Validate candidate name

vedia.rb

@@ -346,11 +346,20 @@ post '/votes/:id/candidates' do
   find_vote
   require_organizer
   require_draft_vote
-  @candidate = Candidate.new(name: params[:name],
-                             description: params[:description])
-  @candidate.vote = @vote
-  @candidate.save
-  redirect '/votes/' + @vote.secure_id
+  @errors = []
+  if params[:name].empty?
+    @errors << OpenStruct.new(:attribute => :name, :type => :blank)
+  end
+  if not @errors.empty?
+    @params = params
+    erb :votes_edit
+  else
+    @candidate = Candidate.new(name: params[:name],
+                               description: params[:description])
+    @candidate.vote = @vote
+    @candidate.save
+    redirect '/votes/' + @vote.secure_id
+  end
 end
 
 get '/votes/:id/candidates/:cid' do
@@ -360,6 +369,8 @@ get '/votes/:id/candidates/:cid' do
   require_draft_vote
   find_candidate
   require_candidate_in_vote
+  params[:name] = @candidate.name
+  params[:description] = @candidate.description
   erb :candidates_edit
 end
 
@@ -370,11 +381,20 @@ post '/votes/:id/candidates/:cid' do
   require_draft_vote
   find_candidate
   require_candidate_in_vote
-  @candidate.name = params[:name]
-  @candidate.description = params[:description]
-  @candidate.save
-  redirect '/votes/' + @vote.secure_id
-  erb :candidates_edit
+  @errors = []
+  if params[:name].empty?
+    @errors << OpenStruct.new(:attribute => :name, :type => :blank)
+  end
+  if not @errors.empty?
+    @params = params
+    erb :candidates_edit
+  else
+    @candidate.name = params[:name]
+    @candidate.description = params[:description]
+    @candidate.save
+    redirect '/votes/' + @vote.secure_id
+    erb :candidates_edit
+  end
 end
 
 post '/votes/:id/candidates/:cid/delete' do

views/candidates_edit.erb

@@ -1,13 +1,21 @@
 <h1 class="mb-5"><%= _("Edit candidate") %></h1>
 
+<% if @errors %>
+<% @errors.each do |error| %>
+  <% if error.attribute == :name and error.type == :blank %>
+    <p class="alert alert-warning mb-4"><%= _("Enter a name.") %></p>
+  <% end %>
+<% end %>
+<% end %>
+
 <form action="/votes/<%= @vote.secure_id %>/candidates/<%= @candidate.id %>" method="post">
   <div class="mb-3">
     <label for="name" class="form-label"><%= _("Name") %></label>
-    <input type="text" name="name" value="<%= @candidate.name %>" class="form-control">
+    <input type="text" name="name" value="<%= params[:name] %>" class="form-control">
   </div>
   <div class="mb-3">
     <label for="description" class="form-label"><%= _("Description") %></label>
-    <textarea type="text" name="description" class="form-control"><%= @candidate.description %></textarea>
+    <textarea type="text" name="description" class="form-control"><%= params[:description] %></textarea>
   </div>
   <button type="submit" class="btn btn-primary"><%= _("Save") %></button>
 </form>

views/votes_edit.erb

@@ -40,14 +40,21 @@
     <% if @vote.candidates.empty? %>
       <p class="alert alert-primary mb-4"><%= _("This vote has no candidates yet. Add a first candidate.") %></p>
     <% end %>
+    <% if @errors %>
+    <% @errors.each do |error| %>
+      <% if error.attribute == :name and error.type == :blank %>
+        <p class="alert alert-warning mb-4"><%= _("Enter a name.") %></p>
+      <% end %>
+    <% end %>
+    <% end %>
     <form action="/votes/<%= @vote.secure_id %>/candidates" method="post">
       <div class="mb-3">
        <label for="name" class="form-label"><%= _("Name") %></label>
-        <input type="text" name="name" class="form-control">
+       <input type="text" name="name" value="<%= params[:name] %>" class="form-control">
       </div>
       <div class="mb-3">
         <label for="description" class="form-label"><%= _("Description") %></label>
-        <textarea type="text" name="description" class="form-control"></textarea>
+        <textarea type="text" name="description" class="form-control"><%= params[:description] %></textarea>
       </div>
     <% if @vote.candidates.length < 2 %>
       <button type="submit" class="btn btn-primary"><%= _("Add candidate") %></button>