hps_learning/app/controllers/admin/hps_learnings_controller.rb

require 'zip/zip'
class Admin::HpsLearningsController < OrbitAdminController
  
  def index
    @table_fields = ["hps_learning.course_pic", "hps_learning.title", :category, "hps_learning.runtime"]
    @classes = HpsClass.all.desc(:created_at).page(params[:page]).per(10)
  end

  def new
    @hpsclass = HpsClass.new
  end

  def edit
    @hpsclass = HpsClass.find(params[:id])
  end

  def show
    @table_fields = ["hps_learning.lecture_pic", "hps_learning.subject", "hps_learning.presenter" , "hps_learning.runtime", "hps_learning.link_to_lecture"]
    @hpsclass = HpsClass.find(params[:id])
  end

  def create
    hpsclass = HpsClass.new(hps_class_params)
    hpsclass.save
    redirect_to admin_hps_learnings_path
  end

  def update
    hpsclass = HpsClass.find(params[:id])
    hpsclass.update_attributes(hps_class_params)
    redirect_to admin_hps_learnings_path
  end

  def destroy
    hpsclass = HpsClass.find(params[:id])
    hpsclass.destroy
    redirect_to admin_hps_learnings_path
  end

  def add_lecture
    @hpslecture = HpsLecture.new
  end

  def edit_lecture
    @hpslecture = HpsLecture.find(params[:id])
  end

  def delete_lecture
    hpslecture = HpsLecture.find(params[:id])
    clas = hpslecture.hps_class_id
    hpslecture.destroy
    redirect_to admin_hps_learning_path(clas)
  end

  def create_lecture
    hpsclass = HpsClass.find(params[:id])
    hpslecture = HpsLecture.new(hps_lecture_params)
    hpslecture.hps_class = hpsclass
    hpsfile = HpsLectureFile.find(params[:presentation_temp_id]) rescue nil
    hpslecture.hps_lecture_file = hpsfile if !hpsfile.nil?
    hpslecture.save
    redirect_to admin_hps_learning_path(hpsclass.id)
  end

  def update_lecture
    hpslecture = HpsLecture.find(params[:id])
    hpslecture.update_attributes(hps_lecture_params)
    hpsfile = HpsLectureFile.find(params[:presentation_temp_id]) rescue nil
    hpslecture.hps_lecture_file = hpsfile if !hpsfile.nil?
    hpslecture.save
    redirect_to admin_hps_learning_path(hpslecture.hps_class_id)
  end

  def upload_temp_file
    filepath = params[:path]
    file = params[:presentation_file]
    File.open(filepath,"ab"){ |f| f.write(file.read) }
    render :json => {"success" => true}.to_json
  end

  def get_temp_dir_name
    dirname = Digest::MD5.hexdigest(Time.now.to_s)
    directory = "public/hps_temp_files/#{dirname}"
    FileUtils.mkdir_p(directory) unless File.exists?(directory)
    path_to_file = "#{directory}/#{params[:filename]}"
    File.open(path_to_file,"w")
    hpsfile = HpsLectureFile.new
    hpsfile.presentation = Rails.root.join(path_to_file).open
    hpsfile.save
    hpsfile.index_path = hpsfile.presentation.url.sub(".zip", "/index.html")
    hpsfile.save
    FileUtils.remove_dir(directory)
    render :json => {"presentation_id" => hpsfile.id.to_s, "path" => hpsfile.presentation.path}.to_json
  end

  def clear_temp_dir
    presentation = HpsLectureFile.find(params[:presentation_id]) rescue nil
    if !presentation.nil?
      presentation.remove_presentation
      presentation.destroy
    end
    render :json => {"success" => true}.to_json
  end

  def extract_zip
    path = params[:path]
    destination = path.sub("/" + File.basename(path), "")
    files = []
    Zip::ZipFile.open(path) { |zip_file|
     zip_file.each { |f|
       f_path=File.join(destination, f.name)
       zip_file.extract(f, f_path) unless File.exist?(f_path)
       files << f.name
      }
    }
    if files.include?("index.html")
      render :json => {"success" => true}.to_json
    else
      render :json => {"success" => false, "msg" => "index.html file not present."}.to_json
    end
  end

  private

  def hps_class_params
    params.require(:hps_class).permit!
  end

  def hps_lecture_params
    params.require(:hps_lecture).permit!
  end

end