Sample data generation

dashboard/lib/sample_data.rb

@@ -0,0 +1,199 @@
+include FactoryGirl::Syntax::Methods
+
+class SampleData
+  SAMPLE_TEACHER_EMAIL = 'testteacher@code.org'.freeze
+  SAMPLE_TEACHER_PASSWORD = '00secret'.freeze
+  SAMPLE_TEACHER_NAME = 'TestTeacher Codeberg'.freeze
+  SAMPLE_STUDENT_NAME_FORMAT = 'TestStudent%s Codeberg'.freeze
+  SAMPLE_STUDENT_NAME_REGEX = /TestStudent\d* Codeberg/
+
+  @@rng = nil
+
+  # Returns a seeded random number generator for consistent test data
+  def self.rng
+    @@rng ||= Random.new(0)
+  end
+
+  # Creates sample data
+  def self.seed
+    raise "Should not be run outside of development" unless CDO.rack_env?(:development)
+
+    # Create a test teacher
+    teacher = create_teacher SAMPLE_TEACHER_EMAIL, SAMPLE_TEACHER_PASSWORD,
+      SAMPLE_TEACHER_NAME
+
+    # Create normal-sized and large sections for each of CSF, CSD and CSP
+
+    create_section(
+      teacher: teacher, name: 'CSF 1',
+      login_type: Section::LOGIN_TYPE_PICTURE, grade: 2, age_min: 7,
+      age_max_inclusive: 9, script_name: 'coursea-2018', num_students: 30,
+      use_imperfect_results: true
+    )
+
+    create_section(
+      teacher: teacher, name: 'CSF 2 (Large)',
+      login_type: Section::LOGIN_TYPE_PICTURE, grade: 2, age_min: 7,
+      age_max_inclusive: 9, script_name: 'coursea-2018', num_students: 150,
+      use_imperfect_results: true
+    )
+
+    create_section(
+      teacher: teacher, name: 'CSD 1',
+      login_type: Section::LOGIN_TYPE_EMAIL, grade: 7, age_min: 13,
+      age_max_inclusive: 14, script_name: 'csd1-2018', num_students: 30,
+      use_imperfect_results: false
+    )
+
+    create_section(
+      teacher: teacher, name: 'CSD 2 (Large)',
+      login_type: Section::LOGIN_TYPE_EMAIL, grade: 7, age_min: 13,
+      age_max_inclusive: 14, script_name: 'csd1-2018', num_students: 150,
+      use_imperfect_results: false
+    )
+
+    create_section(
+      teacher: teacher, name: 'CSP 1',
+      login_type: Section::LOGIN_TYPE_EMAIL, grade: 10, age_min: 14,
+      age_max_inclusive: 16, script_name: 'csp1-2018', num_students: 30,
+      use_imperfect_results: false
+    )
+
+    create_section(
+      teacher: teacher, name: 'CSP 2 (Large)',
+      login_type: Section::LOGIN_TYPE_EMAIL, grade: 10, age_min: 14,
+      age_max_inclusive: 16, script_name: 'csp1-2018', num_students: 150,
+      use_imperfect_results: false
+    )
+  end
+
+  # Hard-delete the teacher and all of the teacher's sections and students
+  # and recreate. Sections and followers would be soft-deleted by
+  # dependency when we delete the teacher; but to not leave a trail of
+  # old test data behind, we explictly hard-delete.
+  def self.create_teacher(email, password, name)
+    # Delete any existing test data
+    user = User.find_by_email_or_hashed_email(email)
+    unless user.nil?
+      user.sections.each do |section|
+        # Hard-delete all students in each section.
+        section.students.each do |student_user|
+          raise "Not a sample student" unless student_user.name =~ SAMPLE_STUDENT_NAME_REGEX
+          raise "Should not be run outside of development" unless CDO.rack_env?(:development)
+          UserGeo.where(user_id: student_user.id).destroy_all
+          student_user.really_destroy!
+        end
+        # Hard-delete each section.
+        section.really_destroy!
+      end
+      UserGeo.where(user_id: user.id).destroy_all
+      # Delete the existing test teacher
+      raise "Not a sample teacher" unless user.name.eql? SAMPLE_TEACHER_NAME
+      raise "Not a sample teacher" unless user.email.eql? SAMPLE_TEACHER_EMAIL
+      raise "Should not be run outside of development" unless CDO.rack_env?(:development)
+      user.really_destroy!
