From 84a381583586caa68e620ab88d79bc3ccd484bc3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Geonizeli?= <joao.geonizeli@gmail.com>
Date: Thu, 21 Jul 2022 14:26:03 -0300
Subject: [PATCH] add questions query

---
 app/controllers/graphql_controller.rb         |  3 +-
 .../enums/question_bloom_taxonomy_enum.rb     |  9 ++++++
 app/graphql/enums/question_check_type_enum.rb |  9 ++++++
 app/graphql/enums/question_difficulty_enum.rb |  9 ++++++
 app/graphql/enums/question_status_enum.rb     |  9 ++++++
 app/graphql/inputs/date_range_input.rb        |  8 +++++
 app/graphql/inputs/question_where_input.rb    | 15 +++++++++
 app/graphql/progress_test_schema.rb           | 11 ++++---
 .../resolvers/questions_query_resolver.rb     | 32 +++++++++++++++++++
 app/graphql/types/base_enum.rb                |  5 +++
 app/graphql/types/query_type.rb               | 12 +++----
 .../types/question_alternative_type.rb        | 12 +++++++
 app/graphql/types/question_type.rb            | 28 ++++++++++++++++
 app/policies/application_policy.rb            |  5 +++
 app/policies/question_policy.rb               | 24 ++++++++++++++
 15 files changed, 177 insertions(+), 14 deletions(-)
 create mode 100644 app/graphql/enums/question_bloom_taxonomy_enum.rb
 create mode 100644 app/graphql/enums/question_check_type_enum.rb
 create mode 100644 app/graphql/enums/question_difficulty_enum.rb
 create mode 100644 app/graphql/enums/question_status_enum.rb
 create mode 100644 app/graphql/inputs/date_range_input.rb
 create mode 100644 app/graphql/inputs/question_where_input.rb
 create mode 100644 app/graphql/resolvers/questions_query_resolver.rb
 create mode 100644 app/graphql/types/question_alternative_type.rb
 create mode 100644 app/graphql/types/question_type.rb
 create mode 100644 app/policies/question_policy.rb

