Adds SurveyGenerator service.

This is an abstraction around survey generation and isn't called from anywhere at the moment. It still needs to be determined at what point surveys will be generated (e.g. right after a survey is completed; via cron job; etc).
Also the algorithm is just taking the simple approach of picking two questions from each category. We are thinking of refining this in the future so that questions are selected based on previous survey responses.

Author: achinn

Gemfile

@@ -42,7 +42,7 @@ gem "image_processing", "~> 1.2"
 
 gem "frozen_record"
 
-gem 'formtastic'
+gem "formtastic"
 
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem

app/models/answer.rb

@@ -1,3 +1,7 @@
 class Answer < ApplicationRecord
   belongs_to :survey
+
+  def question
+    @question ||= Question.find(question_id)
+  end
 end

app/models/question.rb

@@ -1,3 +1,8 @@
 class Question < FrozenRecord::Base
   FrozenRecord::Base.base_path = "db/frozen"
+
+  CATEGORIES = {
+    emotional: "emotional",
+    physical: "physical"
+  }
 end

app/services/survey_generator.rb

@@ -0,0 +1,16 @@
+class SurveyGenerator
+  def self.generate_for_user(user)
+    survey = Survey.create!(user: user)
+
+    # TODO: Implement logic that will generate survey with questions based on answers from previous surveys.
+    # For now we'll just use a random sampling of questions from each category.
+    Question::CATEGORIES.each do |_, category|
+      questions = Question.where(category: category).sample(2)
+      questions.each do |question|
+        Answer.create!(question_id: question.id, survey: survey)
+      end
+    end
+
+    survey
+  end
+end

config/routes.rb

@@ -6,9 +6,9 @@
   get "up" => "rails/health#show", as: :rails_health_check
 
   get "/questions", to: "survey#questions"
-  #get "/new", to: "users#new"
+  # get "/new", to: "users#new"
   Rails.application.routes.draw do
-    resources :users, only: [:new, :create]  # Makes only `new` and `create` actions available for users
+    resources :users, only: [ :new, :create ]  # Makes only `new` and `create` actions available for users
   end
 
   # Render dynamic PWA files from app/views/pwa/* (remember to link manifest in application.html.erb)

db/frozen/questions.yml

@@ -7,4 +7,12 @@
 - id: 3
   category: 'physical'
   text: 'I sleep well & feel rested upon waking'
-  
+- id: 4
+  category: 'emotional'
+  text: 'I do not feel emotionally run-down or drained.'
+- id: 5
+  category: 'physical'
+  text: 'I do not experience stress-related dreams or nightmares.'
+- id: 6
+  category: 'emotional'
+  text: 'I have fun & engage in restorative activities daily.'

test/fixtures/answers.yml

@@ -1,11 +1,37 @@
 # Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
 
-answer_one:
+answered_one:
   question_id: 1
   survey: answered
   answer: 1
 
-answer_two:
+answered_two:
   question_id: 2
   survey: answered
   answer: 2
+
+answered_three:
+  question_id: 3
+  survey: answered
+  answer: 3
+
+answered_four:
+  question_id: 4
+  survey: answered
+  answer: 4
+
+unanswered_one:
+  question_id: 1
+  survey: unanswered
+
+unanswered_two:
+  question_id: 2
+  survey: unanswered
+
+unanswered_three:
+  question_id: 3
+  survey: unanswered
+
+unanswered_four:
+  question_id: 4
+  survey: unanswered

test/services/survey_generator_test.rb

@@ -0,0 +1,27 @@
+require "test_helper"
+
+class SurveyGeneratorTest < ActiveSupport::TestCase
+  test "generates a survey for a given user" do
+    user = users(:bob)
+    survey = SurveyGenerator.generate_for_user(user)
+
+    assert_equal user, survey.user
+  end
+
+  test "generates a survey with a sampling of questions from each category" do
+    user = users(:bob)
+    survey = SurveyGenerator.generate_for_user(user)
+
+    question_category_count = Question::CATEGORIES.keys.index_with(0)
+    survey.answers.each do |answer|
+      assert question_category_count.key?(answer.question.category.to_sym)
+      question_category_count[answer.question.category.to_sym] += 1
+    end
+
+    expected_count_from_each_category = 2
+    question_category_count.each do |category, count|
+      assert_equal expected_count_from_each_category, count,
+        "Incorrect number of questions from category: #{category}"
+    end
+  end
+end