add email_merge_token to france connect information

app/models/france_connect_information.rb

@@ -31,14 +31,29 @@ class FranceConnectInformation < ApplicationRecord
     merge_token
   end
 
+  def create_email_merge_token!
+    email_merge_token = SecureRandom.uuid
+    update(email_merge_token:, email_merge_token_created_at: Time.zone.now)
+
+    email_merge_token
+  end
+
   def valid_for_merge?
     (MERGE_VALIDITY.ago < merge_token_created_at) && user_id.nil?
   end
 
+  def valid_for_email_merge?
+    (MERGE_VALIDITY.ago < email_merge_token_created_at) && user_id.nil?
+  end
+
   def delete_merge_token!
     update(merge_token: nil, merge_token_created_at: nil)
   end
 
+  def delete_email_merge_token!
+    update(email_merge_token: nil, email_merge_token_created_at: nil)
+  end
+
   def full_name
     [given_name, family_name].compact.join(" ")
   end

db/migrate/20240110113623_add_email_merge_token_column_to_france_connect_information.rb

@@ -0,0 +1,10 @@
+class AddEmailMergeTokenColumnToFranceConnectInformation < ActiveRecord::Migration[7.0]
+  disable_ddl_transaction!
+
+  def change
+    add_column :france_connect_informations, :email_merge_token, :string
+    add_column :france_connect_informations, :email_merge_token_created_at, :datetime
+
+    add_index :france_connect_informations, :email_merge_token, algorithm: :concurrently
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_12_21_142727) do
+ActiveRecord::Schema[7.0].define(version: 2024_01_10_113623) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -626,6 +626,8 @@ ActiveRecord::Schema[7.0].define(version: 2023_12_21_142727) do
     t.datetime "created_at", precision: nil, null: false
     t.jsonb "data"
     t.string "email_france_connect"
+    t.string "email_merge_token"
+    t.datetime "email_merge_token_created_at"
     t.string "family_name"
     t.string "france_connect_particulier_id"
     t.string "gender"
@@ -634,6 +636,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_12_21_142727) do
     t.datetime "merge_token_created_at", precision: nil
     t.datetime "updated_at", precision: nil, null: false
     t.integer "user_id"
+    t.index ["email_merge_token"], name: "index_france_connect_informations_on_email_merge_token"
     t.index ["merge_token"], name: "index_france_connect_informations_on_merge_token"
     t.index ["user_id"], name: "index_france_connect_informations_on_user_id"
   end