Add QR Code generation and sharing

.database_consistency.todo.yml

@@ -3,3 +3,6 @@ Profile:
   self_ref:
     MissingIndexChecker:
       enabled: false
+  uuid:
+    ColumnPresenceChecker:
+      enabled: false

Gemfile

@@ -29,6 +29,7 @@ gem "avo", ">= 3.2.1"
 
 # Other
 gem "bootsnap", require: false
+gem "draper"
 gem "inline_svg"
 gem "puma", ">= 5.0"
 gem "ransack"

Gemfile.lock

@@ -58,6 +58,10 @@ GEM
       globalid (>= 0.3.6)
     activemodel (7.1.3.4)
       activesupport (= 7.1.3.4)
+    activemodel-serializers-xml (1.0.2)
+      activemodel (> 5.x)
+      activesupport (> 5.x)
+      builder (~> 3.1)
     activerecord (7.1.3.4)
       activemodel (= 7.1.3.4)
       activesupport (= 7.1.3.4)
@@ -166,6 +170,13 @@ GEM
     diff-lcs (1.5.1)
     docile (1.4.0)
     dotenv (3.1.2)
+    draper (4.0.2)
+      actionpack (>= 5.0)
+      activemodel (>= 5.0)
+      activemodel-serializers-xml (>= 1.0)
+      activesupport (>= 5.0)
+      request_store (>= 1.0)
+      ruby2_keywords
     drb (2.2.1)
     dry-configurable (1.2.0)
       dry-core (~> 1.0, < 2)
@@ -375,6 +386,8 @@ GEM
     regexp_parser (2.9.2)
     reline (0.5.9)
       io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
     rexml (3.3.2)
       strscan
     rouge (4.3.0)
@@ -436,6 +449,7 @@ GEM
       rubocop (~> 1.61)
       rubocop-rspec (~> 3, >= 3.0.1)
     ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
     ruby_parser (3.21.0)
       racc (~> 1.5)
       sexp_processor (~> 4.16)
@@ -546,6 +560,7 @@ DEPENDENCIES
   database_consistency
   debug
   dotenv
+  draper
   erb_lint
   factory_bot_rails
   faker

app/controllers/application_controller.rb

@@ -1,3 +1,11 @@
 class ApplicationController < ActionController::Base
   include Authentication
+
+  rescue_from ActiveRecord::RecordNotFound, with: :record_not_found
+
+  private
+
+  def record_not_found
+    render file: Rails.public_path.join("404.html").to_s, status: :not_found, layout: false
+  end
 end

app/controllers/profiles_controller.rb

@@ -1,12 +1,28 @@
 class ProfilesController < ApplicationController
+  before_action :set_profile, only: :show
+
   def show
-    @profile = current_profile
+    @profile = @profile.decorate
+  end
+
+  def new
+    @profile = current_user.build_profile
   end
 
   def edit
     @profile = current_profile
   end
 
+  def create
+    @profile = current_user.build_profile(profile_params)
+
+    if @profile.save
+      redirect_to profile_path, notice: t("controllers.profiles.create.success")
+    else
+      render :new, status: :unprocessable_entity
+    end
+  end
+
   def update
     @profile = current_profile
     @profile.assign_attributes(profile_params)
@@ -21,6 +37,10 @@ def update
 
   private
 
+  def set_profile
+    @profile = Profile.public_profiles.find_by!(uuid: params[:uuid])
+  end
+
   def current_profile
     current_user.profile || current_user.build_profile
   end

app/decorators/profile_decorator.rb

@@ -0,0 +1,13 @@
+class ProfileDecorator < Draper::Decorator
+  delegate_all
+
+  def svg_qr_code(options = {})
+    RQRCode::QRCode.new(profile_url).as_svg(options)
+  end
+
+  private
+
+  def profile_url
+    Rails.application.routes.url_helpers.profile_url(object.uuid)
+  end
+end

app/models/profile.rb

@@ -13,13 +13,15 @@
 #  name                 :string
 #  profileable_type     :string           not null
 #  twitter_url          :string
+#  uuid                 :string
 #  created_at           :datetime         not null
 #  updated_at           :datetime         not null
 #  profileable_id       :integer          not null
 #
 # Indexes
 #
 #  index_profiles_on_profileable  (profileable_type,profileable_id)
+#  index_profiles_on_uuid         (uuid) UNIQUE
 #
 class Profile < ApplicationRecord
   has_one_attached :image
@@ -29,4 +31,16 @@ class Profile < ApplicationRecord
   has_one :speaker, through: :self_ref, source: :profileable, source_type: "Speaker"
 
   belongs_to :profileable, polymorphic: true
+
+  validates :uuid, uniqueness: true, presence: true
+
+  before_validation :set_uuid
+
+  scope :public_profiles, -> { where(is_public: true) }
+
+  private
+
+  def set_uuid
+    self.uuid ||= SecureRandom.uuid
+  end
 end

app/views/profiles/show.html.erb

@@ -55,6 +55,7 @@
       </div>
     </div>
   </div>
+  <%= render inline: @profile.svg_qr_code(module_size: 4) %>
   <div class="p-4 flex flex-col items-center gap-4 w-full">
     <%= link_to 'Edit Profile', edit_profile_path, class: "text-red font-bold rounded-sm underline italic text-lg" %>
   </div>

config/environments/development.rb

@@ -33,6 +33,8 @@
     config.cache_store = :null_store
   end
 
+  Rails.application.routes.default_url_options[:host] = "localhost:3000"
+
   # Store uploaded files on the local file system (see config/storage.yml for options).
   config.active_storage.service = :local
 
