Add a json_api_client DSL compiler

Gemfile

@@ -20,6 +20,7 @@ end
 
 group :development, :test do
   gem "smart_properties", require: false
+  gem "json_api_client", require: false
   gem "frozen_record", require: false
   gem "sprockets", require: false
   gem "rails", require: false

Gemfile.lock

@@ -155,6 +155,31 @@ GEM
       dry-schema (>= 1.12, < 2)
       zeitwerk (~> 2.6)
     erubi (1.12.0)
+    faraday (1.10.3)
+      faraday-em_http (~> 1.0)
+      faraday-em_synchrony (~> 1.0)
+      faraday-excon (~> 1.1)
+      faraday-httpclient (~> 1.0)
+      faraday-multipart (~> 1.0)
+      faraday-net_http (~> 1.0)
+      faraday-net_http_persistent (~> 1.0)
+      faraday-patron (~> 1.0)
+      faraday-rack (~> 1.0)
+      faraday-retry (~> 1.0)
+      ruby2_keywords (>= 0.0.4)
+    faraday-em_http (1.0.0)
+    faraday-em_synchrony (1.0.0)
+    faraday-excon (1.1.0)
+    faraday-httpclient (1.0.1)
+    faraday-multipart (1.0.4)
+      multipart-post (~> 2)
+    faraday-net_http (1.0.1)
+    faraday-net_http_persistent (1.2.0)
+    faraday-patron (1.0.0)
+    faraday-rack (1.0.0)
+    faraday-retry (1.0.3)
+    faraday_middleware (1.2.0)
+      faraday (~> 1.0)
     frozen_record (0.27.0)
       activemodel
     globalid (1.1.0)
@@ -173,6 +198,13 @@ GEM
     irb (1.6.4)
       reline (>= 0.3.0)
     json (2.6.3)
+    json_api_client (1.21.1)
+      activemodel (>= 3.2.0)
+      activesupport (>= 3.2.0)
+      addressable (~> 2.2)
+      faraday (>= 0.15.2, < 2.0)
+      faraday_middleware (>= 0.9.0, < 2.0)
+      rack (>= 0.2)
     kramdown (2.4.0)
       rexml
     kredis (1.5.0)
@@ -198,6 +230,7 @@ GEM
       builder
       minitest (>= 5.0)
       ruby-progressbar
+    multipart-post (2.3.0)
     net-imap (0.3.6)
       date
       net-protocol
@@ -298,6 +331,7 @@ GEM
     rubocop-sorbet (0.7.0)
       rubocop (>= 0.90.0)
     ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
     shopify-money (1.2.1)
     sidekiq (7.1.2)
       concurrent-ruby (< 2)
@@ -374,6 +408,7 @@ DEPENDENCIES
   google-protobuf
   graphql
   identity_cache
+  json_api_client
   kramdown (~> 2.4)
   kredis
   minitest

gemfiles/Gemfile-rails-6-1

@@ -19,6 +19,7 @@ end
 
 group(:development, :test) do
   gem("smart_properties", require: false)
+  gem("json_api_client", require: false)
   gem("frozen_record", require: false)
   gem("sprockets", require: false)
   gem("rails", "~> 6.1.0", require: false)

gemfiles/Gemfile-rails-main

@@ -19,6 +19,7 @@ end
 
 group(:development, :test) do
   gem("smart_properties", require: false)
+  gem("json_api_client", require: false)
   gem("frozen_record", require: false)
   gem("sprockets", require: false)
   gem("rails", github: "rails/rails", branch: "main", require: false)

