Add active_language controller and cookie storage

app/controllers/active_language_controller.rb

@@ -0,0 +1,10 @@
+class ActiveLanguageController < ApplicationController
+
+  def set_active_language
+    if Language.find_by_id(params[:active_language_id]) != nil
+      cookies[:active_language_id] = params[:active_language_id]
+    else
+      redirect_to root_path, status: :unprocessable_entity
+    end
+  end
+end

app/controllers/admin/languages_controller.rb

@@ -1,4 +1,4 @@
-class LanguagesController < ApplicationController
+class Admin::LanguagesController < ApplicationController
 
   def index
     @languages = Language.all
@@ -12,7 +12,7 @@ class LanguagesController < ApplicationController
     @language = Language.new(language_params)
     if @language.save
       flash[:notice] = "Language successfully created."
-      redirect_to languages_path
+      redirect_to admin_languages_path
     else
       render :new, status: :unprocessable_entity
     end
@@ -26,7 +26,7 @@ class LanguagesController < ApplicationController
     @language = Language.find_by_id(params[:id])
     if @language.update(language_params)
       flash[:notice] = "Language successfully updated."
-      redirect_to languages_path
+      redirect_to admin_languages_path
     else
       render :edit, status: :unprocessable_entity
     end
@@ -36,7 +36,7 @@ class LanguagesController < ApplicationController
     @language = Language.find_by_id(params[:id])
     if @language.destroy
       flash[:notice] = "Language successfully deleted."
-      redirect_to languages_path
+      redirect_to admin_languages_path
     else
       render :index, status: :not_modified
     end

app/helpers/active_language_helper.rb

@@ -0,0 +1,8 @@
+module ActiveLanguageHelper
+
+  def active_language_select_tag
+    languages = Language.all.to_a.delete_if {|language| language.name == "English" }
+    options = options_from_collection_for_select(languages, "id", "name", cookies[:active_language_id] || 1)
+    select_tag "active_language_id", options
+  end
+end

app/views/admin/languages/_form.html.erb

@@ -1,4 +1,4 @@
-<%= form_for language do |f| %>
+<%= form_for [:admin, language] do |f| %>
   <%= f.label :name %>
   <%= f.text_field :name %><br/>
   <br/>

app/views/admin/languages/edit.html.erb

@@ -0,0 +1,5 @@
+<%= render "admin/languages/errors", language: @language %>
+
+<h1>Edit Language</h1>
+
+<%= render "admin/languages/form", language: @language %>

app/views/admin/languages/index.html.erb

@@ -7,9 +7,9 @@
 <% @languages.each do |language| %>
   <tr>
     <td><%= language.name %></td>
-    <td><%= link_to "Edit", edit_language_path(language) %></td>
+    <td><%= link_to "Edit", edit_admin_language_path(language) %></td>
     <td> | </td>
-    <td><%= link_to "Delete", language_path(language), data: { turbo_method: :delete,
+    <td><%= link_to "Delete", admin_language_path(language), data: { turbo_method: :delete,
                                                                turbo_confirm: "Are you sure?" } %></td>
   </tr>
 <% end %>
@@ -17,4 +17,4 @@
 
 <br/>
 <br/>
-<%= link_to "New Language", new_language_path %>
+<%= link_to "New Language", new_admin_language_path %>

app/views/admin/languages/new.html.erb

@@ -0,0 +1,5 @@
+<%= render "admin/languages/errors", language: @language %>
+
+<h1>New Language</h1>
+
+<%= render "admin/languages/form", language: @language %>

app/views/application/_partsofspeech.html.erb

@@ -1,4 +1,5 @@
 <h1>Parts of Speech</h1>
+
 <table>
   <tr>
     <td><b>Part of Speech</b></td>
@@ -11,4 +12,3 @@
   </tr>
 <% end %>
 </table>
-

app/views/languages/edit.html.erb

@@ -1,5 +0,0 @@
-<%= render "languages/errors", language: @language %>
-
-<h1>Edit Language</h1>
-
-<%= render "languages/form", language: @language %>

app/views/languages/new.html.erb

@@ -1,5 +0,0 @@
-<%= render "languages/errors", language: @language %>
-
-<h1>New Language</h1>
-
-<%= render "languages/form", language: @language %>

app/views/layouts/application.html.erb

@@ -17,7 +17,12 @@
           <%= link_to "Dictionary", dictionary_index_path %>
           <% if user_signed_in? %>
             <pre style="display: inline;">|</pre>
-            <%= link_to "Languages", languages_path %>
+            <%= link_to "Languages", admin_languages_path %>
+            <pre style="display: inline;">|</pre>
+            <%= form_tag '/set_active_language', class: "d-inline" do %>
+              <%= active_language_select_tag %>
+              <%= submit_tag "Switch Language" %>
+            <% end %>
           <% end %>
         </div>
         <div class="ms-auto p-2">

config/routes.rb

@@ -1,9 +1,14 @@
 Rails.application.routes.draw do
   devise_for :users
   #get 'dictionary/index'
-  resources :dictionary, only: [:index, :show]
+  resources :dictionary, only: [:index, :show, :create]
   resources :words, only: [:index, :show]
-  resources :languages
+
+  post '/set_active_language', action: :set_active_language, controller: :active_language
+
+  namespace :admin do
+    resources :languages
+  end
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.

