact_inbox = @web_widget.create_contact_inbox(additional_attributes)
+    @contact = @contact_inbox.contact
+  end
+
+  def set_token
+    payload = { source_id: @contact_inbox.source_id, inbox_id: @web_widget.inbox.id }
+    @token = ::Widget::TokenService.new(payload: payload).generate_token
+  end
+
+  def additional_attributes
+    if @web_widget.inbox.account.feature_enabled?('ip_lookup')
+      { created_at_ip: request.remote_ip }
+    else
+      {}
+    end
+  end
+end

app/controllers/api/v1/widget/inbox_members_controller.rb

@@ -4,10 +4,4 @@ class Api::V1::Widget::InboxMembersController < Api::V1::Widget::BaseController
   def index
     @inbox_members = @web_widget.inbox.inbox_members.includes(:user)
   end
-
-  private
-
-  def permitted_params
-    params.permit(:website_token)
-  end
 end