refactor(sync): improve attribute mapping to support dynamic fields and custom transformations

app/models/qbo_base_model.rb

@@ -55,7 +55,7 @@ class QboBaseModel < ActiveRecord::Base
     end
   end
 
-  # Repsonds to missing methods by delegating to the QBO customer details object if the method is defined there.
+  # Repsonds to missing methods by delegating to the QBO entity calss if the method is defined there.
   # This allows for dynamic access to any attributes or methods of the QBO customer without having to explicitly define them in the Subclass model, providing flexibility and reducing boilerplate code.
   def respond_to_missing?(method_name, include_private = false)
     qbo_model_class.method_defined?(method_name) || super
@@ -73,12 +73,15 @@ class QboBaseModel < ActiveRecord::Base
     job.perform_later(id: id)
   end
 
+  # Flag used to update local without pushing to QBO.
+  # This is used to prevent loops with the webhook
   def skip_qbo_push?
     !!skip_qbo_push
   end
 
   private
   
+  # Log messages with a standarized prefix
   def log(msg)
     Rails.logger.info "[#{model_name.name}] #{msg}"
   end
@@ -90,6 +93,7 @@ class QboBaseModel < ActiveRecord::Base
     service_class.new(qbo: qbo, local: self).pull()
   end
 
+  # Pushs the entity's details from QuickBooks Online.
   def push_to_qbo
     log "Starting push for #{model_name.name} ##{id}..."
     qbo = QboConnectionService.current!
@@ -98,10 +102,12 @@ class QboBaseModel < ActiveRecord::Base
     return reslut
   end
 
+  # Dynamically get the Quickbooks Model Class
   def qbo_model_class
     @qbo_model_class ||= "Quickbooks::Model::#{model_name.name}".constantize
   end
 
+  # Dynamically get the Service Class
   def service_class
     @service_class ||= "#{model_name.name}Service".constantize
   end

app/services/customer_sync_service.rb

@@ -17,16 +17,13 @@ class CustomerSyncService < SyncServiceBase
     Customer
   end
 
-  # Determine if the remote entity should be deleted locally (e.g. if it's marked inactive in QBO)
-  def destroy_remote?(remote)
+  # Determine if the local entity should be deleted (e.g. if it's marked inactive in QBO)
+  def destroy_local?(remote)
     !remote.active?
   end
 
-  # Map relevant attributes from the QBO Customer to the local Customer model
-  def process_attributes(local, remote)
-    local.name = remote.display_name
-    local.phone_number = remote.primary_phone&.free_form_number&.gsub(/\D/, '')
-    local.mobile_phone_number = remote.mobile_phone&.free_form_number&.gsub(/\D/, '')
-  end
+  map_attribute :name, ->(remote) { remote.display_name }
+  map_attribute :phone_number, ->(remote) { remote.primary_phone&.free_form_number&.gsub(/\D/, '') }
+  map_attribute :mobile_phone_number, ->(remote) { remote.mobile_phone&.free_form_number&.gsub(/\D/, '') }
 
 end

app/services/employee_sync_service.rb

@@ -17,14 +17,11 @@ class EmployeeSyncService < SyncServiceBase
     Employee
   end
 
-  # Determine if the remote entity should be deleted locally (e.g. if it's marked inactive in QBO)
-  def destroy_remote?(remote)
+  # Determine if the local entity should be deleted (e.g. if it's marked inactive in QBO)
+  def destroy_local?(remote)
     !remote.active?
   end
 
-  # Map relevant attributes from the QBO Employee to the local Employee model
-  def process_attributes(local, remote)
-    local.name = remote.display_name
-  end
+  map_attribute :name, ->(remote) { remote.display_name }
 
 end

app/services/estimate_sync_service.rb

@@ -17,11 +17,6 @@ class EstimateSyncService < SyncServiceBase
     Estimate
   end
 