lib/tapioca/dsl/compilers/json_api_client_resource.rb

@@ -0,0 +1,208 @@
+# typed: strict
+# frozen_string_literal: true
+
+begin
+  require "json_api_client"
+rescue LoadError
+  # means JsonApiClient is not installed,
+  # so let's not even define the compiler.
+  return
+end
+
+module Tapioca
+  module Dsl
+    module Compilers
+      # `Tapioca::Dsl::Compilers::JsonApiClientResource` generates RBI files for classes that inherit
+      # [`JsonApiClient::Resource`](https://github.com/JsonApiClient/json_api_client).
+      #
+      # For example, with the following classes that inherits `JsonApiClient::Resource`:
+      #
+      # ~~~rb
+      # # user.rb
+      # class User < JsonApiClient::Resource
+      #   has_many :posts
+      #
+      #   property :name, type: :string
+      #   property :is_admin, type: :boolean, default: false
+      # end
+      #
+      # # post.rb
+      # class Post < JsonApiClient::Resource
+      #   belongs_to :user
+      #
+      #   property :title, type: :string
+      # end
+      # ~~~
+      #
+      # this compiler will produce RBI files with the following content:
+      #
+      # ~~~rbi
+      # # user.rbi
+      # # typed: strong
+      #
+      # class User
+      #   include JsonApiClientResourceGeneratedMethods
+      #
+      #   module JsonApiClientResourceGeneratedMethods
+      #     sig { returns(T::Boolean) }
+      #     def is_admin; end
+      #
+      #     sig { params(is_admin: T::Boolean).returns(T::Boolean) }
+      #     def is_admin=(is_admin); end
+      #
+      #     sig { returns(T.nilable(::String)) }
+      #     def name; end
+      #
+      #     sig { params(name: T.nilable(::String)).returns(T.nilable(::String)) }
+      #     def name=(name); end
+      #
+      #     sig { returns(T.nilable(T::Array[Post])) }
+      #     def posts; end
+      #
+      #     sig { params(posts: T.nilable(T::Array[Post])).returns(T.nilable(T::Array[Post])) }
+      #     def posts=(posts); end
+      #   end
+      # end
+      #
+      # # post.rbi
+      # # typed: strong
+      #
+      # class Post
+      #   include JsonApiClientResourceGeneratedMethods
+      #
+      #   module JsonApiClientResourceGeneratedMethods
+      #     sig { returns(T.nilable(::String)) }
+      #     def title; end
+      #
+      #     sig { params(title: T.nilable(::String)).returns(T.nilable(::String)) }
+      #     def title=(title); end
+      #
+      #     sig { returns(T.nilable(::String)) }
+      #     def user_id; end
+      #
+      #     sig { params(user_id: T.nilable(::String)).returns(T.nilable(::String)) }
+      #     def user_id=(user_id); end
+      #   end
+      # end
+      # ~~~
+      class JsonApiClientResource < Compiler
+        extend T::Sig
+
+        ConstantType = type_member { { fixed: T.class_of(::JsonApiClient::Resource) } }
+
+        sig { override.void }
+        def decorate
+          schema = resource_schema
+          return if schema.nil? && constant.associations.empty?
+
+          root.create_path(constant) do |k|
+            module_name = "JsonApiClientResourceGeneratedMethods"
+            k.create_module(module_name) do |mod|
+              schema&.each_property do |property|
+                generate_methods_for_property(mod, property)
+              end
+
+              constant.associations.each do |association|
+                generate_methods_for_association(mod, association)
+              end
+            end
+
+            k.create_include(module_name)
+          end
+        end
+
+        class << self
+          extend T::Sig
+
+          sig { override.returns(T::Enumerable[Module]) }
+          def gather_constants
+            all_modules.select do |c|
+              name_of(c) && c < ::JsonApiClient::Resource
+            end
+          end
+        end
+
+        private
+
+        sig { returns(T.nilable(::JsonApiClient::Schema)) }
+        def resource_schema
+          schema = constant.schema
+
+          # empty? does not exist on JsonApiClient::Schema
+          schema if schema.size > 0 # rubocop:disable Style/ZeroLengthPredicate
+        end
+
+        sig do
+          params(
+            mod: RBI::Scope,
+            property: ::JsonApiClient::Schema::Property,
+          ).void
+        end
+        def generate_methods_for_property(mod, property)
+          type = type_for(property)
+
+          name = property.name.to_s
+
+          mod.create_method(name, return_type: type)
+          mod.create_method("#{name}=", parameters: [create_param(name, type: type)], return_type: type)
+        end
+
+        sig { params(property: ::JsonApiClient::Schema::Property).returns(String) }
+        def type_for(property)
+          type = ::JsonApiClient::Schema::TypeFactory.type_for(property.type)
+          return "T.untyped" if type.nil?
+
+          sorbet_type = if type.respond_to?(:sorbet_type)
+            type.sorbet_type
+          elsif type == ::JsonApiClient::Schema::Types::Integer
+            "::Integer"
+          elsif type == ::JsonApiClient::Schema::Types::String
+            "::String"
+          elsif type == ::JsonApiClient::Schema::Types::Float
+            "::Float"
+          elsif type == ::JsonApiClient::Schema::Types::Time
+            "::Time"
+          elsif type == ::JsonApiClient::Schema::Types::Decimal
+            "::BigDecimal"
+          elsif type == ::JsonApiClient::Schema::Types::Boolean
+            "T::Boolean"
+          else
+            "T.untyped"
+          end
+
+          if property.default.nil?
+            as_nilable_type(sorbet_type)
+          else
+            sorbet_type
+          end
+        end
+
+        sig do
+          params(
+            mod: RBI::Scope,
+            association: JsonApiClient::Associations::BaseAssociation,
+          ).void
+        end
+        def generate_methods_for_association(mod, association)
+          # If the association is broken, it will raise a NameError when trying to access the association_class
+          klass = association.association_class
+
+          name, type = case association
+          when ::JsonApiClient::Associations::BelongsTo::Association
+            # id must be a string: # https://jsonapi.org/format/#document-resource-object-identification
+            [association.param.to_s, "T.nilable(::String)"]
+          when ::JsonApiClient::Associations::HasOne::Association
+            [association.attr_name.to_s, "T.nilable(#{klass})"]
+          when ::JsonApiClient::Associations::HasMany::Association
+            [association.attr_name.to_s, "T.nilable(T::Array[#{klass}])"]
+          else
+            return # Unsupported association type
+          end
+
+          mod.create_method(name, return_type: type)
+          mod.create_method("#{name}=", parameters: [create_param(name, type: type)], return_type: type)
+        end
+      end
+    end
+  end
+end

