app.kluk.fr/app/controllers/day_logs_controller.rb

class DayLogsController < ApplicationController
  before_action :set_day_log, only: [ :edit, :update ]

  def new
    @day_log = DayLog.new
  end

  def create
    @day_log = Current.user.day_logs.build(day_log_params)

    if @day_log.save
      handle_mood(@day_log.day, params[:day_log][:mode_id])
      redirect_to root_path
    else
      render :new, status: :unprocessable_content
    end
  end

  def edit
  end

  def update
    if @day_log.update(day_log_params)
      handle_mood(@day_log.day, params[:day_log][:mode_id])
      redirect_to dashboard_path
    else
      render :edit, status: :unprocessable_content
    end
  end

  private

  def set_day_log
    @day_log = Current.user.day_logs.find(params[:id])
  end

  def handle_mood(day, mode_id)
    return if mode_id.blank?

    mood = Current.user.moods.find_by(recorded_at: day.beginning_of_day..day.end_of_day)

    if mood
      mood.update(mode_id: mode_id)
    else
      Current.user.moods.create(mode_id: mode_id, recorded_at: day.to_datetime)
    end
  end

  def day_log_params
    params.expect(day_log: [ :day, :info ])
  end
end