-  # Map relevant attributes from the QBO Estimate to the local Estimate model
-  def process_attributes(local, remote)
-    local.doc_number = remote.doc_number
-    local.txn_date = remote.txn_date
-    local.customer = Customer.find_by(id: remote.customer_ref&.value)
-  end
+  map_attribute :customer, ->(remote) { Customer.find_by(id: remote.customer_ref&.value) }
 
 end

app/services/invoice_sync_service.rb

@@ -17,19 +17,12 @@ class InvoiceSyncService < SyncServiceBase
     Invoice
   end
 
-  # Map relevant attributes from the QBO Invoice to the local Invoice model
-  def process_attributes(local, remote)
-    local.doc_number      = remote.doc_number
-    local.txn_date        = remote.txn_date
-    local.due_date        = remote.due_date
-    local.total_amount    = remote.total
-    local.balance         = remote.balance
-    local.qbo_updated_at  = remote.meta_data&.last_updated_time
-    local.customer = Customer.find_by(id: remote.customer_ref&.value)
-  end
-
   # Attach QBO Invoices to the local Issues
   def attach_documents(local, remote)
     InvoiceAttachmentService.new(local, remote).attach
   end
+
+  map_attribute :customer, ->(remote) { Customer.find_by(id: remote.customer_ref&.value) }
+  map_attribute :total_amount, ->(remote) { remote.total }
+  map_attribute :qbo_updated_at, ->(remote) { remote.meta_data&.last_updated_time }
 end

app/services/service_base.rb

@@ -14,10 +14,10 @@ class ServiceBase
   # The QBO client is used to communicate with QuickBooks Online, while the local record contains the data that needs to be pushed to QBO. 
   # If no local is provided, the service will not perform any operations.
   def initialize(qbo:, local: nil)
+    @entity = local.class.name
     raise "No QBO configuration found" unless qbo
     raise "#{@entity} record is required for push operation" unless local
     @qbo = qbo
-    @entity = local.class.name
     @local = local
   end
 
@@ -31,13 +31,7 @@ class ServiceBase
     return build_qbo_remote unless @local.present?
     return build_qbo_remote unless @local.id
     log "Fetching details for #{@entity} ##{@local.id} from QBO..."
-    qbo = QboConnectionService.current!
-    qbo.perform_authenticated_request do |access_token|
-      service_class = "Quickbooks::Service::#{@entity}".constantize
-      service = service_class.new(
-        company_id: qbo.realm_id,
-        access_token: access_token
-      )
+    with_qbo_service do |service|
       service.fetch_by_id(@local.id)
     end
   rescue => e
@@ -51,13 +45,7 @@ class ServiceBase
    # If the push is successful, it returns the remote record; otherwise, it logs the error and returns false.
   def push
     log "Pushing #{@entity} ##{@local.id} to QBO..."
-
-    remote = @qbo.perform_authenticated_request do |access_token|
-      service_class = "Quickbooks::Service::#{@entity}".constantize
-      service = service_class.new( 
-        company_id: @qbo.realm_id, 
-        access_token: access_token 
-      )
+    remote = with_qbo_service do |service|
       if @local.id.present?
         log "Updating #{@entity}"
         service.update(@local.details)
@@ -66,17 +54,29 @@ class ServiceBase
         service.create(@local.details)
       end
     end
-
     @local.id = remote.id unless @local.persisted?
     log "Push for remote ##{@local.id} completed."
-    return @local
+    @local
   end
 
   private 
 
+  # Performs authenticaed requests with QBO service
+  def with_qbo_service
+    @qbo.perform_authenticated_request do |access_token|
+      service = service_class.new( company_id: @qbo.realm_id, access_token: access_token )
+      yield service
+    end
+  end
+
   # Log messages with the entity type for better traceability
   def log(msg)
     Rails.logger.info "[#{@entity}Service] #{msg}"
   end
 