manual/compiler_jsonapiclientresource.md

@@ -0,0 +1,75 @@
+## JsonApiClientResource
+
+`Tapioca::Dsl::Compilers::JsonApiClientResource` generates RBI files for classes that inherit
+[`JsonApiClient::Resource`](https://github.com/JsonApiClient/json_api_client).
+
+For example, with the following classes that inherits `JsonApiClient::Resource`:
+
+~~~rb
+# user.rb
+class User < JsonApiClient::Resource
+  has_many :posts
+
+  property :name, type: :string
+  property :is_admin, type: :boolean, default: false
+end
+
+# post.rb
+class Post < JsonApiClient::Resource
+  belongs_to :user
+
+  property :title, type: :string
+end
+~~~
+
+this compiler will produce RBI files with the following content:
+
+~~~rbi
+# user.rbi
+# typed: strong
+
+class User
+  include JsonApiClientResourceGeneratedMethods
+
+  module JsonApiClientResourceGeneratedMethods
+    sig { returns(T::Boolean) }
+    def is_admin; end
+
+    sig { params(is_admin: T::Boolean).returns(T::Boolean) }
+    def is_admin=(is_admin); end
+
+    sig { returns(T.nilable(::String)) }
+    def name; end
+
+    sig { params(name: T.nilable(::String)).returns(T.nilable(::String)) }
+    def name=(name); end
+
+    sig { returns(T.nilable(T::Array[Post])) }
+    def posts; end
+
+    sig { params(posts: T.nilable(T::Array[Post])).returns(T.nilable(T::Array[Post])) }
+    def posts=(posts); end
+  end
+end
+
+# post.rbi
+# typed: strong
+
+class Post
+  include JsonApiClientResourceGeneratedMethods
+
+  module JsonApiClientResourceGeneratedMethods
+    sig { returns(T.nilable(::String)) }
+    def title; end
+
+    sig { params(title: T.nilable(::String)).returns(T.nilable(::String)) }
+    def title=(title); end
+
+    sig { returns(T.nilable(::String)) }
+    def user_id; end
+
+    sig { params(user_id: T.nilable(::String)).returns(T.nilable(::String)) }
+    def user_id=(user_id); end
+  end
+end
+~~~

manual/compilers.md

@@ -27,6 +27,7 @@ In the following section you will find all available DSL compilers:
 * [GraphqlInputObject](compiler_graphqlinputobject.md)
 * [GraphqlMutation](compiler_graphqlmutation.md)
 * [IdentityCache](compiler_identitycache.md)
+* [JsonApiClientResource](compiler_jsonapiclientresource.md)
 * [Kredis](compiler_kredis.md)
 * [MixedInClassAttributes](compiler_mixedinclassattributes.md)
 * [Protobuf](compiler_protobuf.md)