diff --git a/app/controllers/graphql_controller.rb b/app/controllers/graphql_controller.rb
index 016713e..67599d2 100644
--- a/app/controllers/graphql_controller.rb
+++ b/app/controllers/graphql_controller.rb
@@ -9,8 +9,7 @@ class GraphqlController < ApplicationController
     query = params[:query]
     operation_name = params[:operationName]
     context = {
-      # Query context goes here, for example:
-      # current_user: current_user,
+      current_user: current_user,
     }
     result = ProgressTestSchema.execute(query, variables: variables, context: context, operation_name: operation_name)
     render json: result
diff --git a/app/graphql/enums/question_bloom_taxonomy_enum.rb b/app/graphql/enums/question_bloom_taxonomy_enum.rb
new file mode 100644
index 0000000..e1ae7c6
--- /dev/null
+++ b/app/graphql/enums/question_bloom_taxonomy_enum.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Enums
+  class QuestionBloomTaxonomyEnum < Types::BaseEnum
+    graphql_name "QuestionBloomTaxonomy"
+
+    values_from_enumerize(Question.bloom_taxonomy)
+  end
+end
diff --git a/app/graphql/enums/question_check_type_enum.rb b/app/graphql/enums/question_check_type_enum.rb
new file mode 100644
index 0000000..5b1daee
--- /dev/null
+++ b/app/graphql/enums/question_check_type_enum.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Enums
+  class QuestionCheckTypeEnum < Types::BaseEnum
+    graphql_name "QuestionCheckType"
+
+    values_from_enumerize(Question.check_type)
+  end
+end
diff --git a/app/graphql/enums/question_difficulty_enum.rb b/app/graphql/enums/question_difficulty_enum.rb
new file mode 100644
index 0000000..96e9ff9
--- /dev/null
+++ b/app/graphql/enums/question_difficulty_enum.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Enums
+  class QuestionDifficultyEnum < Types::BaseEnum
+    graphql_name "QuestionDifficulty"
+
+    values_from_enumerize(Question.difficulty)
+  end
+end
diff --git a/app/graphql/enums/question_status_enum.rb b/app/graphql/enums/question_status_enum.rb
new file mode 100644
index 0000000..3adb985
--- /dev/null
+++ b/app/graphql/enums/question_status_enum.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Enums
+  class QuestionStatusEnum < Types::BaseEnum
+    graphql_name "QuestionStatus"
+
+    values_from_enumerize(Question.status)
+  end
+end
diff --git a/app/graphql/inputs/date_range_input.rb b/app/graphql/inputs/date_range_input.rb
new file mode 100644
index 0000000..60d7369
--- /dev/null
+++ b/app/graphql/inputs/date_range_input.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+module Inputs
+  class DateRangeInput < Types::BaseInputObject
+    argument :start_at, GraphQL::Types::ISO8601Date, required: true
+    argument :end_at, GraphQL::Types::ISO8601Date, required: true
+  end
+end
diff --git a/app/graphql/inputs/question_where_input.rb b/app/graphql/inputs/question_where_input.rb
new file mode 100644
index 0000000..99961d5
--- /dev/null
+++ b/app/graphql/inputs/question_where_input.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module Inputs
+  class QuestionWhereInput < Types::BaseInputObject
+    argument :check_type, [Enums::QuestionCheckTypeEnum], required: false
+    argument :status, [Enums::QuestionStatusEnum], required: false
+    argument :difficulty, [Enums::QuestionDifficultyEnum], required: false
+    argument :bloom_taxonomy, [Enums::QuestionBloomTaxonomyEnum], required: false
+    argument :authorship_year, [String], required: false
+    argument :subject_id, ID, required: false
+    argument :user_id, ID, required: false
+    argument :create_date, DateRangeInput, required: false
+    argument :unifeso_authorship, Boolean, required: false
+  end
+end
diff --git a/app/graphql/progress_test_schema.rb b/app/graphql/progress_test_schema.rb
index 0179a68..e4caa11 100644
--- a/app/graphql/progress_test_schema.rb
+++ b/app/graphql/progress_test_schema.rb
@@ -16,22 +16,23 @@ class ProgressTestSchema < GraphQL::Schema
 
   # Union and Interface Resolution
   def self.resolve_type(abstract_type, obj, ctx)
-    # TODO: Implement this method
-    # to return the correct GraphQL object type for `obj`
-    raise(GraphQL::RequiredImplementationMissingError)
+    case obj
+    when Question
+      Types::QuestionType
+    else
+      raise("Unexpected object: #{obj}")
+    end
   end
 
   # Relay-style Object Identification:
 
   # Return a string UUID for `object`
   def self.id_from_object(object, type_definition, query_ctx)
-    # For example, use Rails' GlobalID library (https://github.com/rails/globalid):
     object.to_gid_param
   end
 
   # Given a string UUID, find the object
   def self.object_from_id(global_id, query_ctx)
-    # For example, use Rails' GlobalID library (https://github.com/rails/globalid):
     GlobalID.find(global_id)
   end
 end
diff --git a/app/graphql/resolvers/questions_query_resolver.rb b/app/graphql/resolvers/questions_query_resolver.rb
new file mode 100644
index 0000000..f495785
--- /dev/null
+++ b/app/graphql/resolvers/questions_query_resolver.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+module Resolvers
+  class QuestionsQueryResolver
+    def initialize(initial_scope, context:, where:)
+      @initial_scope = initial_scope
+      @context = context
+      @where = where.to_h
+    end
+
+    def resolve
+      set_created_at_filter
+
+      unifeso_authorship = @where.delete(:unifeso_authorship)
+
+      scope = QuestionPolicy::Scope.new(@context[:current_user], @initial_scope).resolve
+        .where(@where)
+        .order(updated_at: :desc)
+
+      return scope if unifeso_authorship.nil?
+
+      unifeso_authorship ? scope.where(authorship: "UNIFESO") : scope.where.not(authorship: "UNIFESO")
+    end
+
+    private
+
+    def set_created_at_filter
+      create_date_range = @where.delete(:create_date)
+
+      @where[:created_at] = create_date_range[:start_at]..create_date_range[:end_at] if create_date_range
+    end
+  end
+end
diff --git a/app/graphql/types/base_enum.rb b/app/graphql/types/base_enum.rb
index b45a845..71b3973 100644
--- a/app/graphql/types/base_enum.rb
+++ b/app/graphql/types/base_enum.rb
@@ -1,4 +1,9 @@
 module Types
   class BaseEnum < GraphQL::Schema::Enum
+    def self.values_from_enumerize(enum_values)
+      enum_values.values.each do |enum_value|
+        value enum_value.upcase, value: enum_value
+      end
+    end
   end
 end
diff --git a/app/graphql/types/query_type.rb b/app/graphql/types/query_type.rb
index e884f8b..7600500 100644
--- a/app/graphql/types/query_type.rb
+++ b/app/graphql/types/query_type.rb
@@ -4,14 +4,12 @@ module Types
     include GraphQL::Types::Relay::HasNodeField
     include GraphQL::Types::Relay::HasNodesField
 
