sample-code-snippets

question_render.js

/**
 * Module for QHash Application
 * @author : Amitesh Kumar
 * 
 */
 window.QHash = window.QHash || {};
 ( function ( QHash ) {
 		/**
		 * Answer Model
		 * @param  {[type]} answer [description]
		 * @return {[type]}        [description]
		 */
		var Answer = function(answer){
			answer = answer || {};
			this.content 			= answer["content"];
      this.id 					= answer["id"] || (new Date().getTime());
      this.is_correct 	= answer["is_correct"];
      this.order_no 		= answer["order_no"];
      this.question_id 	= answer["question_id"];
      this.updated_at 	= answer["updated_at"];
      this.created_at 	= answer["created_at"];
      this.answerType   = answer["answer_type"] || 1;
      this.isNew  			= !!!answer["id"];
		};
		Answer.prototype = {
			isSingleChoice: function(){
				return this.answerType() == 1;
			},
			isMultipleChoice: function(){
				return this.answerType() == 2;
			},
			isSubjective: function(){
				return this.answerType() == 3;
			},
      remove: function(){
      	alert("removed...")
      }
		};

		/**
		 * Question handler class
		 * @return {[type]} [description]
		 */
    QHash.QuestionRender = (function(){
  		var answers = {};
			var answerTypeSelect = "#question_answer_type";
			var answerType = function(){ return $( answerTypeSelect ).val(); }
			var answersCont;
			
			return {
			
				init: function(){
					answersCont = $("#answers")
					this.refreshAnswers();
					this.initUI();
				},

				refreshAnswers: function(){
					answers = {};
					for (var i = 0; i < answers_data.length; i++) {
						this.setAnswer(answers_data[i]);
					};
					this.render();
				},

				initUI: function(){
					var me = this;
					$( answerTypeSelect ).change(function(){
						me.render();
					});

					$(answersCont).on('change', 'input:radio', function(){
						$(".answer-hd", answersCont).val(false);
						$(this).parent().find(':hidden').val( $(this).is(':checked') ? true : false );
					});

					$(answersCont).on('change', 'input:radio, input:checkbox, input:text', function(){
						var id = $(this).data('answer-id');
						var answer = answers[id];
						
						if(answer){
							if($(this).is(':text')){
								answer.content = $(this).val();
							}else if($(this).is(':radio')){

								$.each(answers, function(key, value) { 
									value.is_correct = false;
									answers[key] = value;
								});

								answer.is_correct = $(this).is(':checked') ? true : false;	

							}else{
								answer.is_correct = $(this).is(':checked') ? true : false;	
							}
							
							answers[id] = answer;
						} // if end
					});

					$(answersCont).on('click', '.remove-answer-btn', function(event){ 
						return me.removeAnswer(event)
					});

					$('.add-new-answer').on('click', function(){ 
						return me.addNewAnswer(); 
					});
				},

				setAnswer: function(answer){
					var ans = new Answer( answer );
							ans.answerType = answerType;
							answers[ans.id] = ans;
				},

				getAnswers: function(){
					var answrs = [];
					$.each(answers, function(key, value) { answrs.push(value) });
					return answrs
				},

				render: function(){
					var template = Handlebars.compile( $("#answer-template").html() );
					answersCont.html( template({answers: this.getAnswers()}));

					$('input:radio', answersCont).each(function(){
						$(this).parent().find(':hidden').val($(this).is(':checked')? true : false);
					})
				},

				addNewAnswer: function(){
					var ans = new Answer();
							ans.answerType = answerType;
					
							answers[ans.id] = ans;
							this.render();
					return false;
				},

				removeAnswer: function(event){
					var me = this;
					var elem = $(event.target);
					var id = elem.data('answer-id');
					var answer = answers[id];
					
					if(answer){
						if(answer.isNew){
							delete answers[id];
							this.render();
						}else{
							$.post( elem.attr('href'), function() {
							  delete answers[id];
							  me.render();
							}).fail(function( jqXHR, textStatus, error) {
								// console.log( arguments );
							  alert( jqXHR.responseJSON.error );
							}).always(function() {
							});
						}
					}
					return false;
				}
			};
    })();
} )( window.QHash );

user.rb

# User model
# == Schema Information
#
# Table name: users
#
#  id                     :integer          not null, primary key
#  email                  :string(255)      default(""), not null
#  encrypted_password     :string(255)      default(""), not null
#  reset_password_token   :string(255)
#  reset_password_sent_at :datetime
#  remember_created_at    :datetime
#  sign_in_count          :integer          default(0), not null
#  current_sign_in_at     :datetime
#  last_sign_in_at        :datetime
#  current_sign_in_ip     :string(255)
#  last_sign_in_ip        :string(255)
#  confirmation_token     :string(255)
#  confirmed_at           :datetime
#  confirmation_sent_at   :datetime
#  unconfirmed_email      :string(255)
#  failed_attempts        :integer          default(0), not null
#  unlock_token           :string(255)
#  locked_at              :datetime
#  created_at             :datetime
#  updated_at             :datetime
#  username               :text
#  username_lowercase     :text
#  admin                  :boolean          default(FALSE), not null
#  show_app_caveat        :boolean          default(TRUE), not null
#  apps_count             :integer          default(0), not null
#  app_families_count     :integer          default(0), not null
#  payments_count         :integer          default(0), not null
#

