feat: Add a pre-chat form on widget (#1769)

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

@@ -20,11 +20,7 @@ class Api::V1::Widget::BaseController < ApplicationController
   end
 
   def auth_token_params
-    @auth_token_params ||= ::Widget::TokenService.new(token: request.headers[header_name]).decode_token
-  end
-
-  def header_name
-    'X-Auth-Token'
+    @auth_token_params ||= ::Widget::TokenService.new(token: request.headers['X-Auth-Token']).decode_token
   end
 
   def set_web_widget
@@ -39,6 +35,50 @@ class Api::V1::Widget::BaseController < ApplicationController
     @contact = @contact_inbox.contact
   end
 
+  def create_conversation
+    ::Conversation.create!(conversation_params)
+  end
+
+  def inbox
+    @inbox ||= ::Inbox.find_by(id: auth_token_params[:inbox_id])
+  end
+
+  def conversation_params
+    # FIXME: typo referrer in additional attributes, will probably require a migration.
+    {
+      account_id: inbox.account_id,
+      inbox_id: inbox.id,
+      contact_id: @contact.id,
+      contact_inbox_id: @contact_inbox.id,
+      additional_attributes: {
+        browser: browser_params,
+        referer: permitted_params[:message][:referer_url],
+        initiated_at: timestamp_params
+      }
+    }
+  end
+
+  def update_contact(email)
+    contact_with_email = @current_account.contacts.find_by(email: email)
+    if contact_with_email
+      @contact = ::ContactMergeAction.new(
+        account: @current_account,
+        base_contact: contact_with_email,
+        mergee_contact: @contact
+      ).perform
+    else
+      @contact.update!(email: email, name: contact_name)
+    end
+  end
+
+  def contact_email
+    permitted_params[:contact][:email].downcase
+  end
+
+  def contact_name
+    params[:contact][:name] || contact_email.split('@')[0]
+  end
+
   def browser_params
     {
       browser_name: browser.name,
@@ -48,4 +88,19 @@ class Api::V1::Widget::BaseController < ApplicationController
       platform_version: browser.platform.version
     }
   end
+
+  def timestamp_params
+    { timestamp: permitted_params[:message][:timestamp] }
+  end
+
+  def message_params
+    {
+      account_id: conversation.account_id,
+      sender: @contact,
+      content: permitted_params[:message][:content],
+      inbox_id: conversation.inbox_id,
+      echo_id: permitted_params[:message][:echo_id],
+      message_type: :incoming
+    }
+  end
 end