+    end
+    # Create the test teacher
+    create :teacher, email: email, name: name,
+      password: password, terms_of_service_version: 1
+  end
+
+  # Generate a random gender choice with reasonable distributions
+  def self.random_gender
+    val = rng.rand(100)
+    gender = nil
+    case val
+    when 0..29
+      gender = "m"
+    when 30..59
+      gender = "f"
+    when 60..89
+      gender = nil
+    when 90..94
+      gender = "n"
+    when 95..99
+      gender = "o"
+    end
+    gender
+  end
+
+  # Create a test section
+  # Options is a hash with expected values:
+  #  :teacher - User object of teacher
+  #  :name - section name
+  #  :login_type - Section::LOGIN_TYPE_xxx value of login type for section
+  #  :grade - grade for section
+  #  :age_min - minimum age to generate for students
+  #  :age_max_inclusive - max age (inclusive) to generate for students
+  #  :script_name - name of script to assign for section
+  #  :num_students - number of students to generate for section
+  #  :use_imperfect_results - if true, generate some less than perfect
+  #    results. (CSF allows imperfect results, CSD and CSP do not.)
+  def self.create_section(options)
+    script = Script.get_from_cache(options[:script_name])
+    level_count = script.script_levels.count
+
+    # Create the section
+    section = create :section, script: script,
+      **options.slice(:teacher, :name, :login_type, :grade)
+
+    current_student = 0
+
+    # Create students in section
+    (1..options[:num_students]).each do
+      # Choose random properties and create student
+      age_min = options[:age_min]
+      age_max_inclusive = options[:age_max_inclusive]
+      current_student += 1
+
+      name = format(SAMPLE_STUDENT_NAME_FORMAT, current_student)
+      age = rng.rand(age_min..age_max_inclusive)
+      gender = random_gender
+      student_user = create :student, name: name, age: age, gender: gender
+
+      # Add student to section
+      create :follower, section: section, student_user: student_user
+
+      # Create random student progress.
+      pct_skipped = rng.rand(15)
+      pct_imperfect = options[:use_imperfect_results] ? rng.rand(25..65) +
+        pct_skipped : 0
+
+      max_level =
+        if rng.rand(100) < 90
+          (level_count.to_f * rng.rand(0.2..0.8)).to_i
+        else
+          # To simulate real-world data, some students have no progress
+          0
+        end
+
+      # Create progress for this student on each level, up to a random
+      # max level
+      current_level = 0
+      script.script_levels.each do |script_level|
+        break if current_level == max_level
+
+        # Roll the dice to decide if progress is completed, perfect, or
+        # skipped for this level
+        rand_val = rng.rand(100)
+        best_result =
+          if rand_val < pct_skipped
+            nil
+          elsif rand_val < pct_imperfect
+            ActivityConstants::MINIMUM_PASS_RESULT
+          else
+            ActivityConstants::BEST_PASS_RESULT
+          end
+
+        # Save progress for this level if not skipping
+        if best_result
+          create :user_level, user: student_user, script_id: script.id,
+            level_id: script_level.level_id, attempts: 1,
+            best_result: best_result
+        end
+
+        current_level += 1
+      end
+    end
+  end
+end

dashboard/lib/tasks/seed.rake

@@ -215,6 +215,10 @@ namespace :seed do
     Census::StateCsOffering.seed
   end
 
+  task sample_data: :environment do
+    SampleData.seed
+  end
+
   MAX_LEVEL_SOURCES = 10_000
   desc "calculate solutions (ideal_level_source) for levels based on most popular correct solutions (very slow)"
   task ideal_solutions: :environment do