spec/factories/languages.rb

@@ -1,5 +1,9 @@
 FactoryBot.define do
   factory :language do
-    name { "MyString" }
+    sequence(:name) { |n| "MyString#{n.to_s}" }
+  end
+
+  factory :language_english, class: :language do
+    name { "English" }
   end
 end

spec/helpers/active_language_helper_spec.rb

@@ -0,0 +1,31 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the ActiveLanguageHelper. For example:
+#
+# describe ActiveLanguageHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe ActiveLanguageHelper, type: :helper do
+
+  describe "active_language_helper_tag" do
+    before :each do
+      english = FactoryBot.create(:language_english)
+      2.times { FactoryBot.create(:language) }
+      @tag = active_language_select_tag
+    end
+
+    it "should return a select tag" do
+      expect(@tag).to have_selector(%(select))
+    end
+
+    it "should not contain an English option" do
+      expect(@tag).to_not include("English")
+      
+    end
+  end
+end

spec/requests/active_language_spec.rb

@@ -0,0 +1,20 @@
+require 'rails_helper'
+
+RSpec.describe "ActiveLanguages", type: :request do
+
+  describe "POST :set_active_language" do
+    
+    it "should set the cookie" do
+      language = FactoryBot.create(:language)
+      post "/set_active_language/", params: { active_language_id: language.id }
+      expect(cookies[:active_language_id]).to_not be_nil
+    end
+
+    it "should not set the cookie if language does not exist" do
+      language = FactoryBot.create(:language)
+      id = language.id + 1
+      post "/set_active_language/", params: { active_language_id: id }
+      expect(response).to have_http_status(:unprocessable_entity)
+    end
+  end
+end

spec/requests/language_spec.rb

@@ -4,59 +4,59 @@ RSpec.describe "Languages", type: :request do
 
   describe "GET :index" do
     it "returns http success" do
-      get "/languages/"
+      get "/admin/languages/"
       expect(response).to have_http_status(:success)
     end
 
     it "lists all languages" do
       language = FactoryBot.create(:language)
-      get "/languages/"
+      get "/admin/languages/"
       expect(response.body).to include(language.name)
     end
 
     it "has a new-language link" do
-      get "/languages/"
-      expect(response.body).to have_selector(%(a[href="#{new_language_path}"]))
+      get "/admin/languages/"
+      expect(response.body).to have_selector(%(a[href="#{new_admin_language_path}"]))
     end
 
     it "has an edit button" do
       language = FactoryBot.create(:language)
-      get "/languages/"
+      get "/admin/languages/"
       expect(response.body).to have_link("Edit")
     end
 
     it "has a delete button" do
       language = FactoryBot.create(:language)
-      get "/languages/"
+      get "/admin/languages/"
       expect(response.body).to have_link("Delete")
     end
   end
 
   describe "GET :new" do
     it "returns http success" do
-      get "/languages/new"
+      get "/admin/languages/new"
       expect(response).to have_http_status(:success)
     end
 
     it "has a form for a new language" do
-      get "/languages/new"
+      get "/admin/languages/new"
       expect(response.body).to have_selector(%(input[name="language[name]"]))
     end
   end
 
   describe "POST :create" do
-    it "redirect to languages_path on success" do
-      post "/languages", params: { language: { name: "Test Name" } }
-      expect(response).to redirect_to(languages_path)
+    it "redirect to admin_languages_path on success" do
+      post "/admin/languages", params: { language: { name: "Test Name" } }
+      expect(response).to redirect_to(admin_languages_path)
     end
 
     it "creates a new language" do
-      post "/languages", params: { language: { name: "Test Name" } }
+      post "/admin/languages", params: { language: { name: "Test Name" } }
       expect(Language.count).to eq(1)
     end
 
     it "requires a name for a new language" do
-      post "/languages", params: { language: { name: nil } }
+      post "/admin/languages", params: { language: { name: nil } }
       expect(response).to have_http_status(:unprocessable_entity)
     end
   end
@@ -64,7 +64,7 @@ RSpec.describe "Languages", type: :request do
   describe "GET :edit" do
     before :each do
       @language = FactoryBot.create(:language)
-      get "/languages/#{@language.id}/edit"
+      get "/admin/languages/#{@language.id}/edit"
     end
 
     it "returns http success" do
@@ -83,13 +83,13 @@ RSpec.describe "Languages", type: :request do
     end
 
     it "updates a language" do
-      patch "/languages/#{@language.id}", params: @params
-      expect(response).to redirect_to(languages_path)
+      patch "/admin/languages/#{@language.id}", params: @params
+      expect(response).to redirect_to(admin_languages_path)
     end
 
     it "requires params to update a language" do
       @params = { language: { name: nil, invalid: "oh no" } }
-      patch "/languages/#{@language.id}", params: @params
+      patch "/admin/languages/#{@language.id}", params: @params
       expect(response).to have_http_status(:unprocessable_entity)
     end
 
@@ -99,7 +99,7 @@ RSpec.describe "Languages", type: :request do
     it "deletes a language" do
       language = FactoryBot.create(:language)
       language2 = FactoryBot.create(:language)
-      delete "/languages/#{language.id}"
+      delete "/admin/languages/#{language.id}"
       expect(Language.all).to eq([language2])
     end
   end

spec/requests/root_spec.rb

@@ -30,7 +30,7 @@ RSpec.describe "Root path", type: :request do
     it "should have the 'Languages' link" do
       sign_in FactoryBot.create(:user)
       get root_path
-      expect(response.body).to have_selector(%(a[href="#{languages_path}"]))
+      expect(response.body).to have_selector(%(a[href="#{admin_languages_path}"]))
     end
 
     it "should welcome user by username" do
@@ -39,5 +39,12 @@ RSpec.describe "Root path", type: :request do
       get root_path
       expect(response.body).to include(user.username)
     end
+
+    it "should have a language drop-down" do
+      user = FactoryBot.create(:user)
+      sign_in user
+      get root_path
+      expect(response.body).to have_field("active_language_id")
+    end
   end
 end