add option to preload custom fields metadata

lib/zendesk_api/client.rb

@@ -32,6 +32,8 @@ class Client
     attr_reader :config
     # @return [Array] Custom response callbacks
     attr_reader :callbacks
+    # @return [Hash] Memoized account data
+    attr_reader :account_data
 
     # Handles resources such as 'tickets'. Any options are passed to the underlying collection, except reload which disregards
     # memoization and creates a new Collection instance.
@@ -95,6 +97,7 @@ def initialize
 
       @callbacks = []
       @resource_cache = {}
+      @account_data = {}
 
       check_url
       check_instrumentation
@@ -105,6 +108,7 @@ def initialize
       set_token_auth
       set_default_logger
       add_warning_callback
+      preload_custom_fields_metadata
     end
 
     # token impersonation for the scope of the block
@@ -266,6 +270,13 @@ def add_warning_callback
       end
     end
 
+    def preload_custom_fields_metadata
+      return unless @config.preload_custom_fields_metadata
+
+      @account_data["custom_fields"] ||= {}
+      ticket_fields.each { |field| @account_data["custom_fields"][field.title] = field.id }
+    end
+
     # See https://lostisland.github.io/faraday/middleware/authentication
     def set_authentication(builder, config)
       if config.access_token && !config.url_based_access_token

lib/zendesk_api/configuration.rb

@@ -57,6 +57,9 @@ class Configuration
     # specify if you want instrumentation to be used
     attr_accessor :instrumentation
 
+    # set to true if you want to preload custom fields metadata
+    attr_accessor :preload_custom_fields_metadata
+
     def initialize
       @client_options = {}
       @use_resource_cache = true

lib/zendesk_api/resource.rb

@@ -76,6 +76,10 @@ def initialize(client, attributes = {})
       @attributes.clear_changes unless new_record?
     end
 
+    def account_data
+      @client.account_data
+    end
+
     # Passes the method onto the attributes hash.
     # If the attributes are nested (e.g. { :tickets => { :id => 1 } }), passes the method onto the nested hash.
     def method_missing(*args, &)

lib/zendesk_api/resources.rb

@@ -546,6 +546,20 @@ def to_param
 
     has_many :incidents, class: Ticket
 
+    def custom_field_by_name(name)
+      raise "Custom fields metadata missing. Enable config.preload_custom_fields_metadata" unless account_data["custom_fields"]
+
+      custom_field_id = account_data["custom_fields"][name]
+      custom_fields.find { |cf| cf["id"] == custom_field_id }["value"]
+    end
+
+    def set_custom_field_by_name(name, value)
+      raise "Custom fields metadata missing. Enable config.preload_custom_fields_metadata" unless account_data["custom_fields"]
+
+      custom_field_id = account_data["custom_fields"][name]
+      custom_fields.find { |cf| cf["id"] == custom_field_id }["value"] = value
+    end
+
     # Gets a incremental export of tickets from the start_time until now.
     # @param [Client] client The {Client} object to be used
     # @param [Integer] start_time The start_time parameter