User registation working. Sidebar built. Dashboard built. TOTP enable works - TOTP login works

app/controllers/totp_controller.rb

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+class TotpController < ApplicationController
+  before_action :set_user
+  before_action :redirect_if_totp_enabled, only: [:new, :create]
+  before_action :require_totp_enabled, only: [:backup_codes, :verify_password, :destroy]
+
+  # GET /totp/new - Show QR code to set up TOTP
+  def new
+    # Generate TOTP secret but don't save yet
+    @totp_secret = ROTP::Base32.random
+    @provisioning_uri = ROTP::TOTP.new(@totp_secret, issuer: "Clinch").provisioning_uri(@user.email_address)
+
+    # Generate QR code
+    require "rqrcode"
+    @qr_code = RQRCode::QRCode.new(@provisioning_uri)
+  end
+
+  # POST /totp - Verify TOTP code and enable 2FA
+  def create
+    totp_secret = params[:totp_secret]
+    code = params[:code]
+
+    # Verify the code works
+    totp = ROTP::TOTP.new(totp_secret)
+    if totp.verify(code, drift_behind: 30, drift_ahead: 30)
+      # Save the secret and generate backup codes
+      @user.totp_secret = totp_secret
+      @user.backup_codes = generate_backup_codes
+      @user.save!
+
+      # Redirect to backup codes page with success message
+      redirect_to backup_codes_totp_path, notice: "Two-factor authentication has been enabled successfully! Save these backup codes now."
+    else
+      redirect_to new_totp_path, alert: "Invalid verification code. Please try again."
+    end
+  end
+
+  # GET /totp/backup_codes - Show backup codes (requires password)
+  def backup_codes
+    # This will be shown after password verification
+    @backup_codes = @user.parsed_backup_codes
+  end
+
+  # POST /totp/verify_password - Verify password before showing backup codes
+  def verify_password
+    if @user.authenticate(params[:password])
+      redirect_to backup_codes_totp_path
+    else
+      redirect_to profile_path, alert: "Incorrect password."
+    end
+  end
+
+  # DELETE /totp - Disable TOTP (requires password)
+  def destroy
+    unless @user.authenticate(params[:password])
+      redirect_to profile_path, alert: "Incorrect password. Could not disable 2FA."
+      return
+    end
+
+    @user.disable_totp!
+    redirect_to profile_path, notice: "Two-factor authentication has been disabled."
+  end
+
+  private
+
+  def set_user
+    @user = Current.session.user
+  end
+
+  def redirect_if_totp_enabled
+    if @user.totp_enabled?
+      redirect_to profile_path, alert: "Two-factor authentication is already enabled."
+    end
+  end
+
+  def require_totp_enabled
+    unless @user.totp_enabled?
+      redirect_to profile_path, alert: "Two-factor authentication is not enabled."
+    end
+  end
+
+  def generate_backup_codes
+    Array.new(10) { SecureRandom.alphanumeric(8).upcase }.to_json
+  end
+end