First working version

.gitignore

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+/.bundle/
+/doc/
+/log/*.log
+/pkg/
+/tmp/
+/test/dummy/db/*.sqlite3
+/test/dummy/db/*.sqlite3-*
+/test/dummy/log/*.log
+/test/dummy/storage/
+/test/dummy/tmp/

Gemfile

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+source "https://rubygems.org"
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+# Specify your gem's dependencies in revise_auth.gemspec.
+gemspec
+
+gem "puma"
+gem "sqlite3"
+gem "web-console"
+gem "sprockets-rails"
+gem "turbo-rails"
+gem "importmap-rails"
+
+# Start debugger with binding.b [https://github.com/ruby/debug]
+# gem "debug", ">= 1.0.0"

Gemfile.lock

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+PATH
+  remote: .
+  specs:
+    revise_auth (0.1.0)
+      bcrypt (~> 3.1)
+      rails (>= 7.0.4)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.0.4)
+      actionpack (= 7.0.4)
+      activesupport (= 7.0.4)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailbox (7.0.4)
+      actionpack (= 7.0.4)
+      activejob (= 7.0.4)
+      activerecord (= 7.0.4)
+      activestorage (= 7.0.4)
+      activesupport (= 7.0.4)
+      mail (>= 2.7.1)
+      net-imap
+      net-pop
+      net-smtp
+    actionmailer (7.0.4)
+      actionpack (= 7.0.4)
+      actionview (= 7.0.4)
+      activejob (= 7.0.4)
+      activesupport (= 7.0.4)
+      mail (~> 2.5, >= 2.5.4)
+      net-imap
+      net-pop
+      net-smtp
+      rails-dom-testing (~> 2.0)
+    actionpack (7.0.4)
+      actionview (= 7.0.4)
+      activesupport (= 7.0.4)
+      rack (~> 2.0, >= 2.2.0)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (7.0.4)
+      actionpack (= 7.0.4)
+      activerecord (= 7.0.4)
+      activestorage (= 7.0.4)
+      activesupport (= 7.0.4)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.0.4)
+      activesupport (= 7.0.4)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (7.0.4)
+      activesupport (= 7.0.4)
+      globalid (>= 0.3.6)
+    activemodel (7.0.4)
+      activesupport (= 7.0.4)
+    activerecord (7.0.4)
+      activemodel (= 7.0.4)
+      activesupport (= 7.0.4)
+    activestorage (7.0.4)
+      actionpack (= 7.0.4)
+      activejob (= 7.0.4)
+      activerecord (= 7.0.4)
+      activesupport (= 7.0.4)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (7.0.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    bcrypt (3.1.18)
+    bindex (0.8.1)
+    builder (3.2.4)
+    concurrent-ruby (1.1.10)
+    crass (1.0.6)
+    date (3.3.3)
+    erubi (1.12.0)
+    globalid (1.0.0)
+      activesupport (>= 5.0)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    importmap-rails (1.1.5)
+      actionpack (>= 6.0.0)
+      railties (>= 6.0.0)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    mail (2.8.0)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
+    method_source (1.0.0)
+    mini_mime (1.1.2)
+    minitest (5.17.0)
+    net-imap (0.3.4)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.1)
+      timeout
+    net-smtp (0.3.3)
+      net-protocol
+    nio4r (2.5.8)
+    nokogiri (1.13.10-arm64-darwin)
+      racc (~> 1.4)
+    puma (6.0.2)
+      nio4r (~> 2.0)
+    racc (1.6.2)
+    rack (2.2.5)
+    rack-test (2.0.2)
+      rack (>= 1.3)
+    rails (7.0.4)
+      actioncable (= 7.0.4)
+      actionmailbox (= 7.0.4)
+      actionmailer (= 7.0.4)
+      actionpack (= 7.0.4)
+      actiontext (= 7.0.4)
+      actionview (= 7.0.4)
+      activejob (= 7.0.4)
+      activemodel (= 7.0.4)
+      activerecord (= 7.0.4)
+      activestorage (= 7.0.4)
+      activesupport (= 7.0.4)
+      bundler (>= 1.15.0)
+      railties (= 7.0.4)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
+    railties (7.0.4)
+      actionpack (= 7.0.4)
+      activesupport (= 7.0.4)
+      method_source
+      rake (>= 12.2)
+      thor (~> 1.0)
+      zeitwerk (~> 2.5)
+    rake (13.0.6)
+    sprockets (4.2.0)
+      concurrent-ruby (~> 1.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      sprockets (>= 3.0.0)
+    sqlite3 (1.5.4-arm64-darwin)
+    thor (1.2.1)
+    timeout (0.3.1)
+    turbo-rails (1.3.2)
+      actionpack (>= 6.0.0)
+      activejob (>= 6.0.0)
+      railties (>= 6.0.0)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
+    web-console (4.2.0)
+      actionview (>= 6.0.0)
+      activemodel (>= 6.0.0)
+      bindex (>= 0.4.0)
+      railties (>= 6.0.0)
+    websocket-driver (0.7.5)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.6.6)
+
+PLATFORMS
+  arm64-darwin-22
+
+DEPENDENCIES
+  importmap-rails
+  puma
+  revise_auth!
+  sprockets-rails
+  sqlite3
+  turbo-rails
+  web-console
+
+BUNDLED WITH
+   2.4.3