-    # Add root-level fields here.
-    # They will be entry points for queries on your schema.
+    field :questions, QuestionType.connection_type, null: false do
+      argument :where, Inputs::QuestionWhereInput, required: false
+    end
 
-    # TODO: remove me
-    field :test_field, String, null: false,
-      description: "An example field added by the generator"
-    def test_field
-      "Hello World!"
+    def questions(where: nil)
+      Resolvers::QuestionsQueryResolver.new(Question, context: context, where: where).resolve
     end
   end
 end
diff --git a/app/graphql/types/question_alternative_type.rb b/app/graphql/types/question_alternative_type.rb
new file mode 100644
index 0000000..df5d86a
--- /dev/null
+++ b/app/graphql/types/question_alternative_type.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Types
+  module Questions
+    class Alternative < Types::BaseObject
+      graphql_name "QuestionAlternative"
+
+      field :correct, Boolean, null: false
+      field :text, String, null: true
+    end
+  end
+end
diff --git a/app/graphql/types/question_type.rb b/app/graphql/types/question_type.rb
new file mode 100644
index 0000000..37cf4f2
--- /dev/null
+++ b/app/graphql/types/question_type.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Types
+  class QuestionType < Types::BaseObject
+    implements GraphQL::Types::Relay::Node
+
+    graphql_name 'Question'
+
+    global_id_field :id
+    field :user_id, Integer, null: false
+    field :subject_id, Integer
+    field :alternatives, GraphQL::Types::JSON, null: false
+    field :authorship, String
+    field :authorship_year, String
+    field :body, String
+    field :explanation, String
+    field :instruction, String
+    field :intention, String
+    field :references, String
+    field :support, String
+    field :bloom_taxonomy, Enums::QuestionBloomTaxonomyEnum
+    field :check_type, Enums::QuestionCheckTypeEnum
+    field :difficulty, Enums::QuestionDifficultyEnum
+    field :status, Enums::QuestionStatusEnum, null: false
+    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+  end
+end
diff --git a/app/policies/application_policy.rb b/app/policies/application_policy.rb
index e000cba..eee630d 100644
--- a/app/policies/application_policy.rb
+++ b/app/policies/application_policy.rb
@@ -6,6 +6,11 @@ class ApplicationPolicy
   def initialize(user, record)
     @user = user
     @record = record
+    @roles = user.roles.map { |r| r.name.to_sym }
+  end
+
+  def is?(role)
+    @roles.any?(role)
   end
 
   def index?
diff --git a/app/policies/question_policy.rb b/app/policies/question_policy.rb
new file mode 100644
index 0000000..7a42e7d
--- /dev/null
+++ b/app/policies/question_policy.rb
@@ -0,0 +1,24 @@
+class QuestionPolicy < ApplicationPolicy
+  class Scope < Scope
+    def resolve
+      scope.all
+    end
+  end
+
+
+  def create?
+    user.roles.present?
+  end
+
+  def update?
+    is?(:admin) || is?(:nde) || (is?(:teacher) && record.user_id == user.id)
+  end
+
+  def destroy?
+    record.user_id == user.id && record.status != "registered"
+  end
+
+  def finish?
+    (is?(:admin) || record.user_id == user.id) && record.status.to_sym == :approved
+  end
+end