hackatime/app/controllers/errors_controller.rb

# frozen_string_literal: true

class ErrorsController < ApplicationController
  skip_before_action :verify_authenticity_token
  before_action :render_maintenance_page, except: :not_found

  def bad_request
    @status_code = 400
    @title = "Bad Request"
    @message = "The server cannot process your request due to invalid syntax."
    render_error
  end

  def not_found
    @status_code = 404
    @title = "Page Not Found"
    @message = "The page you were looking for doesn't exist. You may have mistyped the address or the page may have moved."
    render_error
  end

  def unprocessable_entity
    @status_code = 422
    @title = "Unprocessable Content"
    @message = "The request was well-formed but unable to be followed due to semantic errors."
    render_error
  end

  def internal_server_error
    @status_code = 500
    @title = "Internal Server Error"
    @message = "Something went wrong on our end, but we are looking into it!"
    @sentry_event_id = Sentry.last_event_id
    render_error
  end

  def service_unavailable
    @status_code = 503
    @title = "Service Unavailable"
    @message = "The service is temporarily unavailable. Please try again later."
    render_error
  end

  private

  def render_maintenance_page
    return unless ENV["MAINTENANCE_MODE"].present?

    render file: Rails.root.join("public", "maintenance.html"), layout: false, status: 503, content_type: "text/html"
  end

  def render_error
    respond_to do |format|
      format.html { render "errors/show", status: @status_code, layout: error_layout }
      format.json { render json: error_json, status: @status_code }
      format.any { render json: error_json, status: @status_code }
    end
  end

  def error_json
    response = {
      error: @title,
      message: @message,
      status: @status_code
    }
    response[:sentry_event_id] = @sentry_event_id if @sentry_event_id.present?
    response
  end

  def error_layout
    "errors"
  end
end