@@ -82,4 +84,7 @@
 
   # Raise error when a before_action's only/except options reference missing actions
   config.action_controller.raise_on_missing_callback_actions = true
+
+  # Allow ngrok hosts
+  config.hosts << /[a-z0-9.\-]+\.ngrok\.io/
 end

config/environments/test.rb

@@ -34,6 +34,8 @@
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
+  Rails.application.routes.default_url_options[:host] = "localhost:3000"
+
   # Store uploaded files on the local file system in a temporary directory.
   config.active_storage.service = :test
 

config/initializers/inflections.rb

@@ -11,6 +11,6 @@
 # end
 
 # These inflection rules are supported but not enabled by default:
-# ActiveSupport::Inflector.inflections(:en) do |inflect|
-#   inflect.acronym "RESTful"
-# end
+ActiveSupport::Inflector.inflections(:en) do |inflect|
+  inflect.acronym "QR"
+end

config/routes.rb

@@ -14,4 +14,6 @@
   resource :password_reset, only: [:new, :create, :edit, :update] do
     get :post_submit
   end
+
+  resources :profiles, only: [:show, :edit, :update], param: :uuid
 end

db/migrate/20240710213305_add_profile_uuid_to_profile.rb

@@ -0,0 +1,6 @@
+class AddProfileUuidToProfile < ActiveRecord::Migration[7.1]
+  def change
+    add_column :profiles, :uuid, :string
+    add_index :profiles, :uuid, unique: true
+  end
+end

spec/controllers/profiles_controller_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe ProfilesController, type: :controller do
+  let(:profile) { create(:profile, :with_user, :public) }
+
+  before do
+    sign_in(profile.user)
+  end
+
+  describe "GET #show" do
+    it "returns a success response" do
+      get :show, params: {uuid: profile.uuid}
+      expect(response).to have_http_status(:success)
+    end
+
+    context "when the profile is not public" do
+      let(:profile) { create(:profile, :with_user, is_public: false) }
+
+      it "returns a not found response" do
+        get :show, params: {uuid: profile.uuid}
+        expect(response).to have_http_status(:not_found)
+      end
+    end
+  end
+end

spec/decorators/profile_decorator_spec.rb

@@ -0,0 +1,11 @@
+require "rails_helper"
+
+RSpec.describe ProfileDecorator do
+  let(:profile) { create(:profile, :with_user).decorate }
+
+  describe "#svg_qr_code" do
+    it "generates a QR code SVG" do
+      expect(profile.svg_qr_code).to include("<svg")
+    end
+  end
+end

spec/factories/profiles.rb

@@ -13,13 +13,15 @@
 #  name                 :string
 #  profileable_type     :string           not null
 #  twitter_url          :string
+#  uuid                 :string
 #  created_at           :datetime         not null
 #  updated_at           :datetime         not null
 #  profileable_id       :integer          not null
 #
 # Indexes
 #
 #  index_profiles_on_profileable  (profileable_type,profileable_id)
+#  index_profiles_on_uuid         (uuid) UNIQUE
 #
 FactoryBot.define do
   factory :profile do
@@ -30,9 +32,14 @@
     github_url { "https://github.com" }
     linkedin_url { "https://linkedin.com" }
     twitter_url { "https://twitter.com" }
+    uuid { SecureRandom.uuid }
 
     trait :with_user do
       association :profileable, factory: :user
     end
+
+    trait :public do
+      is_public { true }
+    end
   end
 end

spec/models/profile_spec.rb

@@ -13,13 +13,15 @@
 #  name                 :string
 #  profileable_type     :string           not null
 #  twitter_url          :string
+#  uuid                 :string
 #  created_at           :datetime         not null
 #  updated_at           :datetime         not null
 #  profileable_id       :integer          not null
 #
 # Indexes
 #
 #  index_profiles_on_profileable  (profileable_type,profileable_id)
+#  index_profiles_on_uuid         (uuid) UNIQUE
 #
 require "rails_helper"
 
@@ -29,4 +31,13 @@
   it "has a valid factory" do
     expect(profile).to be_valid
   end
+
+  describe "callbacks" do
+    let(:profile) { build(:profile, :with_user) }
+
+    it "sets a UUID before creation" do
+      profile.save
+      expect(profile.uuid).to be_present
+    end
+  end
 end