Feature: Contact Merge Action (#378)

app/actions/contact_merge_action.rb

@@ -0,0 +1,36 @@
+class ContactMergeAction
+  pattr_initialize [:account!, :base_contact!, :mergee_contact!]
+
+  def perform
+    ActiveRecord::Base.transaction do
+      validate_contacts
+      merge_conversations
+      merge_contact_inboxes
+      remove_mergee_contact
+    end
+  end
+
+  private
+
+  def validate_contacts
+    return if belongs_to_account?(@base_contact) && belongs_to_account?(@mergee_contact)
+
+    raise Exception, 'contact does not belong to the account'
+  end
+
+  def belongs_to_account?(contact)
+    @account.id == contact.account_id
+  end
+
+  def merge_conversations
+    Conversation.where(contact_id: @mergee_contact.id).update(contact_id: @base_contact.id)
+  end
+
+  def merge_contact_inboxes
+    ContactInbox.where(contact_id: @mergee_contact.id).update(contact_id: @base_contact.id)
+  end
+
+  def remove_mergee_contact
+    @mergee_contact.destroy!
+  end
+end

app/controllers/api/v1/actions/contact_merges_controller.rb

@@ -0,0 +1,28 @@
+class Api::V1::Actions::ContactMergesController < Api::BaseController
+  before_action :set_base_contact, only: [:create]
+  before_action :set_mergee_contact, only: [:create]
+
+  def create
+    contact_merge_action = ContactMergeAction.new(
+      account: current_account,
+      base_contact: @base_contact,
+      mergee_contact: @mergee_contact
+    )
+    contact_merge_action.perform
+    render json: @base_contact
+  end
+
+  private
+
+  def set_base_contact
+    @base_contact = contacts.find(params[:base_contact_id])
+  end
+
+  def set_mergee_contact
+    @mergee_contact = contacts.find(params[:mergee_contact_id])
+  end
+
+  def contacts
+    @contacts ||= current_account.contacts
+  end
+end