# A user of the app. Uses [Devise](https://github.com/plataformatec/devise) for
# authentication.
class User < ActiveRecord::Base
# 1. Configuration

  devise :database_authenticatable, :registerable, :recoverable, :rememberable,
    :trackable, :validatable, :timeoutable, :confirmable

  include FriendlyId
  friendly_id :username_lowercase

# 2. Attributes

  # @private
  attr_accessor :login
  attr_readonly :username_lowercase

  def to_s; username; end

  def has_unidentified_apps?
    # Filter out any unidentified apps which have no app identifiers.  There
    # shouldn't be any anyway, but stay on the safe side, because if they do
    # find their way into the DB, the user will receive the 'you have orphaned
    # data' message, but won't be able to do anything about it.
    self.apps.unidentified.select { |a| a.app_identifiers.any? }.any?
  end

  # Note regarding show_app_caveat: This boolean determines whether the 'app
  # caveat' notification should be displayed on an app's show page. It's true
  # when the user is first created, then they set it to false by clicking
  # "don't show this again". This is a very simple implementation and is NOT a
  # good idea if the app grows to the point where users have lots of
  # dismissable notifications. I'm doing it this way for now just because
  # there's only one notification for the time being so it's not worth the
  # effort of a more complicated system.

# 3. Validations

  VALID_USERNAME_REGEX ||= /\A[A-Za-z][A-Za-z0-9_]*\z/
  DISALLOWED_USERNAMES ||= YAML::load_file("config/disallowed_names.yml")

  validates_presence_of :username
  validates :username, uniqueness: { case_sensitive: false },
      length: { minimum: 5, maximum: 20 },
      format: {
        with: VALID_USERNAME_REGEX,
        message: "can only contain letters, numbers and underscores"
      }, :if => "self.username.present?"

  validate :username_cant_be_a_reserved_word, :if => "self.username?"

# 4. Associations

  include User::PaymentAssociations

  has_many :app_families, dependent: :destroy
  has_many :apps, dependent: :destroy
  has_many :app_problems, through: :apps, source: :problems,
                      :class_name => Diagnostics::AppProblem
  has_many :metric_time_slices, through: :apps
  has_many :app_identifiers, through: :apps, dependent: :destroy
  has_many :connections, dependent: :destroy
  has_many :data_sources, through: :connections
  has_many :ad_networks, -> { merge(DataSource.ad_networks) }, through: :connections, source: :data_source
  has_many :marketplaces, -> { merge(DataSource.marketplaces) }, through: :connections, source: :data_source

  # @param data_source [DataSource] a data source.
  # @return [Boolean] whether the user has added credentials for the given data 
  #   source.
  def connected_to?(data_source)
    data_sources.include?(data_source)
  end

  # The user's apps which aren't connected to a specified data source. Used
  # to identify unidentified apps. A user might have not yet identified one
  # of their apps for a particular data source. When we receive unidentified data
  # for that data source, we want to know which apps don't already have an
  # identifier for that data source, because the unidentified data might belong
  # to one of them.
  #
  # @option opts [DataSource] :data_source A data source. (required)
  # @return [ActiveRecord::Relation<App>] All of the user's apps which are **a)**
  #   not unidentified and **b)** don't already have an `AppIdentifier` connecting
  #   them to the given data source.
  def mergeable_apps(opts={})
    data_source = opts.fetch(:data_source)
    data_source.apps.missing.where(user_id: self.id).identified

    # Note that this first attempt doesn't work:
    #
    #   self.apps.includes(:data_sources).identified
    #     .where.not(app_identifiers: { data_source_id: data_source.id })
    #
    # because if an app is connected to ANY data_source other than the given one
    # , then the condition `data_source.id != (excluded data source).id` will
    # be true for that row of the left outer join, so the app will be returned
    # even if it's not connected to the specified data source.
  end

# 5. Scopes


# 6. Callbacks

  before_save { |u| u.username = u.username.downcase }
  before_save { |u| u.username_lowercase = u.username.downcase }

