user upgrades: add links to Stripe payment & receipt page.

Add links to the Stripe payment page and the Stripe receipt page on
completed user upgrades.

The Stripe payment link is a link to the payment details on the Stripe
dashboard and is only visible to the owner.

app/controllers/user_upgrades_controller.rb

@@ -27,6 +27,16 @@ class UserUpgradesController < ApplicationController
     respond_with(@user_upgrade)
   end
 
+  def receipt
+    @user_upgrade = authorize UserUpgrade.find(params[:id])
+    redirect_to @user_upgrade.receipt_url
+  end
+
+  def payment
+    @user_upgrade = authorize UserUpgrade.find(params[:id])
+    redirect_to @user_upgrade.payment_url
+  end
+
   private
 
   def recipient

app/models/user_upgrade.rb

@@ -198,6 +198,32 @@ class UserUpgrade < ApplicationRecord
       checkout
     end
 
+    def receipt_url
+      return nil if pending? || stripe_id.nil?
+
+      checkout_session = Stripe::Checkout::Session.retrieve(stripe_id)
+      payment_intent = Stripe::PaymentIntent.retrieve(checkout_session.payment_intent)
+      charge = payment_intent.charges.data.first
+      charge.receipt_url
+    end
+
+    def payment_url
+      return nil if pending? || stripe_id.nil?
+
+      checkout_session = Stripe::Checkout::Session.retrieve(stripe_id)
+      payment_intent = Stripe::PaymentIntent.retrieve(checkout_session.payment_intent)
+
+      "https://dashboard.stripe.com/payments/#{payment_intent.id}"
+    end
+
+    def has_receipt?
+      !pending?
+    end
+
+    def has_payment?
+      !pending?
+    end
+
     class_methods do
       def register_webhook
         webhook = Stripe::WebhookEndpoint.create({

app/policies/user_upgrade_policy.rb

@@ -10,4 +10,12 @@ class UserUpgradePolicy < ApplicationPolicy
   def show?
     record.recipient == user || record.purchaser == user || user.is_owner?
   end
+
+  def receipt?
+    (record.purchaser == user || user.is_owner?) && record.has_receipt?
+  end
+
+  def payment?
+    user.is_owner? && record.has_payment?
+  end
 end

app/views/user_upgrades/index.html.erb

@@ -28,8 +28,18 @@
 
       <% t.column :status %>
 
-      <% t.column "Updated" do |artist| %>
-        <%= time_ago_in_words_tagged(artist.updated_at) %>
+      <% t.column "Updated" do |user_upgrade| %>
+        <%= time_ago_in_words_tagged(user_upgrade.updated_at) %>
+      <% end %>
+
+      <% t.column column: "control" do |user_upgrade| %>
+        <%= link_to "Show", user_upgrade %>
+        <% if policy(user_upgrade).receipt? %>
+          | <%= link_to "Receipt", receipt_user_upgrade_path(user_upgrade), target: "_blank" %>
+        <% end %>
+        <% if policy(user_upgrade).payment? %>
+          | <%= link_to "Payment", payment_user_upgrade_path(user_upgrade), target: "_blank" %>
+        <% end %>
       <% end %>
     <% end %>
 

app/views/user_upgrades/show.html.erb

@@ -30,12 +30,18 @@
       <% if @user_upgrade.is_gift? && CurrentUser.user == @user_upgrade.recipient %>
         <p><%= link_to_user @user_upgrade.purchaser %> has upgraded your account to <%= @user_upgrade.level_string %>. Enjoy your new account!</p>
       <% elsif @user_upgrade.is_gift? && CurrentUser.user == @user_upgrade.purchaser %>
-        <p><%= link_to_user @user_upgrade.recipient %> is now a <%= @user_upgrade.level_string %> user. Thanks for supporting the site!</p>
+        <p><%= link_to_user @user_upgrade.recipient %> is now a <%= @user_upgrade.level_string %> user. Thanks for supporting the site! A receipt has been sent to your email.</p>
       <% else %>
-        <p>You are now a <%= @user_upgrade.level_string %> user. Thanks for supporting the site!</p>
+        <p>You are now a <%= @user_upgrade.level_string %> user. Thanks for supporting the site! A receipt has been sent to your email.</p>
       <% end %>
 
-      <p><%= link_to "Go back to #{Danbooru.config.canonical_app_name}", "https://danbooru.donmai.us" %> to continue using the site.</p>
+      <% if policy(@user_upgrade).receipt? %>
+        <%= link_to "View Receipt", receipt_user_upgrade_path(@user_upgrade), target: "_blank" %>
+      <% end %>
+
+      <% if policy(@user_upgrade).payment? %>
+        | <%= link_to "View Payment", payment_user_upgrade_path(@user_upgrade), target: "_blank" %>
+      <% end %>
     <% else %>
       <%= content_for :html_header do %>
         <meta http-equiv="refresh" content="5">