username validations

app/assets/stylesheets/users.scss

@@ -1,4 +1,10 @@
 .user {
+  .error {
+    p {
+      font-size: 14px;
+      color: red;
+    }
+  }
   .description {
     p {
       font-size: 14px;

app/controllers/landing_controller.rb

@@ -22,15 +22,13 @@ class LandingController < ApplicationController
     render_meeting
   end
 
-  def room
-    render_room
-  end
-
   def admin?
     @user == current_user
   end
   helper_method :admin?
+
   private
+  
   def render_meeting
     @resource = params[:resource]
     @meeting_token = params[:id] || @meeting_token = helpers.new_meeting_token

app/controllers/sessions_controller.rb

@@ -3,7 +3,7 @@ class SessionsController < ApplicationController
     @user = User.from_omniauth(request.env['omniauth.auth'])
     if @user.persisted?
       session[:user_id] = @user.id
-      redirect_to controller: 'landing', action: 'room', id: @user.username
+      redirect_to controller: 'landing', action: 'index', id: @user.username, resource: 'rooms'
     else
       @user.save!
       session[:user_id] = @user.id

app/controllers/users_controller.rb

@@ -9,8 +9,9 @@ class UsersController < ApplicationController
   # PATCH/PUT /users/1.json
   def update
     if @user.update(user_params)
-      redirect_to controller: 'landing', action: 'room', name: @user.username
+      redirect_to controller: 'landing', action: 'index', id: @user.username, resource: 'rooms'
     else
+      @error = @user.errors.first[1] rescue nil
       render :edit
     end
   end

app/models/user.rb

@@ -1,6 +1,10 @@
 class User < ApplicationRecord
 
-  validates :username, uniqueness: true
+  validates :username,
+    uniqueness: { message: "this username is taken" },
+    format: { with: /\A^[0-9a-z-_]+\Z/,
+    message: "Only allows lowercase alphanumeric characters with dashes and underscores",
+    allow_blank: true }
 
   def self.from_omniauth(auth_hash)
     user = find_or_initialize_by(uid: auth_hash['uid'], provider: auth_hash['provider'])

app/views/landing/meeting.html.erb

@@ -7,7 +7,11 @@
         <% if !current_user.nil? %>
           <span class="user">Hello <%= current_user.name %></span>
           <%= link_to "Logout", user_logout_url() %>
+          <% if current_user.username %>
             <div><%= link_to 'Personal Room', current_user.room_url %></div>
+          <% else %>
+            <div><%= link_to 'Set Username', edit_user_path(current_user) %></div>
+          <% end %>
         <% end %>
       </div>
     </div>

app/views/users/_form.html.erb

@@ -8,6 +8,9 @@
       </div>
       <%= f.submit class: "btn btn-success", value: "Save" %>
     <% end %>
+    <div class="error">
+      <p><%= error %></p>
+    </div>
     <div class="description">
       <p>This username will be used to identify your personal room</p>
     </div>

app/views/users/edit.html.erb

@@ -1,3 +1,3 @@
 <div class="page-wrapper user edit">
-  <%= render 'form', user: @user %>
+  <%= render 'form', user: @user, error: @error %>
 </div>