Allow user to disconnect OIDC account

This makes testing much easier. But probably also good for users to
revoke any access via OIDC apps. It also enables users to then connect
to a different account, or just renew the current connection.

app/controllers/admin/oidc_settings_controller.rb

@@ -2,6 +2,13 @@
 
 module Admin
   class OidcSettingsController < Spree::Admin::BaseController
-    def index; end
+    def index
+      @account = spree_current_user.oidc_account
+    end
+
+    def destroy
+      spree_current_user.oidc_account&.destroy
+      redirect_to admin_oidc_settings_path
+    end
   end
 end

app/models/spree/user.rb

@@ -42,6 +42,7 @@ module Spree
     has_many :credit_cards, dependent: :destroy
     has_many :report_rendering_options, class_name: "::ReportRenderingOptions", dependent: :destroy
     has_many :webhook_endpoints, dependent: :destroy
+    has_one :oidc_account, dependent: :destroy
 
     accepts_nested_attributes_for :enterprise_roles, allow_destroy: true
     accepts_nested_attributes_for :webhook_endpoints

app/views/admin/oidc_settings/index.html.haml

@@ -7,16 +7,17 @@
   %h2= t(".connect")
   %br
 
-  - # I'll refactor this later:
-  - account = OidcAccount.find_by(provider: "openid_connect", user: spree_current_user)
-  - if account
+  - if @account
     = t(".already_connected")
-    = account.uid
+    = @account.uid
     %br
     %br
 
     = t(".view_account")
     = link_to t(".les_communs_link"), "#{ Devise.omniauth_configs[:openid_connect].options[:issuer] }/account"
+    %br
+    %br
+    = button_to t(".disconnect"), admin_oidc_setting_path(@account), method: :delete
 
   - else
     = t(".link_your_account")

config/locales/en.yml

@@ -1712,6 +1712,7 @@ en:
       index:
         title: "OIDC Settings"
         connect: "Connect Your Account"
+        disconnect: "Disconnect"
         already_connected: "Your account is already linked to this DFC authorization account:"
         les_communs_link: "Les Communs Open ID server"
         link_your_account: "You need first to link your account with the authorization provider used by DFC (Les Communs Open ID Connect)."

config/routes/admin.rb

@@ -113,7 +113,7 @@ Openfoodnetwork::Application.routes.draw do
       put :unpause, on: :member
     end
 
-    resources :oidc_settings, only: :index
+    resources :oidc_settings, only: [:index, :destroy]
 
     resources :subscription_line_items, only: [], format: :json do
       post :build, on: :collection

spec/system/admin/oidc_settings_spec.rb

@@ -17,10 +17,13 @@ describe "OIDC Settings" do
       login_as user
     end
 
-    it "allows you to connect to an account" do
+    it "allows you to connect to an account and disconnect again" do
       visit admin_oidc_settings_path
       click_button "Link your Les Communs OIDC Account"
       expect(page).to have_content "Your account is already linked"
+
+      click_button "Disconnect"
+      expect(page).to have_button "Link your Les Communs OIDC Account"
     end
   end
 end