text: # -*- coding: utf-8 -*-
  """The app module, containing the app factory function."""
  import logging
  import sys
  
  from flask import Flask, render_template
  
  from capable_video.video_app import commands
  from capable_video import user, public
  from capable_video.video_app.extensions import (
      bcrypt,
      cache,
      csrf_protect,
      db,
      debug_toolbar,
      flask_static_digest,
      login_manager,
      migrate,
  )
  
  
  def create_app(config_object="capable_video.video_app.settings"):
      """Create application factory, as explained here: http://flask.pocoo.org/docs/patterns/appfactories/.
  
      :param config_object: The configuration object to use.
      """
      app = Flask(__name__.split(".")[0])
      app.config.from_object(config_object)
      register_extensions(app)
      register_blueprints(app)
      register_errorhandlers(app)
      register_shellcontext(app)
      register_commands(app)
      configure_logger(app)
      return app
  
  
  def register_extensions(app):
      """Register Flask extensions."""
      bcrypt.init_app(app)
      cache.init_app(app)
      db.init_app(app)
      csrf_protect.init_app(app)
      login_manager.init_app(app)
      debug_toolbar.init_app(app)
      migrate.init_app(app, db)
      flask_static_digest.init_app(app)
      return None
  
  
  def register_blueprints(app):
      """Register Flask blueprints."""
      app.register_blueprint(public.views.blueprint)
      app.register_blueprint(user.views.blueprint)
      return None
  
  
  def register_errorhandlers(app):
      """Register error handlers."""
  
      def render_error(error):
          """Render error template."""
          # If a HTTPException, pull the `code` attribute; default to 500
          error_code = getattr(error, "code", 500)
          return render_template(f"{error_code}.html"), error_code
  
      for errcode in [401, 404, 500]:
          app.errorhandler(errcode)(render_error)
      return None
  
  
  def register_shellcontext(app):
      """Register shell context objects."""
  
      def shell_context():
          """Shell context objects."""
          return {"db": db, "User": user.models.User}
  
      app.shell_context_processor(shell_context)
  
  
  def register_commands(app):
      """Register Click commands."""
      app.cli.add_command(commands.test)
      app.cli.add_command(commands.lint)
  
  
  def configure_logger(app):
      """Configure loggers."""
      handler = logging.StreamHandler(sys.stdout)
      if not app.logger.handlers:
          app.logger.addHandler(handler)
  