  # Override the Devise method so that Users can log in using either their
  # email or username. goo.gl/yXDJd3
  def self.find_first_by_auth_conditions(warden_conditions)
    conditions = warden_conditions.dup
    if login = conditions.delete(:login)
      where(conditions).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first
    else
      where(conditions).first
    end
  end


  def to_param
    self.username.downcase
  end

  private

    # Can't use validates_exclusion_of because it needs to be case-insensitive
    def username_cant_be_a_reserved_word
      if DISALLOWED_USERNAMES.include? self.username.downcase 
        errors[:username] << "is not an allowed username"
      end
    end

end

user_spec.rb

# == Schema Information
#
# Table name: users
#
#  id                     :integer          not null, primary key
#  email                  :string(255)      default(""), not null
#  encrypted_password     :string(255)      default(""), not null
#  reset_password_token   :string(255)
#  reset_password_sent_at :datetime
#  remember_created_at    :datetime
#  sign_in_count          :integer          default(0), not null
#  current_sign_in_at     :datetime
#  last_sign_in_at        :datetime
#  current_sign_in_ip     :string(255)
#  last_sign_in_ip        :string(255)
#  confirmation_token     :string(255)
#  confirmed_at           :datetime
#  confirmation_sent_at   :datetime
#  unconfirmed_email      :string(255)
#  failed_attempts        :integer          default(0), not null
#  unlock_token           :string(255)
#  locked_at              :datetime
#  created_at             :datetime
#  updated_at             :datetime
#  username               :text
#  username_lowercase     :text
#  admin                  :boolean          default(FALSE), not null
#  show_app_caveat        :boolean          default(TRUE), not null
#  apps_count             :integer          default(0), not null
#  app_families_count     :integer          default(0), not null
#  payments_count         :integer          default(0), not null
#

require 'spec_helper'

describe User do

  let(:email) { "[email protected]" }
  let(:pw) { "foobar123" }
  let(:username) { "ExampleUser"}

  let(:user) do
    User.new(email: email,
      password: pw,
      password_confirmation: pw,
      username: username
    )
  end

  subject { user }

# 1. Configuration

# 2. Attributes

  it { should have_readonly_attribute :username_lowercase }

  describe "#paid?" do
    before { user.save! }
    # Reload user so that it registers the update to payments_count
    subject { user.reload.paid? }
    context "when user has no Payments" do
      it { should be_false }
    end

    context "when user's most recent payment" do
      before { create(:payment, user: user, date: date) }
      context "is more than than 1 month + Payment::GRACE_PERIOD ago" do
        let(:date) { Payment.cutoff_date - 1.day }
        it { should be_false }
      end
      context "is less than than 1 month + Payments::GRACE_PERIOD ago" do
        let(:date) { Payment.cutoff_date + 1.day }
        it { should be_true }
      end
    end
  end

  describe "#date_of_most_recent_payment" do
    subject { user.date_of_most_recent_payment }
    context "when the user" do
      context "has no payments" do
        it { should be_nil }
      end

      context "has payments" do
        before do
          user.save!
          create(:payment, user: user, date: "2014-05-02")
          create(:payment, user: user, date: "2014-05-01")
        end
        it "returns the date of the most recent payment" do
          expect(subject).to eq Date.parse("2014-05-02")
        end
      end
    end
  end

# 3. Validations

  it { should validate_uniqueness_of(:username).case_insensitive }
  it { should validate_presence_of(:username) }
  it do
    disallowed_usernames = YAML::load_file("config/disallowed_names.yml")
    should ensure_exclusion_of(:username).\
      in_array(disallowed_usernames).with_message("is not an allowed username")
  end
  it { should ensure_length_of(:username).is_at_least(5).is_at_most(20) }
  it do
    should allow_value(
      "john", "john1234", "abcdefghijklmnop"
    ).for(:username)
  end
  it do
    should_not allow_value(
      "shrt", "long5678901234568901", "3startswithnumber", "specialchar!"
    ).for(:username)
  end

  it { should be_valid }

# 4. Associations

  it { should have_many(:apps).dependent(:destroy) }
  it { should have_many(:app_problems).through(:apps) }
  it { should have_many(:app_families).dependent(:destroy) }
  it { should have_many(:data_sources) }
  it { should have_many(:connections).dependent(:destroy) }
  it { should have_many(:app_families) }
  it { should have_many(:app_identifiers) }
  it { should have_many(:marketplaces) }
  it { should have_many(:ad_networks) }
  it { should have_many(:payments).dependent(:destroy) }

  describe "#connected_to?(data_source)" do
    let(:ds) { create(:data_source) }
    before { user.save! }
    subject { user.connected_to?(ds) }
    context "when the user is connected to the data source" do
      it "returns true" do
        user.connections.create(data_source: ds, credential_1: "xxxx")
        should be_true
      end
    end

    context "when the user is not connected to the data source" do
      it "returns false" do
        should be_false
      end
    end
  end

# 5. Scopes

# 6. Callbacks

  describe "username_lowercase" do
    it "is set to username.downcase before save" do
      user.save!
      expect(user.username_lowercase).to eq username.downcase
    end
  end

end