MIT-LICENSE

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+Copyright 2023 Chris Oliver
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# ReviseAuth
+Short description and motivation.
+
+## Usage
+How to use my plugin.
+
+## Installation
+Add this line to your application's Gemfile:
+
+```ruby
+gem "revise_auth"
+```
+
+And then execute:
+```bash
+$ bundle
+```
+
+Or install it yourself as:
+```bash
+$ gem install revise_auth
+```
+
+## Contributing
+Contribution directions go here.
+
+## License
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

Rakefile

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+require "bundler/setup"
+
+require "bundler/gem_tasks"

app/controllers/revise_auth/email_controller.rb

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+class ReviseAuth::EmailController < ReviseAuthController
+  before_action :authenticate_user!, except: [:show]
+
+  # GET /profile/email?confirmation_token=abcdef
+  def show
+    if User.find_by(confirmation_token: params[:confirmation_token])&.confirm_email_change
+      flash[:notice] = "Your email address has been successfully confirmed."
+      user_signed_in?
+      redirect_to (user_signed_in? ? profile_path : root_path)
+    else
+      redirect_to root_path, alert: "Unable to confirm email address."
+    end
+  end
+
+  def update
+    if current_user.update(email_params)
+      current_user.send_confirmation_instructions
+      flash[:notice] = "A confirmation email has been sent to #{current_user.unconfirmed_email}"
+    end
+
+    redirect_to profile_path
+  end
+
+  private
+
+  def email_params
+    params.require(:user).permit(:unconfirmed_email)
+  end
+end

app/controllers/revise_auth/password_controller.rb

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+class ReviseAuth::PasswordController < ReviseAuthController
+  before_action :validate_current_password, only: [:update]
+
+  def update
+    if current_user.update(password_params)
+      flash[:notice] = "Your password has been changed successfully."
+    end
+
+    redirect_to profile_path
+  end
+
+  private
+
+  def password_params
+    params.require(:user).permit(:password, :password_confirmation)
+  end
+end

app/controllers/revise_auth/registrations_controller.rb

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+class ReviseAuth::RegistrationsController < ReviseAuthController
+  before_action :authenticate_user!, except: [:new, :create]
+
+  def new
+    @user = User.new
+  end
+
+  def create
+    @user = User.new(sign_up_params)
+    if @user.save
+      login(@user)
+      redirect_to root_path
+    else
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  def edit
+  end
+
+  def update
+    if current_user.update(profile_params)
+      redirect_to profile_path, notice: "Account updated successfully."
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
+  def destroy
+    current_user.destroy
+    logout
+    redirect_to root_path, status: :see_other, alert: I18n.t("revise_auth.account_deleted")
+  end
+
+  private
+
+  def sign_up_params
+    params.require(:user).permit(:name, :email, :password, :password_confirmation)
+  end
+
+  def profile_params
+    params.require(:user).permit(:name)
+  end
+end

app/controllers/revise_auth/sessions_controller.rb

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+class ReviseAuth::SessionsController < ReviseAuthController
+  def new
+  end
+
+  def create
+    if user = User.find_by(email: params[:email])&.authenticate(params[:password])
+      login(user)
+      redirect_to root_path
+    else
+      flash[:alert] = I18n.t("revise_auth.invalid_email_or_password")
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  def destroy
+    logout
+    redirect_to root_path
+  end
+end

app/controllers/revise_auth_controller.rb

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+class ReviseAuthController < ApplicationController
+  def validate_current_password
+    unless current_user.authenticate(params[:current_password])
+      flash[:alert] = "Your current password is incorrect. Please try again."
+      render :edit, status: :unprocessable_entity
+    end
+  end
+end

app/mailers/revise_auth/mailer.rb

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+class ReviseAuth::Mailer < ApplicationMailer
+  def confirm_email
+    mail to: params[:user].unconfirmed_email
+  end
+end