+  # Dynamically get the Quickbooks Service Class
+  def service_class
+    @service_class ||= "Quickbooks::Service::#{@entity}".constantize
+  end
+
 end

app/services/sync_service_base.rb

@@ -32,17 +32,11 @@ class SyncServiceBase
   # Sync all entities, or only those updated since the last sync
   def sync(full_sync: false)
     log "Starting #{full_sync ? 'full' : 'incremental'} #{@entity.name} sync with page size of: #{@page_size}"
-
-    @qbo.perform_authenticated_request do |access_token|
-      service_class = "Quickbooks::Service::#{@entity.name}".constantize
-      service = service_class.new(company_id: @qbo.realm_id, access_token: access_token)
-
+    with_qbo_service do |service|
       query = build_query(full_sync)  
-
       service.query_in_batches(query, per_page: @page_size) do |batch|
         entries = Array(batch)
         log "Processing batch of #{entries.size} #{@entity.name}"
-
         entries.each do |remote|
           persist(remote)
         end
@@ -55,10 +49,7 @@ class SyncServiceBase
   # Sync a single entity by its QBO ID (webhook usage)
   def sync_by_id(id)
     log "Syncing #{@entity.name} with ID #{id}"
-
-    @qbo.perform_authenticated_request do |access_token|
-      service_class = "Quickbooks::Service::#{@entity.name}".constantize
-      service = service_class.new(company_id: @qbo.realm_id, access_token: access_token)
+    with_qbo_service do |service|
       remote = service.fetch_by_id(id)
       persist(remote)
     end
@@ -66,6 +57,10 @@ class SyncServiceBase
 
   private
 
+  def attach_documents(local, remote)
+    # Override in subclasses if the entity has attachments (e.g. Invoice)
+  end
+
   # Builds a QBO query for retrieving entities
   def build_query(full_sync)
     if full_sync
@@ -81,13 +76,28 @@ class SyncServiceBase
     end
   end
 
-  def attach_documents(local, remote)
-    # Override in subclasses if the entity has attachments (e.g. Invoice)
+  # Determine if a remote entity should be deleted locally (e.g. if it's marked inactive in QBO)
+  def destroy_local?(remote)
+    false
   end
 
-  # Determine if a remote entity should be deleted locally (e.g. if it's marked inactive in QBO)
-  def destroy_remote?(remote)
-    false
+  def extract_value(remote, remote_attr)
+    case remote_attr
+    when Proc
+      remote_attr.call(remote)
+    else
+      remote.public_send(remote_attr)
+    end
+  end
+
+  class << self
+    def map_attribute(local, remote = nil, &block)
+      attribute_map[local] = block || remote
+    end
+
+    def attribute_map
+      @attribute_map ||= {}
+    end
   end
 
   # Log messages with the entity type for better traceability
@@ -99,7 +109,7 @@ class SyncServiceBase
   def persist(remote)
     local = @entity.find_or_initialize_by(id: remote.id)
 
-    if destroy_remote?(remote)
+    if destroy_local?(remote)
       if local.persisted?
         local.destroy
         log "Deleted #{@entity.name} #{remote.id}"
@@ -120,8 +130,25 @@ class SyncServiceBase
     log "Failed to sync #{@entity.name} #{remote.id}: #{e.message}"
   end
 
-  # This method should be implemented in subclasses to map remote attributes to local model
+  # Maps remote attributes to local model
   def process_attributes(local, remote)
-    raise NotImplementedError, "Subclasses must implement process_attributes"
+    log "Processing #{@entity} ##{remote.id}"
+    self.class.attribute_map.each do |local_attr, remote_attr|
+      value = extract_value(remote, remote_attr)
+      local.public_send("#{local_attr}=", value)
+    end
+  end
+
+  # Dynamically get the Quickbooks Service Class
+  def service_class
+    @service_class ||= "Quickbooks::Service::#{@entity}".constantize
+  end
+
+  # Performs authenticaed requests with QBO service
+  def with_qbo_service
+    @qbo.perform_authenticated_request do |access_token|
+      service = service_class.new( company_id: @qbo.realm_id, access_token: access_token )
+      yield service
+    end
   end
 end