Add voting

app/controllers/admin_controller.rb

@@ -2,7 +2,7 @@ class AdminController < ApplicationController
   before_action :require_admin
 
   def index
-    @submissions = Submission.includes(:user).order(created_at: :desc)
+    @submissions = Submission.includes(:user, :votes).order(created_at: :desc)
   end
 
   def toggle_discard

app/controllers/pages_controller.rb

@@ -1,5 +1,10 @@
 class PagesController < ApplicationController
   def home
-    @submissions = Submission.kept.order("RANDOM()")
+    @submissions = Submission.kept.includes(:votes).sort_by { |s| -s.votes.size }
+    if Current.user
+      @voted_submission_ids = Current.user.votes.where(submission_id: @submissions.map(&:id)).pluck(:submission_id).to_set
+    else
+      @voted_submission_ids = Set.new
+    end
   end
 end

app/controllers/votes_controller.rb

@@ -0,0 +1,26 @@
+class VotesController < ApplicationController
+  before_action :require_authentication
+  before_action :set_submission
+
+  def create
+    vote = @submission.votes.new(user: Current.user)
+
+    if vote.save
+      redirect_back fallback_location: root_path
+    else
+      redirect_back fallback_location: root_path, alert: vote.errors.full_messages.first
+    end
+  end
+
+  def destroy
+    vote = @submission.votes.find_by(user: Current.user)
+    vote&.destroy
+    redirect_back fallback_location: root_path
+  end
+
+  private
+
+  def set_submission
+    @submission = Submission.find(params[:submission_id])
+  end
+end

app/models/submission.rb

@@ -1,5 +1,6 @@
 class Submission < ApplicationRecord
   belongs_to :user
+  has_many :votes
 
   validates :line1, :line2, :line3, presence: true
 

app/models/user.rb

@@ -1,5 +1,6 @@
 class User < ApplicationRecord
   has_one :submission
+  has_many :votes
 
   def self.find_or_create_from_omniauth(auth)
     find_or_create_by(github_uid: auth.uid) do |user|

app/models/vote.rb

@@ -0,0 +1,15 @@
+class Vote < ApplicationRecord
+  belongs_to :user
+  belongs_to :submission
+
+  validates :user_id, uniqueness: { scope: :submission_id }
+  validate :not_own_submission
+
+  private
+
+  def not_own_submission
+    if submission && user_id == submission.user_id
+      errors.add(:base, "You cannot vote on your own submission")
+    end
+  end
+end

app/views/admin/index.html.erb

@@ -11,6 +11,7 @@
                 <strong><%= submission.user.github_username %></strong>
                 (<%= submission.user.github_email %>)
                 &middot; <%= time_ago_in_words(submission.created_at) %> ago
+                &middot; <strong><%= submission.votes.size %></strong> vote<%= submission.votes.size == 1 ? "" : "s" %>
                 <% if submission.discarded? %>
                   <span class="text-red-400 font-medium">— discarded</span>
                 <% end %>

app/views/layouts/application.html.erb

@@ -13,9 +13,11 @@
     <%= yield :head %>
 
     <link rel="stylesheet" href="https://use.typekit.net/bzt5uqd.css">
+    <link rel="icon" href="/favicon.ico" sizes="any">
     <link rel="icon" href="/icon.png" type="image/png">
     <link rel="icon" href="/icon.svg" type="image/svg+xml">
-    <link rel="apple-touch-icon" href="/icon.png">
+    <link rel="apple-touch-icon" href="/apple-touch-icon.png">
+    <link rel="manifest" href="/manifest.webmanifest">
 
     <%= stylesheet_link_tag :app, "data-turbo-track": "reload" %>
     <%= javascript_include_tag "application", "data-turbo-track": "reload", type: "module" %>

app/views/pages/home.html.erb

@@ -56,6 +56,27 @@
               <%= submission.line2 %><br>
               <%= submission.line3 %>
             </p>
+
+            <div class="mt-4 flex items-center justify-between gap-2">
+              <div class="text-gray-500">
+                <%= submission.votes.size %> vote<%= submission.votes.size == 1 ? "" : "s" %>
+              </div>
+
+              <div>
+                <% if Current.user && submission.user_id != Current.user.id %>
+                  <% if @voted_submission_ids.include?(submission.id) %>
+                    <%= button_to submission_vote_path(submission), method: :delete, class: "inline-flex items-center gap-1 text-sm px-3 py-1 rounded-full cursor-pointer bg-gray-400 bg-linear-to-t from-gray-500 to-gray-400 text-white" do %>
+                      Voted
+                    <% end %>
+                  <% else %>
+                    <%= button_to submission_vote_path(submission), method: :post, class: "inline-flex items-center gap-1 text-sm px-3 py-1 rounded-full cursor-pointer bg-[#C41C1C] bg-linear-to-t from-[#C41C1C] to-[#DD423E] text-white" do %>
+                      ⬆ Vote
+                    <% end %>
+                  <% end %>
+                <% end %>
+              </div>
+
+            </div>
           </div>
         <% end %>
       </div>

config/routes.rb

@@ -5,7 +5,9 @@
   get "auth/failure", to: "sessions#failure"
   delete "sign_out", to: "sessions#destroy"
 
-  resources :submissions, only: [ :new, :create, :update ]
+  resources :submissions, only: [ :new, :create, :update ] do
+    resource :vote, only: [ :create, :destroy ]
+  end
 
   get "admin", to: "admin#index"
   post "admin/:id/toggle_discard", to: "admin#toggle_discard", as: :admin_toggle_discard

db/migrate/20260320191401_create_votes.rb

@@ -0,0 +1,12 @@
+class CreateVotes < ActiveRecord::Migration[8.1]
+  def change
+    create_table :votes do |t|
+      t.references :user, null: false, foreign_key: true
+      t.references :submission, null: false, foreign_key: true
+
+      t.timestamps
+    end
+
+    add_index :votes, [ :user_id, :submission_id ], unique: true
+  end
+end

public/manifest.webmanifest

@@ -0,0 +1,6 @@
+{
+  "icons": [
+    { "src": "/icon-192.png", "type": "image/png", "sizes": "192x192" },
+    { "src": "/icon-512.png", "type": "image/png", "sizes": "512x512" }
+  ]
+}