[WIP] Adding liquid

Gemfile

@@ -45,6 +45,9 @@ gem 'redcarpet'
 
 gem 'sidekiq'
 
+gem 'liquid', '~> 4.0'
+gem 'liquid-c', '~> 4.0'
+
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 

Gemfile.lock

@@ -126,6 +126,9 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (2.2.0)
+    liquid (4.0.3)
+    liquid-c (4.0.0)
+      liquid (>= 3.0.0)
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -311,6 +314,8 @@ DEPENDENCIES
   guard-rspec
   jbuilder (~> 2.5)
   jquery-rails
+  liquid (~> 4.0)
+  liquid-c (~> 4.0)
   listen (~> 3.0.5)
   pg
   puma (~> 3.12)

app/controllers/application_controller.rb

@@ -9,8 +9,13 @@ class ApplicationController < ActionController::Base
 
   def user_logged_in?
     return if logged_in?
+
     store_location
     flash[:danger] = 'Please log in.'
     redirect_to login_url
   end
+
+  def render_liquid_template(template, data: {})
+    render html: Liquid::Template.parse(template).render!(data, strict_variables: true).html_safe
+  end
 end

app/models/drops/category_drop.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class CategoryDrop < Liquid::Drop
+  def initialize(category)
+    @category = category
+  end
+
+  def name
+    @category.name
+  end
+
+  def challenges
+    @challenges ||= @category&.challenges&.map { |challenge| ChallengeDrop.new(challenge) }
+  end
+end

app/models/drops/challenge_drop.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+class ChallengeDrop < Liquid::Drop
+  # TODO: add challenge_files
+  def initialize(challenge)
+    @challenge = challenge
+  end
+
+  def title
+    @challenge.title
+  end
+
+  def points
+    @challenge.points
+  end
+
+  def max_tries
+    @challenge.max_tries
+  end
+
+  def description
+    @challenge.description.to_md
+  end
+
+  def raw_description
+    @challenge.description
+  end
+
+  def category
+    @category ||= CategoryDrop.new(@challenge&.category)
+  end
+
+  def challenge_files
+    @challenge_files ||= @challenge&.challenge_files&.map { |f| ChallengeFileDrop.new(f) }
+  end
+end

app/models/drops/challenge_file_drop.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class ChallengeFileDrop < Liquid::Drop
+  def initialize(challenge_file)
+    @challenge_file = challenge_file
+  end
+
+  def filename
+    @challenge_file&.filename&.to_s
+  end
+
+  def path
+    Rails.application.routes.url_helpers.rails_blob_path(
+      @challenge_file, disposition: 'attachment', only_path: true
+    )
+  end
+end

app/models/drops/team_drop.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class TeamDrop < Liquid::Drop
+  def initialize(team)
+    @team = team
+  end
+
+  def name
+    @team.name
+  end
+
+  def invitation_token
+    @team&.invitation_token
+  end
+
+  def score
+    @team&.score
+  end
+
+  def users
+    @users ||= @team&.users&.map { |user| UserDrop.new(user) }
+  end
+end

app/models/drops/user_drop.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class UserDrop < Liquid::Drop
+  def initialize(user)
+    @user = user
+  end
+
+  def name
+    @user.name
+  end
+
+  def username
+    @user.username
+  end
+
+  def team
+    @team ||= TeamDrop.new(@user&.team)
+  end
+end

config/application.rb

@@ -24,5 +24,6 @@ class Application < Rails::Application
     config.logger                   = ActiveSupport::TaggedLogging.new(logger)
     config.active_job.queue_adapter = :sidekiq
     config.autoload_paths << Rails.root.join('lib')
+    config.autoload_paths << Rails.root.join('app', 'models', 'drops')
   end
 end