gavinksong/cs169-cucec

require 'pathname'
class Resource < ApplicationRecord
    belongs_to :admin
    # uploaders
    mount_uploader :attachment, AttachmentUploader
    mount_uploader :video, VideoUploader
    mount_uploader :audio, AudioUploader
    
    def self.read_english
        # YYYY-MM-DD_read_english.txt
        file = "#{Rails.public_path}/text/#{Date.today.to_s}_read_english.txt"
        return Pathname.new(file).exist? ? file : "public/empty.txt"
    end
    
    def self.read_chinese
        # YYYY-MM-DD_read_chinese.txt
        file = "#{Rails.public_path}/text/#{Date.today.to_s}_read_chinese.txt"
        return Pathname.new(file).exist? ? file : "public/empty.txt"
    end
    
    def self.listen
        # YYYY-MM-DD_listen.mp3
        file_path = "#{Rails.public_path}/audios/#{Date.today.to_s}_listen.mp3"
        file_name = "#{Date.today.to_s}_listen.mp3"
        return Pathname.new(file_path).exist? ? file_name : ""
    end
    
    def self.watch
      # YYYY-MM-DD_watch.mp4
      file_path = "#{Rails.public_path}/videos/#{Date.today.to_s}_watch.mp4"
      file_name = "#{Date.today.to_s}_watch.mp4"
      return Pathname.new(file_path).exist? ? file_name : ""
    end
    
    def delete_file
        file_name = nil
        types = [self[:attachment], self[:video], self[:audio]]
        types.each do |t|
            if file_name != nil
                break
            end
            file_name = t
        end
        file_type = file_name.split(".")[1]
        case file_type
            when "txt"
                path = "#{Rails.public_path}/text/" + file_name
            when "mp3"
                path = "#{Rails.public_path}/audios/" + file_name
            when "mp4"
                path = "#{Rails.public_path}/videos/" + file_name
            else
                return
        end
        FileUtils.rm_rf(path)
    end
end